tests/test-mq

convert: fix mercurial_sink.putcommit

Changeset 4ebc8693ce72 added some code to putcommit to avoid creating a
revision that touches no files, but this can break regular conversions
from some repositories:

- conceptually, since we're converting a repo, we should try to make
  the new hg repo as similar as possible to the original repo - we
  should create a new changeset, even if the original revision didn't
  touch any files (maybe the commit message had some important bit);

- even if a "regular" revision that doesn't touch any file may seem
  weird (and maybe even broken), it's completely legitimate for a merge
  revision to not touch any file, and, if we just skip it, the
  converted repo will end up with wrong history and possibly an extra
  head.

  As an example, say the crew and main hg repos are sync'ed.  Somebody
  sends an important patch to the mailing list.  Matt quickly applies
  and pushes it.  But at the same time somebody also applies it to crew
  and pushes it.  Suppose the commit message ended up being a bit
  different (say, there was a typo and somebody didn't fix it) or that
  the date ended up being different (because of different patch-applying
  scripts): the changeset hashes will be different, but the manifests
  will be the same.

  Since both changesets were pushed to public repos, it's hard to recall
  them.  If both are merged, the manifest from the resulting merge
  revision will have the exact same contents as its parents - i.e. the
  merge revision really doesn't touch any file at all.

To keep the file filtering stuff "working", the generic code was changed
to skip empty revisions if we're filtering the repo, fixing a bug in the
process (we want parents[0] instead of tip).

#!/bin/sh

echo "[extensions]" >> $HGRCPATH
echo "mq=" >> $HGRCPATH

echo % help
hg help mq

hg init a
cd a
echo a > a
hg ci -Ama

hg clone . ../k

mkdir b
echo z > b/z
hg ci -Ama

echo % qinit

hg qinit

cd ..
hg init b

echo % -R qinit

hg -R b qinit

hg init c

echo % qinit -c

hg --cwd c qinit -c
hg -R c/.hg/patches st

echo % qnew implies add

hg -R c qnew test.patch
hg -R c/.hg/patches st

echo '% qinit; qinit -c'
hg init d
cd d
hg qinit
hg qinit -c
# qinit -c should create both files if they don't exist
echo '  .hgignore:'
cat .hg/patches/.hgignore
echo '  series:'
cat .hg/patches/series
hg qinit -c 2>&1 | sed -e 's/repository.*already/repository already/'
cd ..

echo '% qinit; <stuff>; qinit -c'
hg init e
cd e
hg qnew A
echo foo > foo
hg add foo
hg qrefresh
hg qnew B
echo >> foo
hg qrefresh
echo status >> .hg/patches/.hgignore
echo bleh >> .hg/patches/.hgignore
hg qinit -c
hg -R .hg/patches status
# qinit -c shouldn't touch these files if they already exist
echo '  .hgignore:'
cat .hg/patches/.hgignore
echo '  series:'
cat .hg/patches/series
cd ..

cd a

echo % qnew -m

hg qnew -m 'foo bar' test.patch
cat .hg/patches/test.patch

echo % qrefresh

echo a >> a
hg qrefresh
sed -e "s/^\(diff -r \)\([a-f0-9]* \)/\1 x/" \
    -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
    -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/" .hg/patches/test.patch

echo % empty qrefresh

hg qrefresh -X a
echo 'revision:'
hg diff -r -2 -r -1
echo 'patch:'
cat .hg/patches/test.patch
echo 'working dir diff:'
hg diff --nodates -q
# restore things
hg qrefresh

echo % qpop

hg qpop

echo % qpush

hg qpush

cd ..

echo % pop/push outside repo

hg -R a qpop
hg -R a qpush

cd a
hg qnew test2.patch

echo % qrefresh in subdir

cd b
echo a > a
hg add a
hg qrefresh

echo % pop/push -a in subdir

hg qpop -a
hg --traceback qpush -a

echo % qseries
hg qseries
hg qpop
hg qseries -vs
hg qpush

echo % qapplied
hg qapplied

echo % qtop
hg qtop

echo % qprev
hg qprev

echo % qnext
hg qnext

echo % pop, qnext, qprev, qapplied
hg qpop
hg qnext
hg qprev
hg qapplied

echo % commit should fail
hg commit

echo % push should fail
hg push ../../k

echo % qunapplied
hg qunapplied

echo % qpush/qpop with index
hg qnew test1b.patch
echo 1b > 1b
hg add 1b
hg qrefresh
hg qpush 2
hg qpop 0
hg qpush test.patch+1
hg qpush test.patch+2
hg qpop test2.patch-1
hg qpop test2.patch-2
hg qpush test1b.patch+1

echo % push should succeed
hg qpop -a
hg push ../../k

echo % qpush/qpop error codes
errorcode()
{
    hg "$@" && echo "  $@ succeeds" || echo "  $@ fails"
}

# we want to start with some patches applied
hg qpush -a
echo "  % pops all patches and succeeds"
errorcode qpop -a
echo "  % does nothing and succeeds"
errorcode qpop -a
echo "  % fails - nothing else to pop"
errorcode qpop
echo "  % pushes a patch and succeeds"
errorcode qpush
echo "  % pops a patch and succeeds"
errorcode qpop
echo "  % pushes up to test1b.patch and succeeds"
errorcode qpush test1b.patch
echo "  % does nothing and succeeds"
errorcode qpush test1b.patch
echo "  % does nothing and succeeds"
errorcode qpop test1b.patch
echo "  % fails - can't push to this patch"
errorcode qpush test.patch
echo "  % fails - can't pop to this patch"
errorcode qpop test2.patch
echo "  % pops up to test.patch and succeeds"
errorcode qpop test.patch
echo "  % pushes all patches and succeeds"
errorcode qpush -a
echo "  % does nothing and succeeds"
errorcode qpush -a
echo "  % fails - nothing else to push"
errorcode qpush
echo "  % does nothing and succeeds"
errorcode qpush test2.patch


echo % strip
cd ../../b
echo x>x
hg ci -Ama
hg strip tip 2>&1 | sed 's/\(saving bundle to \).*/\1/'
hg unbundle .hg/strip-backup/*

echo '% cd b; hg qrefresh'
hg init refresh
cd refresh
echo a > a
hg ci -Ama -d'0 0'
hg qnew -mfoo foo
echo a >> a
hg qrefresh
mkdir b
cd b
echo f > f
hg add f
hg qrefresh
sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
    -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/" ../.hg/patches/foo
echo % hg qrefresh .
hg qrefresh .
sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
    -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/" ../.hg/patches/foo
hg status

echo % qpush failure
cd ..
hg qrefresh
hg qnew -mbar bar
echo foo > foo
echo bar > bar
hg add foo bar
hg qrefresh
hg qpop -a
echo bar > foo
hg qpush -a
hg st

echo % mq tags
hg log --template '{rev} {tags}\n' -r qparent:qtip

cat >>$HGRCPATH <<EOF
[diff]
git = True
EOF
cd ..
hg init git
cd git
hg qinit

hg qnew -m'new file' new
echo foo > new
chmod +x new
hg add new
hg qrefresh
sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
    -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/" .hg/patches/new

hg qnew -m'copy file' copy
hg cp new copy
hg qrefresh
sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
    -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/" .hg/patches/copy

hg qpop
hg qpush
hg qdiff
cat >>$HGRCPATH <<EOF
[diff]
git = False
EOF
hg qdiff --git

cd ..
hg init slow
cd slow
hg qinit
echo foo > foo
hg add foo
hg ci -m 'add foo'
hg qnew bar
echo bar > bar
hg add bar
hg mv foo baz
hg qrefresh --git
hg up -C 0
echo >> foo
hg ci -m 'change foo'
hg up -C 1
hg qrefresh --git 2>&1 | grep -v 'saving bundle'
cat .hg/patches/bar
hg log -vC --template '{rev} {file_copies%filecopy}\n' -r .
hg qrefresh --git
cat .hg/patches/bar
hg log -vC --template '{rev} {file_copies%filecopy}\n' -r .
hg qrefresh
grep 'diff --git' .hg/patches/bar

echo
hg up -C 1
echo >> foo
hg ci -m 'change foo again'
hg up -C 2
hg mv bar quux
hg mv baz bleh
hg qrefresh --git 2>&1 | grep -v 'saving bundle'
cat .hg/patches/bar
hg log -vC --template '{rev} {file_copies%filecopy}\n' -r .
hg mv quux fred
hg mv bleh barney
hg qrefresh --git
cat .hg/patches/bar
hg log -vC --template '{rev} {file_copies%filecopy}\n' -r .

echo % create a git patch
echo a > alexander
hg add alexander
hg qnew -f --git addalexander
grep diff .hg/patches/addalexander

echo % create a git binary patch
cat > writebin.py <<EOF
import sys
path = sys.argv[1]
open(path, 'wb').write('BIN\x00ARY')
EOF
python writebin.py bucephalus

python "$TESTDIR/md5sum.py" bucephalus
hg add bucephalus
hg qnew -f --git addbucephalus
grep diff .hg/patches/addbucephalus

echo % check binary patches can be popped and pushed
hg qpop
test -f bucephalus && echo % bucephalus should not be there
hg qpush
test -f bucephalus || echo % bucephalus should be there
python "$TESTDIR/md5sum.py" bucephalus


echo '% strip again'
cd ..
hg init strip
cd strip
touch foo
hg add foo
hg ci -m 'add foo' -d '0 0'
echo >> foo
hg ci -m 'change foo 1' -d '0 0'
hg up -C 0
echo 1 >> foo
hg ci -m 'change foo 2' -d '0 0'
HGMERGE=true hg merge
hg ci -m merge -d '0 0'
hg log
hg strip 1 2>&1 | sed 's/\(saving bundle to \).*/\1/'
hg log
cd ..

echo '% qclone'
qlog()
{
    echo 'main repo:'
    hg log --template '    rev {rev}: {desc}\n'
    echo 'patch repo:'
    hg -R .hg/patches log --template '    rev {rev}: {desc}\n'
}
hg init qclonesource
cd qclonesource
echo foo > foo
hg add foo
hg ci -m 'add foo'
hg qinit
hg qnew patch1
echo bar >> foo
hg qrefresh -m 'change foo'
cd ..

# repo with unversioned patch dir
hg qclone qclonesource failure

cd qclonesource
hg qinit -c
hg qci -m checkpoint
qlog
cd ..

# repo with patches applied
hg qclone qclonesource qclonedest
cd qclonedest
qlog
cd ..

# repo with patches unapplied
cd qclonesource
hg qpop -a
qlog
cd ..
hg qclone qclonesource qclonedest2
cd qclonedest2
qlog
cd ..