[PATCH 1/2] format-patch: Inform user that patch-id generation is unstable
- From
Stephen Boyd <sboyd@kernel.org>
- Date
- Apr 26, 2019, 23:51 UTC
- Message-ID
- <20190426235157.106350-1-sboyd@kernel.org>
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@intel.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org> --- 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' '
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