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+#!/bin/sh
+#
+# Copyright (c) 2006 Johannes E. Schindelin
+#
+
+test_description='git rerere
+'
+
+. ./test-lib.sh
+
+test_expect_success 'setup' "
+ 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) &&
+ test_must_fail 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 &&
+ test_must_fail git merge first
+'
+
+sha1=$(perl -pe 's/ .*//' .git/MERGE_RR)
+rr=.git/rr-cache/$sha1
+test_expect_success 'recorded preimage' "grep ^=======$ $rr/preimage"
+
+test_expect_success 'rerere.enabled works, too' '
+ rm -rf .git/rr-cache &&
+ git config rerere.enabled true &&
+ git reset --hard &&
+ test_must_fail git merge first &&
+ grep ^=======$ $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 $rr/postimage"
+
+test_expect_success 'another conflicting merge' '
+ git checkout -b third master &&
+ git show second^:a1 | sed "s/To die: t/To die! T/" > a1 &&
+ git commit -q -a -m third &&
+ test_must_fail git pull . first
+'
+
+git show first:a1 | sed 's/To die: t/To die! T/' > expect
+test_expect_success 'rerere kicked in' "! grep ^=======$ a1"
+
+test_expect_success 'rerere prefers first change' 'test_cmp a1 expect'
+
+rm $rr/postimage
+echo "$sha1 a1" | perl -pe 'y/\012/\000/' > .git/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 $rr2/preimage"
+
+test_expect_success 'file2 added differently in two branches' '
+ git reset --hard &&
+ git checkout -b fourth &&
+ echo Hallo > file2 &&
+ git add file2 &&
+ git commit -m version1 &&
+ git checkout third &&
+ echo Bello > file2 &&
+ git add file2 &&
+ git commit -m version2 &&
+ test_must_fail git merge fourth &&
+ echo Cello > file2 &&
+ git add file2 &&
+ git commit -m resolution
+'
+
+test_expect_success 'resolution was recorded properly' '
+ git reset --hard HEAD~2 &&
+ git checkout -b fifth &&
+ echo Hallo > file3 &&
+ git add file3 &&
+ git commit -m version1 &&
+ git checkout third &&
+ echo Bello > file3 &&
+ git add file3 &&
+ git commit -m version2 &&
+ git tag version2 &&
+ test_must_fail git merge fifth &&
+ test Cello = "$(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_expect_success 'merge --rerere-autoupdate' '
+ git config --unset rerere.autoupdate
+ git reset --hard &&
+ git checkout version2 &&
+ test_must_fail git merge --rerere-autoupdate fifth &&
+ test 0 = $(git ls-files -u | wc -l)
+'
+
+test_expect_success 'merge --no-rerere-autoupdate' '
+ git config rerere.autoupdate true
+ git reset --hard &&
+ git checkout version2 &&
+ test_must_fail git merge --no-rerere-autoupdate fifth &&
+ test 2 = $(git ls-files -u | wc -l)
+'
+
+test_done