[PATCH v3 2/3] diff --submodule=diff: do not fail on ever-initialied deleted submodules
If you have ever initialized a submodule, open_submodule will open it. If you then delete the submodule's worktree directory (but don't remove it from .gitmodules), git diff --submodule=diff would error out as it attempted to chdir into the now-deleted working tree directory.
Instead, we chdir into the submodule's git directory and run the diff from there.
Signed-off-by: David Turner <dturner@twosigma.com>
---
submodule.c | 10 ++
t/t4060-diff-submodule-option-diff-format.sh | 158 +++++++++++++++++++++++++--
2 files changed, 161 insertions(+), 7 deletions(-)
Show changes to 2 files +161 −7
submodule.c, t/t4060-diff-submodule-option-diff-format.sh
diff --git a/submodule.c b/submodule.c
index 0b1d9c1dde..d13d103975 100644
--- a/submodule.c
+++ b/submodule.c
@@ -710,6 +710,16 @@ void show_submodule_inline_diff(struct diff_options *o, const char *path,
strvec_push(&cp.args, oid_to_hex(new_oid));
prepare_submodule_repo_env(&cp.env_array);
+
+ if (!is_directory(path)) {
+ // fall back to absorbed git dir, if any
+ if (!sub)
+ goto done;
+ cp.dir = sub->gitdir;
+ strvec_push(&cp.env_array, GIT_DIR_ENVIRONMENT "=.");
+ strvec_push(&cp.env_array, GIT_WORK_TREE_ENVIRONMENT "=.");
+ }
+
if (start_command(&cp))
diff_emit_submodule_error(o, "(diff failed)\n");
diff --git a/t/t4060-diff-submodule-option-diff-format.sh b/t/t4060-diff-submodule-option-diff-format.sh
index 69b9946931..d86e38abd8 100755
--- a/t/t4060-diff-submodule-option-diff-format.sh
+++ b/t/t4060-diff-submodule-option-diff-format.sh
@@ -703,10 +703,26 @@ test_expect_success 'path filter' '
diff_cmp expected actual
'
-commit_file sm2
+cat >.gitmodules <<-EOF
+[submodule "sm2"]
+ path = sm2
+ url = bogus_url
+EOF
+git add .gitmodules
+commit_file sm2 .gitmodules
+
test_expect_success 'given commit' '
git diff-index -p --submodule=diff HEAD^ >actual &&
cat >expected <<-EOF &&
+ diff --git a/.gitmodules b/.gitmodules
+ new file mode 100644
+ index 1234567..89abcde
+ --- /dev/null
+ +++ b/.gitmodules
+ @@ -0,0 +1,3 @@
+ +[submodule "sm2"]
+ +path = sm2
+ +url = bogus_url
Submodule sm1 $head7...0000000 (submodule deleted)
Submodule sm2 0000000...$head9 (new submodule)
diff --git a/sm2/foo8 b/sm2/foo8
@@ -728,15 +744,21 @@ test_expect_success 'given commit' '
'
test_expect_success 'setup .git file for sm2' '
- (cd sm2 &&
- REAL="$(pwd)/../.real" &&
- mv .git "$REAL" &&
- echo "gitdir: $REAL" >.git)
+ git submodule absorbgitdirs sm2
'
test_expect_success 'diff --submodule=diff with .git file' '
git diff --submodule=diff HEAD^ >actual &&
cat >expected <<-EOF &&
+ diff --git a/.gitmodules b/.gitmodules
+ new file mode 100644
+ index 1234567..89abcde
+ --- /dev/null
+ +++ b/.gitmodules
+ @@ -0,0 +1,3 @@
+ +[submodule "sm2"]
+ +path = sm2
+ +url = bogus_url
Submodule sm1 $head7...0000000 (submodule deleted)
Submodule sm2 0000000...$head9 (new submodule)
diff --git a/sm2/foo8 b/sm2/foo8
@@ -757,9 +779,67 @@ test_expect_success 'diff --submodule=diff with .git file' '
diff_cmp expected actual
'
+mv sm2 sm2-bak
+
+test_expect_success 'deleted submodule with .git file' '
+ git diff-index -p --submodule=diff HEAD >actual &&
+ cat >expected <<-EOF &&
+ Submodule sm1 $head7...0000000 (submodule deleted)
+ Submodule sm2 $head9...0000000 (submodule deleted)
+ diff --git a/sm2/foo8 b/sm2/foo8
+ deleted file mode 100644
+ index 1234567..89abcde
+ --- a/sm2/foo8
+ +++ /dev/null
+ @@ -1 +0,0 @@
+ -foo8
+ diff --git a/sm2/foo9 b/sm2/foo9
+ deleted file mode 100644
+ index 1234567..89abcde
+ --- a/sm2/foo9
+ +++ /dev/null
+ @@ -1 +0,0 @@
+ -foo9
+ EOF
+ diff_cmp expected actual
+'
+
+echo submodule-to-blob>sm2
+
+test_expect_success 'typechanged(submodule->blob) submodule with .git file' '
+ git diff-index -p --submodule=diff HEAD >actual &&
+ cat >expected <<-EOF &&
+ Submodule sm1 $head7...0000000 (submodule deleted)
+ Submodule sm2 $head9...0000000 (submodule deleted)
+ diff --git a/sm2/foo8 b/sm2/foo8
+ deleted file mode 100644
+ index 1234567..89abcde
+ --- a/sm2/foo8
+ +++ /dev/null
+ @@ -1 +0,0 @@
+ -foo8
+ diff --git a/sm2/foo9 b/sm2/foo9
+ deleted file mode 100644
+ index 1234567..89abcde
+ --- a/sm2/foo9
+ +++ /dev/null
+ @@ -1 +0,0 @@
+ -foo9
+ diff --git a/sm2 b/sm2
+ new file mode 100644
+ index 1234567..89abcde
+ --- /dev/null
+ +++ b/sm2
+ @@ -0,0 +1 @@
+ +submodule-to-blob
+ EOF
+ diff_cmp expected actual
+'
+
+rm sm2
+mv sm2-bak sm2
+
test_expect_success 'setup nested submodule' '
- git submodule add -f ./sm2 &&
- git commit -a -m "add sm2" &&
git -C sm2 submodule add ../sm2 nested &&
git -C sm2 commit -a -m "nested sub" &&
head10=$(git -C sm2 rev-parse --short --verify HEAD)
@@ -790,6 +870,7 @@ test_expect_success 'diff --submodule=diff with moved nested submodule HEAD' '
test_expect_success 'diff --submodule=diff recurses into nested submodules' '
cat >expected <<-EOF &&
+ Submodule sm1 $head7...0000000 (submodule deleted)
Submodule sm2 contains modified content
Submodule sm2 $head9..$head10:
diff --git a/sm2/.gitmodules b/sm2/.gitmodules
@@ -829,4 +910,67 @@ test_expect_success 'diff --submodule=diff recurses into nested submodules' '
diff_cmp expected actual
'
+(cd sm2; commit_file nested)
+commit_file sm2
+head12=$(cd sm2; git rev-parse --short --verify HEAD)
+
+mv sm2 sm2-bak
+
+test_expect_success 'diff --submodule=diff recurses into deleted nested submodules' '
+ cat >expected <<-EOF &&
+ Submodule sm1 $head7...0000000 (submodule deleted)
+ Submodule sm2 $head12...0000000 (submodule deleted)
+ diff --git a/sm2/.gitmodules b/sm2/.gitmodules
+ deleted file mode 100644
+ index 3a816b8..0000000
+ --- a/sm2/.gitmodules
+ +++ /dev/null
+ @@ -1,3 +0,0 @@
+ -[submodule "nested"]
+ - path = nested
+ - url = ../sm2
+ diff --git a/sm2/foo8 b/sm2/foo8
+ deleted file mode 100644
+ index db9916b..0000000
+ --- a/sm2/foo8
+ +++ /dev/null
+ @@ -1 +0,0 @@
+ -foo8
+ diff --git a/sm2/foo9 b/sm2/foo9
+ deleted file mode 100644
+ index 9c3b4f6..0000000
+ --- a/sm2/foo9
+ +++ /dev/null
+ @@ -1 +0,0 @@
+ -foo9
+ Submodule nested $head11...0000000 (submodule deleted)
+ diff --git a/sm2/nested/file b/sm2/nested/file
+ deleted file mode 100644
+ index ca281f5..0000000
+ --- a/sm2/nested/file
+ +++ /dev/null
+ @@ -1 +0,0 @@
+ -nested content
+ diff --git a/sm2/nested/foo8 b/sm2/nested/foo8
+ deleted file mode 100644
+ index db9916b..0000000
+ --- a/sm2/nested/foo8
+ +++ /dev/null
+ @@ -1 +0,0 @@
+ -foo8
+ diff --git a/sm2/nested/foo9 b/sm2/nested/foo9
+ deleted file mode 100644
+ index 9c3b4f6..0000000
+ --- a/sm2/nested/foo9
+ +++ /dev/null
+ @@ -1 +0,0 @@
+ -foo9
+ EOF
+ git diff --submodule=diff >actual 2>err &&
+ test_must_be_empty err &&
+ diff_cmp expected actual
+'
+
+mv sm2-bak sm2
+
test_done
--
2.11.GIT
David Turner