tests/test-mq-safety

merge: allow smarter tool configuration

Add [merge-tool] hgrc section with:
 <tool>.executable = name or path (<tool>)
 <tool>.args = args with $local/base/other/output ($local $base $other)
 <tool>.priority = priority (default 0)
 <tool>.binary = handles binary (False)
 <tool>.symlink = handles symlinks (False)
 <tool>.checkconflict = check for conflict markers (False)
 <tool>.premerge = try internal simplemerge (True if not binary or symlink)

Four built-in tools: internal:{merge,local,other,fail}

Add [merge-patterns] section of the form:
 <pattern> = <tool>

Priority of settings is:
 HGMERGE
 merge-patterns
 ui:merge
 merge-tools by priority
 hgmerge, if it can be found

Changes:
 unsuccessful merges leave .orig files

#!/bin/sh

echo '[extensions]' >> $HGRCPATH
echo 'hgext.mq =' >> $HGRCPATH

hg init repo
cd repo

echo foo > foo
hg ci -qAm 'add a file'

hg qinit

hg qnew foo
echo foo >> foo
hg qrefresh -m 'append foo'

hg qnew bar
echo bar >> foo
hg qrefresh -m 'append bar'

echo '% try to commit on top of a patch'
echo quux >> foo
hg ci -m 'append quux'

# cheat a bit...
mv .hg/patches .hg/patches2
hg ci -m 'append quux'
mv .hg/patches2 .hg/patches

echo '% qpop/qrefresh on the wrong revision'
hg qpop
hg qpop -n patches 2>&1 | sed -e 's/\(using patch queue:\).*/\1/'
hg qrefresh

hg up -C qtip
echo '% qpop'
hg qpop

echo '% qrefresh'
hg qrefresh

echo '% tip:'
hg tip --template '#rev# #desc#\n'