I tried out 'git format-patch --base' with a set of commits that
modifies more than one file. It turns out that the way this command is
implemented it actually uses the unstable version of patch-id instead of
the stable version that's documented. When I tried to modify the
existing test to use 'git patch-id --stable' vs. 'git patch-id
--unstable' I found that it didn't matter, the test still passed.
Let's expand on the test here so it is a little more complicated and
then use that to show that the patch-id generation is actually unstable
vs. stable. Update the documentation as well.
Cc: Xiaolong Ye <xiaolong.ye@xxxxxxxxx>
Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxx>
---
Documentation/git-format-patch.txt | 2 +-
t/t4014-format-patch.sh | 36 +++++++++++++++++++++++++-----
2 files changed, 32 insertions(+), 6 deletions(-)
diff --git a/Documentation/git-format-patch.txt b/Documentation/git-format-patch.txt
index 1af85d404f51..e8cc792e7f5d 100644
--- a/Documentation/git-format-patch.txt
+++ b/Documentation/git-format-patch.txt
@@ -583,7 +583,7 @@ of 'base commit' in topological order before the patches can be applied.
The 'base commit' is shown as "base-commit: " followed by the 40-hex of
the commit object name. A 'prerequisite patch' is shown as
"prerequisite-patch-id: " followed by the 40-hex 'patch id', which can
-be obtained by passing the patch through the `git patch-id --stable`
+be obtained by passing the patch through the `git patch-id --unstable`
command.
Imagine that on top of the public commit P, you applied well-known
diff --git a/t/t4014-format-patch.sh b/t/t4014-format-patch.sh
index b6e2fdbc4410..e82c6c7d9177 100755
--- a/t/t4014-format-patch.sh
+++ b/t/t4014-format-patch.sh
@@ -36,8 +36,27 @@ test_expect_success setup '
git checkout master &&
git diff-tree -p C2 | git apply --index &&
test_tick &&
- git commit -m "Master accepts moral equivalent of #2"
+ git commit -m "Master accepts moral equivalent of #2" &&
+ git checkout side &&
+ git checkout -b patchid &&
+ for i in 5 6 1 2 3 A 4 B C 7 8 9 10 D E F; do echo "$i"; done >file2 &&
+ for i in 1 2 3 A 4 B C 7 8 9 10 D E F 5 6; do echo "$i"; done >file3 &&
+ for i in 8 9 10; do echo "$i"; done >file &&
+ git add file file2 file3 &&
+ test_tick &&
+ git commit -m "patchid 1" &&
+ for i in 4 A B 7 8 9 10; do echo "$i"; done >file2 &&
+ for i in 8 9 10 5 6; do echo "$i"; done >file3 &&
+ git add file2 file3 &&
+ test_tick &&
+ git commit -m "patchid 2" &&
+ for i in 10 5 6; do echo "$i"; done >file &&
+ git add file &&
+ test_tick &&
+ git commit -m "patchid 3" &&
+
+ git checkout master
'
test_expect_success "format-patch --ignore-if-in-upstream" '
@@ -1559,16 +1578,23 @@ test_expect_success 'format-patch -o overrides format.outputDirectory' '
'
test_expect_success 'format-patch --base' '
- git checkout side &&
+ git checkout patchid &&
git format-patch --stdout --base=HEAD~3 -1 | tail -n 7 >actual1 &&
git format-patch --stdout --base=HEAD~3 HEAD~.. | tail -n 7 >actual2 &&
echo >expected &&
echo "base-commit: $(git rev-parse HEAD~3)" >>expected &&
- echo "prerequisite-patch-id: $(git show --patch HEAD~2 | git patch-id --stable | awk "{print \$1}")" >>expected &&
- echo "prerequisite-patch-id: $(git show --patch HEAD~1 | git patch-id --stable | awk "{print \$1}")" >>expected &&
+ echo "prerequisite-patch-id: $(git show --patch HEAD~2 | git patch-id --unstable | awk "{print \$1}")" >>expected &&
+ echo "prerequisite-patch-id: $(git show --patch HEAD~1 | git patch-id --unstable | awk "{print \$1}")" >>expected &&
signature >> expected &&
test_cmp expected actual1 &&
- test_cmp expected actual2
+ test_cmp expected actual2 &&
+ echo >fail &&
+ echo "base-commit: $(git rev-parse HEAD~3)" >>fail &&
+ echo "prerequisite-patch-id: $(git show --patch HEAD~2 | git patch-id --stable | awk "{print \$1}")" >>fail &&
+ echo "prerequisite-patch-id: $(git show --patch HEAD~1 | git patch-id --stable | awk "{print \$1}")" >>fail &&
+ signature >> fail &&
+ ! test_cmp fail actual1 &&
+ ! test_cmp fail actual2
'
test_expect_success 'format-patch --base errors out when base commit is in revision list' '
--
Sent by a computer through tubes
