Merge branch 'jk/strip-suffix'

* jk/strip-suffix:
  prepare_packed_git_one: refactor duplicate-pack check
  verify-pack: use strbuf_strip_suffix
  strbuf: implement strbuf_strip_suffix
  index-pack: use strip_suffix to avoid magic numbers
  use strip_suffix instead of ends_with in simple cases
  replace has_extension with ends_with
  implement ends_with via strip_suffix
  add strip_suffix function
  sha1_file: replace PATH_MAX buffer with strbuf in prepare_packed_git_one()

4 files changed, 26 insertions, 28 deletions

diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index 8b3bd29db..fc4041189 100644
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -1506,7 +1506,8 @@ int cmd_index_pack(int argc, const char **argv, const char *prefix)
 	const char *curr_index;
 	const char *index_name = NULL, *pack_name = NULL;
 	const char *keep_name = NULL, *keep_msg = NULL;
-	char *index_name_buf = NULL, *keep_name_buf = NULL;
+	struct strbuf index_name_buf = STRBUF_INIT,
+		      keep_name_buf = STRBUF_INIT;
 	struct pack_idx_entry **idx_objects;
 	struct pack_idx_option opts;
 	unsigned char pack_sha1[20];
@@ -1603,24 +1604,22 @@ int cmd_index_pack(int argc, const char **argv, const char *prefix)
 	if (fix_thin_pack && !from_stdin)
 		die(_("--fix-thin cannot be used without --stdin"));
 	if (!index_name && pack_name) {
-		int len = strlen(pack_name);
-		if (!has_extension(pack_name, ".pack"))
+		size_t len;
+		if (!strip_suffix(pack_name, ".pack", &len))
 			die(_("packfile name '%s' does not end with '.pack'"),
 			    pack_name);
-		index_name_buf = xmalloc(len);
-		memcpy(index_name_buf, pack_name, len - 5);
-		strcpy(index_name_buf + len - 5, ".idx");
-		index_name = index_name_buf;
+		strbuf_add(&index_name_buf, pack_name, len);
+		strbuf_addstr(&index_name_buf, ".idx");
+		index_name = index_name_buf.buf;
 	}
 	if (keep_msg && !keep_name && pack_name) {
-		int len = strlen(pack_name);
-		if (!has_extension(pack_name, ".pack"))
+		size_t len;
+		if (!strip_suffix(pack_name, ".pack", &len))
 			die(_("packfile name '%s' does not end with '.pack'"),
 			    pack_name);
-		keep_name_buf = xmalloc(len);
-		memcpy(keep_name_buf, pack_name, len - 5);
-		strcpy(keep_name_buf + len - 5, ".keep");
-		keep_name = keep_name_buf;
+		strbuf_add(&keep_name_buf, pack_name, len);
+		strbuf_addstr(&keep_name_buf, ".idx");
+		keep_name = keep_name_buf.buf;
 	}
 	if (verify) {
 		if (!index_name)
@@ -1668,8 +1667,8 @@ int cmd_index_pack(int argc, const char **argv, const char *prefix)
 	else
 		close(input_fd);
 	free(objects);
-	free(index_name_buf);
-	free(keep_name_buf);
+	strbuf_release(&index_name_buf);
+	strbuf_release(&keep_name_buf);
 	if (pack_name == NULL)
 		free((void *) curr_pack);
 	if (index_name == NULL)
diff --git a/builtin/remote.c b/builtin/remote.c
index a8efe3da4..8e1dc3916 100644
--- a/builtin/remote.c
+++ b/builtin/remote.c
@@ -263,16 +263,17 @@ static int config_read_branches(const char *key, const char *value, void *cb)
 		struct string_list_item *item;
 		struct branch_info *info;
 		enum { REMOTE, MERGE, REBASE } type;
+		size_t key_len;
 
 		key += 7;
-		if (ends_with(key, ".remote")) {
-			name = xstrndup(key, strlen(key) - 7);
+		if (strip_suffix(key, ".remote", &key_len)) {
+			name = xmemdupz(key, key_len);
 			type = REMOTE;
-		} else if (ends_with(key, ".merge")) {
-			name = xstrndup(key, strlen(key) - 6);
+		} else if (strip_suffix(key, ".merge", &key_len)) {
+			name = xmemdupz(key, key_len);
 			type = MERGE;
-		} else if (ends_with(key, ".rebase")) {
-			name = xstrndup(key, strlen(key) - 7);
+		} else if (strip_suffix(key, ".rebase", &key_len)) {
+			name = xmemdupz(key, key_len);
 			type = REBASE;
 		} else
 			return 0;
diff --git a/builtin/repack.c b/builtin/repack.c
index ff2216a7a..a77e743b9 100644
--- a/builtin/repack.c
+++ b/builtin/repack.c
@@ -83,16 +83,15 @@ static void get_non_kept_pack_filenames(struct string_list *fname_list)
 	DIR *dir;
 	struct dirent *e;
 	char *fname;
-	size_t len;
 
 	if (!(dir = opendir(packdir)))
 		return;
 
 	while ((e = readdir(dir)) != NULL) {
-		if (!ends_with(e->d_name, ".pack"))
+		size_t len;
+		if (!strip_suffix(e->d_name, ".pack", &len))
 			continue;
 
-		len = strlen(e->d_name) - strlen(".pack");
 		fname = xmemdupz(e->d_name, len);
 
 		if (!file_exists(mkpath("%s/%s.keep", packdir, fname)))
diff --git a/builtin/verify-pack.c b/builtin/verify-pack.c
index 66cd2df0f..972579f33 100644
--- a/builtin/verify-pack.c
+++ b/builtin/verify-pack.c
@@ -27,10 +27,9 @@ static int verify_one_pack(const char *path, unsigned int flags)
 	 * normalize these forms to "foo.pack" for "index-pack --verify".
 	 */
 	strbuf_addstr(&arg, path);
-	if (has_extension(arg.buf, ".idx"))
-		strbuf_splice(&arg, arg.len - 3, 3, "pack", 4);
-	else if (!has_extension(arg.buf, ".pack"))
-		strbuf_add(&arg, ".pack", 5);
+	if (strbuf_strip_suffix(&arg, ".idx") ||
+	    !ends_with(arg.buf, ".pack"))
+		strbuf_addstr(&arg, ".pack");
 	argv[2] = arg.buf;
 
 	memset(&index_pack, 0, sizeof(index_pack));