run-tests: redefine --with-hg so it takes the 'hg' script to run. - in parseargs(), check that --with-hg value is valid - add handy --local option for "--with-hg=../hg" - ensure that we always set PATH and PYTHONPATH (not just when doing a temporary install) - override any existing PYTHONPATH, so test success does not depend on whatever happens to be in the caller's environment - give tests a little more control by exporting $PYTHON to the environment; needed by test-convert and test-mergetool when they run hg with a stripped-down $PATH Also, add a big comment explaining all the corner cases to test for the next person who tries to modify this script.

#!/bin/sh

for i in aaa zzz; do
    hg init t
    cd t

    echo "-- With $i"

    touch file
    hg add file
    hg ci -m "Add"

    hg cp file $i
    hg ci -m "a -> $i"

    hg cp $i other-file
    echo "different" >> $i
    hg ci -m "$i -> other-file"

    hg cp other-file somename

    echo "Status":
    hg st -C
    echo
    echo "Diff:"
    hg diff -g
    echo

    cd ..
    rm -rf t
done