[RFC PATCH v2 1/4] Prevent diff machinery from examining assume-unchanged entries on worktree
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
diff-lib.c | 5 +++--
t/t4039-diff-assume-unchanged.sh | 31 +++++++++++++++++++++++++++++++
2 files changed, 34 insertions(+), 2 deletions(-)
create mode 100755 t/t4039-diff-assume-unchanged.sh
diff --git a/diff-lib.c b/diff-lib.c
index b7813af..f5787f6 100644
--- a/diff-lib.c
+++ b/diff-lib.c
@@ -159,7 +159,7 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
continue;
}
- if (ce_uptodate(ce))
+ if (ce_uptodate(ce) || (ce->ce_flags & CE_VALID))
continue;
changed = check_removed(ce, &st);
@@ -337,6 +337,8 @@ static void do_oneway_diff(struct unpack_trees_options *o,
struct rev_info *revs = o->unpack_data;
int match_missing, cached;
+ /* if the entry is not checked out, don't examine work tree */
+ cached = o->index_only || (idx && (idx->ce_flags & CE_VALID));
/*
* Backward compatibility wart - "diff-index -m" does
* not mean "do not ignore merges", but "match_missing".
@@ -344,7 +346,6 @@ static void do_oneway_diff(struct unpack_trees_options *o,
* But with the revision flag parsing, that's found in
* "!revs->ignore_merges".
*/
- cached = o->index_only;
match_missing = !revs->ignore_merges;
if (cached && idx && ce_stage(idx)) {
diff --git a/t/t4039-diff-assume-unchanged.sh b/t/t4039-diff-assume-unchanged.sh
new file mode 100755
index 0000000..d0e46a7
--- /dev/null
+++ b/t/t4039-diff-assume-unchanged.sh
@@ -0,0 +1,31 @@
+#!/bin/sh
+
+test_description='diff with assume-unchanged entries'
+
+. ./test-lib.sh
+
+# external diff has been tested in t4020-diff-external.sh
+
+test_expect_success 'setup' '
+ echo zero > zero &&
+ git add zero &&
+ git commit -m zero &&
+ echo one > one &&
+ echo two > two &&
+ git add one two &&
+ git commit -m onetwo &&
+ git update-index --assume-unchanged one &&
+ echo borked >> one &&
+ test "$(git ls-files -v one)" = "h one"
+'
+
+test_expect_success 'diff-index does not examine assume-unchanged entries' '
+ git diff-index HEAD^ -- one | grep -q 5626abf0f72e58d7a153368ba57db4c673c0e171
+'
+
+# TODO ced_uptodate()
+test_expect_success 'diff-files does not examine assume-unchanged entries' '
+ /usr/bin/git diff-files -- one
+'
+
+test_done
--
1.6.3.GIT
Nguyễn Thái Ngọc Duy <pclouds@gmail.com>