t/helper/test-read-midx.c: add --checksum mode

Subsequent tests will want to check for the existence of a multi-pack bitmap which matches the multi-pack-index stored in the pack directory. The multi-pack bitmap includes the hex checksum of the MIDX it corresponds to in its filename (for example, '$packdir/multi-pack-index-<checksum>.bitmap'). As a result, some tests want a way to learn what '<checksum>' is. This helper addresses that need by printing the checksum of the repository's multi-pack-index. Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Taylor Blau committed Aug 31, 2021 at 16:52 UTC b1b82d1c3006ff9e25873d4ff01f976a13b526bb
2 files changed +19 -1
t/helper/test-read-midx.c
+15 -1
@@ -60,12 +60,26 @@ static int read_midx_file(const char *object_dir, int show_objects)
60 return 0;
61 }
62
63 +static int read_midx_checksum(const char *object_dir)
64 +{
65 + struct multi_pack_index *m;
66 +
67 + setup_git_directory();
68 + m = load_multi_pack_index(object_dir, 1);
69 + if (!m)
70 + return 1;
71 + printf("%s\n", hash_to_hex(get_midx_checksum(m)));
72 + return 0;
73 +}
74 +
75 int cmd__read_midx(int argc, const char **argv)
76 {
77 if (!(argc == 2 || argc == 3))
66 - usage("read-midx [--show-objects] <object-dir>");
78 + usage("read-midx [--show-objects|--checksum] <object-dir>");
79
80 if (!strcmp(argv[1], "--show-objects"))
81 return read_midx_file(argv[2], 1);
82 + else if (!strcmp(argv[1], "--checksum"))
83 + return read_midx_checksum(argv[2]);
84 return read_midx_file(argv[1], 0);
85 }
t/lib-bitmap.sh
+4
@@ -260,3 +260,7 @@ have_delta () {
260 echo $1 | git cat-file --batch-check="%(deltabase)" >actual &&
261 test_cmp expect actual
262 }
263 +
264 +midx_checksum () {
265 + test-tool read-midx --checksum "$1"
266 +}