git-commit-vandalism/t/t4200-rerere.sh

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#!/bin/sh
#
# Copyright (c) 2006 Johannes E. Schindelin
#
test_description='git rerere
! [fifth] version1
! [first] first
! [fourth] version1
! [master] initial
! [second] prefer first over second
! [third] version2
------
+ [third] version2
+ [fifth] version1
+ [fourth] version1
+ + + [third^] third
- [second] prefer first over second
+ + [first] first
+ [second^] second
++++++ [master] initial
'
. ./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 &&
test_tick &&
git commit -q -a -m initial &&
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 checkout -b first &&
test_tick &&
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 &&
test_tick &&
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
'
test_expect_success 'activate rerere, old style (conflicting merge)' '
git reset --hard &&
mkdir .git/rr-cache &&
test_might_fail git config --unset rerere.enabled &&
test_must_fail git merge first &&
sha1=$(perl -pe "s/ .*//" .git/MERGE_RR) &&
rr=.git/rr-cache/$sha1 &&
grep "^=======\$" $rr/preimage &&
! test -f $rr/postimage &&
! test -f $rr/thisimage
'
test_expect_success 'rerere.enabled works, too' '
rm -rf .git/rr-cache &&
git config rerere.enabled true &&
git reset --hard &&
test_must_fail git merge first &&
sha1=$(perl -pe "s/ .*//" .git/MERGE_RR) &&
rr=.git/rr-cache/$sha1 &&
grep ^=======$ $rr/preimage
'
test_expect_success 'set up rr-cache' '
rm -rf .git/rr-cache &&
git config rerere.enabled true &&
git reset --hard &&
test_must_fail git merge first &&
sha1=$(perl -pe "s/ .*//" .git/MERGE_RR) &&
rr=.git/rr-cache/$sha1
'
test_expect_success 'rr-cache looks sane' '
# no postimage or thisimage yet
! test -f $rr/postimage &&
! test -f $rr/thisimage &&
# preimage has right number of lines
cnt=$(sed -ne "/^<<<<<<</,/^>>>>>>>/p" $rr/preimage | wc -l) &&
echo $cnt &&
test $cnt = 13
'
test_expect_success 'rerere diff' '
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_cmp expect out
'
test_expect_success 'rerere status' '
echo a1 >expect &&
git rerere status >out &&
test_cmp expect out
'
test_expect_success 'first postimage wins' '
git show first:a1 | sed "s/To die: t/To die! T/" >expect &&
git commit -q -a -m "prefer first over second" &&
test -f $rr/postimage &&
oldmtimepost=$(test-tool chmtime --get -60 $rr/postimage) &&
git checkout -b third master &&
git show second^:a1 | sed "s/To die: t/To die! T/" >a1 &&
git commit -q -a -m third &&
test_must_fail git merge first &&
# rerere kicked in
! grep "^=======\$" a1 &&
test_cmp expect a1
'
test_expect_success 'rerere updates postimage timestamp' '
newmtimepost=$(test-tool chmtime --get $rr/postimage) &&
test $oldmtimepost -lt $newmtimepost
'
test_expect_success 'rerere clear' '
mv $rr/postimage .git/post-saved &&
echo "$sha1 a1" | perl -pe "y/\012/\000/" >.git/MERGE_RR &&
git rerere clear &&
! test -d $rr
'
test_expect_success 'leftover directory' '
git reset --hard &&
mkdir -p $rr &&
test_must_fail git merge first &&
test -f $rr/preimage
'
test_expect_success 'missing preimage' '
git reset --hard &&
mkdir -p $rr &&
cp .git/post-saved $rr/postimage &&
test_must_fail git merge first &&
test -f $rr/preimage
'
test_expect_success 'set up for garbage collection tests' '
mkdir -p $rr &&
echo Hello >$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-tool chmtime =$just_over_60_days_ago $rr/preimage &&
test-tool chmtime =$almost_60_days_ago $rr/postimage &&
test-tool chmtime =$almost_15_days_ago $rr2/preimage
'
test_expect_success 'gc preserves young or recently used records' '
git rerere gc &&
test -f $rr/preimage &&
test -f $rr2/preimage
'
test_expect_success 'old records rest in peace' '
test-tool chmtime =$just_over_60_days_ago $rr/postimage &&
test-tool chmtime =$just_over_15_days_ago $rr2/preimage &&
git rerere gc &&
! test -f $rr/preimage &&
! test -f $rr2/preimage
'
rerere_gc_custom_expiry_test () {
five_days="$1" right_now="$2"
test_expect_success "rerere gc with custom expiry ($five_days, $right_now)" '
rm -fr .git/rr-cache &&
rr=.git/rr-cache/$ZERO_OID &&
mkdir -p "$rr" &&
>"$rr/preimage" &&
>"$rr/postimage" &&
two_days_ago=$((-2*86400)) &&
test-tool chmtime =$two_days_ago "$rr/preimage" &&
test-tool chmtime =$two_days_ago "$rr/postimage" &&
find .git/rr-cache -type f | sort >original &&
git -c "gc.rerereresolved=$five_days" \
-c "gc.rerereunresolved=$five_days" rerere gc &&
find .git/rr-cache -type f | sort >actual &&
test_cmp original actual &&
git -c "gc.rerereresolved=$five_days" \
-c "gc.rerereunresolved=$right_now" rerere gc &&
find .git/rr-cache -type f | sort >actual &&
test_cmp original actual &&
git -c "gc.rerereresolved=$right_now" \
-c "gc.rerereunresolved=$right_now" rerere gc &&
find .git/rr-cache -type f | sort >actual &&
>expect &&
test_cmp expect actual
'
}
rerere_gc_custom_expiry_test 5 0
rerere_gc_custom_expiry_test 5.days.ago now
test_expect_success 'setup: file2 added differently in two branches' '
git reset --hard &&
git checkout -b fourth &&
echo Hallo >file2 &&
git add file2 &&
test_tick &&
git commit -m version1 &&
git checkout third &&
echo Bello >file2 &&
git add file2 &&
test_tick &&
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' '
echo Cello >expected &&
git reset --hard HEAD~2 &&
git checkout -b fifth &&
echo Hallo >file3 &&
git add file3 &&
test_tick &&
git commit -m version1 &&
git checkout third &&
echo Bello >file3 &&
git add file3 &&
test_tick &&
git commit -m version2 &&
git tag version2 &&
test_must_fail git merge fifth &&
test_cmp expected file3 &&
test_must_fail git update-index --refresh
'
test_expect_success 'rerere.autoupdate' '
git config rerere.autoupdate true &&
git reset --hard &&
git checkout version2 &&
test_must_fail git merge fifth &&
git update-index --refresh
'
test_expect_success 'merge --rerere-autoupdate' '
test_might_fail git config --unset rerere.autoupdate &&
git reset --hard &&
git checkout version2 &&
test_must_fail git merge --rerere-autoupdate fifth &&
git update-index --refresh
'
test_expect_success 'merge --no-rerere-autoupdate' '
headblob=$(git rev-parse version2:file3) &&
mergeblob=$(git rev-parse fifth:file3) &&
cat >expected <<-EOF &&
100644 $headblob 2 file3
100644 $mergeblob 3 file3
EOF
git config rerere.autoupdate true &&
git reset --hard &&
git checkout version2 &&
test_must_fail git merge --no-rerere-autoupdate fifth &&
git ls-files -u >actual &&
test_cmp expected actual
'
test_expect_success 'set up an unresolved merge' '
headblob=$(git rev-parse version2:file3) &&
mergeblob=$(git rev-parse fifth:file3) &&
cat >expected.unresolved <<-EOF &&
100644 $headblob 2 file3
100644 $mergeblob 3 file3
EOF
test_might_fail git config --unset rerere.autoupdate &&
git reset --hard &&
git checkout version2 &&
fifth=$(git rev-parse fifth) &&
echo "$fifth branch 'fifth' of ." |
git fmt-merge-msg >msg &&
ancestor=$(git merge-base version2 fifth) &&
test_must_fail git merge-recursive "$ancestor" -- HEAD fifth &&
git ls-files --stage >failedmerge &&
cp file3 file3.conflict &&
git ls-files -u >actual &&
test_cmp expected.unresolved actual
'
test_expect_success 'explicit rerere' '
test_might_fail git config --unset rerere.autoupdate &&
git rm -fr --cached . &&
git update-index --index-info <failedmerge &&
cp file3.conflict file3 &&
test_must_fail git update-index --refresh -q &&
git rerere &&
git ls-files -u >actual &&
test_cmp expected.unresolved actual
'
test_expect_success 'explicit rerere with autoupdate' '
git config rerere.autoupdate true &&
git rm -fr --cached . &&
git update-index --index-info <failedmerge &&
cp file3.conflict file3 &&
test_must_fail git update-index --refresh -q &&
git rerere &&
git update-index --refresh
'
test_expect_success 'explicit rerere --rerere-autoupdate overrides' '
git config rerere.autoupdate false &&
git rm -fr --cached . &&
git update-index --index-info <failedmerge &&
cp file3.conflict file3 &&
git rerere &&
git ls-files -u >actual1 &&
git rm -fr --cached . &&
git update-index --index-info <failedmerge &&
cp file3.conflict file3 &&
git rerere --rerere-autoupdate &&
git update-index --refresh &&
git rm -fr --cached . &&
git update-index --index-info <failedmerge &&
cp file3.conflict file3 &&
git rerere --rerere-autoupdate --no-rerere-autoupdate &&
git ls-files -u >actual2 &&
git rm -fr --cached . &&
git update-index --index-info <failedmerge &&
cp file3.conflict file3 &&
git rerere --rerere-autoupdate --no-rerere-autoupdate --rerere-autoupdate &&
git update-index --refresh &&
test_cmp expected.unresolved actual1 &&
test_cmp expected.unresolved actual2
'
test_expect_success 'rerere --no-no-rerere-autoupdate' '
git rm -fr --cached . &&
git update-index --index-info <failedmerge &&
cp file3.conflict file3 &&
test_must_fail git rerere --no-no-rerere-autoupdate 2>err &&
test_i18ngrep [Uu]sage err &&
test_must_fail git update-index --refresh
'
test_expect_success 'rerere -h' '
test_must_fail git rerere -h >help &&
test_i18ngrep [Uu]sage help
'
concat_insert () {
last=$1
shift
cat early && printf "%s\n" "$@" && cat late "$last"
}
count_pre_post () {
find .git/rr-cache/ -type f -name "preimage*" >actual &&
test_line_count = "$1" actual &&
find .git/rr-cache/ -type f -name "postimage*" >actual &&
test_line_count = "$2" actual
}
merge_conflict_resolve () {
git reset --hard &&
test_must_fail git merge six.1 &&
# Resolution is to replace 7 with 6.1 and 6.2 (i.e. take both)
concat_insert short 6.1 6.2 >file1 &&
concat_insert long 6.1 6.2 >file2
}
test_expect_success 'multiple identical conflicts' '
rm -fr .git/rr-cache &&
mkdir .git/rr-cache &&
git reset --hard &&
test_seq 1 6 >early &&
>late &&
test_seq 11 15 >short &&
test_seq 111 120 >long &&
concat_insert short >file1 &&
concat_insert long >file2 &&
git add file1 file2 &&
git commit -m base &&
git tag base &&
git checkout -b six.1 &&
concat_insert short 6.1 >file1 &&
concat_insert long 6.1 >file2 &&
git add file1 file2 &&
git commit -m 6.1 &&
git checkout -b six.2 HEAD^ &&
concat_insert short 6.2 >file1 &&
concat_insert long 6.2 >file2 &&
git add file1 file2 &&
git commit -m 6.2 &&
# At this point, six.1 and six.2
# - derive from common ancestor that has two files
# 1...6 7 11..15 (file1) and 1...6 7 111..120 (file2)
# - six.1 replaces these 7s with 6.1
# - six.2 replaces these 7s with 6.2
merge_conflict_resolve &&
# Check that rerere knows that file1 and file2 have conflicts
printf "%s\n" file1 file2 >expect &&
git ls-files -u | sed -e "s/^.* //" | sort -u >actual &&
test_cmp expect actual &&
git rerere status | sort >actual &&
test_cmp expect actual &&
git rerere remaining >actual &&
test_cmp expect actual &&
count_pre_post 2 0 &&
# Pretend that the conflicts were made quite some time ago
test-tool chmtime -172800 $(find .git/rr-cache/ -type f) &&
# Unresolved entries have not expired yet
git -c gc.rerereresolved=5 -c gc.rerereunresolved=5 rerere gc &&
count_pre_post 2 0 &&
# Unresolved entries have expired
git -c gc.rerereresolved=5 -c gc.rerereunresolved=1 rerere gc &&
count_pre_post 0 0 &&
# Recreate the conflicted state
merge_conflict_resolve &&
count_pre_post 2 0 &&
# Clear it
git rerere clear &&
count_pre_post 0 0 &&
# Recreate the conflicted state
merge_conflict_resolve &&
count_pre_post 2 0 &&
# We resolved file1 and file2
git rerere &&
>expect &&
git rerere remaining >actual &&
test_cmp expect actual &&
# We must have recorded both of them
count_pre_post 2 2 &&
# Now we should be able to resolve them both
git reset --hard &&
test_must_fail git merge six.1 &&
git rerere &&
>expect &&
git rerere remaining >actual &&
test_cmp expect actual &&
concat_insert short 6.1 6.2 >file1.expect &&
concat_insert long 6.1 6.2 >file2.expect &&
test_cmp file1.expect file1 &&
test_cmp file2.expect file2 &&
# Forget resolution for file2
git rerere forget file2 &&
echo file2 >expect &&
git rerere status >actual &&
test_cmp expect actual &&
count_pre_post 2 1 &&
# file2 already has correct resolution, so record it again
git rerere &&
# Pretend that the resolutions are old again
test-tool chmtime -172800 $(find .git/rr-cache/ -type f) &&
# Resolved entries have not expired yet
git -c gc.rerereresolved=5 -c gc.rerereunresolved=5 rerere gc &&
count_pre_post 2 2 &&
# Resolved entries have expired
git -c gc.rerereresolved=1 -c gc.rerereunresolved=5 rerere gc &&
count_pre_post 0 0
'
rerere: fix crash with files rerere can't handle Currently when a user does a conflict resolution and ends it (in any way that calls 'git rerere' again) with a file 'rerere' can't handle, subsequent rerere operations that are interested in that path, such as 'rerere clear' or 'rerere forget <path>' will fail, or even worse in the case of 'rerere clear' segfault. Such states include nested conflicts, or a conflict marker that doesn't have any match. This is because 'git rerere' calculates a conflict file and writes it to the MERGE_RR file. When the user then changes the file in any way rerere can't handle, and then calls 'git rerere' on it again to record the conflict resolution, the handle_file function fails, and removes the 'preimage' file in the rr-cache in the process, while leaving the ID in the MERGE_RR file. Now when 'rerere clear' is run, it reads the ID from the MERGE_RR file, however the 'fit_variant' function for the ID is never called as the 'preimage' file does not exist anymore. This means 'collection->status' in 'has_rerere_resolution' is NULL, and the command will crash. To fix this, remove the rerere ID from the MERGE_RR file in the case when we can't handle it, just after the 'preimage' file was removed and remove the corresponding variant from .git/rr-cache/. Removing it unconditionally is fine here, because if the user would have resolved the conflict and ran rerere, the entry would no longer be in the MERGE_RR file, so we wouldn't have this problem in the first place, while if the conflict was not resolved. Currently there is nothing left in this folder, as the 'preimage' was already deleted by the 'handle_file' function, so 'remove_variant' is a no-op. Still call the function, to make sure we clean everything up, in case we add some other files corresponding to a variant in the future. Note that other variants that have the same conflict ID will not be touched. Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-05 19:20:32 +02:00
test_expect_success 'rerere with unexpected conflict markers does not crash' '
git reset --hard &&
git checkout -b branch-1 master &&
echo "bar" >test &&
git add test &&
git commit -q -m two &&
git reset --hard &&
git checkout -b branch-2 master &&
echo "foo" >test &&
git add test &&
git commit -q -a -m one &&
test_must_fail git merge branch-1 &&
echo "<<<<<<< a" >test &&
git rerere &&
git rerere clear
'
test_done