1 files changed, 63 insertions, 70 deletions

diff --git a/builtin/show-branch.c b/builtin/show-branch.c
index e69fb7c489..25669357e9 100644
--- a/builtin/show-branch.c
+++ b/builtin/show-branch.c
@@ -3,6 +3,7 @@
 #include "refs.h"
 #include "builtin.h"
 #include "color.h"
+#include "argv-array.h"
 #include "parse-options.h"
 
 static const char* show_branch_usage[] = {
@@ -16,9 +17,7 @@ static const char* show_branch_usage[] = {
 
 static int showbranch_use_color = -1;
 
-static int default_num;
-static int default_alloc;
-static const char **default_arg;
+static struct argv_array default_args = ARGV_ARRAY_INIT;
 
 #define UNINTERESTING	01
 
@@ -53,17 +52,6 @@ static struct commit *interesting(struct commit_list *list)
 	return NULL;
 }
 
-static struct commit *pop_one_commit(struct commit_list **list_p)
-{
-	struct commit *commit;
-	struct commit_list *list;
-	list = *list_p;
-	commit = list->item;
-	*list_p = list->next;
-	free(list);
-	return commit;
-}
-
 struct commit_name {
 	const char *head_name; /* which head's ancestor? */
 	int generation; /* how many parents away from head_name */
@@ -213,7 +201,7 @@ 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);
+		struct commit *commit = pop_commit(list_p);
 		int flags = commit->object.flags & all_mask;
 
 		if (!still_interesting && extra <= 0)
@@ -303,7 +291,7 @@ static void show_one_commit(struct commit *commit, int no_name)
 		}
 		else
 			printf("[%s] ",
-			       find_unique_abbrev(commit->object.sha1,
+			       find_unique_abbrev(commit->object.oid.hash,
 						  DEFAULT_ABBREV));
 	}
 	puts(pretty_str);
@@ -369,10 +357,10 @@ static void sort_ref_range(int bottom, int top)
 	      compare_ref_name);
 }
 
-static int append_ref(const char *refname, const unsigned char *sha1,
+static int append_ref(const char *refname, const struct object_id *oid,
 		      int allow_dups)
 {
-	struct commit *commit = lookup_commit_reference_gently(sha1, 1);
+	struct commit *commit = lookup_commit_reference_gently(oid->hash, 1);
 	int i;
 
 	if (!commit)
@@ -394,39 +382,42 @@ static int append_ref(const char *refname, const unsigned char *sha1,
 	return 0;
 }
 
-static int append_head_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
+static int append_head_ref(const char *refname, const struct object_id *oid,
+			   int flag, void *cb_data)
 {
-	unsigned char tmp[20];
+	struct object_id tmp;
 	int ofs = 11;
 	if (!starts_with(refname, "refs/heads/"))
 		return 0;
 	/* If both heads/foo and tags/foo exists, get_sha1 would
 	 * get confused.
 	 */
-	if (get_sha1(refname + ofs, tmp) || hashcmp(tmp, sha1))
+	if (get_sha1(refname + ofs, tmp.hash) || oidcmp(&tmp, oid))
 		ofs = 5;
-	return append_ref(refname + ofs, sha1, 0);
+	return append_ref(refname + ofs, oid, 0);
 }
 
-static int append_remote_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
+static int append_remote_ref(const char *refname, const struct object_id *oid,
+			     int flag, void *cb_data)
 {
-	unsigned char tmp[20];
+	struct object_id tmp;
 	int ofs = 13;
 	if (!starts_with(refname, "refs/remotes/"))
 		return 0;
 	/* If both heads/foo and tags/foo exists, get_sha1 would
 	 * get confused.
 	 */
-	if (get_sha1(refname + ofs, tmp) || hashcmp(tmp, sha1))
+	if (get_sha1(refname + ofs, tmp.hash) || oidcmp(&tmp, oid))
 		ofs = 5;
-	return append_ref(refname + ofs, sha1, 0);
+	return append_ref(refname + ofs, oid, 0);
 }
 
-static int append_tag_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
+static int append_tag_ref(const char *refname, const struct object_id *oid,
+			  int flag, void *cb_data)
 {
 	if (!starts_with(refname, "refs/tags/"))
 		return 0;
-	return append_ref(refname + 5, sha1, 0);
+	return append_ref(refname + 5, oid, 0);
 }
 
 static const char *match_ref_pattern = NULL;
@@ -440,7 +431,8 @@ static int count_slash(const char *s)
 	return cnt;
 }
 
-static int append_matching_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
+static int append_matching_ref(const char *refname, const struct object_id *oid,
+			       int flag, void *cb_data)
 {
 	/* we want to allow pattern hold/<asterisk> to show all
 	 * branches under refs/heads/hold/, and v0.99.9? to show
@@ -456,21 +448,23 @@ static int append_matching_ref(const char *refname, const unsigned char *sha1, i
 	if (wildmatch(match_ref_pattern, tail, 0, NULL))
 		return 0;
 	if (starts_with(refname, "refs/heads/"))
-		return append_head_ref(refname, sha1, flag, cb_data);
+		return append_head_ref(refname, oid, flag, cb_data);
 	if (starts_with(refname, "refs/tags/"))
-		return append_tag_ref(refname, sha1, flag, cb_data);
-	return append_ref(refname, sha1, 0);
+		return append_tag_ref(refname, oid, flag, cb_data);
+	return append_ref(refname, oid, 0);
 }
 
 static void snarf_refs(int head, int remotes)
 {
 	if (head) {
 		int orig_cnt = ref_name_cnt;
+
 		for_each_ref(append_head_ref, NULL);
 		sort_ref_range(orig_cnt, ref_name_cnt);
 	}
 	if (remotes) {
 		int orig_cnt = ref_name_cnt;
+
 		for_each_ref(append_remote_ref, NULL);
 		sort_ref_range(orig_cnt, ref_name_cnt);
 	}
@@ -498,11 +492,11 @@ static int show_merge_base(struct commit_list *seen, int num_rev)
 	int exit_status = 1;
 
 	while (seen) {
-		struct commit *commit = pop_one_commit(&seen);
+		struct commit *commit = pop_commit(&seen);
 		int flags = commit->object.flags & all_mask;
 		if (!(flags & UNINTERESTING) &&
 		    ((flags & all_revs) == all_revs)) {
-			puts(sha1_to_hex(commit->object.sha1));
+			puts(oid_to_hex(&commit->object.oid));
 			exit_status = 0;
 			commit->object.flags |= UNINTERESTING;
 		}
@@ -522,7 +516,7 @@ static int show_independent(struct commit **rev,
 		unsigned int flag = rev_mask[i];
 
 		if (commit->object.flags == flag)
-			puts(sha1_to_hex(commit->object.sha1));
+			puts(oid_to_hex(&commit->object.oid));
 		commit->object.flags |= UNINTERESTING;
 	}
 	return 0;
@@ -530,14 +524,15 @@ static int show_independent(struct commit **rev,
 
 static void append_one_rev(const char *av)
 {
-	unsigned char revkey[20];
-	if (!get_sha1(av, revkey)) {
-		append_ref(av, revkey, 0);
+	struct object_id revkey;
+	if (!get_sha1(av, revkey.hash)) {
+		append_ref(av, &revkey, 0);
 		return;
 	}
 	if (strchr(av, '*') || 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, NULL);
@@ -560,16 +555,9 @@ static int git_show_branch_config(const char *var, const char *value, void *cb)
 		 * default_arg is now passed to parse_options(), so we need to
 		 * mimic the real argv a bit better.
 		 */
-		if (!default_num) {
-			default_alloc = 20;
-			default_arg = xcalloc(default_alloc, sizeof(*default_arg));
-			default_arg[default_num++] = "show-branch";
-		} else if (default_alloc <= default_num + 1) {
-			default_alloc = default_alloc * 3 / 2 + 20;
-			REALLOC_ARRAY(default_arg, default_alloc);
-		}
-		default_arg[default_num++] = xstrdup(value);
-		default_arg[default_num] = NULL;
+		if (!default_args.argc)
+			argv_array_push(&default_args, "show-branch");
+		argv_array_push(&default_args, value);
 		return 0;
 	}
 
@@ -636,7 +624,7 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
 	char head[128];
 	const char *head_p;
 	int head_len;
-	unsigned char head_sha1[20];
+	struct object_id head_oid;
 	int merge_base = 0;
 	int independent = 0;
 	int no_name = 0;
@@ -689,9 +677,9 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
 	git_config(git_show_branch_config, NULL);
 
 	/* If nothing is specified, try the default first */
-	if (ac == 1 && default_num) {
-		ac = default_num;
-		av = default_arg;
+	if (ac == 1 && default_args.argc) {
+		ac = default_args.argc;
+		av = default_args.argv;
 	}
 
 	ac = parse_options(ac, av, prefix, builtin_show_branch_options,
@@ -722,8 +710,7 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
 		all_heads = 1;
 
 	if (reflog) {
-		unsigned char sha1[20];
-		char nth_desc[256];
+		struct object_id oid;
 		char *ref;
 		int base = 0;
 		unsigned int flags = 0;
@@ -733,10 +720,12 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
 
 			fake_av[0] = resolve_refdup("HEAD",
 						    RESOLVE_REF_READING,
-						    sha1, NULL);
+						    oid.hash, NULL);
 			fake_av[1] = NULL;
 			av = fake_av;
 			ac = 1;
+			if (!*av)
+				die("no branches given, and HEAD is not valid");
 		}
 		if (ac != 1)
 			die("--reflog option needs one branch name");
@@ -744,7 +733,7 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
 		if (MAX_REVS < reflog)
 			die("Only %d entries can be shown at one time.",
 			    MAX_REVS);
-		if (!dwim_ref(*av, strlen(*av), sha1, &ref))
+		if (!dwim_ref(*av, strlen(*av), oid.hash, &ref))
 			die("No such ref %s", *av);
 
 		/* Has the base been specified? */
@@ -755,18 +744,19 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
 				/* Ah, that is a date spec... */
 				unsigned long at;
 				at = approxidate(reflog_base);
-				read_ref_at(ref, flags, at, -1, sha1, NULL,
+				read_ref_at(ref, flags, at, -1, oid.hash, NULL,
 					    NULL, NULL, &base);
 			}
 		}
 
 		for (i = 0; i < reflog; i++) {
 			char *logmsg;
+			char *nth_desc;
 			const char *msg;
 			unsigned long timestamp;
 			int tz;
 
-			if (read_ref_at(ref, flags, 0, base+i, sha1, &logmsg,
+			if (read_ref_at(ref, flags, 0, base+i, oid.hash, &logmsg,
 					&timestamp, &tz, NULL)) {
 				reflog = i;
 				break;
@@ -777,11 +767,14 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
 			else
 				msg++;
 			reflog_msg[i] = xstrfmt("(%s) %s",
-						show_date(timestamp, tz, 1),
+						show_date(timestamp, tz,
+							  DATE_MODE(RELATIVE)),
 						msg);
 			free(logmsg);
-			sprintf(nth_desc, "%s@{%d}", *av, base+i);
-			append_ref(nth_desc, sha1, 1);
+
+			nth_desc = xstrfmt("%s@{%d}", *av, base+i);
+			append_ref(nth_desc, &oid, 1);
+			free(nth_desc);
 		}
 		free(ref);
 	}
@@ -795,7 +788,7 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
 	}
 
 	head_p = resolve_ref_unsafe("HEAD", RESOLVE_REF_READING,
-				    head_sha1, NULL);
+				    head_oid.hash, NULL);
 	if (head_p) {
 		head_len = strlen(head_p);
 		memcpy(head, head_p, head_len + 1);
@@ -814,7 +807,7 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
 			if (rev_is_head(head,
 					head_len,
 					ref_name[i],
-					head_sha1, NULL))
+					head_oid.hash, NULL))
 				has_head++;
 		}
 		if (!has_head) {
@@ -829,17 +822,17 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
 	}
 
 	for (num_rev = 0; ref_name[num_rev]; num_rev++) {
-		unsigned char revkey[20];
+		struct object_id revkey;
 		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))
+		if (get_sha1(ref_name[num_rev], revkey.hash))
 			die("'%s' is not a valid ref.", ref_name[num_rev]);
-		commit = lookup_commit_reference(revkey);
+		commit = lookup_commit_reference(revkey.hash);
 		if (!commit)
 			die("cannot find commit %s (%s)",
-			    ref_name[num_rev], revkey);
+			    ref_name[num_rev], oid_to_hex(&revkey));
 		parse_commit(commit);
 		mark_seen(commit, &seen);
 
@@ -873,8 +866,8 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
 			int is_head = rev_is_head(head,
 						  head_len,
 						  ref_name[i],
-						  head_sha1,
-						  rev[i]->object.sha1);
+						  head_oid.hash,
+						  rev[i]->object.oid.hash);
 			if (extra < 0)
 				printf("%c [%s] ",
 				       is_head ? '*' : ' ', ref_name[i]);
@@ -917,7 +910,7 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
 	all_revs = all_mask & ~((1u << REV_SHIFT) - 1);
 
 	while (seen) {
-		struct commit *commit = pop_one_commit(&seen);
+		struct commit *commit = pop_commit(&seen);
 		int this_flag = commit->object.flags;
 		int is_merge_point = ((this_flag & all_revs) == all_revs);