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#!/usr/bin/env python
#
# Copyright (C) 2012 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
Prints to stdout the package names that have overlay changes between
current_overlays.txt and previous_overlays.txt.
Usage: diff_package_overlays.py <current_packages.txt> <current_overlays.txt> <previous_overlays.txt>
current_packages.txt contains all package names separated by space in the current build.
This script modfies current_packages.txt if necessary: if there is a package in
previous_overlays.txt but absent from current_packages.txt, we copy that line
from previous_overlays.txt over to current_packages.txt. Usually that means we
just don't care that package in the current build (for example we are switching
from a full build to a partial build with mm/mmm), and we should carry on the
previous overlay config so current_overlays.txt always reflects the current
status of the entire tree.
Format of current_overlays.txt and previous_overlays.txt:
<package_name> <resource_overlay> [resource_overlay ...]
<package_name> <resource_overlay> [resource_overlay ...]
...
"""
import sys
def main(argv):
if len(argv) != 4:
print >> sys.stderr, __doc__
sys.exit(1)
f = open(argv[1])
all_packages = set(f.read().split())
f.close()
def load_overlay_config(filename):
f = open(filename)
result = {}
for line in f:
line = line.strip()
if not line or line.startswith("#"):
continue
words = line.split()
result[words[0]] = " ".join(words[1:])
f.close()
return result
current_overlays = load_overlay_config(argv[2])
previous_overlays = load_overlay_config(argv[3])
result = []
carryon = []
for p in current_overlays:
if p not in previous_overlays:
result.append(p)
elif current_overlays[p] != previous_overlays[p]:
result.append(p)
for p in previous_overlays:
if p not in current_overlays:
if p in all_packages:
# overlay changed
result.append(p)
else:
# we don't build p in the current build.
carryon.append(p)
# Add carryon to the current overlay config file.
if carryon:
f = open(argv[2], "a")
for p in carryon:
f.write(p + " " + previous_overlays[p] + "\n")
f.close()
# Print out the package names that have overlay change.
for r in result:
print r
if __name__ == "__main__":
main(sys.argv)
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