#!/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

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. This is needed
# because the system and stratum morphologies will have references
# to the temporary build refs and that will affect the artifact
# cache keys. If we fix the UUIDs, the artifact cache keys will
# always be the same.
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 from the workspace root.
cd "$DATADIR/workspace"
"$SRCDIR/scripts/test-morph" build linux-system
"$SRCDIR/scripts/list-tree" "$DATADIR/cache/artifacts" > "$DATADIR/output1"
rm -rf "$DATADIR/cache"/*

# Build from the branch.
cd "$DATADIR/workspace/branch1"
"$SRCDIR/scripts/test-morph" build linux-system
"$SRCDIR/scripts/list-tree" "$DATADIR/cache/artifacts" > "$DATADIR/output2"
rm -rf "$DATADIR/cache/artifacts"/*

# Build form the branch root repository.
cd "$DATADIR/workspace/branch1/test:morphs-repo"
"$SRCDIR/scripts/test-morph" build linux-system
"$SRCDIR/scripts/list-tree" "$DATADIR/cache/artifacts" > "$DATADIR/output3"
rm -rf "$DATADIR/cache/artifacts"/*

# Build from the linux directory.
cd "$DATADIR/workspace/branch1/test:kernel-repo"
"$SRCDIR/scripts/test-morph" build linux-system
"$SRCDIR/scripts/list-tree" "$DATADIR/cache/artifacts" > "$DATADIR/output4"
rm -rf "$DATADIR/cache/artifacts"/*

# Verify that we're always building the same and that we're building
# the right things after all.
cat "$DATADIR/output1"

# Print diffs of the build results, all of which should be empty.
diff "$DATADIR/output1" "$DATADIR/output2"
diff "$DATADIR/output2" "$DATADIR/output3"
diff "$DATADIR/output3" "$DATADIR/output4"