convert: make contents of "extra" dict available from sources, for sinks.
This breaks hash preservation for hg->hg conversion, as each converted
change gets a convert_revision item added to its extra dict. Ugh.
#!/bin/sh
echo "[extensions]" >> $HGRCPATH
echo "hgext.convert=" >> $HGRCPATH
hg init orig
cd orig
echo foo > foo
echo bar > bar
hg ci -qAm 'add foo bar' -d '0 0'
echo >> foo
hg ci -m 'change foo' -d '1 0'
hg up -qC 0
hg copy --after --force foo bar
hg copy foo baz
hg ci -m 'make bar and baz copies of foo' -d '2 0'
hg merge
hg ci -m 'merge local copy' -d '3 0'
hg up -C 1
hg merge 2
hg ci -m 'merge remote copy' -d '4 0'
cd ..
hg convert --datesort orig new 2>&1 | grep -v 'subversion python bindings could not be loaded'
cd new
hg out ../orig
true