Enable demandimport only in scripts, not in importable modules (issue605)
This way other applications can choose if and when they want this feature,
because it might be problematic if those applications rely on ImportError.
#!/bin/sh
echo "[extensions]" >> $HGRCPATH
echo "extdiff=" >> $HGRCPATH
hg init a
cd a
echo a > a
echo b > b
hg add
# should diff cloned directories
hg extdiff -o -r $opt
echo "[extdiff]" >> $HGRCPATH
echo "cmd.falabala=echo" >> $HGRCPATH
echo "opts.falabala=diffing" >> $HGRCPATH
hg falabala
hg help falabala
hg ci -d '0 0' -mtest1
echo b >> a
hg ci -d '1 0' -mtest2
# should diff cloned files directly
hg falabala -r 0:1
# test diff during merge
hg update 0
echo c >> c
hg add c
hg ci -m "new branch" -d '1 0'
hg update -C 1
hg merge tip
# should diff cloned file against wc file
hg falabala > out || echo "diff-like tools yield a non-zero exit code"
# cleanup the output since the wc is a tmp directory
sed 's:\(.* \).*\(\/test-extdiff\):\1[tmp]\2:' out