[PATCH v8 3/9] repack: refactor finishing pack-objects command

[Christian Couder <christian.couder@gmail.com>]

Create a new finish_pack_objects_cmd() to refactor duplicated code
that handles reading the packfile names from the output of a
`git pack-objects` command and putting it into a string_list, as well as
calling finish_command().

While at it, beautify a code comment a bit in the new function.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org
---
 builtin/repack.c | 70 +++++++++++++++++++++++-------------------------
 1 file changed, 33 insertions(+), 37 deletions(-)

diff --git a/builtin/repack.c b/builtin/repack.c
index 529e13120d..d0ab55c0d9 100644
--- a/builtin/repack.c
+++ b/builtin/repack.c
@@ -806,6 +806,36 @@ static void remove_redundant_bitmaps(struct string_list *include,
 	strbuf_release(&path);
 }
 
+static int finish_pack_objects_cmd(struct child_process *cmd,
+				   struct string_list *names,
+				   int local)
+{
+	FILE *out;
+	struct strbuf line = STRBUF_INIT;
+
+	out = xfdopen(cmd->out, "r");
+	while (strbuf_getline_lf(&line, out) != EOF) {
+		struct string_list_item *item;
+
+		if (line.len != the_hash_algo->hexsz)
+			die(_("repack: Expecting full hex object ID lines only "
+			      "from pack-objects."));
+		/*
+		 * Avoid putting packs written outside of the repository in the
+		 * list of names.
+		 */
+		if (local) {
+			item = string_list_append(names, line.buf);
+			item->util = populate_pack_exts(line.buf);
+		}
+	}
+	fclose(out);
+
+	strbuf_release(&line);
+
+	return finish_command(cmd);
+}
+
 static int write_cruft_pack(const struct pack_objects_args *args,
 			    const char *destination,
 			    const char *pack_prefix,
@@ -814,9 +844,8 @@ static int write_cruft_pack(const struct pack_objects_args *args,
 			    struct existing_packs *existing)
 {
 	struct child_process cmd = CHILD_PROCESS_INIT;
-	struct strbuf line = STRBUF_INIT;
 	struct string_list_item *item;
-	FILE *in, *out;
+	FILE *in;
 	int ret;
 	const char *scratch;
 	int local = skip_prefix(destination, packdir, &scratch);
@@ -861,27 +890,7 @@ static int write_cruft_pack(const struct pack_objects_args *args,
 		fprintf(in, "%s.pack\n", item->string);
 	fclose(in);
 
-	out = xfdopen(cmd.out, "r");
-	while (strbuf_getline_lf(&line, out) != EOF) {
-		struct string_list_item *item;
-
-		if (line.len != the_hash_algo->hexsz)
-			die(_("repack: Expecting full hex object ID lines only "
-			      "from pack-objects."));
-		/*
-		 * avoid putting packs written outside of the repository in the
-		 * list of names
-		 */
-		if (local) {
-			item = string_list_append(names, line.buf);
-			item->util = populate_pack_exts(line.buf);
-		}
-	}
-	fclose(out);
-
-	strbuf_release(&line);
-
-	return finish_command(&cmd);
+	return finish_pack_objects_cmd(&cmd, names, local);
 }
 
 int cmd_repack(int argc, const char **argv, const char *prefix)
@@ -891,10 +900,8 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
 	struct string_list names = STRING_LIST_INIT_DUP;
 	struct existing_packs existing = EXISTING_PACKS_INIT;
 	struct pack_geometry geometry = { 0 };
-	struct strbuf line = STRBUF_INIT;
 	struct tempfile *refs_snapshot = NULL;
 	int i, ext, ret;
-	FILE *out;
 	int show_progress;
 
 	/* variables to be filled by option parsing */
@@ -1124,18 +1131,7 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
 		fclose(in);
 	}
 
-	out = xfdopen(cmd.out, "r");
-	while (strbuf_getline_lf(&line, out) != EOF) {
-		struct string_list_item *item;
-
-		if (line.len != the_hash_algo->hexsz)
-			die(_("repack: Expecting full hex object ID lines only from pack-objects."));
-		item = string_list_append(&names, line.buf);
-		item->util = populate_pack_exts(item->string);
-	}
-	strbuf_release(&line);
-	fclose(out);
-	ret = finish_command(&cmd);
+	ret = finish_pack_objects_cmd(&cmd, &names, 1);
 	if (ret)
 		goto cleanup;
 
-- 
2.42.0.305.g5bfd918c90