merge(3p/git): Merge git subtree at v2.29.2 r/1890

This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because
there is some breakage in the git build related to the netrc
credentials helper which someone has taken care of in nixpkgs.

The stable channel is not used for anything other than git, so this
should be fine.

Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb

1 files changed, 16 insertions, 14 deletions

diff --git a/third_party/git/builtin/replace.c b/third_party/git/builtin/replace.c
index 644b21ca8d..cd48765911 100644
--- a/third_party/git/builtin/replace.c
+++ b/third_party/git/builtin/replace.c
@@ -228,13 +228,13 @@ static int export_object(const struct object_id *oid, enum object_type type,
 	if (fd < 0)
 		return error_errno(_("unable to open %s for writing"), filename);
 
-	argv_array_push(&cmd.args, "--no-replace-objects");
-	argv_array_push(&cmd.args, "cat-file");
+	strvec_push(&cmd.args, "--no-replace-objects");
+	strvec_push(&cmd.args, "cat-file");
 	if (raw)
-		argv_array_push(&cmd.args, type_name(type));
+		strvec_push(&cmd.args, type_name(type));
 	else
-		argv_array_push(&cmd.args, "-p");
-	argv_array_push(&cmd.args, oid_to_hex(oid));
+		strvec_push(&cmd.args, "-p");
+	strvec_push(&cmd.args, oid_to_hex(oid));
 	cmd.git_cmd = 1;
 	cmd.out = fd;
 
@@ -272,7 +272,7 @@ static int import_object(struct object_id *oid, enum object_type type,
 			return error(_("unable to spawn mktree"));
 		}
 
-		if (strbuf_read(&result, cmd.out, 41) < 0) {
+		if (strbuf_read(&result, cmd.out, the_hash_algo->hexsz + 1) < 0) {
 			error_errno(_("unable to read from mktree"));
 			close(fd);
 			close(cmd.out);
@@ -358,14 +358,15 @@ static int replace_parents(struct strbuf *buf, int argc, const char **argv)
 	struct strbuf new_parents = STRBUF_INIT;
 	const char *parent_start, *parent_end;
 	int i;
+	const unsigned hexsz = the_hash_algo->hexsz;
 
 	/* find existing parents */
 	parent_start = buf->buf;
-	parent_start += GIT_SHA1_HEXSZ + 6; /* "tree " + "hex sha1" + "\n" */
+	parent_start += hexsz + 6; /* "tree " + "hex sha1" + "\n" */
 	parent_end = parent_start;
 
 	while (starts_with(parent_end, "parent "))
-		parent_end += 48; /* "parent " + "hex sha1" + "\n" */
+		parent_end += hexsz + 8; /* "parent " + "hex sha1" + "\n" */
 
 	/* prepare new parents */
 	for (i = 0; i < argc; i++) {
@@ -408,7 +409,8 @@ static int check_one_mergetag(struct commit *commit,
 	struct tag *tag;
 	int i;
 
-	hash_object_file(extra->value, extra->len, type_name(OBJ_TAG), &tag_oid);
+	hash_object_file(the_hash_algo, extra->value, extra->len,
+			 type_name(OBJ_TAG), &tag_oid);
 	tag = lookup_tag(the_repository, &tag_oid);
 	if (!tag)
 		return error(_("bad mergetag in commit '%s'"), ref);
@@ -421,7 +423,7 @@ static int check_one_mergetag(struct commit *commit,
 		if (get_oid(mergetag_data->argv[i], &oid) < 0)
 			return error(_("not a valid object name: '%s'"),
 				     mergetag_data->argv[i]);
-		if (oideq(&tag->tagged->oid, &oid))
+		if (oideq(get_tagged_oid(tag), &oid))
 			return 0; /* found */
 	}
 
@@ -500,7 +502,7 @@ static int convert_graft_file(int force)
 	const char *graft_file = get_graft_file(the_repository);
 	FILE *fp = fopen_or_warn(graft_file, "r");
 	struct strbuf buf = STRBUF_INIT, err = STRBUF_INIT;
-	struct argv_array args = ARGV_ARRAY_INIT;
+	struct strvec args = STRVEC_INIT;
 
 	if (!fp)
 		return -1;
@@ -510,10 +512,10 @@ static int convert_graft_file(int force)
 		if (*buf.buf == '#')
 			continue;
 
-		argv_array_split(&args, buf.buf);
-		if (args.argc && create_graft(args.argc, args.argv, force, 1))
+		strvec_split(&args, buf.buf);
+		if (args.nr && create_graft(args.nr, args.v, force, 1))
 			strbuf_addf(&err, "\n\t%s", buf.buf);
-		argv_array_clear(&args);
+		strvec_clear(&args);
 	}
 	fclose(fp);