[PATCH v3 2/8] t/helper: add 'find-pack' test-tool

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

In a following commit, we will make it possible to separate objects in
different packfiles depending on a filter.

To make sure that the right objects are in the right packs, let's add a
new test-tool that can display which packfile(s) a given object is in.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
---
 Makefile                  |  1 +
 t/helper/test-find-pack.c | 35 +++++++++++++++++++++++++++++++++++
 t/helper/test-tool.c      |  1 +
 t/helper/test-tool.h      |  1 +
 4 files changed, 38 insertions(+)
 create mode 100644 t/helper/test-find-pack.c

diff --git a/Makefile b/Makefile
index fb541dedc9..14ee0c45d4 100644
--- a/Makefile
+++ b/Makefile
@@ -800,6 +800,7 @@ TEST_BUILTINS_OBJS += test-dump-untracked-cache.o
 TEST_BUILTINS_OBJS += test-env-helper.o
 TEST_BUILTINS_OBJS += test-example-decorate.o
 TEST_BUILTINS_OBJS += test-fast-rebase.o
+TEST_BUILTINS_OBJS += test-find-pack.o
 TEST_BUILTINS_OBJS += test-fsmonitor-client.o
 TEST_BUILTINS_OBJS += test-genrandom.o
 TEST_BUILTINS_OBJS += test-genzeros.o
diff --git a/t/helper/test-find-pack.c b/t/helper/test-find-pack.c
new file mode 100644
index 0000000000..1928fe7329
--- /dev/null
+++ b/t/helper/test-find-pack.c
@@ -0,0 +1,35 @@
+#include "test-tool.h"
+#include "object-name.h"
+#include "object-store.h"
+#include "packfile.h"
+#include "setup.h"
+
+/*
+ * Display the path(s), one per line, of the packfile(s) containing
+ * the given object.
+ */
+
+static const char *find_pack_usage = "\n"
+"  test-tool find-pack <object>";
+
+
+int cmd__find_pack(int argc, const char **argv)
+{
+	struct object_id oid;
+	struct packed_git *p;
+
+	setup_git_directory();
+
+	if (argc != 2)
+		usage(find_pack_usage);
+
+	if (repo_get_oid(the_repository, argv[1], &oid))
+		die("cannot parse %s as an object name", argv[1]);
+
+	for (p = get_all_packs(the_repository); p; p = p->next) {
+		if (find_pack_entry_one(oid.hash, p))
+			printf("%s\n", p->pack_name);
+	}
+
+	return 0;
+}
diff --git a/t/helper/test-tool.c b/t/helper/test-tool.c
index abe8a785eb..41da40c296 100644
--- a/t/helper/test-tool.c
+++ b/t/helper/test-tool.c
@@ -31,6 +31,7 @@ static struct test_cmd cmds[] = {
 	{ "env-helper", cmd__env_helper },
 	{ "example-decorate", cmd__example_decorate },
 	{ "fast-rebase", cmd__fast_rebase },
+	{ "find-pack", cmd__find_pack },
 	{ "fsmonitor-client", cmd__fsmonitor_client },
 	{ "genrandom", cmd__genrandom },
 	{ "genzeros", cmd__genzeros },
diff --git a/t/helper/test-tool.h b/t/helper/test-tool.h
index ea2672436c..411dbf2db4 100644
--- a/t/helper/test-tool.h
+++ b/t/helper/test-tool.h
@@ -25,6 +25,7 @@ int cmd__dump_reftable(int argc, const char **argv);
 int cmd__env_helper(int argc, const char **argv);
 int cmd__example_decorate(int argc, const char **argv);
 int cmd__fast_rebase(int argc, const char **argv);
+int cmd__find_pack(int argc, const char **argv);
 int cmd__fsmonitor_client(int argc, const char **argv);
 int cmd__genrandom(int argc, const char **argv);
 int cmd__genzeros(int argc, const char **argv);
-- 
2.41.0.384.ged66511823