a1264a08a1
Header files cleanup. * en/header-split-cache-h-part-3: (28 commits) fsmonitor-ll.h: split this header out of fsmonitor.h hash-ll, hashmap: move oidhash() to hash-ll object-store-ll.h: split this header out of object-store.h khash: name the structs that khash declares merge-ll: rename from ll-merge git-compat-util.h: remove unneccessary include of wildmatch.h builtin.h: remove unneccessary includes list-objects-filter-options.h: remove unneccessary include diff.h: remove unnecessary include of oidset.h repository: remove unnecessary include of path.h log-tree: replace include of revision.h with simple forward declaration cache.h: remove this no-longer-used header read-cache*.h: move declarations for read-cache.c functions from cache.h repository.h: move declaration of the_index from cache.h merge.h: move declarations for merge.c from cache.h diff.h: move declaration for global in diff.c from cache.h preload-index.h: move declarations for preload-index.c from elsewhere sparse-index.h: move declarations for sparse-index.c from cache.h name-hash.h: move declarations for name-hash.c from cache.h run-command.h: move declarations for run-command.c from cache.h ...
113 lines
2.8 KiB
C
113 lines
2.8 KiB
C
#include "git-compat-util.h"
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#include "gettext.h"
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#include "hex.h"
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#include "oidmap.h"
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#include "object-store-ll.h"
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#include "replace-object.h"
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#include "refs.h"
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#include "repository.h"
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#include "commit.h"
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static int register_replace_ref(struct repository *r,
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const char *refname,
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const struct object_id *oid,
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int flag UNUSED,
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void *cb_data UNUSED)
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{
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/* Get sha1 from refname */
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const char *slash = strrchr(refname, '/');
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const char *hash = slash ? slash + 1 : refname;
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struct replace_object *repl_obj = xmalloc(sizeof(*repl_obj));
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if (get_oid_hex(hash, &repl_obj->original.oid)) {
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free(repl_obj);
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warning(_("bad replace ref name: %s"), refname);
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return 0;
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}
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/* Copy sha1 from the read ref */
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oidcpy(&repl_obj->replacement, oid);
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/* Register new object */
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if (oidmap_put(r->objects->replace_map, repl_obj))
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die(_("duplicate replace ref: %s"), refname);
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return 0;
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}
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void prepare_replace_object(struct repository *r)
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{
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if (r->objects->replace_map_initialized)
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return;
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pthread_mutex_lock(&r->objects->replace_mutex);
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if (r->objects->replace_map_initialized) {
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pthread_mutex_unlock(&r->objects->replace_mutex);
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return;
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}
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r->objects->replace_map =
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xmalloc(sizeof(*r->objects->replace_map));
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oidmap_init(r->objects->replace_map, 0);
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for_each_replace_ref(r, register_replace_ref, NULL);
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r->objects->replace_map_initialized = 1;
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pthread_mutex_unlock(&r->objects->replace_mutex);
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}
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/* We allow "recursive" replacement. Only within reason, though */
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#define MAXREPLACEDEPTH 5
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/*
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* If a replacement for object oid has been set up, return the
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* replacement object's name (replaced recursively, if necessary).
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* The return value is either oid or a pointer to a
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* permanently-allocated value. This function always respects replace
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* references, regardless of the value of r->settings.read_replace_refs.
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*/
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const struct object_id *do_lookup_replace_object(struct repository *r,
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const struct object_id *oid)
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{
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int depth = MAXREPLACEDEPTH;
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const struct object_id *cur = oid;
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prepare_replace_object(r);
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/* Try to recursively replace the object */
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while (depth-- > 0) {
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struct replace_object *repl_obj =
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oidmap_get(r->objects->replace_map, cur);
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if (!repl_obj)
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return cur;
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cur = &repl_obj->replacement;
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}
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die(_("replace depth too high for object %s"), oid_to_hex(oid));
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}
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/*
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* This indicator determines whether replace references should be
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* respected process-wide, regardless of which repository is being
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* using at the time.
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*/
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static int read_replace_refs = 1;
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void disable_replace_refs(void)
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{
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read_replace_refs = 0;
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}
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int replace_refs_enabled(struct repository *r)
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{
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if (!read_replace_refs)
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return 0;
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if (r->gitdir) {
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prepare_repo_settings(r);
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return r->settings.read_replace_refs;
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}
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/* repository has no objects or refs. */
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return 0;
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}
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