tests/bzr-definitions

manifest.c: new extension code to lazily parse manifests

This lets us iterate manifests in order, but do a _lot_ less work in
the common case when we only care about a few manifest entries.

Many thanks to Mike Edgar for reviewing this in advance of it going
out to the list, which caught many things I missed.

This version of the patch includes C89 fixes from Sean Farley and
many correctness/efficiency cleanups from Martin von
Zweigbergk. Thanks to both!

# this file holds the definitions that are used in various bzr tests

"$TESTDIR/hghave" bzr || exit 80

TERM=dumb; export TERM
echo '[extensions]' >> $HGRCPATH
echo 'convert = ' >> $HGRCPATH

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

manifest()
{
    echo "% manifest of $2"
    hg -R $1 manifest -v -r $2
}