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aac385717a
When a deletion is followed by exactly 3 (or whatever the number of
context lines) unchanged lines, followed by another change, the combined
diff output would hide the first deletion, resulting in a malformed
diff.
This happened because the 3 lines before each change are painted
interesting, but also marked as no_pre_delete to prevent showing deletes
that were previously marked as uninteresting. This behaviour was
introduced in c86fbe53 (diff -c/--cc: do not include uninteresting
deletion before leading context). However, as a side effect, this could
also mark deletes that were already interesting as no_pre_delete. This
would happen only if the delete was exactly 3 lines away from the next
change, since lines farther away would not be touched by the "paint
three lines before the change" code and lines closer would be painted
by the "merge two adjacent hunks" code instead, which does not set the
no_pre_delete flag.
This commit fixes this problem by only setting the no_pre_delete flag
for changes that were previously uninteresting.
Signed-off-by: Matthijs Kooijman <matthijs@stdin.nl>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
141 lines
2.5 KiB
Bash
Executable File
141 lines
2.5 KiB
Bash
Executable File
#!/bin/sh
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test_description='combined diff'
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. ./test-lib.sh
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setup_helper () {
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one=$1 branch=$2 side=$3 &&
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git branch $side $branch &&
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for l in $one two three fyra
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do
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echo $l
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done >file &&
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git add file &&
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test_tick &&
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git commit -m $branch &&
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git checkout $side &&
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for l in $one two three quatro
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do
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echo $l
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done >file &&
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git add file &&
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test_tick &&
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git commit -m $side &&
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test_must_fail git merge $branch &&
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for l in $one three four
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do
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echo $l
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done >file &&
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git add file &&
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test_tick &&
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git commit -m "merge $branch into $side"
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}
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verify_helper () {
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it=$1 &&
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# Ignore lines that were removed only from the other parent
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sed -e '
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1,/^@@@/d
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/^ -/d
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s/^\(.\)./\1/
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' "$it" >"$it.actual.1" &&
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sed -e '
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1,/^@@@/d
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/^- /d
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s/^.\(.\)/\1/
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' "$it" >"$it.actual.2" &&
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git diff "$it^" "$it" -- | sed -e '1,/^@@/d' >"$it.expect.1" &&
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test_cmp "$it.expect.1" "$it.actual.1" &&
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git diff "$it^2" "$it" -- | sed -e '1,/^@@/d' >"$it.expect.2" &&
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test_cmp "$it.expect.2" "$it.actual.2"
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}
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test_expect_success setup '
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>file &&
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git add file &&
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test_tick &&
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git commit -m initial &&
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git branch withone &&
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git branch sansone &&
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git checkout withone &&
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setup_helper one withone sidewithone &&
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git checkout sansone &&
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setup_helper "" sansone sidesansone
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'
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test_expect_success 'check combined output (1)' '
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git show sidewithone -- >sidewithone &&
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verify_helper sidewithone
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'
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test_expect_success 'check combined output (2)' '
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git show sidesansone -- >sidesansone &&
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verify_helper sidesansone
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'
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test_expect_success 'diagnose truncated file' '
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>file &&
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git add file &&
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git commit --amend -C HEAD &&
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git show >out &&
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grep "diff --cc file" out
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'
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# Test for a bug reported at
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# http://thread.gmane.org/gmane.comp.version-control.git/224410
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# where a delete lines were missing from combined diff output when they
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# occurred exactly before the context lines of a later change.
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test_expect_success 'combine diff missing delete bug' '
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git commit -m initial --allow-empty &&
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cat <<-\EOF >test &&
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1
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2
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3
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4
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EOF
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git add test &&
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git commit -a -m side1 &&
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git checkout -B side1 &&
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git checkout HEAD^ &&
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cat <<-\EOF >test &&
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0
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1
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2
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3
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4modified
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EOF
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git add test &&
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git commit -m side2 &&
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git branch -f side2 &&
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test_must_fail git merge --no-commit side1 &&
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cat <<-\EOF >test &&
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1
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2
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3
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4modified
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EOF
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git add test &&
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git commit -a -m merge &&
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git diff-tree -c -p HEAD >actual.tmp &&
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sed -e "1,/^@@@/d" < actual.tmp >actual &&
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tr -d Q <<-\EOF >expected &&
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- 0
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1
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2
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3
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-4
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+4modified
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EOF
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test_cmp expected actual
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'
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test_done
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