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git/t/t4200-rerere.sh
Olivier Marin 99d698f1e7 builtin-rerere: more carefully find conflict markers
When a conflicting file contains a line that begin with "=======", rerere
failed to parse conflict markers. This result to a wrong preimage file and
an unexpected error for the user.  The boundary between ours and theirs
not just begin with 7 equals, but is followed by either a SP or a LF.

This patch enforces parsing rules so that markers match in the right order,
and when ambiguous, the command does not autoresolve the conflicted file.

Especially because we are introducing rerere.autoupdate configuration
(which is off by default for safety) that automatically stages the
resolution made by rerere, it is necessary to make sure that we do not
autoresolve when there is any ambiguity.

Signed-off-by: Olivier Marin <dkr@freesurf.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-10 00:17:46 -07:00

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#!/bin/sh
#
# Copyright (c) 2006 Johannes E. Schindelin
#
test_description='git rerere
'
. ./test-lib.sh
cat > a1 << EOF
Some title
==========
Whether 'tis nobler in the mind to suffer
The slings and arrows of outrageous fortune,
Or to take arms against a sea of troubles,
And by opposing end them? To die: to sleep;
No more; and by a sleep to say we end
The heart-ache and the thousand natural shocks
That flesh is heir to, 'tis a consummation
Devoutly to be wish'd.
EOF
git add a1
git commit -q -a -m initial
git checkout -b first
cat >> a1 << EOF
Some title
==========
To die, to sleep;
To sleep: perchance to dream: ay, there's the rub;
For in that sleep of death what dreams may come
When we have shuffled off this mortal coil,
Must give us pause: there's the respect
That makes calamity of so long life;
EOF
git commit -q -a -m first
git checkout -b second master
git show first:a1 |
sed -e 's/To die, t/To die! T/' -e 's/Some title/Some Title/' > a1
echo "* END *" >>a1
git commit -q -a -m second
test_expect_success 'nothing recorded without rerere' '
(rm -rf .git/rr-cache; git config rerere.enabled false) &&
! git merge first &&
! test -d .git/rr-cache
'
# activate rerere, old style
test_expect_success 'conflicting merge' '
git reset --hard &&
mkdir .git/rr-cache &&
git config --unset rerere.enabled &&
! git merge first
'
sha1=$(sed -e 's/ .*//' .git/rr-cache/MERGE_RR)
rr=.git/rr-cache/$sha1
test_expect_success 'recorded preimage' "grep ^=======$ $rr/preimage"
test_expect_success 'rerere.enabled works, too' '
rm -rf .git/rr-cache &&
git config rerere.enabled true &&
git reset --hard &&
! git merge first &&
grep ^=======$ $rr/preimage
'
test_expect_success 'no postimage or thisimage yet' \
"test ! -f $rr/postimage -a ! -f $rr/thisimage"
test_expect_success 'preimage has right number of lines' '
cnt=$(sed -ne "/^<<<<<<</,/^>>>>>>>/p" $rr/preimage | wc -l) &&
test $cnt = 13
'
git show first:a1 > a1
cat > expect << EOF
--- a/a1
+++ b/a1
@@ -1,4 +1,4 @@
-Some Title
+Some title
==========
Whether 'tis nobler in the mind to suffer
The slings and arrows of outrageous fortune,
@@ -8,21 +8,11 @@
The heart-ache and the thousand natural shocks
That flesh is heir to, 'tis a consummation
Devoutly to be wish'd.
-<<<<<<<
-Some Title
-==========
-To die! To sleep;
-=======
Some title
==========
To die, to sleep;
->>>>>>>
To sleep: perchance to dream: ay, there's the rub;
For in that sleep of death what dreams may come
When we have shuffled off this mortal coil,
Must give us pause: there's the respect
That makes calamity of so long life;
-<<<<<<<
-=======
-* END *
->>>>>>>
EOF
git rerere diff > out
test_expect_success 'rerere diff' 'test_cmp expect out'
cat > expect << EOF
a1
EOF
git rerere status > out
test_expect_success 'rerere status' 'test_cmp expect out'
test_expect_success 'commit succeeds' \
"git commit -q -a -m 'prefer first over second'"
test_expect_success 'recorded postimage' "test -f $rr/postimage"
test_expect_success 'another conflicting merge' '
git checkout -b third master &&
git show second^:a1 | sed "s/To die: t/To die! T/" > a1 &&
git commit -q -a -m third &&
! git pull . first
'
git show first:a1 | sed 's/To die: t/To die! T/' > expect
test_expect_success 'rerere kicked in' "! grep ^=======$ a1"
test_expect_success 'rerere prefers first change' 'test_cmp a1 expect'
rm $rr/postimage
echo "$sha1 a1" | perl -pe 'y/\012/\000/' > .git/rr-cache/MERGE_RR
test_expect_success 'rerere clear' 'git rerere clear'
test_expect_success 'clear removed the directory' "test ! -d $rr"
mkdir $rr
echo Hello > $rr/preimage
echo World > $rr/postimage
sha2=4000000000000000000000000000000000000000
rr2=.git/rr-cache/$sha2
mkdir $rr2
echo Hello > $rr2/preimage
almost_15_days_ago=$((60-15*86400))
just_over_15_days_ago=$((-1-15*86400))
almost_60_days_ago=$((60-60*86400))
just_over_60_days_ago=$((-1-60*86400))
test-chmtime =$almost_60_days_ago $rr/preimage
test-chmtime =$almost_15_days_ago $rr2/preimage
test_expect_success 'garbage collection (part1)' 'git rerere gc'
test_expect_success 'young records still live' \
"test -f $rr/preimage && test -f $rr2/preimage"
test-chmtime =$just_over_60_days_ago $rr/preimage
test-chmtime =$just_over_15_days_ago $rr2/preimage
test_expect_success 'garbage collection (part2)' 'git rerere gc'
test_expect_success 'old records rest in peace' \
"test ! -f $rr/preimage && test ! -f $rr2/preimage"
test_expect_success 'file2 added differently in two branches' '
git reset --hard &&
git checkout -b fourth &&
echo Hallo > file2 &&
git add file2 &&
git commit -m version1 &&
git checkout third &&
echo Bello > file2 &&
git add file2 &&
git commit -m version2 &&
! git merge fourth &&
sha1=$(sed -e "s/ .*//" .git/rr-cache/MERGE_RR) &&
rr=.git/rr-cache/$sha1 &&
echo Cello > file2 &&
git add file2 &&
git commit -m resolution
'
test_expect_success 'resolution was recorded properly' '
git reset --hard HEAD~2 &&
git checkout -b fifth &&
echo Hallo > file3 &&
git add file3 &&
git commit -m version1 &&
git checkout third &&
echo Bello > file3 &&
git add file3 &&
git commit -m version2 &&
git tag version2 &&
test_must_fail git merge fifth &&
test Cello = "$(cat file3)" &&
test 0 != $(git ls-files -u | wc -l)
'
test_expect_success 'rerere.autoupdate' '
git config rerere.autoupdate true
git reset --hard &&
git checkout version2 &&
test_must_fail git merge fifth &&
test 0 = $(git ls-files -u | wc -l)
'
test_done