ecb5c4318c
Same as the preceding commit, we unconditionally dereference the index's cache entries depending on the number of cache-tree entries, which can lead to a segfault when the cache-tree is corrupted. Fix this bug. This also makes t4058 pass with the leak sanitizer enabled. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
3068 lines
84 KiB
C
3068 lines
84 KiB
C
#define USE_THE_REPOSITORY_VARIABLE
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#include "git-compat-util.h"
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#include "advice.h"
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#include "strvec.h"
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#include "repository.h"
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#include "parse.h"
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#include "dir.h"
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#include "environment.h"
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#include "gettext.h"
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#include "hex.h"
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#include "name-hash.h"
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#include "tree.h"
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#include "tree-walk.h"
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#include "cache-tree.h"
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#include "unpack-trees.h"
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#include "progress.h"
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#include "refs.h"
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#include "attr.h"
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#include "read-cache.h"
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#include "split-index.h"
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#include "sparse-index.h"
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#include "submodule.h"
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#include "submodule-config.h"
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#include "symlinks.h"
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#include "trace2.h"
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#include "fsmonitor.h"
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#include "object-store-ll.h"
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#include "promisor-remote.h"
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#include "entry.h"
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#include "parallel-checkout.h"
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#include "setup.h"
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/*
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* Error messages expected by scripts out of plumbing commands such as
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* read-tree. Non-scripted Porcelain is not required to use these messages
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* and in fact are encouraged to reword them to better suit their particular
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* situation better. See how "git checkout" and "git merge" replaces
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* them using setup_unpack_trees_porcelain(), for example.
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*/
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static const char *unpack_plumbing_errors[NB_UNPACK_TREES_WARNING_TYPES] = {
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/* ERROR_WOULD_OVERWRITE */
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"Entry '%s' would be overwritten by merge. Cannot merge.",
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/* ERROR_NOT_UPTODATE_FILE */
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"Entry '%s' not uptodate. Cannot merge.",
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/* ERROR_NOT_UPTODATE_DIR */
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"Updating '%s' would lose untracked files in it",
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/* ERROR_CWD_IN_THE_WAY */
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"Refusing to remove '%s' since it is the current working directory.",
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/* ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN */
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"Untracked working tree file '%s' would be overwritten by merge.",
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/* ERROR_WOULD_LOSE_UNTRACKED_REMOVED */
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"Untracked working tree file '%s' would be removed by merge.",
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/* ERROR_BIND_OVERLAP */
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"Entry '%s' overlaps with '%s'. Cannot bind.",
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/* ERROR_WOULD_LOSE_SUBMODULE */
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"Submodule '%s' cannot checkout new HEAD.",
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/* NB_UNPACK_TREES_ERROR_TYPES; just a meta value */
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"",
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/* WARNING_SPARSE_NOT_UPTODATE_FILE */
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"Path '%s' not uptodate; will not remove from working tree.",
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/* WARNING_SPARSE_UNMERGED_FILE */
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"Path '%s' unmerged; will not remove from working tree.",
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/* WARNING_SPARSE_ORPHANED_NOT_OVERWRITTEN */
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"Path '%s' already present; will not overwrite with sparse update.",
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};
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#define ERRORMSG(o,type) \
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( ((o) && (o)->internal.msgs[(type)]) \
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? ((o)->internal.msgs[(type)]) \
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: (unpack_plumbing_errors[(type)]) )
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static const char *super_prefixed(const char *path, const char *super_prefix)
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{
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/*
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* It is necessary and sufficient to have two static buffers
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* here, as the return value of this function is fed to
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* error() using the unpack_*_errors[] templates we see above.
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*/
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static struct strbuf buf[2] = {STRBUF_INIT, STRBUF_INIT};
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static int super_prefix_len = -1;
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static unsigned idx = ARRAY_SIZE(buf) - 1;
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if (super_prefix_len < 0) {
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if (!super_prefix) {
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super_prefix_len = 0;
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} else {
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int i;
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for (i = 0; i < ARRAY_SIZE(buf); i++)
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strbuf_addstr(&buf[i], super_prefix);
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super_prefix_len = buf[0].len;
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}
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}
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if (!super_prefix_len)
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return path;
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if (++idx >= ARRAY_SIZE(buf))
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idx = 0;
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strbuf_setlen(&buf[idx], super_prefix_len);
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strbuf_addstr(&buf[idx], path);
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return buf[idx].buf;
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}
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void setup_unpack_trees_porcelain(struct unpack_trees_options *opts,
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const char *cmd)
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{
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int i;
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const char **msgs = opts->internal.msgs;
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const char *msg;
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strvec_init(&opts->internal.msgs_to_free);
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if (!strcmp(cmd, "checkout"))
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msg = advice_enabled(ADVICE_COMMIT_BEFORE_MERGE)
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? _("Your local changes to the following files would be overwritten by checkout:\n%%s"
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"Please commit your changes or stash them before you switch branches.")
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: _("Your local changes to the following files would be overwritten by checkout:\n%%s");
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else if (!strcmp(cmd, "merge"))
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msg = advice_enabled(ADVICE_COMMIT_BEFORE_MERGE)
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? _("Your local changes to the following files would be overwritten by merge:\n%%s"
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"Please commit your changes or stash them before you merge.")
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: _("Your local changes to the following files would be overwritten by merge:\n%%s");
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else
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msg = advice_enabled(ADVICE_COMMIT_BEFORE_MERGE)
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? _("Your local changes to the following files would be overwritten by %s:\n%%s"
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"Please commit your changes or stash them before you %s.")
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: _("Your local changes to the following files would be overwritten by %s:\n%%s");
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msgs[ERROR_WOULD_OVERWRITE] = msgs[ERROR_NOT_UPTODATE_FILE] =
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strvec_pushf(&opts->internal.msgs_to_free, msg, cmd, cmd);
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msgs[ERROR_NOT_UPTODATE_DIR] =
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_("Updating the following directories would lose untracked files in them:\n%s");
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msgs[ERROR_CWD_IN_THE_WAY] =
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_("Refusing to remove the current working directory:\n%s");
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if (!strcmp(cmd, "checkout"))
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msg = advice_enabled(ADVICE_COMMIT_BEFORE_MERGE)
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? _("The following untracked working tree files would be removed by checkout:\n%%s"
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"Please move or remove them before you switch branches.")
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: _("The following untracked working tree files would be removed by checkout:\n%%s");
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else if (!strcmp(cmd, "merge"))
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msg = advice_enabled(ADVICE_COMMIT_BEFORE_MERGE)
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? _("The following untracked working tree files would be removed by merge:\n%%s"
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"Please move or remove them before you merge.")
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: _("The following untracked working tree files would be removed by merge:\n%%s");
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else
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msg = advice_enabled(ADVICE_COMMIT_BEFORE_MERGE)
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? _("The following untracked working tree files would be removed by %s:\n%%s"
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"Please move or remove them before you %s.")
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: _("The following untracked working tree files would be removed by %s:\n%%s");
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msgs[ERROR_WOULD_LOSE_UNTRACKED_REMOVED] =
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strvec_pushf(&opts->internal.msgs_to_free, msg, cmd, cmd);
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if (!strcmp(cmd, "checkout"))
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msg = advice_enabled(ADVICE_COMMIT_BEFORE_MERGE)
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? _("The following untracked working tree files would be overwritten by checkout:\n%%s"
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"Please move or remove them before you switch branches.")
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: _("The following untracked working tree files would be overwritten by checkout:\n%%s");
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else if (!strcmp(cmd, "merge"))
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msg = advice_enabled(ADVICE_COMMIT_BEFORE_MERGE)
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? _("The following untracked working tree files would be overwritten by merge:\n%%s"
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"Please move or remove them before you merge.")
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: _("The following untracked working tree files would be overwritten by merge:\n%%s");
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else
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msg = advice_enabled(ADVICE_COMMIT_BEFORE_MERGE)
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? _("The following untracked working tree files would be overwritten by %s:\n%%s"
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"Please move or remove them before you %s.")
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: _("The following untracked working tree files would be overwritten by %s:\n%%s");
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msgs[ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN] =
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strvec_pushf(&opts->internal.msgs_to_free, msg, cmd, cmd);
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/*
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* Special case: ERROR_BIND_OVERLAP refers to a pair of paths, we
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* cannot easily display it as a list.
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*/
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msgs[ERROR_BIND_OVERLAP] = _("Entry '%s' overlaps with '%s'. Cannot bind.");
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msgs[ERROR_WOULD_LOSE_SUBMODULE] =
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_("Cannot update submodule:\n%s");
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msgs[WARNING_SPARSE_NOT_UPTODATE_FILE] =
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_("The following paths are not up to date and were left despite sparse patterns:\n%s");
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msgs[WARNING_SPARSE_UNMERGED_FILE] =
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_("The following paths are unmerged and were left despite sparse patterns:\n%s");
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msgs[WARNING_SPARSE_ORPHANED_NOT_OVERWRITTEN] =
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_("The following paths were already present and thus not updated despite sparse patterns:\n%s");
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opts->internal.show_all_errors = 1;
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/* rejected paths may not have a static buffer */
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for (i = 0; i < ARRAY_SIZE(opts->internal.unpack_rejects); i++)
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opts->internal.unpack_rejects[i].strdup_strings = 1;
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}
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void clear_unpack_trees_porcelain(struct unpack_trees_options *opts)
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{
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strvec_clear(&opts->internal.msgs_to_free);
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memset(opts->internal.msgs, 0, sizeof(opts->internal.msgs));
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discard_index(&opts->internal.result);
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}
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static int do_add_entry(struct unpack_trees_options *o, struct cache_entry *ce,
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unsigned int set, unsigned int clear)
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{
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clear |= CE_HASHED;
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if (set & CE_REMOVE)
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set |= CE_WT_REMOVE;
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ce->ce_flags = (ce->ce_flags & ~clear) | set;
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return add_index_entry(&o->internal.result, ce,
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ADD_CACHE_OK_TO_ADD | ADD_CACHE_OK_TO_REPLACE);
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}
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static void add_entry(struct unpack_trees_options *o,
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const struct cache_entry *ce,
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unsigned int set, unsigned int clear)
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{
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do_add_entry(o, dup_cache_entry(ce, &o->internal.result), set, clear);
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}
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/*
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* add error messages on path <path>
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* corresponding to the type <e> with the message <msg>
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* indicating if it should be display in porcelain or not
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*/
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static int add_rejected_path(struct unpack_trees_options *o,
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enum unpack_trees_error_types e,
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const char *path)
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{
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if (o->quiet)
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return -1;
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if (!o->internal.show_all_errors)
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return error(ERRORMSG(o, e), super_prefixed(path,
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o->super_prefix));
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/*
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* Otherwise, insert in a list for future display by
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* display_(error|warning)_msgs()
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*/
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string_list_append(&o->internal.unpack_rejects[e], path);
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return -1;
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}
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/*
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* display all the error messages stored in a nice way
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*/
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static void display_error_msgs(struct unpack_trees_options *o)
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{
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int e;
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unsigned error_displayed = 0;
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for (e = 0; e < NB_UNPACK_TREES_ERROR_TYPES; e++) {
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struct string_list *rejects = &o->internal.unpack_rejects[e];
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if (rejects->nr > 0) {
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int i;
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struct strbuf path = STRBUF_INIT;
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error_displayed = 1;
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for (i = 0; i < rejects->nr; i++)
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strbuf_addf(&path, "\t%s\n", rejects->items[i].string);
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error(ERRORMSG(o, e), super_prefixed(path.buf,
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o->super_prefix));
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strbuf_release(&path);
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}
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string_list_clear(rejects, 0);
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}
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if (error_displayed)
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fprintf(stderr, _("Aborting\n"));
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}
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/*
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* display all the warning messages stored in a nice way
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*/
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static void display_warning_msgs(struct unpack_trees_options *o)
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{
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int e;
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unsigned warning_displayed = 0;
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for (e = NB_UNPACK_TREES_ERROR_TYPES + 1;
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e < NB_UNPACK_TREES_WARNING_TYPES; e++) {
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struct string_list *rejects = &o->internal.unpack_rejects[e];
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if (rejects->nr > 0) {
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int i;
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struct strbuf path = STRBUF_INIT;
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warning_displayed = 1;
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for (i = 0; i < rejects->nr; i++)
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strbuf_addf(&path, "\t%s\n", rejects->items[i].string);
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warning(ERRORMSG(o, e), super_prefixed(path.buf,
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o->super_prefix));
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strbuf_release(&path);
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}
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string_list_clear(rejects, 0);
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}
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if (warning_displayed)
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fprintf(stderr, _("After fixing the above paths, you may want to run `git sparse-checkout reapply`.\n"));
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}
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static int check_submodule_move_head(const struct cache_entry *ce,
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const char *old_id,
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const char *new_id,
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struct unpack_trees_options *o)
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{
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unsigned flags = SUBMODULE_MOVE_HEAD_DRY_RUN;
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const struct submodule *sub = submodule_from_ce(ce);
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if (!sub)
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return 0;
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if (o->reset)
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flags |= SUBMODULE_MOVE_HEAD_FORCE;
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if (submodule_move_head(ce->name, o->super_prefix, old_id, new_id,
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flags))
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return add_rejected_path(o, ERROR_WOULD_LOSE_SUBMODULE, ce->name);
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return 0;
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}
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/*
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* Perform the loading of the repository's gitmodules file. This function is
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* used by 'check_update()' to perform loading of the gitmodules file in two
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* different situations:
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* (1) before removing entries from the working tree if the gitmodules file has
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* been marked for removal. This situation is specified by 'state' == NULL.
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* (2) before checking out entries to the working tree if the gitmodules file
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* has been marked for update. This situation is specified by 'state' != NULL.
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*/
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static void load_gitmodules_file(struct index_state *index,
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struct checkout *state)
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{
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int pos = index_name_pos(index, GITMODULES_FILE, strlen(GITMODULES_FILE));
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if (pos >= 0) {
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struct cache_entry *ce = index->cache[pos];
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if (!state && ce->ce_flags & CE_WT_REMOVE) {
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repo_read_gitmodules(the_repository, 0);
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} else if (state && (ce->ce_flags & CE_UPDATE)) {
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submodule_free(the_repository);
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checkout_entry(ce, state, NULL, NULL);
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repo_read_gitmodules(the_repository, 0);
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}
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}
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}
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static struct progress *get_progress(struct unpack_trees_options *o,
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struct index_state *index)
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{
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unsigned cnt = 0, total = 0;
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if (!o->update || !o->verbose_update)
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return NULL;
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for (; cnt < index->cache_nr; cnt++) {
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const struct cache_entry *ce = index->cache[cnt];
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if (ce->ce_flags & (CE_UPDATE | CE_WT_REMOVE))
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total++;
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}
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return start_delayed_progress(_("Updating files"), total);
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}
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static void setup_collided_checkout_detection(struct checkout *state,
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struct index_state *index)
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{
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int i;
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state->clone = 1;
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for (i = 0; i < index->cache_nr; i++)
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index->cache[i]->ce_flags &= ~CE_MATCHED;
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}
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static void report_collided_checkout(struct index_state *index)
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{
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struct string_list list = STRING_LIST_INIT_NODUP;
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int i;
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for (i = 0; i < index->cache_nr; i++) {
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struct cache_entry *ce = index->cache[i];
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if (!(ce->ce_flags & CE_MATCHED))
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continue;
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string_list_append(&list, ce->name);
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ce->ce_flags &= ~CE_MATCHED;
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}
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list.cmp = fspathcmp;
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string_list_sort(&list);
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if (list.nr) {
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warning(_("the following paths have collided (e.g. case-sensitive paths\n"
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"on a case-insensitive filesystem) and only one from the same\n"
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"colliding group is in the working tree:\n"));
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for (i = 0; i < list.nr; i++)
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fprintf(stderr, " '%s'\n", list.items[i].string);
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}
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string_list_clear(&list, 0);
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}
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static int must_checkout(const struct cache_entry *ce)
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{
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return ce->ce_flags & CE_UPDATE;
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}
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static int check_updates(struct unpack_trees_options *o,
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struct index_state *index)
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{
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unsigned cnt = 0;
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int errs = 0;
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struct progress *progress;
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struct checkout state = CHECKOUT_INIT;
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int i, pc_workers, pc_threshold;
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trace_performance_enter();
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state.super_prefix = o->super_prefix;
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state.force = 1;
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state.quiet = 1;
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state.refresh_cache = 1;
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state.istate = index;
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clone_checkout_metadata(&state.meta, &o->meta, NULL);
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if (!o->update || o->dry_run) {
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remove_marked_cache_entries(index, 0);
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trace_performance_leave("check_updates");
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return 0;
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}
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if (o->clone)
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setup_collided_checkout_detection(&state, index);
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progress = get_progress(o, index);
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/* Start with clean cache to avoid using any possibly outdated info. */
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invalidate_lstat_cache();
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git_attr_set_direction(GIT_ATTR_CHECKOUT);
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if (should_update_submodules())
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load_gitmodules_file(index, NULL);
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for (i = 0; i < index->cache_nr; i++) {
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const struct cache_entry *ce = index->cache[i];
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if (ce->ce_flags & CE_WT_REMOVE) {
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display_progress(progress, ++cnt);
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unlink_entry(ce, o->super_prefix);
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}
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}
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remove_marked_cache_entries(index, 0);
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remove_scheduled_dirs();
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if (should_update_submodules())
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load_gitmodules_file(index, &state);
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|
|
if (repo_has_promisor_remote(the_repository))
|
|
/*
|
|
* Prefetch the objects that are to be checked out in the loop
|
|
* below.
|
|
*/
|
|
prefetch_cache_entries(index, must_checkout);
|
|
|
|
get_parallel_checkout_configs(&pc_workers, &pc_threshold);
|
|
|
|
enable_delayed_checkout(&state);
|
|
if (pc_workers > 1)
|
|
init_parallel_checkout();
|
|
for (i = 0; i < index->cache_nr; i++) {
|
|
struct cache_entry *ce = index->cache[i];
|
|
|
|
if (must_checkout(ce)) {
|
|
size_t last_pc_queue_size = pc_queue_size();
|
|
|
|
if (ce->ce_flags & CE_WT_REMOVE)
|
|
BUG("both update and delete flags are set on %s",
|
|
ce->name);
|
|
ce->ce_flags &= ~CE_UPDATE;
|
|
errs |= checkout_entry(ce, &state, NULL, NULL);
|
|
|
|
if (last_pc_queue_size == pc_queue_size())
|
|
display_progress(progress, ++cnt);
|
|
}
|
|
}
|
|
if (pc_workers > 1)
|
|
errs |= run_parallel_checkout(&state, pc_workers, pc_threshold,
|
|
progress, &cnt);
|
|
stop_progress(&progress);
|
|
errs |= finish_delayed_checkout(&state, o->verbose_update);
|
|
git_attr_set_direction(GIT_ATTR_CHECKIN);
|
|
|
|
if (o->clone)
|
|
report_collided_checkout(index);
|
|
|
|
trace_performance_leave("check_updates");
|
|
return errs != 0;
|
|
}
|
|
|
|
static int verify_uptodate_sparse(const struct cache_entry *ce,
|
|
struct unpack_trees_options *o);
|
|
static int verify_absent_sparse(const struct cache_entry *ce,
|
|
enum unpack_trees_error_types,
|
|
struct unpack_trees_options *o);
|
|
|
|
static int apply_sparse_checkout(struct index_state *istate,
|
|
struct cache_entry *ce,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
int was_skip_worktree = ce_skip_worktree(ce);
|
|
|
|
if (ce->ce_flags & CE_NEW_SKIP_WORKTREE)
|
|
ce->ce_flags |= CE_SKIP_WORKTREE;
|
|
else
|
|
ce->ce_flags &= ~CE_SKIP_WORKTREE;
|
|
if (was_skip_worktree != ce_skip_worktree(ce)) {
|
|
ce->ce_flags |= CE_UPDATE_IN_BASE;
|
|
mark_fsmonitor_invalid(istate, ce);
|
|
istate->cache_changed |= CE_ENTRY_CHANGED;
|
|
}
|
|
|
|
/*
|
|
* if (!was_skip_worktree && !ce_skip_worktree()) {
|
|
* This is perfectly normal. Move on;
|
|
* }
|
|
*/
|
|
|
|
/*
|
|
* Merge strategies may set CE_UPDATE|CE_REMOVE outside checkout
|
|
* area as a result of ce_skip_worktree() shortcuts in
|
|
* verify_absent() and verify_uptodate().
|
|
* Make sure they don't modify worktree if they are already
|
|
* outside checkout area
|
|
*/
|
|
if (was_skip_worktree && ce_skip_worktree(ce)) {
|
|
ce->ce_flags &= ~CE_UPDATE;
|
|
|
|
/*
|
|
* By default, when CE_REMOVE is on, CE_WT_REMOVE is also
|
|
* on to get that file removed from both index and worktree.
|
|
* If that file is already outside worktree area, don't
|
|
* bother remove it.
|
|
*/
|
|
if (ce->ce_flags & CE_REMOVE)
|
|
ce->ce_flags &= ~CE_WT_REMOVE;
|
|
}
|
|
|
|
if (!was_skip_worktree && ce_skip_worktree(ce)) {
|
|
/*
|
|
* If CE_UPDATE is set, verify_uptodate() must be called already
|
|
* also stat info may have lost after merged_entry() so calling
|
|
* verify_uptodate() again may fail
|
|
*/
|
|
if (!(ce->ce_flags & CE_UPDATE) &&
|
|
verify_uptodate_sparse(ce, o)) {
|
|
ce->ce_flags &= ~CE_SKIP_WORKTREE;
|
|
return -1;
|
|
}
|
|
ce->ce_flags |= CE_WT_REMOVE;
|
|
ce->ce_flags &= ~CE_UPDATE;
|
|
}
|
|
if (was_skip_worktree && !ce_skip_worktree(ce)) {
|
|
if (verify_absent_sparse(ce, WARNING_SPARSE_ORPHANED_NOT_OVERWRITTEN, o))
|
|
return -1;
|
|
ce->ce_flags |= CE_UPDATE;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int warn_conflicted_path(struct index_state *istate,
|
|
int i,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
char *conflicting_path = istate->cache[i]->name;
|
|
int count = 0;
|
|
|
|
add_rejected_path(o, WARNING_SPARSE_UNMERGED_FILE, conflicting_path);
|
|
|
|
/* Find out how many higher stage entries are at same path */
|
|
while ((++count) + i < istate->cache_nr &&
|
|
!strcmp(conflicting_path, istate->cache[count + i]->name))
|
|
; /* do nothing */
|
|
|
|
return count;
|
|
}
|
|
|
|
static inline int call_unpack_fn(const struct cache_entry * const *src,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
int ret = o->fn(src, o);
|
|
if (ret > 0)
|
|
ret = 0;
|
|
return ret;
|
|
}
|
|
|
|
static void mark_ce_used(struct cache_entry *ce, struct unpack_trees_options *o)
|
|
{
|
|
ce->ce_flags |= CE_UNPACKED;
|
|
|
|
if (o->internal.cache_bottom < o->src_index->cache_nr &&
|
|
o->src_index->cache[o->internal.cache_bottom] == ce) {
|
|
int bottom = o->internal.cache_bottom;
|
|
|
|
while (bottom < o->src_index->cache_nr &&
|
|
o->src_index->cache[bottom]->ce_flags & CE_UNPACKED)
|
|
bottom++;
|
|
o->internal.cache_bottom = bottom;
|
|
}
|
|
}
|
|
|
|
static void mark_all_ce_unused(struct index_state *index)
|
|
{
|
|
int i;
|
|
for (i = 0; i < index->cache_nr; i++)
|
|
index->cache[i]->ce_flags &= ~(CE_UNPACKED | CE_ADDED | CE_NEW_SKIP_WORKTREE);
|
|
}
|
|
|
|
static int locate_in_src_index(const struct cache_entry *ce,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
struct index_state *index = o->src_index;
|
|
int len = ce_namelen(ce);
|
|
int pos = index_name_pos(index, ce->name, len);
|
|
if (pos < 0)
|
|
pos = -1 - pos;
|
|
return pos;
|
|
}
|
|
|
|
/*
|
|
* We call unpack_index_entry() with an unmerged cache entry
|
|
* only in diff-index, and it wants a single callback. Skip
|
|
* the other unmerged entry with the same name.
|
|
*/
|
|
static void mark_ce_used_same_name(struct cache_entry *ce,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
struct index_state *index = o->src_index;
|
|
int len = ce_namelen(ce);
|
|
int pos;
|
|
|
|
for (pos = locate_in_src_index(ce, o); pos < index->cache_nr; pos++) {
|
|
struct cache_entry *next = index->cache[pos];
|
|
if (len != ce_namelen(next) ||
|
|
memcmp(ce->name, next->name, len))
|
|
break;
|
|
mark_ce_used(next, o);
|
|
}
|
|
}
|
|
|
|
static struct cache_entry *next_cache_entry(struct unpack_trees_options *o)
|
|
{
|
|
const struct index_state *index = o->src_index;
|
|
int pos = o->internal.cache_bottom;
|
|
|
|
while (pos < index->cache_nr) {
|
|
struct cache_entry *ce = index->cache[pos];
|
|
if (!(ce->ce_flags & CE_UNPACKED))
|
|
return ce;
|
|
pos++;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static void add_same_unmerged(const struct cache_entry *ce,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
struct index_state *index = o->src_index;
|
|
int len = ce_namelen(ce);
|
|
int pos = index_name_pos(index, ce->name, len);
|
|
|
|
if (0 <= pos)
|
|
die("programming error in a caller of mark_ce_used_same_name");
|
|
for (pos = -pos - 1; pos < index->cache_nr; pos++) {
|
|
struct cache_entry *next = index->cache[pos];
|
|
if (len != ce_namelen(next) ||
|
|
memcmp(ce->name, next->name, len))
|
|
break;
|
|
add_entry(o, next, 0, 0);
|
|
mark_ce_used(next, o);
|
|
}
|
|
}
|
|
|
|
static int unpack_index_entry(struct cache_entry *ce,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
const struct cache_entry *src[MAX_UNPACK_TREES + 1] = { NULL, };
|
|
int ret;
|
|
|
|
src[0] = ce;
|
|
|
|
mark_ce_used(ce, o);
|
|
if (ce_stage(ce)) {
|
|
if (o->skip_unmerged) {
|
|
add_entry(o, ce, 0, 0);
|
|
return 0;
|
|
}
|
|
}
|
|
ret = call_unpack_fn(src, o);
|
|
if (ce_stage(ce))
|
|
mark_ce_used_same_name(ce, o);
|
|
return ret;
|
|
}
|
|
|
|
static int find_cache_pos(struct traverse_info *, const char *p, size_t len);
|
|
|
|
static void restore_cache_bottom(struct traverse_info *info, int bottom)
|
|
{
|
|
struct unpack_trees_options *o = info->data;
|
|
|
|
if (o->diff_index_cached)
|
|
return;
|
|
o->internal.cache_bottom = bottom;
|
|
}
|
|
|
|
static int switch_cache_bottom(struct traverse_info *info)
|
|
{
|
|
struct unpack_trees_options *o = info->data;
|
|
int ret, pos;
|
|
|
|
if (o->diff_index_cached)
|
|
return 0;
|
|
ret = o->internal.cache_bottom;
|
|
pos = find_cache_pos(info->prev, info->name, info->namelen);
|
|
|
|
if (pos < -1)
|
|
o->internal.cache_bottom = -2 - pos;
|
|
else if (pos < 0)
|
|
o->internal.cache_bottom = o->src_index->cache_nr;
|
|
return ret;
|
|
}
|
|
|
|
static inline int are_same_oid(struct name_entry *name_j, struct name_entry *name_k)
|
|
{
|
|
return !is_null_oid(&name_j->oid) && !is_null_oid(&name_k->oid) && oideq(&name_j->oid, &name_k->oid);
|
|
}
|
|
|
|
static int all_trees_same_as_cache_tree(int n, unsigned long dirmask,
|
|
struct name_entry *names,
|
|
struct traverse_info *info)
|
|
{
|
|
struct unpack_trees_options *o = info->data;
|
|
int i;
|
|
|
|
if (!o->merge || dirmask != ((1 << n) - 1))
|
|
return 0;
|
|
|
|
for (i = 1; i < n; i++)
|
|
if (!are_same_oid(names, names + i))
|
|
return 0;
|
|
|
|
return cache_tree_matches_traversal(o->src_index->cache_tree, names, info);
|
|
}
|
|
|
|
static int index_pos_by_traverse_info(struct name_entry *names,
|
|
struct traverse_info *info)
|
|
{
|
|
struct unpack_trees_options *o = info->data;
|
|
struct strbuf name = STRBUF_INIT;
|
|
int pos;
|
|
|
|
strbuf_make_traverse_path(&name, info, names->path, names->pathlen);
|
|
strbuf_addch(&name, '/');
|
|
pos = index_name_pos(o->src_index, name.buf, name.len);
|
|
if (pos >= 0) {
|
|
if (!o->src_index->sparse_index ||
|
|
!(o->src_index->cache[pos]->ce_flags & CE_SKIP_WORKTREE))
|
|
BUG("This is a directory and should not exist in index");
|
|
} else {
|
|
pos = -pos - 1;
|
|
}
|
|
if (pos >= o->src_index->cache_nr ||
|
|
!starts_with(o->src_index->cache[pos]->name, name.buf) ||
|
|
(pos > 0 && starts_with(o->src_index->cache[pos-1]->name, name.buf)))
|
|
BUG("pos %d doesn't point to the first entry of %s in index",
|
|
pos, name.buf);
|
|
strbuf_release(&name);
|
|
return pos;
|
|
}
|
|
|
|
/*
|
|
* Fast path if we detect that all trees are the same as cache-tree at this
|
|
* path. We'll walk these trees in an iterative loop using cache-tree/index
|
|
* instead of ODB since we already know what these trees contain.
|
|
*/
|
|
static int traverse_by_cache_tree(int pos, int nr_entries, int nr_names,
|
|
struct traverse_info *info)
|
|
{
|
|
struct cache_entry *src[MAX_UNPACK_TREES + 1] = { NULL, };
|
|
struct unpack_trees_options *o = info->data;
|
|
struct cache_entry *tree_ce = NULL;
|
|
int ce_len = 0;
|
|
int i, d;
|
|
|
|
if (!o->merge)
|
|
BUG("We need cache-tree to do this optimization");
|
|
if (nr_entries + pos > o->src_index->cache_nr)
|
|
return error(_("corrupted cache-tree has entries not present in index"));
|
|
|
|
/*
|
|
* Do what unpack_callback() and unpack_single_entry() normally
|
|
* do. But we walk all paths in an iterative loop instead.
|
|
*
|
|
* D/F conflicts and higher stage entries are not a concern
|
|
* because cache-tree would be invalidated and we would never
|
|
* get here in the first place.
|
|
*/
|
|
for (i = 0; i < nr_entries; i++) {
|
|
int new_ce_len, len, rc;
|
|
|
|
src[0] = o->src_index->cache[pos + i];
|
|
|
|
len = ce_namelen(src[0]);
|
|
new_ce_len = cache_entry_size(len);
|
|
|
|
if (new_ce_len > ce_len) {
|
|
new_ce_len <<= 1;
|
|
tree_ce = xrealloc(tree_ce, new_ce_len);
|
|
memset(tree_ce, 0, new_ce_len);
|
|
ce_len = new_ce_len;
|
|
|
|
tree_ce->ce_flags = create_ce_flags(0);
|
|
|
|
for (d = 1; d <= nr_names; d++)
|
|
src[d] = tree_ce;
|
|
}
|
|
|
|
tree_ce->ce_mode = src[0]->ce_mode;
|
|
tree_ce->ce_namelen = len;
|
|
oidcpy(&tree_ce->oid, &src[0]->oid);
|
|
memcpy(tree_ce->name, src[0]->name, len + 1);
|
|
|
|
rc = call_unpack_fn((const struct cache_entry * const *)src, o);
|
|
if (rc < 0) {
|
|
free(tree_ce);
|
|
return rc;
|
|
}
|
|
|
|
mark_ce_used(src[0], o);
|
|
}
|
|
free(tree_ce);
|
|
if (o->internal.debug_unpack)
|
|
printf("Unpacked %d entries from %s to %s using cache-tree\n",
|
|
nr_entries,
|
|
o->src_index->cache[pos]->name,
|
|
o->src_index->cache[pos + nr_entries - 1]->name);
|
|
return 0;
|
|
}
|
|
|
|
static int traverse_trees_recursive(int n, unsigned long dirmask,
|
|
unsigned long df_conflicts,
|
|
struct name_entry *names,
|
|
struct traverse_info *info)
|
|
{
|
|
struct unpack_trees_options *o = info->data;
|
|
int i, ret, bottom;
|
|
int nr_buf = 0;
|
|
struct tree_desc *t;
|
|
void **buf;
|
|
struct traverse_info newinfo;
|
|
struct name_entry *p;
|
|
int nr_entries;
|
|
|
|
nr_entries = all_trees_same_as_cache_tree(n, dirmask, names, info);
|
|
if (nr_entries > 0) {
|
|
int pos = index_pos_by_traverse_info(names, info);
|
|
|
|
if (!o->merge || df_conflicts)
|
|
BUG("Wrong condition to get here buddy");
|
|
|
|
/*
|
|
* All entries up to 'pos' must have been processed
|
|
* (i.e. marked CE_UNPACKED) at this point. But to be safe,
|
|
* save and restore cache_bottom anyway to not miss
|
|
* unprocessed entries before 'pos'.
|
|
*/
|
|
bottom = o->internal.cache_bottom;
|
|
ret = traverse_by_cache_tree(pos, nr_entries, n, info);
|
|
o->internal.cache_bottom = bottom;
|
|
return ret;
|
|
}
|
|
|
|
p = names;
|
|
while (!p->mode)
|
|
p++;
|
|
|
|
newinfo = *info;
|
|
newinfo.prev = info;
|
|
newinfo.pathspec = info->pathspec;
|
|
newinfo.name = p->path;
|
|
newinfo.namelen = p->pathlen;
|
|
newinfo.mode = p->mode;
|
|
newinfo.pathlen = st_add3(newinfo.pathlen, tree_entry_len(p), 1);
|
|
newinfo.df_conflicts |= df_conflicts;
|
|
|
|
ALLOC_ARRAY(t, n);
|
|
ALLOC_ARRAY(buf, n);
|
|
|
|
/*
|
|
* Fetch the tree from the ODB for each peer directory in the
|
|
* n commits.
|
|
*
|
|
* For 2- and 3-way traversals, we try to avoid hitting the
|
|
* ODB twice for the same OID. This should yield a nice speed
|
|
* up in checkouts and merges when the commits are similar.
|
|
*
|
|
* We don't bother doing the full O(n^2) search for larger n,
|
|
* because wider traversals don't happen that often and we
|
|
* avoid the search setup.
|
|
*
|
|
* When 2 peer OIDs are the same, we just copy the tree
|
|
* descriptor data. This implicitly borrows the buffer
|
|
* data from the earlier cell.
|
|
*/
|
|
for (i = 0; i < n; i++, dirmask >>= 1) {
|
|
if (i > 0 && are_same_oid(&names[i], &names[i - 1]))
|
|
t[i] = t[i - 1];
|
|
else if (i > 1 && are_same_oid(&names[i], &names[i - 2]))
|
|
t[i] = t[i - 2];
|
|
else {
|
|
const struct object_id *oid = NULL;
|
|
if (dirmask & 1)
|
|
oid = &names[i].oid;
|
|
buf[nr_buf++] = fill_tree_descriptor(the_repository, t + i, oid);
|
|
}
|
|
}
|
|
|
|
bottom = switch_cache_bottom(&newinfo);
|
|
ret = traverse_trees(o->src_index, n, t, &newinfo);
|
|
restore_cache_bottom(&newinfo, bottom);
|
|
|
|
for (i = 0; i < nr_buf; i++)
|
|
free(buf[i]);
|
|
free(buf);
|
|
free(t);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Compare the traverse-path to the cache entry without actually
|
|
* having to generate the textual representation of the traverse
|
|
* path.
|
|
*
|
|
* NOTE! This *only* compares up to the size of the traverse path
|
|
* itself - the caller needs to do the final check for the cache
|
|
* entry having more data at the end!
|
|
*/
|
|
static int do_compare_entry_piecewise(const struct cache_entry *ce,
|
|
const struct traverse_info *info,
|
|
const char *name, size_t namelen,
|
|
unsigned mode)
|
|
{
|
|
int pathlen, ce_len;
|
|
const char *ce_name;
|
|
|
|
if (info->prev) {
|
|
int cmp = do_compare_entry_piecewise(ce, info->prev,
|
|
info->name, info->namelen,
|
|
info->mode);
|
|
if (cmp)
|
|
return cmp;
|
|
}
|
|
pathlen = info->pathlen;
|
|
ce_len = ce_namelen(ce);
|
|
|
|
/* If ce_len < pathlen then we must have previously hit "name == directory" entry */
|
|
if (ce_len < pathlen)
|
|
return -1;
|
|
|
|
ce_len -= pathlen;
|
|
ce_name = ce->name + pathlen;
|
|
|
|
return df_name_compare(ce_name, ce_len, S_IFREG, name, namelen, mode);
|
|
}
|
|
|
|
static int do_compare_entry(const struct cache_entry *ce,
|
|
const struct traverse_info *info,
|
|
const char *name, size_t namelen,
|
|
unsigned mode)
|
|
{
|
|
int pathlen, ce_len;
|
|
const char *ce_name;
|
|
int cmp;
|
|
unsigned ce_mode;
|
|
|
|
/*
|
|
* If we have not precomputed the traverse path, it is quicker
|
|
* to avoid doing so. But if we have precomputed it,
|
|
* it is quicker to use the precomputed version.
|
|
*/
|
|
if (!info->traverse_path)
|
|
return do_compare_entry_piecewise(ce, info, name, namelen, mode);
|
|
|
|
cmp = strncmp(ce->name, info->traverse_path, info->pathlen);
|
|
if (cmp)
|
|
return cmp;
|
|
|
|
pathlen = info->pathlen;
|
|
ce_len = ce_namelen(ce);
|
|
|
|
if (ce_len < pathlen)
|
|
return -1;
|
|
|
|
ce_len -= pathlen;
|
|
ce_name = ce->name + pathlen;
|
|
|
|
ce_mode = S_ISSPARSEDIR(ce->ce_mode) ? S_IFDIR : S_IFREG;
|
|
return df_name_compare(ce_name, ce_len, ce_mode, name, namelen, mode);
|
|
}
|
|
|
|
static int compare_entry(const struct cache_entry *ce, const struct traverse_info *info, const struct name_entry *n)
|
|
{
|
|
int cmp = do_compare_entry(ce, info, n->path, n->pathlen, n->mode);
|
|
if (cmp)
|
|
return cmp;
|
|
|
|
/*
|
|
* At this point, we know that we have a prefix match. If ce
|
|
* is a sparse directory, then allow an exact match. This only
|
|
* works when the input name is a directory, since ce->name
|
|
* ends in a directory separator.
|
|
*/
|
|
if (S_ISSPARSEDIR(ce->ce_mode) &&
|
|
ce->ce_namelen == traverse_path_len(info, tree_entry_len(n)) + 1)
|
|
return 0;
|
|
|
|
/*
|
|
* Even if the beginning compared identically, the ce should
|
|
* compare as bigger than a directory leading up to it!
|
|
*/
|
|
return ce_namelen(ce) > traverse_path_len(info, tree_entry_len(n));
|
|
}
|
|
|
|
static int ce_in_traverse_path(const struct cache_entry *ce,
|
|
const struct traverse_info *info)
|
|
{
|
|
if (!info->prev)
|
|
return 1;
|
|
if (do_compare_entry(ce, info->prev,
|
|
info->name, info->namelen, info->mode))
|
|
return 0;
|
|
/*
|
|
* If ce (blob) is the same name as the path (which is a tree
|
|
* we will be descending into), it won't be inside it.
|
|
*/
|
|
return (info->pathlen < ce_namelen(ce));
|
|
}
|
|
|
|
static struct cache_entry *create_ce_entry(const struct traverse_info *info,
|
|
const struct name_entry *n,
|
|
int stage,
|
|
struct index_state *istate,
|
|
int is_transient,
|
|
int is_sparse_directory)
|
|
{
|
|
size_t len = traverse_path_len(info, tree_entry_len(n));
|
|
size_t alloc_len = is_sparse_directory ? len + 1 : len;
|
|
struct cache_entry *ce =
|
|
is_transient ?
|
|
make_empty_transient_cache_entry(alloc_len, NULL) :
|
|
make_empty_cache_entry(istate, alloc_len);
|
|
|
|
ce->ce_mode = create_ce_mode(n->mode);
|
|
ce->ce_flags = create_ce_flags(stage);
|
|
ce->ce_namelen = len;
|
|
oidcpy(&ce->oid, &n->oid);
|
|
/* len+1 because the cache_entry allocates space for NUL */
|
|
make_traverse_path(ce->name, len + 1, info, n->path, n->pathlen);
|
|
|
|
if (is_sparse_directory) {
|
|
ce->name[len] = '/';
|
|
ce->name[len + 1] = '\0';
|
|
ce->ce_namelen++;
|
|
ce->ce_flags |= CE_SKIP_WORKTREE;
|
|
}
|
|
|
|
return ce;
|
|
}
|
|
|
|
/*
|
|
* Determine whether the path specified by 'p' should be unpacked as a new
|
|
* sparse directory in a sparse index. A new sparse directory 'A/':
|
|
* - must be outside the sparse cone.
|
|
* - must not already be in the index (i.e., no index entry with name 'A/'
|
|
* exists).
|
|
* - must not have any child entries in the index (i.e., no index entry
|
|
* 'A/<something>' exists).
|
|
* If 'p' meets the above requirements, return 1; otherwise, return 0.
|
|
*/
|
|
static int entry_is_new_sparse_dir(const struct traverse_info *info,
|
|
const struct name_entry *p)
|
|
{
|
|
int res, pos;
|
|
struct strbuf dirpath = STRBUF_INIT;
|
|
struct unpack_trees_options *o = info->data;
|
|
|
|
if (!S_ISDIR(p->mode))
|
|
return 0;
|
|
|
|
/*
|
|
* If the path is inside the sparse cone, it can't be a sparse directory.
|
|
*/
|
|
strbuf_add(&dirpath, info->traverse_path, info->pathlen);
|
|
strbuf_add(&dirpath, p->path, p->pathlen);
|
|
strbuf_addch(&dirpath, '/');
|
|
if (path_in_cone_mode_sparse_checkout(dirpath.buf, o->src_index)) {
|
|
res = 0;
|
|
goto cleanup;
|
|
}
|
|
|
|
pos = index_name_pos_sparse(o->src_index, dirpath.buf, dirpath.len);
|
|
if (pos >= 0) {
|
|
/* Path is already in the index, not a new sparse dir */
|
|
res = 0;
|
|
goto cleanup;
|
|
}
|
|
|
|
/* Where would this sparse dir be inserted into the index? */
|
|
pos = -pos - 1;
|
|
if (pos >= o->src_index->cache_nr) {
|
|
/*
|
|
* Sparse dir would be inserted at the end of the index, so we
|
|
* know it has no child entries.
|
|
*/
|
|
res = 1;
|
|
goto cleanup;
|
|
}
|
|
|
|
/*
|
|
* If the dir has child entries in the index, the first would be at the
|
|
* position the sparse directory would be inserted. If the entry at this
|
|
* position is inside the dir, not a new sparse dir.
|
|
*/
|
|
res = strncmp(o->src_index->cache[pos]->name, dirpath.buf, dirpath.len);
|
|
|
|
cleanup:
|
|
strbuf_release(&dirpath);
|
|
return res;
|
|
}
|
|
|
|
/*
|
|
* Note that traverse_by_cache_tree() duplicates some logic in this function
|
|
* without actually calling it. If you change the logic here you may need to
|
|
* check and change there as well.
|
|
*/
|
|
static int unpack_single_entry(int n, unsigned long mask,
|
|
unsigned long dirmask,
|
|
struct cache_entry **src,
|
|
const struct name_entry *names,
|
|
const struct traverse_info *info,
|
|
int *is_new_sparse_dir)
|
|
{
|
|
int i;
|
|
struct unpack_trees_options *o = info->data;
|
|
unsigned long conflicts = info->df_conflicts | dirmask;
|
|
const struct name_entry *p = names;
|
|
|
|
*is_new_sparse_dir = 0;
|
|
if (mask == dirmask && !src[0]) {
|
|
/*
|
|
* If we're not in a sparse index, we can't unpack a directory
|
|
* without recursing into it, so we return.
|
|
*/
|
|
if (!o->src_index->sparse_index)
|
|
return 0;
|
|
|
|
/* Find first entry with a real name (we could use "mask" too) */
|
|
while (!p->mode)
|
|
p++;
|
|
|
|
/*
|
|
* If the directory is completely missing from the index but
|
|
* would otherwise be a sparse directory, we should unpack it.
|
|
* If not, we'll return and continue recursively traversing the
|
|
* tree.
|
|
*/
|
|
*is_new_sparse_dir = entry_is_new_sparse_dir(info, p);
|
|
if (!*is_new_sparse_dir)
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* When we are unpacking a sparse directory, then this isn't necessarily
|
|
* a directory-file conflict.
|
|
*/
|
|
if (mask == dirmask &&
|
|
(*is_new_sparse_dir || (src[0] && S_ISSPARSEDIR(src[0]->ce_mode))))
|
|
conflicts = 0;
|
|
|
|
/*
|
|
* Ok, we've filled in up to any potential index entry in src[0],
|
|
* now do the rest.
|
|
*/
|
|
for (i = 0; i < n; i++) {
|
|
int stage;
|
|
unsigned int bit = 1ul << i;
|
|
if (conflicts & bit) {
|
|
src[i + o->merge] = o->df_conflict_entry;
|
|
continue;
|
|
}
|
|
if (!(mask & bit))
|
|
continue;
|
|
if (!o->merge)
|
|
stage = 0;
|
|
else if (i + 1 < o->head_idx)
|
|
stage = 1;
|
|
else if (i + 1 > o->head_idx)
|
|
stage = 3;
|
|
else
|
|
stage = 2;
|
|
|
|
/*
|
|
* If the merge bit is set, then the cache entries are
|
|
* discarded in the following block. In this case,
|
|
* construct "transient" cache_entries, as they are
|
|
* not stored in the index. otherwise construct the
|
|
* cache entry from the index aware logic.
|
|
*/
|
|
src[i + o->merge] = create_ce_entry(info, names + i, stage,
|
|
&o->internal.result,
|
|
o->merge, bit & dirmask);
|
|
}
|
|
|
|
if (o->merge) {
|
|
int rc = call_unpack_fn((const struct cache_entry * const *)src,
|
|
o);
|
|
for (i = 0; i < n; i++) {
|
|
struct cache_entry *ce = src[i + o->merge];
|
|
if (ce != o->df_conflict_entry)
|
|
discard_cache_entry(ce);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
for (i = 0; i < n; i++)
|
|
if (src[i] && src[i] != o->df_conflict_entry)
|
|
if (do_add_entry(o, src[i], 0, 0))
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int unpack_failed(struct unpack_trees_options *o, const char *message)
|
|
{
|
|
discard_index(&o->internal.result);
|
|
if (!o->quiet && !o->exiting_early) {
|
|
if (message)
|
|
return error("%s", message);
|
|
return -1;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* The tree traversal is looking at name p. If we have a matching entry,
|
|
* return it. If name p is a directory in the index, do not return
|
|
* anything, as we will want to match it when the traversal descends into
|
|
* the directory.
|
|
*/
|
|
static int find_cache_pos(struct traverse_info *info,
|
|
const char *p, size_t p_len)
|
|
{
|
|
int pos;
|
|
struct unpack_trees_options *o = info->data;
|
|
struct index_state *index = o->src_index;
|
|
int pfxlen = info->pathlen;
|
|
|
|
for (pos = o->internal.cache_bottom; pos < index->cache_nr; pos++) {
|
|
const struct cache_entry *ce = index->cache[pos];
|
|
const char *ce_name, *ce_slash;
|
|
int cmp, ce_len;
|
|
|
|
if (ce->ce_flags & CE_UNPACKED) {
|
|
/*
|
|
* cache_bottom entry is already unpacked, so
|
|
* we can never match it; don't check it
|
|
* again.
|
|
*/
|
|
if (pos == o->internal.cache_bottom)
|
|
++o->internal.cache_bottom;
|
|
continue;
|
|
}
|
|
if (!ce_in_traverse_path(ce, info)) {
|
|
/*
|
|
* Check if we can skip future cache checks
|
|
* (because we're already past all possible
|
|
* entries in the traverse path).
|
|
*/
|
|
if (info->traverse_path) {
|
|
if (strncmp(ce->name, info->traverse_path,
|
|
info->pathlen) > 0)
|
|
break;
|
|
}
|
|
continue;
|
|
}
|
|
ce_name = ce->name + pfxlen;
|
|
ce_slash = strchr(ce_name, '/');
|
|
if (ce_slash)
|
|
ce_len = ce_slash - ce_name;
|
|
else
|
|
ce_len = ce_namelen(ce) - pfxlen;
|
|
cmp = name_compare(p, p_len, ce_name, ce_len);
|
|
/*
|
|
* Exact match; if we have a directory we need to
|
|
* delay returning it.
|
|
*/
|
|
if (!cmp)
|
|
return ce_slash ? -2 - pos : pos;
|
|
if (0 < cmp)
|
|
continue; /* keep looking */
|
|
/*
|
|
* ce_name sorts after p->path; could it be that we
|
|
* have files under p->path directory in the index?
|
|
* E.g. ce_name == "t-i", and p->path == "t"; we may
|
|
* have "t/a" in the index.
|
|
*/
|
|
if (p_len < ce_len && !memcmp(ce_name, p, p_len) &&
|
|
ce_name[p_len] < '/')
|
|
continue; /* keep looking */
|
|
break;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Given a sparse directory entry 'ce', compare ce->name to
|
|
* info->traverse_path + p->path + '/' if info->traverse_path
|
|
* is non-empty.
|
|
*
|
|
* Compare ce->name to p->path + '/' otherwise. Note that
|
|
* ce->name must end in a trailing '/' because it is a sparse
|
|
* directory entry.
|
|
*/
|
|
static int sparse_dir_matches_path(const struct cache_entry *ce,
|
|
struct traverse_info *info,
|
|
const struct name_entry *p)
|
|
{
|
|
assert(S_ISSPARSEDIR(ce->ce_mode));
|
|
assert(ce->name[ce->ce_namelen - 1] == '/');
|
|
|
|
if (info->pathlen)
|
|
return ce->ce_namelen == info->pathlen + p->pathlen + 1 &&
|
|
ce->name[info->pathlen - 1] == '/' &&
|
|
!strncmp(ce->name, info->traverse_path, info->pathlen) &&
|
|
!strncmp(ce->name + info->pathlen, p->path, p->pathlen);
|
|
return ce->ce_namelen == p->pathlen + 1 &&
|
|
!strncmp(ce->name, p->path, p->pathlen);
|
|
}
|
|
|
|
static struct cache_entry *find_cache_entry(struct traverse_info *info,
|
|
const struct name_entry *p)
|
|
{
|
|
const char *path;
|
|
int pos = find_cache_pos(info, p->path, p->pathlen);
|
|
struct unpack_trees_options *o = info->data;
|
|
|
|
if (0 <= pos)
|
|
return o->src_index->cache[pos];
|
|
|
|
/*
|
|
* Check for a sparse-directory entry named "path/".
|
|
* Due to the input p->path not having a trailing
|
|
* slash, the negative 'pos' value overshoots the
|
|
* expected position, hence "-2" instead of "-1".
|
|
*/
|
|
pos = -pos - 2;
|
|
|
|
if (pos < 0 || pos >= o->src_index->cache_nr)
|
|
return NULL;
|
|
|
|
/*
|
|
* Due to lexicographic sorting and sparse directory
|
|
* entries ending with a trailing slash, our path as a
|
|
* sparse directory (e.g "subdir/") and our path as a
|
|
* file (e.g. "subdir") might be separated by other
|
|
* paths (e.g. "subdir-").
|
|
*/
|
|
while (pos >= 0) {
|
|
struct cache_entry *ce = o->src_index->cache[pos];
|
|
|
|
if (!skip_prefix(ce->name, info->traverse_path, &path) ||
|
|
strncmp(path, p->path, p->pathlen) ||
|
|
path[p->pathlen] != '/')
|
|
return NULL;
|
|
|
|
if (S_ISSPARSEDIR(ce->ce_mode) &&
|
|
sparse_dir_matches_path(ce, info, p))
|
|
return ce;
|
|
|
|
pos--;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void debug_path(struct traverse_info *info)
|
|
{
|
|
if (info->prev) {
|
|
debug_path(info->prev);
|
|
if (*info->prev->name)
|
|
putchar('/');
|
|
}
|
|
printf("%s", info->name);
|
|
}
|
|
|
|
static void debug_name_entry(int i, struct name_entry *n)
|
|
{
|
|
printf("ent#%d %06o %s\n", i,
|
|
n->path ? n->mode : 0,
|
|
n->path ? n->path : "(missing)");
|
|
}
|
|
|
|
static void debug_unpack_callback(int n,
|
|
unsigned long mask,
|
|
unsigned long dirmask,
|
|
struct name_entry *names,
|
|
struct traverse_info *info)
|
|
{
|
|
int i;
|
|
printf("* unpack mask %lu, dirmask %lu, cnt %d ",
|
|
mask, dirmask, n);
|
|
debug_path(info);
|
|
putchar('\n');
|
|
for (i = 0; i < n; i++)
|
|
debug_name_entry(i, names + i);
|
|
}
|
|
|
|
/*
|
|
* Returns true if and only if the given cache_entry is a
|
|
* sparse-directory entry that matches the given name_entry
|
|
* from the tree walk at the given traverse_info.
|
|
*/
|
|
static int is_sparse_directory_entry(struct cache_entry *ce,
|
|
const struct name_entry *name,
|
|
struct traverse_info *info)
|
|
{
|
|
if (!ce || !name || !S_ISSPARSEDIR(ce->ce_mode))
|
|
return 0;
|
|
|
|
return sparse_dir_matches_path(ce, info, name);
|
|
}
|
|
|
|
static int unpack_sparse_callback(int n, unsigned long mask, unsigned long dirmask, struct name_entry *names, struct traverse_info *info)
|
|
{
|
|
struct cache_entry *src[MAX_UNPACK_TREES + 1] = { NULL, };
|
|
struct unpack_trees_options *o = info->data;
|
|
int ret, is_new_sparse_dir;
|
|
|
|
assert(o->merge);
|
|
|
|
/*
|
|
* Unlike in 'unpack_callback', where src[0] is derived from the index when
|
|
* merging, src[0] is a transient cache entry derived from the first tree
|
|
* provided. Create the temporary entry as if it came from a non-sparse index.
|
|
*/
|
|
if (!is_null_oid(&names[0].oid)) {
|
|
src[0] = create_ce_entry(info, &names[0], 0,
|
|
&o->internal.result, 1,
|
|
dirmask & (1ul << 0));
|
|
src[0]->ce_flags |= (CE_SKIP_WORKTREE | CE_NEW_SKIP_WORKTREE);
|
|
}
|
|
|
|
/*
|
|
* 'unpack_single_entry' assumes that src[0] is derived directly from
|
|
* the index, rather than from an entry in 'names'. This is *not* true when
|
|
* merging a sparse directory, in which case names[0] is the "index" source
|
|
* entry. To match the expectations of 'unpack_single_entry', shift past the
|
|
* "index" tree (i.e., names[0]) and adjust 'names', 'n', 'mask', and
|
|
* 'dirmask' accordingly.
|
|
*/
|
|
ret = unpack_single_entry(n - 1, mask >> 1, dirmask >> 1, src, names + 1, info, &is_new_sparse_dir);
|
|
|
|
if (src[0])
|
|
discard_cache_entry(src[0]);
|
|
|
|
return ret >= 0 ? mask : -1;
|
|
}
|
|
|
|
/*
|
|
* Note that traverse_by_cache_tree() duplicates some logic in this function
|
|
* without actually calling it. If you change the logic here you may need to
|
|
* check and change there as well.
|
|
*/
|
|
static int unpack_callback(int n, unsigned long mask, unsigned long dirmask, struct name_entry *names, struct traverse_info *info)
|
|
{
|
|
struct cache_entry *src[MAX_UNPACK_TREES + 1] = { NULL, };
|
|
struct unpack_trees_options *o = info->data;
|
|
const struct name_entry *p = names;
|
|
int is_new_sparse_dir;
|
|
|
|
/* Find first entry with a real name (we could use "mask" too) */
|
|
while (!p->mode)
|
|
p++;
|
|
|
|
if (o->internal.debug_unpack)
|
|
debug_unpack_callback(n, mask, dirmask, names, info);
|
|
|
|
/* Are we supposed to look at the index too? */
|
|
if (o->merge) {
|
|
while (1) {
|
|
int cmp;
|
|
struct cache_entry *ce;
|
|
|
|
if (o->diff_index_cached)
|
|
ce = next_cache_entry(o);
|
|
else
|
|
ce = find_cache_entry(info, p);
|
|
|
|
if (!ce)
|
|
break;
|
|
cmp = compare_entry(ce, info, p);
|
|
if (cmp < 0) {
|
|
if (unpack_index_entry(ce, o) < 0)
|
|
return unpack_failed(o, NULL);
|
|
continue;
|
|
}
|
|
if (!cmp) {
|
|
if (ce_stage(ce)) {
|
|
/*
|
|
* If we skip unmerged index
|
|
* entries, we'll skip this
|
|
* entry *and* the tree
|
|
* entries associated with it!
|
|
*/
|
|
if (o->skip_unmerged) {
|
|
add_same_unmerged(ce, o);
|
|
return mask;
|
|
}
|
|
}
|
|
src[0] = ce;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (unpack_single_entry(n, mask, dirmask, src, names, info, &is_new_sparse_dir))
|
|
return -1;
|
|
|
|
if (o->merge && src[0]) {
|
|
if (ce_stage(src[0]))
|
|
mark_ce_used_same_name(src[0], o);
|
|
else
|
|
mark_ce_used(src[0], o);
|
|
}
|
|
|
|
/* Now handle any directories.. */
|
|
if (dirmask) {
|
|
/* special case: "diff-index --cached" looking at a tree */
|
|
if (o->diff_index_cached &&
|
|
n == 1 && dirmask == 1 && S_ISDIR(names->mode)) {
|
|
int matches;
|
|
matches = cache_tree_matches_traversal(o->src_index->cache_tree,
|
|
names, info);
|
|
/*
|
|
* Everything under the name matches; skip the
|
|
* entire hierarchy. diff_index_cached codepath
|
|
* special cases D/F conflicts in such a way that
|
|
* it does not do any look-ahead, so this is safe.
|
|
*/
|
|
if (matches) {
|
|
/*
|
|
* Only increment the cache_bottom if the
|
|
* directory isn't a sparse directory index
|
|
* entry (if it is, it was already incremented)
|
|
* in 'mark_ce_used()'
|
|
*/
|
|
if (!src[0] || !S_ISSPARSEDIR(src[0]->ce_mode))
|
|
o->internal.cache_bottom += matches;
|
|
return mask;
|
|
}
|
|
}
|
|
|
|
if (!is_sparse_directory_entry(src[0], p, info) &&
|
|
!is_new_sparse_dir &&
|
|
traverse_trees_recursive(n, dirmask, mask & ~dirmask,
|
|
names, info) < 0) {
|
|
return -1;
|
|
}
|
|
|
|
return mask;
|
|
}
|
|
|
|
return mask;
|
|
}
|
|
|
|
static int clear_ce_flags_1(struct index_state *istate,
|
|
struct cache_entry **cache, int nr,
|
|
struct strbuf *prefix,
|
|
int select_mask, int clear_mask,
|
|
struct pattern_list *pl,
|
|
enum pattern_match_result default_match,
|
|
int progress_nr);
|
|
|
|
/* Whole directory matching */
|
|
static int clear_ce_flags_dir(struct index_state *istate,
|
|
struct cache_entry **cache, int nr,
|
|
struct strbuf *prefix,
|
|
char *basename,
|
|
int select_mask, int clear_mask,
|
|
struct pattern_list *pl,
|
|
enum pattern_match_result default_match,
|
|
int progress_nr)
|
|
{
|
|
struct cache_entry **cache_end;
|
|
int dtype = DT_DIR;
|
|
int rc;
|
|
enum pattern_match_result ret, orig_ret;
|
|
orig_ret = path_matches_pattern_list(prefix->buf, prefix->len,
|
|
basename, &dtype, pl, istate);
|
|
|
|
strbuf_addch(prefix, '/');
|
|
|
|
/* If undecided, use matching result of parent dir in defval */
|
|
if (orig_ret == UNDECIDED)
|
|
ret = default_match;
|
|
else
|
|
ret = orig_ret;
|
|
|
|
for (cache_end = cache; cache_end != cache + nr; cache_end++) {
|
|
struct cache_entry *ce = *cache_end;
|
|
if (strncmp(ce->name, prefix->buf, prefix->len))
|
|
break;
|
|
}
|
|
|
|
if (pl->use_cone_patterns && orig_ret == MATCHED_RECURSIVE) {
|
|
struct cache_entry **ce = cache;
|
|
rc = cache_end - cache;
|
|
|
|
while (ce < cache_end) {
|
|
(*ce)->ce_flags &= ~clear_mask;
|
|
ce++;
|
|
}
|
|
} else if (pl->use_cone_patterns && orig_ret == NOT_MATCHED) {
|
|
rc = cache_end - cache;
|
|
} else {
|
|
rc = clear_ce_flags_1(istate, cache, cache_end - cache,
|
|
prefix,
|
|
select_mask, clear_mask,
|
|
pl, ret,
|
|
progress_nr);
|
|
}
|
|
|
|
strbuf_setlen(prefix, prefix->len - 1);
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* Traverse the index, find every entry that matches according to
|
|
* o->pl. Do "ce_flags &= ~clear_mask" on those entries. Return the
|
|
* number of traversed entries.
|
|
*
|
|
* If select_mask is non-zero, only entries whose ce_flags has on of
|
|
* those bits enabled are traversed.
|
|
*
|
|
* cache : pointer to an index entry
|
|
* prefix_len : an offset to its path
|
|
*
|
|
* The current path ("prefix") including the trailing '/' is
|
|
* cache[0]->name[0..(prefix_len-1)]
|
|
* Top level path has prefix_len zero.
|
|
*/
|
|
static int clear_ce_flags_1(struct index_state *istate,
|
|
struct cache_entry **cache, int nr,
|
|
struct strbuf *prefix,
|
|
int select_mask, int clear_mask,
|
|
struct pattern_list *pl,
|
|
enum pattern_match_result default_match,
|
|
int progress_nr)
|
|
{
|
|
struct cache_entry **cache_end = nr ? cache + nr : cache;
|
|
|
|
/*
|
|
* Process all entries that have the given prefix and meet
|
|
* select_mask condition
|
|
*/
|
|
while(cache != cache_end) {
|
|
struct cache_entry *ce = *cache;
|
|
const char *name, *slash;
|
|
int len, dtype;
|
|
enum pattern_match_result ret;
|
|
|
|
display_progress(istate->progress, progress_nr);
|
|
|
|
if (select_mask && !(ce->ce_flags & select_mask)) {
|
|
cache++;
|
|
progress_nr++;
|
|
continue;
|
|
}
|
|
|
|
if (prefix->len && strncmp(ce->name, prefix->buf, prefix->len))
|
|
break;
|
|
|
|
name = ce->name + prefix->len;
|
|
slash = strchr(name, '/');
|
|
|
|
/* If it's a directory, try whole directory match first */
|
|
if (slash) {
|
|
int processed;
|
|
|
|
len = slash - name;
|
|
strbuf_add(prefix, name, len);
|
|
|
|
processed = clear_ce_flags_dir(istate, cache, cache_end - cache,
|
|
prefix,
|
|
prefix->buf + prefix->len - len,
|
|
select_mask, clear_mask,
|
|
pl, default_match,
|
|
progress_nr);
|
|
|
|
/* clear_c_f_dir eats a whole dir already? */
|
|
if (processed) {
|
|
cache += processed;
|
|
progress_nr += processed;
|
|
strbuf_setlen(prefix, prefix->len - len);
|
|
continue;
|
|
}
|
|
|
|
strbuf_addch(prefix, '/');
|
|
processed = clear_ce_flags_1(istate, cache, cache_end - cache,
|
|
prefix,
|
|
select_mask, clear_mask, pl,
|
|
default_match, progress_nr);
|
|
|
|
cache += processed;
|
|
progress_nr += processed;
|
|
|
|
strbuf_setlen(prefix, prefix->len - len - 1);
|
|
continue;
|
|
}
|
|
|
|
/* Non-directory */
|
|
dtype = ce_to_dtype(ce);
|
|
ret = path_matches_pattern_list(ce->name,
|
|
ce_namelen(ce),
|
|
name, &dtype, pl, istate);
|
|
if (ret == UNDECIDED)
|
|
ret = default_match;
|
|
if (ret == MATCHED || ret == MATCHED_RECURSIVE)
|
|
ce->ce_flags &= ~clear_mask;
|
|
cache++;
|
|
progress_nr++;
|
|
}
|
|
|
|
display_progress(istate->progress, progress_nr);
|
|
return nr - (cache_end - cache);
|
|
}
|
|
|
|
static int clear_ce_flags(struct index_state *istate,
|
|
int select_mask, int clear_mask,
|
|
struct pattern_list *pl,
|
|
int show_progress)
|
|
{
|
|
static struct strbuf prefix = STRBUF_INIT;
|
|
char label[100];
|
|
int rval;
|
|
|
|
strbuf_reset(&prefix);
|
|
if (show_progress)
|
|
istate->progress = start_delayed_progress(
|
|
_("Updating index flags"),
|
|
istate->cache_nr);
|
|
|
|
xsnprintf(label, sizeof(label), "clear_ce_flags(0x%08lx,0x%08lx)",
|
|
(unsigned long)select_mask, (unsigned long)clear_mask);
|
|
trace2_region_enter("unpack_trees", label, the_repository);
|
|
rval = clear_ce_flags_1(istate,
|
|
istate->cache,
|
|
istate->cache_nr,
|
|
&prefix,
|
|
select_mask, clear_mask,
|
|
pl, 0, 0);
|
|
trace2_region_leave("unpack_trees", label, the_repository);
|
|
|
|
stop_progress(&istate->progress);
|
|
return rval;
|
|
}
|
|
|
|
/*
|
|
* Set/Clear CE_NEW_SKIP_WORKTREE according to $GIT_DIR/info/sparse-checkout
|
|
*/
|
|
static void mark_new_skip_worktree(struct pattern_list *pl,
|
|
struct index_state *istate,
|
|
int select_flag, int skip_wt_flag,
|
|
int show_progress)
|
|
{
|
|
int i;
|
|
|
|
/*
|
|
* 1. Pretend the narrowest worktree: only unmerged entries
|
|
* are checked out
|
|
*/
|
|
for (i = 0; i < istate->cache_nr; i++) {
|
|
struct cache_entry *ce = istate->cache[i];
|
|
|
|
if (select_flag && !(ce->ce_flags & select_flag))
|
|
continue;
|
|
|
|
if (!ce_stage(ce) && !(ce->ce_flags & CE_CONFLICTED))
|
|
ce->ce_flags |= skip_wt_flag;
|
|
else
|
|
ce->ce_flags &= ~skip_wt_flag;
|
|
}
|
|
|
|
/*
|
|
* 2. Widen worktree according to sparse-checkout file.
|
|
* Matched entries will have skip_wt_flag cleared (i.e. "in")
|
|
*/
|
|
clear_ce_flags(istate, select_flag, skip_wt_flag, pl, show_progress);
|
|
}
|
|
|
|
static void populate_from_existing_patterns(struct unpack_trees_options *o,
|
|
struct pattern_list *pl)
|
|
{
|
|
if (get_sparse_checkout_patterns(pl) < 0)
|
|
o->skip_sparse_checkout = 1;
|
|
else
|
|
o->internal.pl = pl;
|
|
}
|
|
|
|
static void update_sparsity_for_prefix(const char *prefix,
|
|
struct index_state *istate)
|
|
{
|
|
int prefix_len = strlen(prefix);
|
|
struct strbuf ce_prefix = STRBUF_INIT;
|
|
|
|
if (!istate->sparse_index)
|
|
return;
|
|
|
|
while (prefix_len > 0 && prefix[prefix_len - 1] == '/')
|
|
prefix_len--;
|
|
|
|
if (prefix_len <= 0)
|
|
BUG("Invalid prefix passed to update_sparsity_for_prefix");
|
|
|
|
strbuf_grow(&ce_prefix, prefix_len + 1);
|
|
strbuf_add(&ce_prefix, prefix, prefix_len);
|
|
strbuf_addch(&ce_prefix, '/');
|
|
|
|
/*
|
|
* If the prefix points to a sparse directory or a path inside a sparse
|
|
* directory, the index should be expanded. This is accomplished in one
|
|
* of two ways:
|
|
* - if the prefix is inside a sparse directory, it will be expanded by
|
|
* the 'ensure_full_index(...)' call in 'index_name_pos(...)'.
|
|
* - if the prefix matches an existing sparse directory entry,
|
|
* 'index_name_pos(...)' will return its index position, triggering
|
|
* the 'ensure_full_index(...)' below.
|
|
*/
|
|
if (!path_in_cone_mode_sparse_checkout(ce_prefix.buf, istate) &&
|
|
index_name_pos(istate, ce_prefix.buf, ce_prefix.len) >= 0)
|
|
ensure_full_index(istate);
|
|
|
|
strbuf_release(&ce_prefix);
|
|
}
|
|
|
|
static int verify_absent(const struct cache_entry *,
|
|
enum unpack_trees_error_types,
|
|
struct unpack_trees_options *);
|
|
/*
|
|
* N-way merge "len" trees. Returns 0 on success, -1 on failure to manipulate the
|
|
* resulting index, -2 on failure to reflect the changes to the work tree.
|
|
*
|
|
* CE_ADDED, CE_UNPACKED and CE_NEW_SKIP_WORKTREE are used internally
|
|
*/
|
|
int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options *o)
|
|
{
|
|
struct repository *repo = the_repository;
|
|
int i, ret;
|
|
static struct cache_entry *dfc;
|
|
struct pattern_list pl;
|
|
int free_pattern_list = 0;
|
|
struct dir_struct dir = DIR_INIT;
|
|
|
|
if (o->reset == UNPACK_RESET_INVALID)
|
|
BUG("o->reset had a value of 1; should be UNPACK_TREES_*_UNTRACKED");
|
|
|
|
if (len > MAX_UNPACK_TREES)
|
|
die("unpack_trees takes at most %d trees", MAX_UNPACK_TREES);
|
|
if (o->internal.dir)
|
|
BUG("o->internal.dir is for internal use only");
|
|
if (o->internal.pl)
|
|
BUG("o->internal.pl is for internal use only");
|
|
if (o->df_conflict_entry)
|
|
BUG("o->df_conflict_entry is an output only field");
|
|
|
|
trace_performance_enter();
|
|
trace2_region_enter("unpack_trees", "unpack_trees", the_repository);
|
|
|
|
prepare_repo_settings(repo);
|
|
if (repo->settings.command_requires_full_index) {
|
|
ensure_full_index(o->src_index);
|
|
if (o->dst_index)
|
|
ensure_full_index(o->dst_index);
|
|
}
|
|
|
|
if (o->reset == UNPACK_RESET_OVERWRITE_UNTRACKED &&
|
|
o->preserve_ignored)
|
|
BUG("UNPACK_RESET_OVERWRITE_UNTRACKED incompatible with preserved ignored files");
|
|
|
|
if (!o->preserve_ignored) {
|
|
o->internal.dir = &dir;
|
|
o->internal.dir->flags |= DIR_SHOW_IGNORED;
|
|
setup_standard_excludes(o->internal.dir);
|
|
}
|
|
|
|
if (o->prefix)
|
|
update_sparsity_for_prefix(o->prefix, o->src_index);
|
|
|
|
if (!core_apply_sparse_checkout || !o->update)
|
|
o->skip_sparse_checkout = 1;
|
|
if (!o->skip_sparse_checkout) {
|
|
memset(&pl, 0, sizeof(pl));
|
|
free_pattern_list = 1;
|
|
populate_from_existing_patterns(o, &pl);
|
|
}
|
|
|
|
index_state_init(&o->internal.result, o->src_index->repo);
|
|
o->internal.result.initialized = 1;
|
|
o->internal.result.timestamp.sec = o->src_index->timestamp.sec;
|
|
o->internal.result.timestamp.nsec = o->src_index->timestamp.nsec;
|
|
o->internal.result.version = o->src_index->version;
|
|
if (!o->src_index->split_index) {
|
|
o->internal.result.split_index = NULL;
|
|
} else if (o->src_index == o->dst_index) {
|
|
/*
|
|
* o->dst_index (and thus o->src_index) will be discarded
|
|
* and overwritten with o->internal.result at the end of
|
|
* this function, so just use src_index's split_index to
|
|
* avoid having to create a new one.
|
|
*/
|
|
o->internal.result.split_index = o->src_index->split_index;
|
|
if (o->src_index->cache_changed & SPLIT_INDEX_ORDERED)
|
|
o->internal.result.cache_changed |= SPLIT_INDEX_ORDERED;
|
|
o->internal.result.split_index->refcount++;
|
|
} else {
|
|
o->internal.result.split_index =
|
|
init_split_index(&o->internal.result);
|
|
}
|
|
oidcpy(&o->internal.result.oid, &o->src_index->oid);
|
|
o->internal.merge_size = len;
|
|
mark_all_ce_unused(o->src_index);
|
|
|
|
o->internal.result.fsmonitor_last_update =
|
|
xstrdup_or_null(o->src_index->fsmonitor_last_update);
|
|
o->internal.result.fsmonitor_has_run_once = o->src_index->fsmonitor_has_run_once;
|
|
|
|
if (!o->src_index->initialized &&
|
|
!repo->settings.command_requires_full_index &&
|
|
is_sparse_index_allowed(&o->internal.result, 0))
|
|
o->internal.result.sparse_index = 1;
|
|
|
|
/*
|
|
* Sparse checkout loop #1: set NEW_SKIP_WORKTREE on existing entries
|
|
*/
|
|
if (!o->skip_sparse_checkout)
|
|
mark_new_skip_worktree(o->internal.pl, o->src_index, 0,
|
|
CE_NEW_SKIP_WORKTREE, o->verbose_update);
|
|
|
|
if (!dfc)
|
|
dfc = xcalloc(1, cache_entry_size(0));
|
|
o->df_conflict_entry = dfc;
|
|
|
|
if (len) {
|
|
const char *prefix = o->prefix ? o->prefix : "";
|
|
struct traverse_info info;
|
|
|
|
setup_traverse_info(&info, prefix);
|
|
info.fn = unpack_callback;
|
|
info.data = o;
|
|
info.show_all_errors = o->internal.show_all_errors;
|
|
info.pathspec = o->pathspec;
|
|
|
|
if (o->prefix) {
|
|
/*
|
|
* Unpack existing index entries that sort before the
|
|
* prefix the tree is spliced into. Note that o->merge
|
|
* is always true in this case.
|
|
*/
|
|
while (1) {
|
|
struct cache_entry *ce = next_cache_entry(o);
|
|
if (!ce)
|
|
break;
|
|
if (ce_in_traverse_path(ce, &info))
|
|
break;
|
|
if (unpack_index_entry(ce, o) < 0)
|
|
goto return_failed;
|
|
}
|
|
}
|
|
|
|
trace_performance_enter();
|
|
trace2_region_enter("unpack_trees", "traverse_trees", the_repository);
|
|
ret = traverse_trees(o->src_index, len, t, &info);
|
|
trace2_region_leave("unpack_trees", "traverse_trees", the_repository);
|
|
trace_performance_leave("traverse_trees");
|
|
if (ret < 0)
|
|
goto return_failed;
|
|
}
|
|
|
|
/* Any left-over entries in the index? */
|
|
if (o->merge) {
|
|
while (1) {
|
|
struct cache_entry *ce = next_cache_entry(o);
|
|
if (!ce)
|
|
break;
|
|
if (unpack_index_entry(ce, o) < 0)
|
|
goto return_failed;
|
|
}
|
|
}
|
|
mark_all_ce_unused(o->src_index);
|
|
|
|
if (o->trivial_merges_only && o->internal.nontrivial_merge) {
|
|
ret = unpack_failed(o, "Merge requires file-level merging");
|
|
goto done;
|
|
}
|
|
|
|
if (!o->skip_sparse_checkout) {
|
|
/*
|
|
* Sparse checkout loop #2: set NEW_SKIP_WORKTREE on entries not in loop #1
|
|
* If they will have NEW_SKIP_WORKTREE, also set CE_SKIP_WORKTREE
|
|
* so apply_sparse_checkout() won't attempt to remove it from worktree
|
|
*/
|
|
mark_new_skip_worktree(o->internal.pl, &o->internal.result,
|
|
CE_ADDED, CE_SKIP_WORKTREE | CE_NEW_SKIP_WORKTREE,
|
|
o->verbose_update);
|
|
|
|
ret = 0;
|
|
for (i = 0; i < o->internal.result.cache_nr; i++) {
|
|
struct cache_entry *ce = o->internal.result.cache[i];
|
|
|
|
/*
|
|
* Entries marked with CE_ADDED in merged_entry() do not have
|
|
* verify_absent() check (the check is effectively disabled
|
|
* because CE_NEW_SKIP_WORKTREE is set unconditionally).
|
|
*
|
|
* Do the real check now because we have had
|
|
* correct CE_NEW_SKIP_WORKTREE
|
|
*/
|
|
if (ce->ce_flags & CE_ADDED &&
|
|
verify_absent(ce, WARNING_SPARSE_ORPHANED_NOT_OVERWRITTEN, o))
|
|
ret = 1;
|
|
|
|
if (apply_sparse_checkout(&o->internal.result, ce, o))
|
|
ret = 1;
|
|
}
|
|
if (ret == 1) {
|
|
/*
|
|
* Inability to sparsify or de-sparsify individual
|
|
* paths is not an error, but just a warning.
|
|
*/
|
|
if (o->internal.show_all_errors)
|
|
display_warning_msgs(o);
|
|
ret = 0;
|
|
}
|
|
}
|
|
|
|
ret = check_updates(o, &o->internal.result) ? (-2) : 0;
|
|
if (o->dst_index) {
|
|
move_index_extensions(&o->internal.result, o->src_index);
|
|
if (!ret) {
|
|
if (git_env_bool("GIT_TEST_CHECK_CACHE_TREE", 0) &&
|
|
cache_tree_verify(the_repository,
|
|
&o->internal.result) < 0) {
|
|
ret = -1;
|
|
goto done;
|
|
}
|
|
|
|
if (!o->skip_cache_tree_update &&
|
|
!cache_tree_fully_valid(o->internal.result.cache_tree))
|
|
cache_tree_update(&o->internal.result,
|
|
WRITE_TREE_SILENT |
|
|
WRITE_TREE_REPAIR);
|
|
}
|
|
|
|
o->internal.result.updated_workdir = 1;
|
|
discard_index(o->dst_index);
|
|
*o->dst_index = o->internal.result;
|
|
memset(&o->internal.result, 0, sizeof(o->internal.result));
|
|
} else {
|
|
discard_index(&o->internal.result);
|
|
}
|
|
o->src_index = NULL;
|
|
|
|
done:
|
|
if (free_pattern_list)
|
|
clear_pattern_list(&pl);
|
|
if (o->internal.dir) {
|
|
dir_clear(o->internal.dir);
|
|
o->internal.dir = NULL;
|
|
}
|
|
trace2_region_leave("unpack_trees", "unpack_trees", the_repository);
|
|
trace_performance_leave("unpack_trees");
|
|
return ret;
|
|
|
|
return_failed:
|
|
if (o->internal.show_all_errors)
|
|
display_error_msgs(o);
|
|
mark_all_ce_unused(o->src_index);
|
|
ret = unpack_failed(o, NULL);
|
|
if (o->exiting_early)
|
|
ret = 0;
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* Update SKIP_WORKTREE bits according to sparsity patterns, and update
|
|
* working directory to match.
|
|
*
|
|
* CE_NEW_SKIP_WORKTREE is used internally.
|
|
*/
|
|
enum update_sparsity_result update_sparsity(struct unpack_trees_options *o,
|
|
struct pattern_list *pl)
|
|
{
|
|
enum update_sparsity_result ret = UPDATE_SPARSITY_SUCCESS;
|
|
int i;
|
|
unsigned old_show_all_errors;
|
|
int free_pattern_list = 0;
|
|
|
|
old_show_all_errors = o->internal.show_all_errors;
|
|
o->internal.show_all_errors = 1;
|
|
index_state_init(&o->internal.result, o->src_index->repo);
|
|
|
|
/* Sanity checks */
|
|
if (!o->update || o->index_only || o->skip_sparse_checkout)
|
|
BUG("update_sparsity() is for reflecting sparsity patterns in working directory");
|
|
if (o->src_index != o->dst_index || o->fn)
|
|
BUG("update_sparsity() called wrong");
|
|
|
|
trace_performance_enter();
|
|
|
|
/* If we weren't given patterns, use the recorded ones */
|
|
if (!pl) {
|
|
free_pattern_list = 1;
|
|
pl = xcalloc(1, sizeof(*pl));
|
|
populate_from_existing_patterns(o, pl);
|
|
}
|
|
o->internal.pl = pl;
|
|
|
|
/* Expand sparse directories as needed */
|
|
expand_index(o->src_index, o->internal.pl);
|
|
|
|
/* Set NEW_SKIP_WORKTREE on existing entries. */
|
|
mark_all_ce_unused(o->src_index);
|
|
mark_new_skip_worktree(o->internal.pl, o->src_index, 0,
|
|
CE_NEW_SKIP_WORKTREE, o->verbose_update);
|
|
|
|
/* Then loop over entries and update/remove as needed */
|
|
ret = UPDATE_SPARSITY_SUCCESS;
|
|
for (i = 0; i < o->src_index->cache_nr; i++) {
|
|
struct cache_entry *ce = o->src_index->cache[i];
|
|
|
|
|
|
if (ce_stage(ce)) {
|
|
/* -1 because for loop will increment by 1 */
|
|
i += warn_conflicted_path(o->src_index, i, o) - 1;
|
|
ret = UPDATE_SPARSITY_WARNINGS;
|
|
continue;
|
|
}
|
|
|
|
if (apply_sparse_checkout(o->src_index, ce, o))
|
|
ret = UPDATE_SPARSITY_WARNINGS;
|
|
}
|
|
|
|
if (check_updates(o, o->src_index))
|
|
ret = UPDATE_SPARSITY_WORKTREE_UPDATE_FAILURES;
|
|
|
|
display_warning_msgs(o);
|
|
o->internal.show_all_errors = old_show_all_errors;
|
|
if (free_pattern_list) {
|
|
clear_pattern_list(pl);
|
|
free(pl);
|
|
o->internal.pl = NULL;
|
|
}
|
|
trace_performance_leave("update_sparsity");
|
|
return ret;
|
|
}
|
|
|
|
/* Here come the merge functions */
|
|
|
|
static int reject_merge(const struct cache_entry *ce,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
return add_rejected_path(o, ERROR_WOULD_OVERWRITE, ce->name);
|
|
}
|
|
|
|
static int same(const struct cache_entry *a, const struct cache_entry *b)
|
|
{
|
|
if (!!a != !!b)
|
|
return 0;
|
|
if (!a && !b)
|
|
return 1;
|
|
if ((a->ce_flags | b->ce_flags) & CE_CONFLICTED)
|
|
return 0;
|
|
return a->ce_mode == b->ce_mode &&
|
|
oideq(&a->oid, &b->oid);
|
|
}
|
|
|
|
|
|
/*
|
|
* When a CE gets turned into an unmerged entry, we
|
|
* want it to be up-to-date
|
|
*/
|
|
static int verify_uptodate_1(const struct cache_entry *ce,
|
|
struct unpack_trees_options *o,
|
|
enum unpack_trees_error_types error_type)
|
|
{
|
|
struct stat st;
|
|
|
|
if (o->index_only)
|
|
return 0;
|
|
|
|
/*
|
|
* CE_VALID and CE_SKIP_WORKTREE cheat, we better check again
|
|
* if this entry is truly up-to-date because this file may be
|
|
* overwritten.
|
|
*/
|
|
if ((ce->ce_flags & CE_VALID) || ce_skip_worktree(ce))
|
|
; /* keep checking */
|
|
else if (o->reset || ce_uptodate(ce))
|
|
return 0;
|
|
|
|
if (!lstat(ce->name, &st)) {
|
|
int flags = CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE;
|
|
unsigned changed = ie_match_stat(o->src_index, ce, &st, flags);
|
|
|
|
if (submodule_from_ce(ce)) {
|
|
int r = check_submodule_move_head(ce,
|
|
"HEAD", oid_to_hex(&ce->oid), o);
|
|
if (r)
|
|
return add_rejected_path(o, error_type, ce->name);
|
|
return 0;
|
|
}
|
|
|
|
if (!changed)
|
|
return 0;
|
|
/*
|
|
* Historic default policy was to allow submodule to be out
|
|
* of sync wrt the superproject index. If the submodule was
|
|
* not considered interesting above, we don't care here.
|
|
*/
|
|
if (S_ISGITLINK(ce->ce_mode))
|
|
return 0;
|
|
|
|
errno = 0;
|
|
}
|
|
if (errno == ENOENT)
|
|
return 0;
|
|
return add_rejected_path(o, error_type, ce->name);
|
|
}
|
|
|
|
int verify_uptodate(const struct cache_entry *ce,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
if (!o->skip_sparse_checkout &&
|
|
(ce->ce_flags & CE_SKIP_WORKTREE) &&
|
|
(ce->ce_flags & CE_NEW_SKIP_WORKTREE))
|
|
return 0;
|
|
return verify_uptodate_1(ce, o, ERROR_NOT_UPTODATE_FILE);
|
|
}
|
|
|
|
static int verify_uptodate_sparse(const struct cache_entry *ce,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
return verify_uptodate_1(ce, o, WARNING_SPARSE_NOT_UPTODATE_FILE);
|
|
}
|
|
|
|
/*
|
|
* TODO: We should actually invalidate o->internal.result, not src_index [1].
|
|
* But since cache tree and untracked cache both are not copied to
|
|
* o->internal.result until unpacking is complete, we invalidate them on
|
|
* src_index instead with the assumption that they will be copied to
|
|
* dst_index at the end.
|
|
*
|
|
* [1] src_index->cache_tree is also used in unpack_callback() so if
|
|
* we invalidate o->internal.result, we need to update it to use
|
|
* o->internal.result.cache_tree as well.
|
|
*/
|
|
static void invalidate_ce_path(const struct cache_entry *ce,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
if (!ce)
|
|
return;
|
|
cache_tree_invalidate_path(o->src_index, ce->name);
|
|
untracked_cache_invalidate_path(o->src_index, ce->name, 1);
|
|
}
|
|
|
|
/*
|
|
* Check that checking out ce->sha1 in subdir ce->name is not
|
|
* going to overwrite any working files.
|
|
*/
|
|
static int verify_clean_submodule(const char *old_sha1,
|
|
const struct cache_entry *ce,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
if (!submodule_from_ce(ce))
|
|
return 0;
|
|
|
|
return check_submodule_move_head(ce, old_sha1,
|
|
oid_to_hex(&ce->oid), o);
|
|
}
|
|
|
|
static int verify_clean_subdirectory(const struct cache_entry *ce,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
/*
|
|
* we are about to extract "ce->name"; we would not want to lose
|
|
* anything in the existing directory there.
|
|
*/
|
|
int namelen;
|
|
int i;
|
|
struct dir_struct d;
|
|
char *pathbuf;
|
|
int cnt = 0;
|
|
|
|
if (S_ISGITLINK(ce->ce_mode)) {
|
|
struct object_id oid;
|
|
int sub_head = repo_resolve_gitlink_ref(the_repository, ce->name,
|
|
"HEAD", &oid);
|
|
/*
|
|
* If we are not going to update the submodule, then
|
|
* we don't care.
|
|
*/
|
|
if (!sub_head && oideq(&oid, &ce->oid))
|
|
return 0;
|
|
return verify_clean_submodule(sub_head ? NULL : oid_to_hex(&oid),
|
|
ce, o);
|
|
}
|
|
|
|
/*
|
|
* First let's make sure we do not have a local modification
|
|
* in that directory.
|
|
*/
|
|
namelen = ce_namelen(ce);
|
|
for (i = locate_in_src_index(ce, o);
|
|
i < o->src_index->cache_nr;
|
|
i++) {
|
|
struct cache_entry *ce2 = o->src_index->cache[i];
|
|
int len = ce_namelen(ce2);
|
|
if (len < namelen ||
|
|
strncmp(ce->name, ce2->name, namelen) ||
|
|
ce2->name[namelen] != '/')
|
|
break;
|
|
/*
|
|
* ce2->name is an entry in the subdirectory to be
|
|
* removed.
|
|
*/
|
|
if (!ce_stage(ce2)) {
|
|
if (verify_uptodate(ce2, o))
|
|
return -1;
|
|
add_entry(o, ce2, CE_REMOVE, 0);
|
|
invalidate_ce_path(ce, o);
|
|
mark_ce_used(ce2, o);
|
|
}
|
|
cnt++;
|
|
}
|
|
|
|
/* Do not lose a locally present file that is not ignored. */
|
|
pathbuf = xstrfmt("%.*s/", namelen, ce->name);
|
|
|
|
memset(&d, 0, sizeof(d));
|
|
if (o->internal.dir)
|
|
setup_standard_excludes(&d);
|
|
i = read_directory(&d, o->src_index, pathbuf, namelen+1, NULL);
|
|
dir_clear(&d);
|
|
free(pathbuf);
|
|
if (i)
|
|
return add_rejected_path(o, ERROR_NOT_UPTODATE_DIR, ce->name);
|
|
|
|
/* Do not lose startup_info->original_cwd */
|
|
if (startup_info->original_cwd &&
|
|
!strcmp(startup_info->original_cwd, ce->name))
|
|
return add_rejected_path(o, ERROR_CWD_IN_THE_WAY, ce->name);
|
|
|
|
return cnt;
|
|
}
|
|
|
|
/*
|
|
* This gets called when there was no index entry for the tree entry 'dst',
|
|
* but we found a file in the working tree that 'lstat()' said was fine,
|
|
* and we're on a case-insensitive filesystem.
|
|
*
|
|
* See if we can find a case-insensitive match in the index that also
|
|
* matches the stat information, and assume it's that other file!
|
|
*/
|
|
static int icase_exists(struct unpack_trees_options *o, const char *name, int len, struct stat *st)
|
|
{
|
|
const struct cache_entry *src;
|
|
|
|
src = index_file_exists(o->src_index, name, len, 1);
|
|
return src && !ie_match_stat(o->src_index, src, st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE);
|
|
}
|
|
|
|
enum absent_checking_type {
|
|
COMPLETELY_ABSENT,
|
|
ABSENT_ANY_DIRECTORY
|
|
};
|
|
|
|
static int check_ok_to_remove(const char *name, int len, int dtype,
|
|
const struct cache_entry *ce, struct stat *st,
|
|
enum unpack_trees_error_types error_type,
|
|
enum absent_checking_type absent_type,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
const struct cache_entry *result;
|
|
|
|
/*
|
|
* It may be that the 'lstat()' succeeded even though
|
|
* target 'ce' was absent, because there is an old
|
|
* entry that is different only in case..
|
|
*
|
|
* Ignore that lstat() if it matches.
|
|
*/
|
|
if (ignore_case && icase_exists(o, name, len, st))
|
|
return 0;
|
|
|
|
if (o->internal.dir &&
|
|
is_excluded(o->internal.dir, o->src_index, name, &dtype))
|
|
/*
|
|
* ce->name is explicitly excluded, so it is Ok to
|
|
* overwrite it.
|
|
*/
|
|
return 0;
|
|
if (S_ISDIR(st->st_mode)) {
|
|
/*
|
|
* We are checking out path "foo" and
|
|
* found "foo/." in the working tree.
|
|
* This is tricky -- if we have modified
|
|
* files that are in "foo/" we would lose
|
|
* them.
|
|
*/
|
|
if (verify_clean_subdirectory(ce, o) < 0)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
/* If we only care about directories, then we can remove */
|
|
if (absent_type == ABSENT_ANY_DIRECTORY)
|
|
return 0;
|
|
|
|
/*
|
|
* The previous round may already have decided to
|
|
* delete this path, which is in a subdirectory that
|
|
* is being replaced with a blob.
|
|
*/
|
|
result = index_file_exists(&o->internal.result, name, len, 0);
|
|
if (result) {
|
|
if (result->ce_flags & CE_REMOVE)
|
|
return 0;
|
|
}
|
|
|
|
return add_rejected_path(o, error_type, name);
|
|
}
|
|
|
|
/*
|
|
* We do not want to remove or overwrite a working tree file that
|
|
* is not tracked, unless it is ignored.
|
|
*/
|
|
static int verify_absent_1(const struct cache_entry *ce,
|
|
enum unpack_trees_error_types error_type,
|
|
enum absent_checking_type absent_type,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
int len;
|
|
struct stat st;
|
|
|
|
if (o->index_only || !o->update)
|
|
return 0;
|
|
|
|
if (o->reset == UNPACK_RESET_OVERWRITE_UNTRACKED) {
|
|
/* Avoid nuking startup_info->original_cwd... */
|
|
if (startup_info->original_cwd &&
|
|
!strcmp(startup_info->original_cwd, ce->name))
|
|
return add_rejected_path(o, ERROR_CWD_IN_THE_WAY,
|
|
ce->name);
|
|
/* ...but nuke anything else. */
|
|
return 0;
|
|
}
|
|
|
|
len = check_leading_path(ce->name, ce_namelen(ce), 0);
|
|
if (!len)
|
|
return 0;
|
|
else if (len > 0) {
|
|
char *path;
|
|
int ret;
|
|
|
|
path = xmemdupz(ce->name, len);
|
|
if (lstat(path, &st))
|
|
ret = error_errno("cannot stat '%s'", path);
|
|
else {
|
|
if (submodule_from_ce(ce))
|
|
ret = check_submodule_move_head(ce,
|
|
oid_to_hex(&ce->oid),
|
|
NULL, o);
|
|
else
|
|
ret = check_ok_to_remove(path, len, DT_UNKNOWN, NULL,
|
|
&st, error_type,
|
|
absent_type, o);
|
|
}
|
|
free(path);
|
|
return ret;
|
|
} else if (lstat(ce->name, &st)) {
|
|
if (errno != ENOENT)
|
|
return error_errno("cannot stat '%s'", ce->name);
|
|
return 0;
|
|
} else {
|
|
if (submodule_from_ce(ce))
|
|
return check_submodule_move_head(ce, oid_to_hex(&ce->oid),
|
|
NULL, o);
|
|
|
|
return check_ok_to_remove(ce->name, ce_namelen(ce),
|
|
ce_to_dtype(ce), ce, &st,
|
|
error_type, absent_type, o);
|
|
}
|
|
}
|
|
|
|
static int verify_absent(const struct cache_entry *ce,
|
|
enum unpack_trees_error_types error_type,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
if (!o->skip_sparse_checkout && (ce->ce_flags & CE_NEW_SKIP_WORKTREE))
|
|
return 0;
|
|
return verify_absent_1(ce, error_type, COMPLETELY_ABSENT, o);
|
|
}
|
|
|
|
static int verify_absent_if_directory(const struct cache_entry *ce,
|
|
enum unpack_trees_error_types error_type,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
if (!o->skip_sparse_checkout && (ce->ce_flags & CE_NEW_SKIP_WORKTREE))
|
|
return 0;
|
|
return verify_absent_1(ce, error_type, ABSENT_ANY_DIRECTORY, o);
|
|
}
|
|
|
|
static int verify_absent_sparse(const struct cache_entry *ce,
|
|
enum unpack_trees_error_types error_type,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
return verify_absent_1(ce, error_type, COMPLETELY_ABSENT, o);
|
|
}
|
|
|
|
static int merged_entry(const struct cache_entry *ce,
|
|
const struct cache_entry *old,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
int update = CE_UPDATE;
|
|
struct cache_entry *merge = dup_cache_entry(ce, &o->internal.result);
|
|
|
|
if (!old) {
|
|
/*
|
|
* New index entries. In sparse checkout, the following
|
|
* verify_absent() will be delayed until after
|
|
* traverse_trees() finishes in unpack_trees(), then:
|
|
*
|
|
* - CE_NEW_SKIP_WORKTREE will be computed correctly
|
|
* - verify_absent() be called again, this time with
|
|
* correct CE_NEW_SKIP_WORKTREE
|
|
*
|
|
* verify_absent() call here does nothing in sparse
|
|
* checkout (i.e. o->skip_sparse_checkout == 0)
|
|
*/
|
|
update |= CE_ADDED;
|
|
merge->ce_flags |= CE_NEW_SKIP_WORKTREE;
|
|
|
|
if (verify_absent(merge,
|
|
ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN, o)) {
|
|
discard_cache_entry(merge);
|
|
return -1;
|
|
}
|
|
invalidate_ce_path(merge, o);
|
|
|
|
if (submodule_from_ce(ce) && file_exists(ce->name)) {
|
|
int ret = check_submodule_move_head(ce, NULL,
|
|
oid_to_hex(&ce->oid),
|
|
o);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
} else if (!(old->ce_flags & CE_CONFLICTED)) {
|
|
/*
|
|
* See if we can re-use the old CE directly?
|
|
* That way we get the uptodate stat info.
|
|
*
|
|
* This also removes the UPDATE flag on a match; otherwise
|
|
* we will end up overwriting local changes in the work tree.
|
|
*/
|
|
if (same(old, merge)) {
|
|
copy_cache_entry(merge, old);
|
|
update = 0;
|
|
} else {
|
|
if (verify_uptodate(old, o)) {
|
|
discard_cache_entry(merge);
|
|
return -1;
|
|
}
|
|
/* Migrate old flags over */
|
|
update |= old->ce_flags & (CE_SKIP_WORKTREE | CE_NEW_SKIP_WORKTREE);
|
|
invalidate_ce_path(old, o);
|
|
}
|
|
|
|
if (submodule_from_ce(ce) && file_exists(ce->name)) {
|
|
int ret = check_submodule_move_head(ce, oid_to_hex(&old->oid),
|
|
oid_to_hex(&ce->oid),
|
|
o);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
} else {
|
|
/*
|
|
* Previously unmerged entry left as an existence
|
|
* marker by read_index_unmerged();
|
|
*/
|
|
if (verify_absent_if_directory(merge,
|
|
ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN, o)) {
|
|
discard_cache_entry(merge);
|
|
return -1;
|
|
}
|
|
|
|
invalidate_ce_path(old, o);
|
|
}
|
|
|
|
if (do_add_entry(o, merge, update, CE_STAGEMASK) < 0)
|
|
return -1;
|
|
return 1;
|
|
}
|
|
|
|
static int merged_sparse_dir(const struct cache_entry * const *src, int n,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
struct tree_desc t[MAX_UNPACK_TREES + 1];
|
|
void * tree_bufs[MAX_UNPACK_TREES + 1];
|
|
struct traverse_info info;
|
|
int i, ret;
|
|
|
|
/*
|
|
* Create the tree traversal information for traversing into *only* the
|
|
* sparse directory.
|
|
*/
|
|
setup_traverse_info(&info, src[0]->name);
|
|
info.fn = unpack_sparse_callback;
|
|
info.data = o;
|
|
info.show_all_errors = o->internal.show_all_errors;
|
|
info.pathspec = o->pathspec;
|
|
|
|
/* Get the tree descriptors of the sparse directory in each of the merging trees */
|
|
for (i = 0; i < n; i++)
|
|
tree_bufs[i] = fill_tree_descriptor(o->src_index->repo, &t[i],
|
|
src[i] && !is_null_oid(&src[i]->oid) ? &src[i]->oid : NULL);
|
|
|
|
ret = traverse_trees(o->src_index, n, t, &info);
|
|
|
|
for (i = 0; i < n; i++)
|
|
free(tree_bufs[i]);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int deleted_entry(const struct cache_entry *ce,
|
|
const struct cache_entry *old,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
/* Did it exist in the index? */
|
|
if (!old) {
|
|
if (verify_absent(ce, ERROR_WOULD_LOSE_UNTRACKED_REMOVED, o))
|
|
return -1;
|
|
return 0;
|
|
} else if (verify_absent_if_directory(ce, ERROR_WOULD_LOSE_UNTRACKED_REMOVED, o)) {
|
|
return -1;
|
|
}
|
|
|
|
if (!(old->ce_flags & CE_CONFLICTED) && verify_uptodate(old, o))
|
|
return -1;
|
|
add_entry(o, ce, CE_REMOVE, 0);
|
|
invalidate_ce_path(ce, o);
|
|
return 1;
|
|
}
|
|
|
|
static int keep_entry(const struct cache_entry *ce,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
add_entry(o, ce, 0, 0);
|
|
if (ce_stage(ce))
|
|
invalidate_ce_path(ce, o);
|
|
return 1;
|
|
}
|
|
|
|
#if DBRT_DEBUG
|
|
static void show_stage_entry(FILE *o,
|
|
const char *label, const struct cache_entry *ce)
|
|
{
|
|
if (!ce)
|
|
fprintf(o, "%s (missing)\n", label);
|
|
else
|
|
fprintf(o, "%s%06o %s %d\t%s\n",
|
|
label,
|
|
ce->ce_mode,
|
|
oid_to_hex(&ce->oid),
|
|
ce_stage(ce),
|
|
ce->name);
|
|
}
|
|
#endif
|
|
|
|
int threeway_merge(const struct cache_entry * const *stages,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
const struct cache_entry *index;
|
|
const struct cache_entry *head;
|
|
const struct cache_entry *remote = stages[o->head_idx + 1];
|
|
int count;
|
|
int head_match = 0;
|
|
int remote_match = 0;
|
|
|
|
int df_conflict_head = 0;
|
|
int df_conflict_remote = 0;
|
|
|
|
int any_anc_missing = 0;
|
|
int no_anc_exists = 1;
|
|
int i;
|
|
|
|
for (i = 1; i < o->head_idx; i++) {
|
|
if (!stages[i] || stages[i] == o->df_conflict_entry)
|
|
any_anc_missing = 1;
|
|
else
|
|
no_anc_exists = 0;
|
|
}
|
|
|
|
index = stages[0];
|
|
head = stages[o->head_idx];
|
|
|
|
if (head == o->df_conflict_entry) {
|
|
df_conflict_head = 1;
|
|
head = NULL;
|
|
}
|
|
|
|
if (remote == o->df_conflict_entry) {
|
|
df_conflict_remote = 1;
|
|
remote = NULL;
|
|
}
|
|
|
|
/*
|
|
* First, if there's a #16 situation, note that to prevent #13
|
|
* and #14.
|
|
*/
|
|
if (!same(remote, head)) {
|
|
for (i = 1; i < o->head_idx; i++) {
|
|
if (same(stages[i], head)) {
|
|
head_match = i;
|
|
}
|
|
if (same(stages[i], remote)) {
|
|
remote_match = i;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* We start with cases where the index is allowed to match
|
|
* something other than the head: #14(ALT) and #2ALT, where it
|
|
* is permitted to match the result instead.
|
|
*/
|
|
/* #14, #14ALT, #2ALT */
|
|
if (remote && !df_conflict_head && head_match && !remote_match) {
|
|
if (index && !same(index, remote) && !same(index, head)) {
|
|
if (S_ISSPARSEDIR(index->ce_mode))
|
|
return merged_sparse_dir(stages, 4, o);
|
|
else
|
|
return reject_merge(index, o);
|
|
}
|
|
return merged_entry(remote, index, o);
|
|
}
|
|
/*
|
|
* If we have an entry in the index cache, then we want to
|
|
* make sure that it matches head.
|
|
*/
|
|
if (index && !same(index, head)) {
|
|
if (S_ISSPARSEDIR(index->ce_mode))
|
|
return merged_sparse_dir(stages, 4, o);
|
|
else
|
|
return reject_merge(index, o);
|
|
}
|
|
|
|
if (head) {
|
|
/* #5ALT, #15 */
|
|
if (same(head, remote))
|
|
return merged_entry(head, index, o);
|
|
/* #13, #3ALT */
|
|
if (!df_conflict_remote && remote_match && !head_match)
|
|
return merged_entry(head, index, o);
|
|
}
|
|
|
|
/* #1 */
|
|
if (!head && !remote && any_anc_missing)
|
|
return 0;
|
|
|
|
/*
|
|
* Under the "aggressive" rule, we resolve mostly trivial
|
|
* cases that we historically had git-merge-one-file resolve.
|
|
*/
|
|
if (o->aggressive) {
|
|
int head_deleted = !head;
|
|
int remote_deleted = !remote;
|
|
const struct cache_entry *ce = NULL;
|
|
|
|
if (index)
|
|
ce = index;
|
|
else if (head)
|
|
ce = head;
|
|
else if (remote)
|
|
ce = remote;
|
|
else {
|
|
for (i = 1; i < o->head_idx; i++) {
|
|
if (stages[i] && stages[i] != o->df_conflict_entry) {
|
|
ce = stages[i];
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Deleted in both.
|
|
* Deleted in one and unchanged in the other.
|
|
*/
|
|
if ((head_deleted && remote_deleted) ||
|
|
(head_deleted && remote && remote_match) ||
|
|
(remote_deleted && head && head_match)) {
|
|
if (index)
|
|
return deleted_entry(index, index, o);
|
|
if (ce && !head_deleted) {
|
|
if (verify_absent(ce, ERROR_WOULD_LOSE_UNTRACKED_REMOVED, o))
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
/*
|
|
* Added in both, identically.
|
|
*/
|
|
if (no_anc_exists && head && remote && same(head, remote))
|
|
return merged_entry(head, index, o);
|
|
|
|
}
|
|
|
|
/* Handle "no merge" cases (see t/t1000-read-tree-m-3way.sh) */
|
|
if (index) {
|
|
/*
|
|
* If we've reached the "no merge" cases and we're merging
|
|
* a sparse directory, we may have an "edit/edit" conflict that
|
|
* can be resolved by individually merging directory contents.
|
|
*/
|
|
if (S_ISSPARSEDIR(index->ce_mode))
|
|
return merged_sparse_dir(stages, 4, o);
|
|
|
|
/*
|
|
* If we're not merging a sparse directory, ensure the index is
|
|
* up-to-date to avoid files getting overwritten with conflict
|
|
* resolution files
|
|
*/
|
|
if (verify_uptodate(index, o))
|
|
return -1;
|
|
}
|
|
|
|
o->internal.nontrivial_merge = 1;
|
|
|
|
/* #2, #3, #4, #6, #7, #9, #10, #11. */
|
|
count = 0;
|
|
if (!head_match || !remote_match) {
|
|
for (i = 1; i < o->head_idx; i++) {
|
|
if (stages[i] && stages[i] != o->df_conflict_entry) {
|
|
keep_entry(stages[i], o);
|
|
count++;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
#if DBRT_DEBUG
|
|
else {
|
|
fprintf(stderr, "read-tree: warning #16 detected\n");
|
|
show_stage_entry(stderr, "head ", stages[head_match]);
|
|
show_stage_entry(stderr, "remote ", stages[remote_match]);
|
|
}
|
|
#endif
|
|
if (head) { count += keep_entry(head, o); }
|
|
if (remote) { count += keep_entry(remote, o); }
|
|
return count;
|
|
}
|
|
|
|
/*
|
|
* Two-way merge.
|
|
*
|
|
* The rule is to "carry forward" what is in the index without losing
|
|
* information across a "fast-forward", favoring a successful merge
|
|
* over a merge failure when it makes sense. For details of the
|
|
* "carry forward" rule, please see <Documentation/git-read-tree.txt>.
|
|
*
|
|
*/
|
|
int twoway_merge(const struct cache_entry * const *src,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
const struct cache_entry *current = src[0];
|
|
const struct cache_entry *oldtree = src[1];
|
|
const struct cache_entry *newtree = src[2];
|
|
|
|
if (o->internal.merge_size != 2)
|
|
return error("Cannot do a twoway merge of %d trees",
|
|
o->internal.merge_size);
|
|
|
|
if (oldtree == o->df_conflict_entry)
|
|
oldtree = NULL;
|
|
if (newtree == o->df_conflict_entry)
|
|
newtree = NULL;
|
|
|
|
if (current) {
|
|
if (current->ce_flags & CE_CONFLICTED) {
|
|
if (same(oldtree, newtree) || o->reset) {
|
|
if (!newtree)
|
|
return deleted_entry(current, current, o);
|
|
else
|
|
return merged_entry(newtree, current, o);
|
|
}
|
|
return reject_merge(current, o);
|
|
} else if ((!oldtree && !newtree) || /* 4 and 5 */
|
|
(!oldtree && newtree &&
|
|
same(current, newtree)) || /* 6 and 7 */
|
|
(oldtree && newtree &&
|
|
same(oldtree, newtree)) || /* 14 and 15 */
|
|
(oldtree && newtree &&
|
|
!same(oldtree, newtree) && /* 18 and 19 */
|
|
same(current, newtree))) {
|
|
return keep_entry(current, o);
|
|
} else if (oldtree && !newtree && same(current, oldtree)) {
|
|
/* 10 or 11 */
|
|
return deleted_entry(oldtree, current, o);
|
|
} else if (oldtree && newtree &&
|
|
same(current, oldtree) && !same(current, newtree)) {
|
|
/* 20 or 21 */
|
|
return merged_entry(newtree, current, o);
|
|
} else if (current && !oldtree && newtree &&
|
|
S_ISSPARSEDIR(current->ce_mode) != S_ISSPARSEDIR(newtree->ce_mode) &&
|
|
ce_stage(current) == 0) {
|
|
/*
|
|
* This case is a directory/file conflict across the sparse-index
|
|
* boundary. When we are changing from one path to another via
|
|
* 'git checkout', then we want to replace one entry with another
|
|
* via merged_entry(). If there are staged changes, then we should
|
|
* reject the merge instead.
|
|
*/
|
|
return merged_entry(newtree, current, o);
|
|
} else if (S_ISSPARSEDIR(current->ce_mode)) {
|
|
/*
|
|
* The sparse directories differ, but we don't know whether that's
|
|
* because of two different files in the directory being modified
|
|
* (can be trivially merged) or if there is a real file conflict.
|
|
* Merge the sparse directory by OID to compare file-by-file.
|
|
*/
|
|
return merged_sparse_dir(src, 3, o);
|
|
} else
|
|
return reject_merge(current, o);
|
|
}
|
|
else if (newtree) {
|
|
if (oldtree && !o->initial_checkout) {
|
|
/*
|
|
* deletion of the path was staged;
|
|
*/
|
|
if (same(oldtree, newtree))
|
|
return 1;
|
|
return reject_merge(oldtree, o);
|
|
}
|
|
return merged_entry(newtree, current, o);
|
|
}
|
|
return deleted_entry(oldtree, current, o);
|
|
}
|
|
|
|
/*
|
|
* Bind merge.
|
|
*
|
|
* Keep the index entries at stage0, collapse stage1 but make sure
|
|
* stage0 does not have anything there.
|
|
*/
|
|
int bind_merge(const struct cache_entry * const *src,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
const struct cache_entry *old = src[0];
|
|
const struct cache_entry *a = src[1];
|
|
|
|
if (o->internal.merge_size != 1)
|
|
return error("Cannot do a bind merge of %d trees",
|
|
o->internal.merge_size);
|
|
if (a && old)
|
|
return o->quiet ? -1 :
|
|
error(ERRORMSG(o, ERROR_BIND_OVERLAP),
|
|
super_prefixed(a->name, o->super_prefix),
|
|
super_prefixed(old->name, o->super_prefix));
|
|
if (!a)
|
|
return keep_entry(old, o);
|
|
else
|
|
return merged_entry(a, NULL, o);
|
|
}
|
|
|
|
/*
|
|
* One-way merge.
|
|
*
|
|
* The rule is:
|
|
* - take the stat information from stage0, take the data from stage1
|
|
*/
|
|
int oneway_merge(const struct cache_entry * const *src,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
const struct cache_entry *old = src[0];
|
|
const struct cache_entry *a = src[1];
|
|
|
|
if (o->internal.merge_size != 1)
|
|
return error("Cannot do a oneway merge of %d trees",
|
|
o->internal.merge_size);
|
|
|
|
if (!a || a == o->df_conflict_entry)
|
|
return deleted_entry(old, old, o);
|
|
|
|
if (old && same(old, a)) {
|
|
int update = 0;
|
|
if (o->reset && o->update && !ce_uptodate(old) && !ce_skip_worktree(old) &&
|
|
!(old->ce_flags & CE_FSMONITOR_VALID)) {
|
|
struct stat st;
|
|
if (lstat(old->name, &st) ||
|
|
ie_match_stat(o->src_index, old, &st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE))
|
|
update |= CE_UPDATE;
|
|
}
|
|
if (o->update && S_ISGITLINK(old->ce_mode) &&
|
|
should_update_submodules() && !verify_uptodate(old, o))
|
|
update |= CE_UPDATE;
|
|
add_entry(o, old, update, CE_STAGEMASK);
|
|
return 0;
|
|
}
|
|
return merged_entry(a, old, o);
|
|
}
|
|
|
|
/*
|
|
* Merge worktree and untracked entries in a stash entry.
|
|
*
|
|
* Ignore all index entries. Collapse remaining trees but make sure that they
|
|
* don't have any conflicting files.
|
|
*/
|
|
int stash_worktree_untracked_merge(const struct cache_entry * const *src,
|
|
struct unpack_trees_options *o)
|
|
{
|
|
const struct cache_entry *worktree = src[1];
|
|
const struct cache_entry *untracked = src[2];
|
|
|
|
if (o->internal.merge_size != 2)
|
|
BUG("invalid merge_size: %d", o->internal.merge_size);
|
|
|
|
if (worktree && untracked)
|
|
return error(_("worktree and untracked commit have duplicate entries: %s"),
|
|
super_prefixed(worktree->name, o->super_prefix));
|
|
|
|
return merged_entry(worktree ? worktree : untracked, NULL, o);
|
|
}
|