tests/test-convert-darcs

use 'x is None' instead of 'x == None'

The built-in None object is a singleton and it is therefore safe to
compare memory addresses with is. It is also faster, how much depends
on the object being compared. For a simple type like str I get:

            | s = "foo" | s = None
  ----------+-----------+----------
  s == None | 0.25 usec | 0.21 usec
  s is None | 0.17 usec | 0.17 usec

#!/bin/sh

"$TESTDIR/hghave" darcs || exit 80
if darcs --version 2>&1 | grep '^2\.' > /dev/null; then
    # FIXME: darcs 2 will fail with
    ### Abort: timeout after 180 seconds.
    echo 'skipped: test currently disabled for darcs 2'
    exit 80
fi

echo "[extensions]" >> $HGRCPATH
echo "convert=" >> $HGRCPATH
echo 'hgext.graphlog =' >> $HGRCPATH

DARCS_EMAIL='[e-mail]'; export DARCS_EMAIL
HOME=do_not_use_HOME_darcs; export HOME

# skip if we can't import elementtree
mkdir dummy
mkdir dummy/_darcs
if hg convert dummy 2>&1 | grep ElementTree > /dev/null; then
    echo 'skipped: missing feature: elementtree module'
    exit 80
fi

echo % initialize darcs repo
mkdir darcs-repo
cd darcs-repo
darcs init
echo a > a
darcs record -a -l -m p0
cd ..

echo % branch and update
darcs get darcs-repo darcs-clone >/dev/null
cd darcs-clone
echo c >> a
echo c > c
darcs record -a -l -m p1.1
cd ..

echo % update source
cd darcs-repo
echo b >> a
echo b > b
darcs record -a -l -m p1.2

echo % merge branch
darcs pull -a ../darcs-clone
echo e > a
darcs record -a -l -m p2
cd ..

glog()
{
    hg glog --template '{rev} "{desc|firstline}" files: {files}\n' "$@"
}

hg convert darcs-repo darcs-repo-hg 2>&1 | grep -v hGetLine | grep -v '^$'
# The converter does not currently handle patch conflicts very well.
# When they occur, it reverts *all* changes and moves forward,
# letting the conflict resolving patch fix collisions.
# Unfortunately, non-conflicting changes, like the addition of the
# "c" file in p1.1 patch are reverted too.
# Just to say that manifest not listing "c" here is a bug.
glog -R darcs-repo-hg
hg up -q -R darcs-repo-hg
hg -R darcs-repo-hg manifest --debug