tests/test-hgweb-diffs

hgweb: use patch.diff() to make sensible diffs (issue1223, issue1258)

This gets us git diffs when enabled and doesn't pick erratic file parents.

echo % setting up repo
hg init test
cd test
echo a > a
echo b > b
hg ci -Ama

echo % change permissions for git diffs
chmod 755 a
hg ci -Amb

echo % set up hgweb
hg serve -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log
cat hg.pid >> $DAEMON_PIDS

echo % revision
"$TESTDIR/get-with-headers.py" localhost:$HGPORT '/rev/0'

echo % diff removed file
"$TESTDIR/get-with-headers.py" localhost:$HGPORT '/diff/tip/a'

echo % set up hgweb with git diffs
kill `cat hg.pid`
hg serve --config 'diff.git=1' -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log
cat hg.pid >> $DAEMON_PIDS

echo % revision
"$TESTDIR/get-with-headers.py" localhost:$HGPORT '/rev/0'

echo % diff removed file
"$TESTDIR/get-with-headers.py" localhost:$HGPORT '/diff/tip/a'

echo % errors
cat errors.log