1 files changed, 51 insertions, 0 deletions
diff --git a/repack-filtered.c b/repack-filtered.c
new file mode 100644
index 0000000000..edcf7667c5
--- /dev/null
+++ b/repack-filtered.c
@@ -0,0 +1,51 @@
+#include "git-compat-util.h"
+#include "repack.h"
+#include "repository.h"
+#include "run-command.h"
+#include "string-list.h"
+
+int write_filtered_pack(const struct write_pack_opts *opts,
+			struct existing_packs *existing,
+			struct string_list *names)
+{
+	struct child_process cmd = CHILD_PROCESS_INIT;
+	struct string_list_item *item;
+	FILE *in;
+	int ret;
+	const char *caret;
+	const char *pack_prefix = write_pack_opts_pack_prefix(opts);
+
+	prepare_pack_objects(&cmd, opts->po_args, opts->destination);
+
+	strvec_push(&cmd.args, "--stdin-packs");
+
+	for_each_string_list_item(item, &existing->kept_packs)
+		strvec_pushf(&cmd.args, "--keep-pack=%s", item->string);
+
+	cmd.in = -1;
+
+	ret = start_command(&cmd);
+	if (ret)
+		return ret;
+
+	/*
+	 * Here 'names' contains only the pack(s) that were just
+	 * written, which is exactly the packs we want to keep. Also
+	 * 'existing_kept_packs' already contains the packs in
+	 * 'keep_pack_list'.
+	 */
+	in = xfdopen(cmd.in, "w");
+	for_each_string_list_item(item, names)
+		fprintf(in, "^%s-%s.pack\n", pack_prefix, item->string);
+	for_each_string_list_item(item, &existing->non_kept_packs)
+		fprintf(in, "%s.pack\n", item->string);
+	for_each_string_list_item(item, &existing->cruft_packs)
+		fprintf(in, "%s.pack\n", item->string);
+	caret = opts->po_args->pack_kept_objects ? "" : "^";
+	for_each_string_list_item(item, &existing->kept_packs)
+		fprintf(in, "%s%s.pack\n", caret, item->string);
+	fclose(in);
+
+	return finish_pack_objects_cmd(existing->repo->hash_algo, opts, &cmd,
+				       names);
+}