git diff --no-index ... currently reads the index, during setup, when
calling gitmodules_config(). In the usual case this gives us some
performance drawbacks, but it's especially annoying if there is a broken
index file.
Avoid calling the unnecessary gitmodules_config() when the --no-index
option is given. Also add a test to guard against similar breakages in the future.
Signed-off-by: Thomas Gummerer <t.gummerer@xxxxxxxxx>
---
builtin/diff.c | 13 +++++++++++--
t/t4053-diff-no-index.sh | 6 ++++++
2 files changed, 17 insertions(+), 2 deletions(-)
diff --git a/builtin/diff.c b/builtin/diff.c
index adb93a9..47c0833 100644
--- a/builtin/diff.c
+++ b/builtin/diff.c
@@ -257,7 +257,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
int blobs = 0, paths = 0;
const char *path = NULL;
struct blobinfo blob[2];
- int nongit;
+ int nongit, no_index = 0;
int result = 0;
/*
@@ -282,9 +282,18 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
*
* Other cases are errors.
*/
+ for (i = 1; i < argc; i++) {
+ if (!strcmp(argv[i], "--"))
+ break;
+ if (!strcmp(argv[i], "--no-index")) {
+ no_index = 1;
+ break;
+ }
+ }
prefix = setup_git_directory_gently(&nongit);
- gitmodules_config();
+ if (!no_index)
+ gitmodules_config();
git_config(git_diff_ui_config, NULL);
init_revisions(&rev, prefix);
diff --git a/t/t4053-diff-no-index.sh b/t/t4053-diff-no-index.sh
index 979e983..a24ae4d 100755
--- a/t/t4053-diff-no-index.sh
+++ b/t/t4053-diff-no-index.sh
@@ -29,4 +29,10 @@ test_expect_success 'git diff --no-index relative path outside repo' '
)
'
+test_expect_success 'git diff --no-index with broken index' '
+ cd repo &&
+ echo broken >.git/index &&
+ test_expect_code 0 git diff --no-index a ../non/git/a
+'
+
test_done
--
1.8.4.2
--
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