graphlog: split the actual DAG grapher out into a separate method
This allows extensions like pbranch to use asciigraph() to graph dependencies
for patch branches, but could be used for basically any DAG.
#!/bin/sh
# b51a8138292a introduced a regression where we would mention in the
# changelog executable files added by the second parent of a merge.
# Test that that doesn't happen anymore
"$TESTDIR/hghave" execbit || exit 80
hg init repo
cd repo
echo foo > foo
hg ci -qAm 'add foo' -d '0 0'
echo bar > bar
chmod +x bar
hg ci -qAm 'add bar' -d '0 0'
echo '% manifest of p2:'
hg manifest
echo
hg up -qC 0
echo >> foo
hg ci -m 'change foo' -d '0 0'
echo '% manifest of p1:'
hg manifest
hg merge
hg ci -m 'merge' -d '0 0'
echo '% this should not mention bar:'
hg tip -v
hg debugindex .hg/store/data/bar.i