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
cp "$TESTDIR"/printenv.py .
hg init test
cd test
echo foo>foo
hg commit -A -d '0 0' -m 1
hg --config server.uncompressed=True serve -p 20059 -d --pid-file=../hg1.pid
hg serve -p 20060 -d --pid-file=../hg2.pid
# Test server address cannot be reused
hg serve -p 20060 2>&1 | sed -e 's/abort: cannot start server:.*/abort: cannot start server:/'
cd ..
cat hg1.pid hg2.pid >> $DAEMON_PIDS
echo % clone via stream
http_proxy= hg clone --uncompressed http://localhost:20059/ copy 2>&1 | \
sed -e 's/[0-9][0-9.]*/XXX/g' -e 's/[KM]\(B\/sec\)/X\1/'
hg verify -R copy
echo % try to clone via stream, should use pull instead
http_proxy= hg clone --uncompressed http://localhost:20060/ copy2
echo % clone via pull
http_proxy= hg clone http://localhost:20059/ copy-pull
hg verify -R copy-pull
cd test
echo bar > bar
hg commit -A -d '1 0' -m 2
cd ..
echo % pull
cd copy-pull
echo '[hooks]' >> .hg/hgrc
echo 'changegroup = python ../printenv.py changegroup' >> .hg/hgrc
hg pull
cd ..