X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=show-branch.c;h=c7422460be0a68dc34baa1dc8b66aa44559d56de;hb=9470657ad0d0472e3e3c2e352334f60e7bd777c1;hp=958a5e884afdf8bc21d672242d6bbee8d3c7340a;hpb=7a034337420a45395b3f68a1f12ca53d8b0652be;p=git.git

diff --git a/show-branch.c b/show-branch.c
index 958a5e88..c7422460 100644
--- a/show-branch.c
+++ b/show-branch.c
@@ -1,10 +1,11 @@
 #include <stdlib.h>
+#include <fnmatch.h>
 #include "cache.h"
 #include "commit.h"
 #include "refs.h"
 
 static const char show_branch_usage[] =
-"git-show-branch [--all] [--heads] [--tags] [--more=count] [<refs>...]";
+"git-show-branch [--all] [--heads] [--tags] [--topo-order] [--more=count | --list | --independent | --merge-base ] [<refs>...]";
 
 #define UNINTERESTING	01
 
@@ -54,7 +55,7 @@ static void name_commit(struct commit *commit, const char *head_name, int nth)
 
 /* Parent is the first parent of the commit.  We may name it
  * as (n+1)th generation ancestor of the same head_name as
- * commit is nth generation ancestore of, if that generation
+ * commit is nth generation ancestor of, if that generation
  * number is better than the name it already has.
  */
 static void name_parent(struct commit *commit, struct commit *parent)
@@ -133,12 +134,28 @@ static void name_commits(struct commit_list *list,
 			nth = 0;
 			while (parents) {
 				struct commit *p = parents->item;
-				char newname[1000];
+				char newname[1000], *en;
 				parents = parents->next;
 				nth++;
 				if (p->object.util)
 					continue;
-				sprintf(newname, "%s^%d", n->head_name, nth);
+				en = newname;
+				switch (n->generation) {
+				case 0:
+					en += sprintf(en, "%s", n->head_name);
+					break;
+				case 1:
+					en += sprintf(en, "%s^", n->head_name);
+					break;
+				default:
+					en += sprintf(en, "%s~%d",
+						n->head_name, n->generation);
+					break;
+				}
+				if (nth == 1)
+					en += sprintf(en, "^");
+				else
+					en += sprintf(en, "^%d", nth);
 				name_commit(p, strdup(newname), 0);
 				i++;
 				name_first_parent_chain(p);
@@ -165,11 +182,11 @@ static void join_revs(struct commit_list **list_p,
 
 	while (*list_p) {
 		struct commit_list *parents;
+		int still_interesting = !!interesting(*list_p);
 		struct commit *commit = pop_one_commit(list_p);
 		int flags = commit->object.flags & all_mask;
-		int still_interesting = !!interesting(*list_p);
 
-		if (!still_interesting && extra < 0)
+		if (!still_interesting && extra <= 0)
 			break;
 
 		mark_seen(commit, seen_p);
@@ -183,30 +200,83 @@ static void join_revs(struct commit_list **list_p,
 			parents = parents->next;
 			if ((this_flag & flags) == flags)
 				continue;
-			parse_commit(p);
+			if (!p->object.parsed)
+				parse_commit(p);
 			if (mark_seen(p, seen_p) && !still_interesting)
 				extra--;
 			p->object.flags |= flags;
 			insert_by_date(p, list_p);
 		}
 	}
+
+	/*
+	 * Postprocess to complete well-poisoning.
+	 *
+	 * At this point we have all the commits we have seen in
+	 * seen_p list (which happens to be sorted chronologically but
+	 * it does not really matter).  Mark anything that can be
+	 * reached from uninteresting commits not interesting.
+	 */
+	for (;;) {
+		int changed = 0;
+		struct commit_list *s;
+		for (s = *seen_p; s; s = s->next) {
+			struct commit *c = s->item;
+			struct commit_list *parents;
+
+			if (((c->object.flags & all_revs) != all_revs) &&
+			    !(c->object.flags & UNINTERESTING))
+				continue;
+
+			/* The current commit is either a merge base or
+			 * already uninteresting one.  Mark its parents
+			 * as uninteresting commits _only_ if they are
+			 * already parsed.  No reason to find new ones
+			 * here.
+			 */
+			parents = c->parents;
+			while (parents) {
+				struct commit *p = parents->item;
+				parents = parents->next;
+				if (!(p->object.flags & UNINTERESTING)) {
+					p->object.flags |= UNINTERESTING;
+					changed = 1;
+				}
+			}
+		}
+		if (!changed)
+			break;
+	}
 }
 
-static void show_one_commit(struct commit *commit)
+static void show_one_commit(struct commit *commit, int no_name)
 {
-	char pretty[128], *cp;
+	char pretty[256], *cp;
 	struct commit_name *name = commit->object.util;
-	pretty_print_commit(CMIT_FMT_ONELINE, commit->buffer, ~0,
-			    pretty, sizeof(pretty));
+	if (commit->object.parsed)
+		pretty_print_commit(CMIT_FMT_ONELINE, commit->buffer, ~0,
+				    pretty, sizeof(pretty));
+	else
+		strcpy(pretty, "(unavailable)");
 	if (!strncmp(pretty, "[PATCH] ", 8))
 		cp = pretty + 8;
 	else
 		cp = pretty;
-	if (name && name->head_name) {
-		printf("[%s", name->head_name);
-		if (name->generation)
-			printf("~%d", name->generation);
-		printf("] ");
+
+	if (!no_name) {
+		if (name && name->head_name) {
+			printf("[%s", name->head_name);
+			if (name->generation) {
+				if (name->generation == 1)
+					printf("^");
+				else
+					printf("~%d", name->generation);
+			}
+			printf("] ");
+		}
+		else
+			printf("[%s] ",
+			       find_unique_abbrev(commit->object.sha1, 7));
 	}
 	puts(cp);
 }
@@ -231,7 +301,7 @@ static int append_ref(const char *refname, const unsigned char *sha1)
 	struct commit *commit = lookup_commit_reference_gently(sha1, 1);
 	if (!commit)
 		return 0;
-	if (MAX_REVS < ref_name_cnt) {
+	if (MAX_REVS <= ref_name_cnt) {
 		fprintf(stderr, "warning: ignoring %s; "
 			"cannot handle more than %d refs",
 			refname, MAX_REVS);
@@ -244,9 +314,16 @@ static int append_ref(const char *refname, const unsigned char *sha1)
 
 static int append_head_ref(const char *refname, const unsigned char *sha1)
 {
-	if (strncmp(refname, "refs/heads/", 11))
+	unsigned char tmp[20];
+	int ofs = 11;
+	if (strncmp(refname, "refs/heads/", ofs))
 		return 0;
-	return append_ref(refname + 11, sha1);
+	/* If both heads/foo and tags/foo exists, get_sha1 would
+	 * get confused.
+	 */
+	if (get_sha1(refname + ofs, tmp) || memcmp(tmp, sha1, 20))
+		ofs = 5;
+	return append_ref(refname + ofs, sha1);
 }
 
 static int append_tag_ref(const char *refname, const unsigned char *sha1)
@@ -256,6 +333,39 @@ static int append_tag_ref(const char *refname, const unsigned char *sha1)
 	return append_ref(refname + 5, sha1);
 }
 
+static const char *match_ref_pattern = NULL;
+static int match_ref_slash = 0;
+static int count_slash(const char *s)
+{
+	int cnt = 0;
+	while (*s)
+		if (*s++ == '/')
+			cnt++;
+	return cnt;
+}
+
+static int append_matching_ref(const char *refname, const unsigned char *sha1)
+{
+	/* we want to allow pattern hold/<asterisk> to show all
+	 * branches under refs/heads/hold/, and v0.99.9? to show
+	 * refs/tags/v0.99.9a and friends.
+	 */
+	const char *tail;
+	int slash = count_slash(refname);
+	for (tail = refname; *tail && match_ref_slash < slash; )
+		if (*tail++ == '/')
+			slash--;
+	if (!*tail)
+		return 0;
+	if (fnmatch(match_ref_pattern, tail, 0))
+		return 0;
+	if (!strncmp("refs/heads/", refname, 11))
+		return append_head_ref(refname, sha1);
+	if (!strncmp("refs/tags/", refname, 10))
+		return append_tag_ref(refname, sha1);
+	return append_ref(refname, sha1);
+}
+
 static void snarf_refs(int head, int tag)
 {
 	if (head) {
@@ -291,6 +401,7 @@ static int show_merge_base(struct commit_list *seen, int num_rev)
 {
 	int all_mask = ((1u << (REV_SHIFT + num_rev)) - 1);
 	int all_revs = all_mask & ~((1u << REV_SHIFT) - 1);
+	int exit_status = 1;
 
 	while (seen) {
 		struct commit *commit = pop_one_commit(&seen);
@@ -298,24 +409,74 @@ static int show_merge_base(struct commit_list *seen, int num_rev)
 		if (!(flags & UNINTERESTING) &&
 		    ((flags & all_revs) == all_revs)) {
 			puts(sha1_to_hex(commit->object.sha1));
-			return 0;
+			exit_status = 0;
+			commit->object.flags |= UNINTERESTING;
 		}
 	}
-	return 1;
+	return exit_status;
+}
+
+static int show_independent(struct commit **rev,
+			    int num_rev,
+			    char **ref_name,
+			    unsigned int *rev_mask)
+{
+	int i;
+
+	for (i = 0; i < num_rev; i++) {
+		struct commit *commit = rev[i];
+		unsigned int flag = rev_mask[i];
+
+		if (commit->object.flags == flag)
+			puts(sha1_to_hex(commit->object.sha1));
+		commit->object.flags |= UNINTERESTING;
+	}
+	return 0;
+}
+
+static void append_one_rev(const char *av)
+{
+	unsigned char revkey[20];
+	if (!get_sha1(av, revkey)) {
+		append_ref(av, revkey);
+		return;
+	}
+	if (strchr(av, '*') || strchr(av, '?')) {
+		/* glob style match */
+		int saved_matches = ref_name_cnt;
+		match_ref_pattern = av;
+		match_ref_slash = count_slash(av);
+		for_each_ref(append_matching_ref);
+		if (saved_matches == ref_name_cnt &&
+		    ref_name_cnt < MAX_REVS)
+			error("no matching refs with %s", av);
+		if (saved_matches + 1 < ref_name_cnt)
+			sort_ref_range(saved_matches, ref_name_cnt);
+		return;
+	}
+	die("bad sha1 reference %s", av);
 }
 
 int main(int ac, char **av)
 {
 	struct commit *rev[MAX_REVS], *commit;
 	struct commit_list *list = NULL, *seen = NULL;
+	unsigned int rev_mask[MAX_REVS];
 	int num_rev, i, extra = 0;
 	int all_heads = 0, all_tags = 0;
-	int all_mask, all_revs, shown_merge_point;
+	int all_mask, all_revs;
 	char head_path[128];
+	const char *head_path_p;
 	int head_path_len;
 	unsigned char head_sha1[20];
 	int merge_base = 0;
-	char **label;
+	int independent = 0;
+	int no_name = 0;
+	int sha1_name = 0;
+	int shown_merge_point = 0;
+	int topo_order = 0;
+
+	setup_git_directory();
 
 	while (1 < ac && av[1][0] == '-') {
 		char *arg = av[1];
@@ -327,41 +488,56 @@ int main(int ac, char **av)
 			all_tags = 1;
 		else if (!strcmp(arg, "--more"))
 			extra = 1;
-		else if (!strncmp(arg, "--more=", 7)) {
+		else if (!strcmp(arg, "--list"))
+			extra = -1;
+		else if (!strcmp(arg, "--no-name"))
+			no_name = 1;
+		else if (!strcmp(arg, "--sha1-name"))
+			sha1_name = 1;
+		else if (!strncmp(arg, "--more=", 7))
 			extra = atoi(arg + 7);
-			if (extra < 0)
-				usage(show_branch_usage);
-		}
 		else if (!strcmp(arg, "--merge-base"))
 			merge_base = 1;
+		else if (!strcmp(arg, "--independent"))
+			independent = 1;
+		else if (!strcmp(arg, "--topo-order"))
+			topo_order = 1;
 		else
 			usage(show_branch_usage);
 		ac--; av++;
 	}
 	ac--; av++;
 
+	/* Only one of these is allowed */
+	if (1 < independent + merge_base + (extra != 0))
+		usage(show_branch_usage);
+
 	if (all_heads + all_tags)
 		snarf_refs(all_heads, all_tags);
 
-	while (0 < ac) {
-		unsigned char revkey[20];
-		if (get_sha1(*av, revkey))
-			die("bad sha1 reference %s", *av);
-		append_ref(*av, revkey);
-		ac--; av++;
+	if (ac) {
+		while (0 < ac) {
+			append_one_rev(*av);
+			ac--; av++;
+		}
 	}
-
-	/* If still no revs, then add heads */
-	if (!ref_name_cnt)
+	else {
+		/* If no revs given, then add heads */
 		snarf_refs(1, 0);
+	}
+	if (!ref_name_cnt) {
+		fprintf(stderr, "No revs to be shown.\n");
+		exit(0);
+	}
 
 	for (num_rev = 0; ref_name[num_rev]; num_rev++) {
 		unsigned char revkey[20];
+		unsigned int flag = 1u << (num_rev + REV_SHIFT);
 
 		if (MAX_REVS <= num_rev)
 			die("cannot handle more than %d revs.", MAX_REVS);
 		if (get_sha1(ref_name[num_rev], revkey))
-			usage(show_branch_usage);
+			die("'%s' is not a valid ref.\n", ref_name[num_rev]);
 		commit = lookup_commit_reference(revkey);
 		if (!commit)
 			die("cannot find commit %s (%s)",
@@ -373,23 +549,35 @@ int main(int ac, char **av)
 		 * and so on.  REV_SHIFT bits from bit 0 are used for
 		 * internal bookkeeping.
 		 */
-		commit->object.flags |= 1u << (num_rev + REV_SHIFT);
-		insert_by_date(commit, &list);
+		commit->object.flags |= flag;
+		if (commit->object.flags == flag)
+			insert_by_date(commit, &list);
 		rev[num_rev] = commit;
 	}
-	join_revs(&list, &seen, num_rev, extra);
+	for (i = 0; i < num_rev; i++)
+		rev_mask[i] = rev[i]->object.flags;
 
-	head_path_len = readlink(".git/HEAD", head_path, sizeof(head_path)-1);
-	if ((head_path_len < 0) || get_sha1("HEAD", head_sha1))
+	if (0 <= extra)
+		join_revs(&list, &seen, num_rev, extra);
+
+	head_path_p = resolve_ref(git_path("HEAD"), head_sha1, 1);
+	if (head_path_p) {
+		head_path_len = strlen(head_path_p);
+		memcpy(head_path, head_path_p, head_path_len + 1);
+	}
+	else {
+		head_path_len = 0;
 		head_path[0] = 0;
-	else
-		head_path[head_path_len] = 0;
+	}
 
 	if (merge_base)
 		return show_merge_base(seen, num_rev);
 
-	/* Show list */
-	if (1 < num_rev) {
+	if (independent)
+		return show_independent(rev, num_rev, ref_name, rev_mask);
+
+	/* Show list; --more=-1 means list-only */
+	if (1 < num_rev || extra < 0) {
 		for (i = 0; i < num_rev; i++) {
 			int j;
 			int is_head = rev_is_head(head_path,
@@ -397,34 +585,43 @@ int main(int ac, char **av)
 						  ref_name[i],
 						  head_sha1,
 						  rev[i]->object.sha1);
-			for (j = 0; j < i; j++)
-				putchar(' ');
-			printf("%c [%s] ", is_head ? '*' : '!', ref_name[i]);
-			show_one_commit(rev[i]);
+			if (extra < 0)
+				printf("%c [%s] ",
+				       is_head ? '*' : ' ', ref_name[i]);
+			else {
+				for (j = 0; j < i; j++)
+					putchar(' ');
+				printf("%c [%s] ",
+				       is_head ? '*' : '!', ref_name[i]);
+			}
+			/* header lines never need name */
+			show_one_commit(rev[i], 1);
+		}
+		if (0 <= extra) {
+			for (i = 0; i < num_rev; i++)
+				putchar('-');
+			putchar('\n');
 		}
-		for (i = 0; i < num_rev; i++)
-			putchar('-');
-		putchar('\n');
 	}
+	if (extra < 0)
+		exit(0);
 
 	/* Sort topologically */
-	sort_in_topological_order(&seen);
+	if (topo_order)
+		sort_in_topological_order(&seen);
 
 	/* Give names to commits */
-	name_commits(seen, rev, ref_name, num_rev);
+	if (!sha1_name && !no_name)
+		name_commits(seen, rev, ref_name, num_rev);
 
 	all_mask = ((1u << (REV_SHIFT + num_rev)) - 1);
 	all_revs = all_mask & ~((1u << REV_SHIFT) - 1);
-	shown_merge_point = 0;
 
 	while (seen) {
 		struct commit *commit = pop_one_commit(&seen);
 		int this_flag = commit->object.flags;
-		int is_merge_point = (this_flag & all_revs) == all_revs;
-		static char *obvious[] = { "" };
 
-		if (is_merge_point)
-			shown_merge_point = 1;
+		shown_merge_point |= ((this_flag & all_revs) == all_revs);
 
 		if (1 < num_rev) {
 			for (i = 0; i < num_rev; i++)
@@ -432,12 +629,10 @@ int main(int ac, char **av)
 					? '+' : ' ');
 			putchar(' ');
 		}
-		show_one_commit(commit);
-		if (num_rev == 1)
-			label = obvious;
-		if (shown_merge_point && is_merge_point)
-			if (--extra < 0)
-				break;
+		show_one_commit(commit, no_name);
+
+		if (shown_merge_point && --extra < 0)
+			break;
 	}
 	return 0;
 }