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commit --amend -S: strip existing gpgsig headers

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Any existing commit signature was made against the contents of the old
commit, including its committer date that is about to change, and will
become invalid by amending it.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano
2012-01-05 10:54:14 -08:00
parent e3f55e0707
commit c871a1d17b
4 changed files with 36 additions and 8 deletions
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11
t/t7510-signed-commit.sh
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@ -24,7 +24,8 @@ test_expect_success GPG 'create signed commits' '
echo 4 >file && test_tick && git commit -a -m "fourth unsigned" &&
git tag fourth-unsigned &&
test_tick && git commit --amend -S -m "fourth signed"
test_tick && git commit --amend -S -m "fourth signed" &&
git tag fourth-signed
'
test_expect_success GPG 'show signatures' '
@ -68,4 +69,12 @@ test_expect_success GPG 'detect fudged signature with NUL' '
! grep "Good signature from" actual2
'
test_expect_success GPG 'amending already signed commit' '
git checkout fourth-signed^0 &&
git commit --amend -S --no-edit &&
git show -s --show-signature HEAD >actual &&
grep "Good signature from" actual &&
! grep "BAD signature from" actual
'
test_done