~launchpad-pqm/launchpad/devel

#!/bin/bash

#

# Copyright 2009-2010 Canonical Ltd.  This software is licensed under the

# GNU Affero General Public License version 3 (see the file LICENSE).

#

# Determine the changed files in Bazaar piplines, looms and plain branches.

bzr() {

    # PYTHONPATH may point to the ./lib directory in the launchpad tree. This

    # directory includes a bzrlib. When this script calls bzr, we want it to

    # use the system bzrlib, not the one in the launchpad tree.

    PYTHONPATH='' `which bzr` "$@"

}

bzr diff > /dev/null

diff_status=$?

if [ $diff_status -eq 0 ] ; then

    # No uncommitted changes in the tree.

    bzr status | grep "^Current thread:" > /dev/null

    if [ $? -eq 0 ] ; then

        # This is a loom, lint changes relative to the lower thread.

        rev_option="-r thread:"

    elif [ "$(bzr pipes | sed -n -e "/^\\*/q;p" | wc -l)" -gt 0 ]; then

        # This is a pipeline with at least one pipe before the

        # current, lint changes relative to the previous pipe

        rev_option="-r ancestor::prev"

    else

        # Lint changes relative to the parent.

        rev=`bzr info | sed \

            '/parent branch:/!d; s/ *parent branch: /ancestor:/'`

        rev_option="-r $rev"

    fi

elif [ $diff_status -eq 1 ] ; then

    # Uncommitted changes in the tree, return those files.

    rev_option=""

else

    # bzr diff failed

    exit 1

fi

# Extract filename from status line.  Strip the @ that mark symlinks.

files=`bzr st --short $rev_option |

    sed -e '/^.[MN]/!d; s/.* //' -e 's/@$//'`

echo $files