diff options
Diffstat (limited to 'third_party/git/builtin/describe.c')
| -rw-r--r-- | third_party/git/builtin/describe.c | 681 |
1 files changed, 0 insertions, 681 deletions
diff --git a/third_party/git/builtin/describe.c b/third_party/git/builtin/describe.c deleted file mode 100644 index 7668591d575a..000000000000 --- a/third_party/git/builtin/describe.c +++ /dev/null @@ -1,681 +0,0 @@ -#define USE_THE_INDEX_COMPATIBILITY_MACROS -#include "cache.h" -#include "config.h" -#include "lockfile.h" -#include "commit.h" -#include "tag.h" -#include "blob.h" -#include "refs.h" -#include "builtin.h" -#include "exec-cmd.h" -#include "parse-options.h" -#include "revision.h" -#include "diff.h" -#include "hashmap.h" -#include "strvec.h" -#include "run-command.h" -#include "object-store.h" -#include "list-objects.h" -#include "commit-slab.h" - -#define MAX_TAGS (FLAG_BITS - 1) - -define_commit_slab(commit_names, struct commit_name *); - -static const char * const describe_usage[] = { - N_("git describe [<options>] [<commit-ish>...]"), - N_("git describe [<options>] --dirty"), - NULL -}; - -static int debug; /* Display lots of verbose info */ -static int all; /* Any valid ref can be used */ -static int tags; /* Allow lightweight tags */ -static int longformat; -static int first_parent; -static int abbrev = -1; /* unspecified */ -static int max_candidates = 10; -static struct hashmap names; -static int have_util; -static struct string_list patterns = STRING_LIST_INIT_NODUP; -static struct string_list exclude_patterns = STRING_LIST_INIT_NODUP; -static int always; -static const char *suffix, *dirty, *broken; -static struct commit_names commit_names; - -/* diff-index command arguments to check if working tree is dirty. */ -static const char *diff_index_args[] = { - "diff-index", "--quiet", "HEAD", "--", NULL -}; - -struct commit_name { - struct hashmap_entry entry; - struct object_id peeled; - struct tag *tag; - unsigned prio:2; /* annotated tag = 2, tag = 1, head = 0 */ - unsigned name_checked:1; - unsigned misnamed:1; - struct object_id oid; - char *path; -}; - -static const char *prio_names[] = { - N_("head"), N_("lightweight"), N_("annotated"), -}; - -static int commit_name_neq(const void *unused_cmp_data, - const struct hashmap_entry *eptr, - const struct hashmap_entry *entry_or_key, - const void *peeled) -{ - const struct commit_name *cn1, *cn2; - - cn1 = container_of(eptr, const struct commit_name, entry); - cn2 = container_of(entry_or_key, const struct commit_name, entry); - - return !oideq(&cn1->peeled, peeled ? peeled : &cn2->peeled); -} - -static inline struct commit_name *find_commit_name(const struct object_id *peeled) -{ - return hashmap_get_entry_from_hash(&names, oidhash(peeled), peeled, - struct commit_name, entry); -} - -static int replace_name(struct commit_name *e, - int prio, - const struct object_id *oid, - struct tag **tag) -{ - if (!e || e->prio < prio) - return 1; - - if (e->prio == 2 && prio == 2) { - /* Multiple annotated tags point to the same commit. - * Select one to keep based upon their tagger date. - */ - struct tag *t; - - if (!e->tag) { - t = lookup_tag(the_repository, &e->oid); - if (!t || parse_tag(t)) - return 1; - e->tag = t; - } - - t = lookup_tag(the_repository, oid); - if (!t || parse_tag(t)) - return 0; - *tag = t; - - if (e->tag->date < t->date) - return 1; - } - - return 0; -} - -static void add_to_known_names(const char *path, - const struct object_id *peeled, - int prio, - const struct object_id *oid) -{ - struct commit_name *e = find_commit_name(peeled); - struct tag *tag = NULL; - if (replace_name(e, prio, oid, &tag)) { - if (!e) { - e = xmalloc(sizeof(struct commit_name)); - oidcpy(&e->peeled, peeled); - hashmap_entry_init(&e->entry, oidhash(peeled)); - hashmap_add(&names, &e->entry); - e->path = NULL; - } - e->tag = tag; - e->prio = prio; - e->name_checked = 0; - e->misnamed = 0; - oidcpy(&e->oid, oid); - free(e->path); - e->path = xstrdup(path); - } -} - -static int get_name(const char *path, const struct object_id *oid, int flag, void *cb_data) -{ - int is_tag = 0; - struct object_id peeled; - int is_annotated, prio; - const char *path_to_match = NULL; - - if (skip_prefix(path, "refs/tags/", &path_to_match)) { - is_tag = 1; - } else if (all) { - if ((exclude_patterns.nr || patterns.nr) && - !skip_prefix(path, "refs/heads/", &path_to_match) && - !skip_prefix(path, "refs/remotes/", &path_to_match)) { - /* Only accept reference of known type if there are match/exclude patterns */ - return 0; - } - } else { - /* Reject anything outside refs/tags/ unless --all */ - return 0; - } - - /* - * If we're given exclude patterns, first exclude any tag which match - * any of the exclude pattern. - */ - if (exclude_patterns.nr) { - struct string_list_item *item; - - for_each_string_list_item(item, &exclude_patterns) { - if (!wildmatch(item->string, path_to_match, 0)) - return 0; - } - } - - /* - * If we're given patterns, accept only tags which match at least one - * pattern. - */ - if (patterns.nr) { - int found = 0; - struct string_list_item *item; - - for_each_string_list_item(item, &patterns) { - if (!wildmatch(item->string, path_to_match, 0)) { - found = 1; - break; - } - } - - if (!found) - return 0; - } - - /* Is it annotated? */ - if (!peel_ref(path, &peeled)) { - is_annotated = !oideq(oid, &peeled); - } else { - oidcpy(&peeled, oid); - is_annotated = 0; - } - - /* - * By default, we only use annotated tags, but with --tags - * we fall back to lightweight ones (even without --tags, - * we still remember lightweight ones, only to give hints - * in an error message). --all allows any refs to be used. - */ - if (is_annotated) - prio = 2; - else if (is_tag) - prio = 1; - else - prio = 0; - - add_to_known_names(all ? path + 5 : path + 10, &peeled, prio, oid); - return 0; -} - -struct possible_tag { - struct commit_name *name; - int depth; - int found_order; - unsigned flag_within; -}; - -static int compare_pt(const void *a_, const void *b_) -{ - struct possible_tag *a = (struct possible_tag *)a_; - struct possible_tag *b = (struct possible_tag *)b_; - if (a->depth != b->depth) - return a->depth - b->depth; - if (a->found_order != b->found_order) - return a->found_order - b->found_order; - return 0; -} - -static unsigned long finish_depth_computation( - struct commit_list **list, - struct possible_tag *best) -{ - unsigned long seen_commits = 0; - while (*list) { - struct commit *c = pop_commit(list); - struct commit_list *parents = c->parents; - seen_commits++; - if (c->object.flags & best->flag_within) { - struct commit_list *a = *list; - while (a) { - struct commit *i = a->item; - if (!(i->object.flags & best->flag_within)) - break; - a = a->next; - } - if (!a) - break; - } else - best->depth++; - while (parents) { - struct commit *p = parents->item; - parse_commit(p); - if (!(p->object.flags & SEEN)) - commit_list_insert_by_date(p, list); - p->object.flags |= c->object.flags; - parents = parents->next; - } - } - return seen_commits; -} - -static void append_name(struct commit_name *n, struct strbuf *dst) -{ - if (n->prio == 2 && !n->tag) { - n->tag = lookup_tag(the_repository, &n->oid); - if (!n->tag || parse_tag(n->tag)) - die(_("annotated tag %s not available"), n->path); - } - if (n->tag && !n->name_checked) { - if (strcmp(n->tag->tag, all ? n->path + 5 : n->path)) { - warning(_("tag '%s' is externally known as '%s'"), - n->path, n->tag->tag); - n->misnamed = 1; - } - n->name_checked = 1; - } - - if (n->tag) { - if (all) - strbuf_addstr(dst, "tags/"); - strbuf_addstr(dst, n->tag->tag); - } else { - strbuf_addstr(dst, n->path); - } -} - -static void append_suffix(int depth, const struct object_id *oid, struct strbuf *dst) -{ - strbuf_addf(dst, "-%d-g%s", depth, find_unique_abbrev(oid, abbrev)); -} - -static void describe_commit(struct object_id *oid, struct strbuf *dst) -{ - struct commit *cmit, *gave_up_on = NULL; - struct commit_list *list; - struct commit_name *n; - struct possible_tag all_matches[MAX_TAGS]; - unsigned int match_cnt = 0, annotated_cnt = 0, cur_match; - unsigned long seen_commits = 0; - unsigned int unannotated_cnt = 0; - - cmit = lookup_commit_reference(the_repository, oid); - - n = find_commit_name(&cmit->object.oid); - if (n && (tags || all || n->prio == 2)) { - /* - * Exact match to an existing ref. - */ - append_name(n, dst); - if (n->misnamed || longformat) - append_suffix(0, n->tag ? get_tagged_oid(n->tag) : oid, dst); - if (suffix) - strbuf_addstr(dst, suffix); - return; - } - - if (!max_candidates) - die(_("no tag exactly matches '%s'"), oid_to_hex(&cmit->object.oid)); - if (debug) - fprintf(stderr, _("No exact match on refs or tags, searching to describe\n")); - - if (!have_util) { - struct hashmap_iter iter; - struct commit *c; - struct commit_name *n; - - init_commit_names(&commit_names); - hashmap_for_each_entry(&names, &iter, n, - entry /* member name */) { - c = lookup_commit_reference_gently(the_repository, - &n->peeled, 1); - if (c) - *commit_names_at(&commit_names, c) = n; - } - have_util = 1; - } - - list = NULL; - cmit->object.flags = SEEN; - commit_list_insert(cmit, &list); - while (list) { - struct commit *c = pop_commit(&list); - struct commit_list *parents = c->parents; - struct commit_name **slot; - - seen_commits++; - slot = commit_names_peek(&commit_names, c); - n = slot ? *slot : NULL; - if (n) { - if (!tags && !all && n->prio < 2) { - unannotated_cnt++; - } else if (match_cnt < max_candidates) { - struct possible_tag *t = &all_matches[match_cnt++]; - t->name = n; - t->depth = seen_commits - 1; - t->flag_within = 1u << match_cnt; - t->found_order = match_cnt; - c->object.flags |= t->flag_within; - if (n->prio == 2) - annotated_cnt++; - } - else { - gave_up_on = c; - break; - } - } - for (cur_match = 0; cur_match < match_cnt; cur_match++) { - struct possible_tag *t = &all_matches[cur_match]; - if (!(c->object.flags & t->flag_within)) - t->depth++; - } - /* Stop if last remaining path already covered by best candidate(s) */ - if (annotated_cnt && !list) { - int best_depth = INT_MAX; - unsigned best_within = 0; - for (cur_match = 0; cur_match < match_cnt; cur_match++) { - struct possible_tag *t = &all_matches[cur_match]; - if (t->depth < best_depth) { - best_depth = t->depth; - best_within = t->flag_within; - } else if (t->depth == best_depth) { - best_within |= t->flag_within; - } - } - if ((c->object.flags & best_within) == best_within) { - if (debug) - fprintf(stderr, _("finished search at %s\n"), - oid_to_hex(&c->object.oid)); - break; - } - } - while (parents) { - struct commit *p = parents->item; - parse_commit(p); - if (!(p->object.flags & SEEN)) - commit_list_insert_by_date(p, &list); - p->object.flags |= c->object.flags; - parents = parents->next; - - if (first_parent) - break; - } - } - - if (!match_cnt) { - struct object_id *cmit_oid = &cmit->object.oid; - if (always) { - strbuf_add_unique_abbrev(dst, cmit_oid, abbrev); - if (suffix) - strbuf_addstr(dst, suffix); - return; - } - if (unannotated_cnt) - die(_("No annotated tags can describe '%s'.\n" - "However, there were unannotated tags: try --tags."), - oid_to_hex(cmit_oid)); - else - die(_("No tags can describe '%s'.\n" - "Try --always, or create some tags."), - oid_to_hex(cmit_oid)); - } - - QSORT(all_matches, match_cnt, compare_pt); - - if (gave_up_on) { - commit_list_insert_by_date(gave_up_on, &list); - seen_commits--; - } - seen_commits += finish_depth_computation(&list, &all_matches[0]); - free_commit_list(list); - - if (debug) { - static int label_width = -1; - if (label_width < 0) { - int i, w; - for (i = 0; i < ARRAY_SIZE(prio_names); i++) { - w = strlen(_(prio_names[i])); - if (label_width < w) - label_width = w; - } - } - for (cur_match = 0; cur_match < match_cnt; cur_match++) { - struct possible_tag *t = &all_matches[cur_match]; - fprintf(stderr, " %-*s %8d %s\n", - label_width, _(prio_names[t->name->prio]), - t->depth, t->name->path); - } - fprintf(stderr, _("traversed %lu commits\n"), seen_commits); - if (gave_up_on) { - fprintf(stderr, - _("more than %i tags found; listed %i most recent\n" - "gave up search at %s\n"), - max_candidates, max_candidates, - oid_to_hex(&gave_up_on->object.oid)); - } - } - - append_name(all_matches[0].name, dst); - if (all_matches[0].name->misnamed || abbrev) - append_suffix(all_matches[0].depth, &cmit->object.oid, dst); - if (suffix) - strbuf_addstr(dst, suffix); -} - -struct process_commit_data { - struct object_id current_commit; - struct object_id looking_for; - struct strbuf *dst; - struct rev_info *revs; -}; - -static void process_commit(struct commit *commit, void *data) -{ - struct process_commit_data *pcd = data; - pcd->current_commit = commit->object.oid; -} - -static void process_object(struct object *obj, const char *path, void *data) -{ - struct process_commit_data *pcd = data; - - if (oideq(&pcd->looking_for, &obj->oid) && !pcd->dst->len) { - reset_revision_walk(); - describe_commit(&pcd->current_commit, pcd->dst); - strbuf_addf(pcd->dst, ":%s", path); - free_commit_list(pcd->revs->commits); - pcd->revs->commits = NULL; - } -} - -static void describe_blob(struct object_id oid, struct strbuf *dst) -{ - struct rev_info revs; - struct strvec args = STRVEC_INIT; - struct process_commit_data pcd = { null_oid, oid, dst, &revs}; - - strvec_pushl(&args, "internal: The first arg is not parsed", - "--objects", "--in-commit-order", "--reverse", "HEAD", - NULL); - - repo_init_revisions(the_repository, &revs, NULL); - if (setup_revisions(args.nr, args.v, &revs, NULL) > 1) - BUG("setup_revisions could not handle all args?"); - - if (prepare_revision_walk(&revs)) - die("revision walk setup failed"); - - traverse_commit_list(&revs, process_commit, process_object, &pcd); - reset_revision_walk(); -} - -static void describe(const char *arg, int last_one) -{ - struct object_id oid; - struct commit *cmit; - struct strbuf sb = STRBUF_INIT; - - if (debug) - fprintf(stderr, _("describe %s\n"), arg); - - if (get_oid(arg, &oid)) - die(_("Not a valid object name %s"), arg); - cmit = lookup_commit_reference_gently(the_repository, &oid, 1); - - if (cmit) - describe_commit(&oid, &sb); - else if (oid_object_info(the_repository, &oid, NULL) == OBJ_BLOB) - describe_blob(oid, &sb); - else - die(_("%s is neither a commit nor blob"), arg); - - puts(sb.buf); - - if (!last_one) - clear_commit_marks(cmit, -1); - - strbuf_release(&sb); -} - -int cmd_describe(int argc, const char **argv, const char *prefix) -{ - int contains = 0; - struct option options[] = { - OPT_BOOL(0, "contains", &contains, N_("find the tag that comes after the commit")), - OPT_BOOL(0, "debug", &debug, N_("debug search strategy on stderr")), - OPT_BOOL(0, "all", &all, N_("use any ref")), - OPT_BOOL(0, "tags", &tags, N_("use any tag, even unannotated")), - OPT_BOOL(0, "long", &longformat, N_("always use long format")), - OPT_BOOL(0, "first-parent", &first_parent, N_("only follow first parent")), - OPT__ABBREV(&abbrev), - OPT_SET_INT(0, "exact-match", &max_candidates, - N_("only output exact matches"), 0), - OPT_INTEGER(0, "candidates", &max_candidates, - N_("consider <n> most recent tags (default: 10)")), - OPT_STRING_LIST(0, "match", &patterns, N_("pattern"), - N_("only consider tags matching <pattern>")), - OPT_STRING_LIST(0, "exclude", &exclude_patterns, N_("pattern"), - N_("do not consider tags matching <pattern>")), - OPT_BOOL(0, "always", &always, - N_("show abbreviated commit object as fallback")), - {OPTION_STRING, 0, "dirty", &dirty, N_("mark"), - N_("append <mark> on dirty working tree (default: \"-dirty\")"), - PARSE_OPT_OPTARG, NULL, (intptr_t) "-dirty"}, - {OPTION_STRING, 0, "broken", &broken, N_("mark"), - N_("append <mark> on broken working tree (default: \"-broken\")"), - PARSE_OPT_OPTARG, NULL, (intptr_t) "-broken"}, - OPT_END(), - }; - - git_config(git_default_config, NULL); - argc = parse_options(argc, argv, prefix, options, describe_usage, 0); - if (abbrev < 0) - abbrev = DEFAULT_ABBREV; - - if (max_candidates < 0) - max_candidates = 0; - else if (max_candidates > MAX_TAGS) - max_candidates = MAX_TAGS; - - save_commit_buffer = 0; - - if (longformat && abbrev == 0) - die(_("--long is incompatible with --abbrev=0")); - - if (contains) { - struct string_list_item *item; - struct strvec args; - - strvec_init(&args); - strvec_pushl(&args, "name-rev", - "--peel-tag", "--name-only", "--no-undefined", - NULL); - if (always) - strvec_push(&args, "--always"); - if (!all) { - strvec_push(&args, "--tags"); - for_each_string_list_item(item, &patterns) - strvec_pushf(&args, "--refs=refs/tags/%s", item->string); - for_each_string_list_item(item, &exclude_patterns) - strvec_pushf(&args, "--exclude=refs/tags/%s", item->string); - } - if (argc) - strvec_pushv(&args, argv); - else - strvec_push(&args, "HEAD"); - return cmd_name_rev(args.nr, args.v, prefix); - } - - hashmap_init(&names, commit_name_neq, NULL, 0); - for_each_rawref(get_name, NULL); - if (!hashmap_get_size(&names) && !always) - die(_("No names found, cannot describe anything.")); - - if (argc == 0) { - if (broken) { - struct child_process cp = CHILD_PROCESS_INIT; - strvec_pushv(&cp.args, diff_index_args); - cp.git_cmd = 1; - cp.no_stdin = 1; - cp.no_stdout = 1; - - if (!dirty) - dirty = "-dirty"; - - switch (run_command(&cp)) { - case 0: - suffix = NULL; - break; - case 1: - suffix = dirty; - break; - default: - /* diff-index aborted abnormally */ - suffix = broken; - } - } else if (dirty) { - struct lock_file index_lock = LOCK_INIT; - struct rev_info revs; - struct strvec args = STRVEC_INIT; - int fd, result; - - setup_work_tree(); - read_cache(); - refresh_index(&the_index, REFRESH_QUIET|REFRESH_UNMERGED, - NULL, NULL, NULL); - fd = hold_locked_index(&index_lock, 0); - if (0 <= fd) - repo_update_index_if_able(the_repository, &index_lock); - - repo_init_revisions(the_repository, &revs, prefix); - strvec_pushv(&args, diff_index_args); - if (setup_revisions(args.nr, args.v, &revs, NULL) != 1) - BUG("malformed internal diff-index command line"); - result = run_diff_index(&revs, 0); - - if (!diff_result_code(&revs.diffopt, result)) - suffix = NULL; - else - suffix = dirty; - } - describe("HEAD", 1); - } else if (dirty) { - die(_("--dirty is incompatible with commit-ishes")); - } else if (broken) { - die(_("--broken is incompatible with commit-ishes")); - } else { - while (argc-- > 0) - describe(*argv++, argc == 0); - } - return 0; -} |