merge: do early copy to deal with issue636
Without copies/renames, merges source names are 1:1 with their
targets. Copies and renames introduce the possibility that there will
be two merges with the same input but different output. By doing the
copy to the destination name before the merge, the actual merge
becomes 1:1 again, and no source is the input to two different merges.
- add a preliminary scan to applyupdates to do copies
- for the merge action, pass the old name (for finding ancestors) and
the new name (for input to the merge) to filemerge
- eliminate the old post-merge copy
- lookup file contents from new name in filemerge
- pass new name to external merge helper
- report merge failure at new name
- add a test
#!/bin/sh
cat <<EOF >> $HGRCPATH
[extensions]
transplant=
EOF
hg init t
cd t
echo r1 > r1
hg ci -Amr1 -d'0 0'
echo r2 > r2
hg ci -Amr2 -d'1 0'
hg up 0
echo b1 > b1
hg ci -Amb1 -d '0 0'
echo b2 > b2
hg ci -Amb2 -d '1 0'
echo b3 > b3
hg ci -Amb3 -d '2 0'
hg log --template '{rev} {parents} {desc}\n'
hg clone . ../rebase
cd ../rebase
hg up -C 1
echo '% rebase b onto r1'
hg transplant -a -b tip
hg log --template '{rev} {parents} {desc}\n'
hg clone ../t ../prune
cd ../prune
hg up -C 1
echo '% rebase b onto r1, skipping b2'
hg transplant -a -b tip -p 3
hg log --template '{rev} {parents} {desc}\n'
echo '% remote transplant'
hg clone -r 1 ../t ../remote
cd ../remote
hg transplant --log -s ../t 2 4
hg log --template '{rev} {parents} {desc}\n'
echo '% skip previous transplants'
hg transplant -s ../t -a -b 4
hg log --template '{rev} {parents} {desc}\n'
echo '% skip local changes transplanted to the source'
echo b4 > b4
hg ci -Amb4 -d '3 0'
hg clone ../t ../pullback
cd ../pullback
hg transplant -s ../remote -a -b tip
echo '% remote transplant with pull'
hg -R ../t serve -p 20062 -d --pid-file=../t.pid
cat ../t.pid >> $DAEMON_PIDS
hg clone -r 0 ../t ../rp
cd ../rp
hg transplant -s http://localhost:20062/ 2 4
hg log --template '{rev} {parents} {desc}\n'
echo '% transplant --continue'
hg init ../tc
cd ../tc
cat <<EOF > foo
foo
bar
baz
EOF
echo toremove > toremove
hg ci -Amfoo -d '0 0'
cat <<EOF > foo
foo2
bar2
baz2
EOF
rm toremove
echo added > added
hg ci -Amfoo2 -d '0 0'
echo bar > bar
hg ci -Ambar -d '0 0'
echo bar2 >> bar
hg ci -mbar2 -d '0 0'
hg up 0
echo foobar > foo
hg ci -mfoobar -d '0 0'
hg transplant 1:3
# transplant -c shouldn't use an old changeset
hg up -C
hg transplant 1
hg transplant --continue
hg transplant 1:3
hg locate