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-rw-r--r--builtin/show-index.c9
-rwxr-xr-xt/t5300-pack-object.sh4
2 files changed, 13 insertions, 0 deletions
diff --git a/builtin/show-index.c b/builtin/show-index.c
index f164c01bbe..b5e337869d 100644
--- a/builtin/show-index.c
+++ b/builtin/show-index.c
@@ -38,6 +38,15 @@ int cmd_show_index(int argc,
repo_set_hash_algo(the_repository, hash_algo);
}
+ /*
+ * Fallback to SHA1 if we are running outside of a repository.
+ *
+ * TODO: Figure out and implement a way to detect the hash algorithm in use by the
+ * the index file passed in and use that instead.
+ */
+ if (!the_hash_algo)
+ repo_set_hash_algo(the_repository, GIT_HASH_SHA1);
+
hashsz = the_hash_algo->rawsz;
if (fread(top_index, 2 * 4, 1, stdin) != 1)
diff --git a/t/t5300-pack-object.sh b/t/t5300-pack-object.sh
index 3b9dae331a..51fed26cc4 100755
--- a/t/t5300-pack-object.sh
+++ b/t/t5300-pack-object.sh
@@ -523,6 +523,10 @@ test_expect_success 'index-pack --strict <pack> works in non-repo' '
test_path_is_file foo.idx
'
+test_expect_success SHA1 'show-index works OK outside a repository' '
+ nongit git show-index <foo.idx
+'
+
test_expect_success !PTHREADS,!FAIL_PREREQS \
'index-pack --threads=N or pack.threads=N warns when no pthreads' '
test_must_fail git index-pack --threads=2 2>err &&