fb85db84dc
You can ask rev-list to use bitmaps to speed up an --objects traversal, which should generally give you your answers much faster. Likewise, you can ask rev-list to limit such a traversal with `-n`, in which case we'll show only a limited set of commits (and only the tree and commit objects directly reachable from those commits). But if you do both together, the results are nonsensical. We end up limiting any fallback traversal we do to _find_ the bitmaps, but the actual set of objects we output will be picked arbitrarily from the union of any bitmaps we do find, and will involve the objects of many more commits. It's possible that somebody might want this as a "show me what you can, but limit the amount of work you do" flag. But as with the prior commit clamping "--count", the results are basically non-deterministic; you'll get the values from some commits between `n` and the total number, and you can't tell which. And unlike the `--count` case, we can't easily generate the "real" value from the bitmap values (you can't just walk back `-n` commits and subtract out the reachable objects from the boundary commits; the bitmaps for `X` record its total reachability, so you don't know which objects are directly from `X` itself, which from `X^`, and so on). So let's just fallback to the non-bitmap code path in this case, so we always give a sane answer. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
405 lines
10 KiB
C
405 lines
10 KiB
C
#include "cache.h"
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#include "commit.h"
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#include "diff.h"
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#include "revision.h"
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#include "list-objects.h"
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#include "pack.h"
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#include "pack-bitmap.h"
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#include "builtin.h"
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#include "log-tree.h"
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#include "graph.h"
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#include "bisect.h"
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static const char rev_list_usage[] =
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"git rev-list [OPTION] <commit-id>... [ -- paths... ]\n"
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" limiting output:\n"
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" --max-count=<n>\n"
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" --max-age=<epoch>\n"
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" --min-age=<epoch>\n"
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" --sparse\n"
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" --no-merges\n"
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" --min-parents=<n>\n"
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" --no-min-parents\n"
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" --max-parents=<n>\n"
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" --no-max-parents\n"
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" --remove-empty\n"
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" --all\n"
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" --branches\n"
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" --tags\n"
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" --remotes\n"
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" --stdin\n"
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" --quiet\n"
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" ordering output:\n"
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" --topo-order\n"
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" --date-order\n"
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" --reverse\n"
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" formatting output:\n"
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" --parents\n"
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" --children\n"
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" --objects | --objects-edge\n"
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" --unpacked\n"
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" --header | --pretty\n"
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" --abbrev=<n> | --no-abbrev\n"
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" --abbrev-commit\n"
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" --left-right\n"
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" --count\n"
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" special purpose:\n"
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" --bisect\n"
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" --bisect-vars\n"
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" --bisect-all"
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;
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static void finish_commit(struct commit *commit, void *data);
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static void show_commit(struct commit *commit, void *data)
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{
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struct rev_list_info *info = data;
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struct rev_info *revs = info->revs;
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if (info->flags & REV_LIST_QUIET) {
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finish_commit(commit, data);
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return;
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}
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graph_show_commit(revs->graph);
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if (revs->count) {
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if (commit->object.flags & PATCHSAME)
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revs->count_same++;
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else if (commit->object.flags & SYMMETRIC_LEFT)
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revs->count_left++;
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else
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revs->count_right++;
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finish_commit(commit, data);
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return;
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}
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if (info->show_timestamp)
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printf("%lu ", commit->date);
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if (info->header_prefix)
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fputs(info->header_prefix, stdout);
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if (!revs->graph)
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fputs(get_revision_mark(revs, commit), stdout);
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if (revs->abbrev_commit && revs->abbrev)
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fputs(find_unique_abbrev(commit->object.sha1, revs->abbrev),
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stdout);
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else
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fputs(sha1_to_hex(commit->object.sha1), stdout);
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if (revs->print_parents) {
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struct commit_list *parents = commit->parents;
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while (parents) {
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printf(" %s", sha1_to_hex(parents->item->object.sha1));
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parents = parents->next;
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}
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}
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if (revs->children.name) {
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struct commit_list *children;
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children = lookup_decoration(&revs->children, &commit->object);
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while (children) {
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printf(" %s", sha1_to_hex(children->item->object.sha1));
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children = children->next;
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}
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}
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show_decorations(revs, commit);
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if (revs->commit_format == CMIT_FMT_ONELINE)
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putchar(' ');
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else
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putchar('\n');
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if (revs->verbose_header && get_cached_commit_buffer(commit, NULL)) {
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struct strbuf buf = STRBUF_INIT;
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struct pretty_print_context ctx = {0};
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ctx.abbrev = revs->abbrev;
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ctx.date_mode = revs->date_mode;
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ctx.date_mode_explicit = revs->date_mode_explicit;
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ctx.fmt = revs->commit_format;
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ctx.output_encoding = get_log_output_encoding();
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pretty_print_commit(&ctx, commit, &buf);
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if (revs->graph) {
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if (buf.len) {
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if (revs->commit_format != CMIT_FMT_ONELINE)
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graph_show_oneline(revs->graph);
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graph_show_commit_msg(revs->graph, &buf);
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/*
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* Add a newline after the commit message.
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*
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* Usually, this newline produces a blank
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* padding line between entries, in which case
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* we need to add graph padding on this line.
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*
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* However, the commit message may not end in a
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* newline. In this case the newline simply
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* ends the last line of the commit message,
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* and we don't need any graph output. (This
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* always happens with CMIT_FMT_ONELINE, and it
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* happens with CMIT_FMT_USERFORMAT when the
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* format doesn't explicitly end in a newline.)
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*/
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if (buf.len && buf.buf[buf.len - 1] == '\n')
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graph_show_padding(revs->graph);
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putchar('\n');
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} else {
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/*
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* If the message buffer is empty, just show
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* the rest of the graph output for this
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* commit.
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*/
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if (graph_show_remainder(revs->graph))
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putchar('\n');
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if (revs->commit_format == CMIT_FMT_ONELINE)
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putchar('\n');
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}
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} else {
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if (revs->commit_format != CMIT_FMT_USERFORMAT ||
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buf.len) {
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fwrite(buf.buf, 1, buf.len, stdout);
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putchar(info->hdr_termination);
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}
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}
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strbuf_release(&buf);
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} else {
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if (graph_show_remainder(revs->graph))
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putchar('\n');
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}
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maybe_flush_or_die(stdout, "stdout");
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finish_commit(commit, data);
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}
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static void finish_commit(struct commit *commit, void *data)
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{
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if (commit->parents) {
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free_commit_list(commit->parents);
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commit->parents = NULL;
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}
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free_commit_buffer(commit);
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}
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static void finish_object(struct object *obj, const char *name, void *cb_data)
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{
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struct rev_list_info *info = cb_data;
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if (obj->type == OBJ_BLOB && !has_sha1_file(obj->sha1))
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die("missing blob object '%s'", sha1_to_hex(obj->sha1));
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if (info->revs->verify_objects && !obj->parsed && obj->type != OBJ_COMMIT)
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parse_object(obj->sha1);
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}
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static void show_object(struct object *obj, const char *name, void *cb_data)
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{
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struct rev_list_info *info = cb_data;
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finish_object(obj, name, cb_data);
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if (info->flags & REV_LIST_QUIET)
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return;
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show_object_with_name(stdout, obj, name);
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}
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static void show_edge(struct commit *commit)
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{
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printf("-%s\n", sha1_to_hex(commit->object.sha1));
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}
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static void print_var_str(const char *var, const char *val)
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{
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printf("%s='%s'\n", var, val);
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}
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static void print_var_int(const char *var, int val)
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{
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printf("%s=%d\n", var, val);
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}
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static int show_bisect_vars(struct rev_list_info *info, int reaches, int all)
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{
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int cnt, flags = info->flags;
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char hex[41] = "";
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struct commit_list *tried;
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struct rev_info *revs = info->revs;
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if (!revs->commits)
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return 1;
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revs->commits = filter_skipped(revs->commits, &tried,
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flags & BISECT_SHOW_ALL,
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NULL, NULL);
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/*
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* revs->commits can reach "reaches" commits among
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* "all" commits. If it is good, then there are
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* (all-reaches) commits left to be bisected.
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* On the other hand, if it is bad, then the set
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* to bisect is "reaches".
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* A bisect set of size N has (N-1) commits further
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* to test, as we already know one bad one.
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*/
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cnt = all - reaches;
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if (cnt < reaches)
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cnt = reaches;
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if (revs->commits)
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strcpy(hex, sha1_to_hex(revs->commits->item->object.sha1));
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if (flags & BISECT_SHOW_ALL) {
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traverse_commit_list(revs, show_commit, show_object, info);
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printf("------\n");
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}
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print_var_str("bisect_rev", hex);
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print_var_int("bisect_nr", cnt - 1);
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print_var_int("bisect_good", all - reaches - 1);
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print_var_int("bisect_bad", reaches - 1);
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print_var_int("bisect_all", all);
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print_var_int("bisect_steps", estimate_bisect_steps(all));
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return 0;
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}
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static int show_object_fast(
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const unsigned char *sha1,
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enum object_type type,
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int exclude,
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uint32_t name_hash,
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struct packed_git *found_pack,
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off_t found_offset)
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{
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fprintf(stdout, "%s\n", sha1_to_hex(sha1));
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return 1;
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}
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int cmd_rev_list(int argc, const char **argv, const char *prefix)
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{
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struct rev_info revs;
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struct rev_list_info info;
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int i;
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int bisect_list = 0;
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int bisect_show_vars = 0;
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int bisect_find_all = 0;
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int use_bitmap_index = 0;
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git_config(git_default_config, NULL);
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init_revisions(&revs, prefix);
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revs.abbrev = DEFAULT_ABBREV;
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revs.commit_format = CMIT_FMT_UNSPECIFIED;
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argc = setup_revisions(argc, argv, &revs, NULL);
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memset(&info, 0, sizeof(info));
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info.revs = &revs;
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if (revs.bisect)
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bisect_list = 1;
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if (DIFF_OPT_TST(&revs.diffopt, QUICK))
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info.flags |= REV_LIST_QUIET;
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for (i = 1 ; i < argc; i++) {
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const char *arg = argv[i];
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if (!strcmp(arg, "--header")) {
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revs.verbose_header = 1;
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continue;
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}
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if (!strcmp(arg, "--timestamp")) {
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info.show_timestamp = 1;
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continue;
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}
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if (!strcmp(arg, "--bisect")) {
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bisect_list = 1;
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continue;
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}
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if (!strcmp(arg, "--bisect-all")) {
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bisect_list = 1;
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bisect_find_all = 1;
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info.flags |= BISECT_SHOW_ALL;
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revs.show_decorations = 1;
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continue;
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}
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if (!strcmp(arg, "--bisect-vars")) {
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bisect_list = 1;
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bisect_show_vars = 1;
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continue;
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}
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if (!strcmp(arg, "--use-bitmap-index")) {
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use_bitmap_index = 1;
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continue;
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}
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if (!strcmp(arg, "--test-bitmap")) {
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test_bitmap_walk(&revs);
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return 0;
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}
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usage(rev_list_usage);
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}
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if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
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/* The command line has a --pretty */
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info.hdr_termination = '\n';
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if (revs.commit_format == CMIT_FMT_ONELINE)
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info.header_prefix = "";
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else
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info.header_prefix = "commit ";
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}
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else if (revs.verbose_header)
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/* Only --header was specified */
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revs.commit_format = CMIT_FMT_RAW;
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if ((!revs.commits &&
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(!(revs.tag_objects || revs.tree_objects || revs.blob_objects) &&
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!revs.pending.nr)) ||
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revs.diff)
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usage(rev_list_usage);
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save_commit_buffer = (revs.verbose_header ||
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revs.grep_filter.pattern_list ||
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revs.grep_filter.header_list);
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if (bisect_list)
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revs.limited = 1;
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if (use_bitmap_index && !revs.prune) {
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if (revs.count && !revs.left_right && !revs.cherry_mark) {
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uint32_t commit_count;
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int max_count = revs.max_count;
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if (!prepare_bitmap_walk(&revs)) {
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count_bitmap_commit_list(&commit_count, NULL, NULL, NULL);
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if (max_count >= 0 && max_count < commit_count)
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commit_count = max_count;
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printf("%d\n", commit_count);
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return 0;
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}
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} else if (revs.max_count < 0 &&
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revs.tag_objects && revs.tree_objects && revs.blob_objects) {
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if (!prepare_bitmap_walk(&revs)) {
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traverse_bitmap_commit_list(&show_object_fast);
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return 0;
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}
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}
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}
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if (prepare_revision_walk(&revs))
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die("revision walk setup failed");
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if (revs.tree_objects)
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mark_edges_uninteresting(&revs, show_edge);
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if (bisect_list) {
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int reaches = reaches, all = all;
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revs.commits = find_bisection(revs.commits, &reaches, &all,
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bisect_find_all);
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if (bisect_show_vars)
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return show_bisect_vars(&info, reaches, all);
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}
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traverse_commit_list(&revs, show_commit, show_object, &info);
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if (revs.count) {
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if (revs.left_right && revs.cherry_mark)
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printf("%d\t%d\t%d\n", revs.count_left, revs.count_right, revs.count_same);
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else if (revs.left_right)
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printf("%d\t%d\n", revs.count_left, revs.count_right);
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else if (revs.cherry_mark)
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printf("%d\t%d\n", revs.count_left + revs.count_right, revs.count_same);
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else
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printf("%d\n", revs.count_left + revs.count_right);
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}
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return 0;
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}
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