repack: move `finish_pack_objects_cmd()` out of the builtin

In a similar spirit as the previous commit(s), now that the function
`finish_pack_objects_cmd()` has no explicit dependencies within the
repack builtin, let's extract it.

This prepares us to extract the remaining two functions within the
repack builtin that explicitly write packfiles, which are
`write_cruft_pack()` and `write_filtered_pack()`, which will be done in
the future commits.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/repack.c b/repack.c
index d2ee9f2460..2c478970f3 100644
--- a/repack.c
+++ b/repack.c
@@ -82,6 +82,39 @@ bool write_pack_opts_is_local(const struct write_pack_opts *opts)
 	return starts_with(opts->destination, opts->packdir);
 }
 
+int finish_pack_objects_cmd(const struct git_hash_algo *algop,
+			    const struct write_pack_opts *opts,
+			    struct child_process *cmd,
+			    struct string_list *names)
+{
+	FILE *out;
+	bool local = write_pack_opts_is_local(opts);
+	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 != algop->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 = generated_pack_populate(line.buf,
+							     opts->packtmp);
+		}
+	}
+	fclose(out);
+
+	strbuf_release(&line);
+
+	return finish_command(cmd);
+}
+
 #define DELETE_PACK 1
 #define RETAIN_PACK 2