tests/test-mq-qfold

prepush: add more precise error messages

Part of the patch is from [e-mail]

- indicate the branch name where there are multiple heads
- give better advice when hitting a possible race, where new heads are added
  between discovery and the call to branchmap(). In that case, asking the user
  to merge isn't helpful, since only remote has the changes.

#!/bin/sh

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

filterdiff()
{
    grep -v diff | \
	sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
	-e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/"
}

echo '% init'
hg init repo
cd repo
echo a > a
hg ci -Am adda
echo a >> a
hg qnew -f p1
echo b >> a
hg qnew -f p2
echo c >> a
hg qnew -f p3
echo '% fold in the middle of the queue'
hg qpop p1
hg qdiff | filterdiff
hg qfold p2
grep git .hg/patches/p1 && echo 'git patch found!'
hg qser
hg qdiff | filterdiff
echo '% fold with local changes'
echo d >> a
hg qfold p3
hg diff -c . | filterdiff
hg revert -a --no-backup

echo '% fold git patch into a regular patch, expect git patch'
echo a >> a
hg qnew -f regular
hg cp a aa
hg qnew --git -f git
hg qpop
hg qfold git
cat .hg/patches/regular
hg qpop
hg qdel regular

echo '% fold regular patch into a git patch, expect git patch'
hg cp a aa
hg qnew --git -f git
echo b >> aa
hg qnew -f regular
hg qpop
hg qfold regular
cat .hg/patches/git

cd ..