#!/bin/bash
# Copyright (C) 2012  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.

# Make sure "morph build" works anywhere in a workspace or system branch
# and produces the same results every time.

set -eu

# Disable test on versions of Python before 2.7.
if ! python --version 2>&1 | grep '^Python 2\.[78]' > /dev/null
then
    name="building-a-system-branch-picks-up-uncommitted-changes"
    cat "$SRCDIR/tests.as-root/$name.stdout"
    exit 0
fi

source "$SRCDIR/scripts/fix-committer-info"

# Initialise the workspace.
cd "$DATADIR/workspace"
"$SRCDIR/scripts/test-morph" init

# Create a new local system branch.
"$SRCDIR/scripts/test-morph" branch test:morphs-repo branch1

# Edit linux.
"$SRCDIR/scripts/test-morph" edit linux-system linux-stratum linux

# Fix the UUIDs being used for the temporary refs.
git config -f "$DATADIR/workspace/branch1/.morph-system-branch/config" \
    branch.uuid 123456789
git config -f "$DATADIR/workspace/branch1/test:morphs-repo/.git/config" \
    morph.uuid 987654321
git config -f "$DATADIR/workspace/branch1/test:kernel-repo/.git/config" \
    morph.uuid AABBCCDDE

# Build the linux system from the system branch.
cd "$DATADIR/workspace"
"$SRCDIR/scripts/test-morph" build linux-system

# Print tree SHA1s of the build ref of morphs and kernel.
echo "Tree of morphs repo build branch after first build:"
cd "$DATADIR/workspace/branch1/test:morphs-repo"
git log -1 --format=%T baserock/builds/123456789/987654321
echo "Tree of kernel repo build branch after first build:"
cd "$DATADIR/workspace/branch1/test:kernel-repo"
git log -1 --format=%T baserock/builds/123456789/AABBCCDDE

echo

# Make an uncommitted change to the linux morphology.
cd "$DATADIR/workspace/branch1/test:kernel-repo"
sed -i -e 's@touch@touch foo@g' linux.morph

# Build the linux system again without comitting.
cd "$DATADIR/workspace"
"$SRCDIR/scripts/test-morph" build linux-system

# Print tree SHA1s of the build ref of morphs and kernel again.
# This time the tree SHA1 of morphs-repo should be the same
# but that of the kernel repo should be different because we
# made a change.
echo "Tree of morphs repo build branch after second build:"
cd "$DATADIR/workspace/branch1/test:morphs-repo"
git log -1 --format=%T baserock/builds/123456789/987654321
echo "Tree of kernel repo build branch after second build:"
cd "$DATADIR/workspace/branch1/test:kernel-repo"
git log -1 --format=%T baserock/builds/123456789/AABBCCDDE