#!/bin/sh
#
# Does a cached stratum get rebuilt if its chunk changes?
# This tests a bug that is currently in morph, where the stratum does
# not get rebuilt in that case. Later on, the test will guard against
# regressions.
#
# Copyright (C) 2011  Codethink Limited
# 
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

set -e

cache="$DATADIR/rebuild-cached-stratum-cache"
log="$DATADIR/rebuild-cached-stratum-morph.log"

# Make a branch in the chunk repo where we can make our own modifications.
(cd "$DATADIR/chunk-repo" &&
 git checkout --quiet farrokh &&
 git checkout --quiet -b rebuild-cached-stratum)

# Make a branch in the morphs repo and modify the stratum to refer to 
# the new chunk branch.
(cd "$DATADIR/morphs-repo" &&
 git checkout --quiet -b rebuild-cached-stratum &&
 sed -i 's/farrokh/rebuild-cached-stratum/' hello-stratum.morph &&
 git commit --quiet -m "rebuild-cached-stratum" -a)

# Build the first time.
./morph --no-default-configs \
    build morphs-repo rebuild-cached-stratum hello-stratum.morph \
    --git-base-url="file://$DATADIR" \
    --cachedir="$cache" --keep-path --no-distcc \
    --log="$log" || cat "$log" 1>&2
echo "first build:"
(cd "$cache" && ls *.chunk.*  *.stratum.* | sed 's/^[^.]*\./ /' | 
 LC_ALL=C sort)

# Change the chunk.
(cd "$DATADIR/chunk-repo" && 
 echo >> hello.c && 
 git commit --quiet -am change)

# Rebuild.
./morph --no-default-configs \
    build morphs-repo rebuild-cached-stratum hello-stratum.morph \
    --git-base-url="file://$DATADIR" \
    --cachedir="$cache" --keep-path --no-distcc \
    --log="$log" || cat "$log" 1>&2
echo "second build:"
(cd "$cache" && ls *.chunk.*  *.stratum.* | sed 's/^[^.]*\./ /' | 
 LC_ALL=C sort)