about summary refs log tree commit diff
path: root/third_party/git/builtin/describe.c
diff options
context:
space:
mode:
Diffstat (limited to 'third_party/git/builtin/describe.c')
-rw-r--r--third_party/git/builtin/describe.c662
1 files changed, 0 insertions, 662 deletions
diff --git a/third_party/git/builtin/describe.c b/third_party/git/builtin/describe.c
deleted file mode 100644
index 200154297d..0000000000
--- a/third_party/git/builtin/describe.c
+++ /dev/null
@@ -1,662 +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 "argv-array.h"
-#include "run-command.h"
-#include "object-store.h"
-#include "revision.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;
-	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 void *entry,
-			   const void *entry_or_key,
-			   const void *peeled)
-{
-	const struct commit_name *cn1 = entry;
-	const struct commit_name *cn2 = entry_or_key;
-
-	return !oideq(&cn1->peeled, peeled ? peeled : &cn2->peeled);
-}
-
-static inline struct commit_name *find_commit_name(const struct object_id *peeled)
-{
-	return hashmap_get_from_hash(&names, oidhash(peeled), peeled);
-}
-
-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, oidhash(peeled));
-			hashmap_add(&names, e);
-			e->path = NULL;
-		}
-		e->tag = tag;
-		e->prio = prio;
-		e->name_checked = 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 (!n->tag->tag)
-			die(_("annotated tag %s has no embedded name"), n->path);
-		if (strcmp(n->tag->tag, all ? n->path + 5 : n->path))
-			warning(_("tag '%s' is really '%s' here"), n->tag->tag, n->path);
-		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 (longformat)
-			append_suffix(0, n->tag ? &n->tag->tagged->oid : 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);
-		n = hashmap_iter_first(&names, &iter);
-		for (; n; n = hashmap_iter_next(&iter)) {
-			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++;
-		}
-		if (annotated_cnt && !list) {
-			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 (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 argv_array args = ARGV_ARRAY_INIT;
-	struct process_commit_data pcd = { null_oid, oid, dst, &revs};
-
-	argv_array_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.argc, args.argv, &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 argv_array args;
-
-		argv_array_init(&args);
-		argv_array_pushl(&args, "name-rev",
-				 "--peel-tag", "--name-only", "--no-undefined",
-				 NULL);
-		if (always)
-			argv_array_push(&args, "--always");
-		if (!all) {
-			argv_array_push(&args, "--tags");
-			for_each_string_list_item(item, &patterns)
-				argv_array_pushf(&args, "--refs=refs/tags/%s", item->string);
-			for_each_string_list_item(item, &exclude_patterns)
-				argv_array_pushf(&args, "--exclude=refs/tags/%s", item->string);
-		}
-		if (argc)
-			argv_array_pushv(&args, argv);
-		else
-			argv_array_push(&args, "HEAD");
-		return cmd_name_rev(args.argc, args.argv, 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;
-			argv_array_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 argv_array args = ARGV_ARRAY_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);
-			argv_array_pushv(&args, diff_index_args);
-			if (setup_revisions(args.argc, args.argv, &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;
-}