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#!/usr/bin/python
# Copyright (c) 2011 Google Inc. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Utility functions to perform Xcode-style build steps.
These functions are executed via gyp-mac-tool when using the Makefile generator.
"""
import os
import fcntl
import plistlib
import shutil
import string
import subprocess
import sys
def main(args):
executor = MacTool()
executor.Dispatch(args)
class MacTool(object):
"""This class performs all the Mac tooling steps. The methods can either be
executed directly, or dispatched from an argument list."""
def Dispatch(self, args):
"""Dispatches a string command to a method."""
if len(args) < 1:
raise Exception("Not enough arguments")
method = "Exec%s" % self._CommandifyName(args[0])
getattr(self, method)(*args[1:])
def _CommandifyName(self, name_string):
"""Transforms a tool name like copy-info-plist to CopyInfoPlist"""
return name_string.title().replace('-', '')
def ExecFlock(self, lockfile, *cmd_list):
"""Emulates the most basic behavior of Linux's flock(1)."""
# Rely on exception handling to report errors.
fd = os.open(lockfile, os.O_RDONLY|os.O_NOCTTY|os.O_CREAT, 0o666)
fcntl.flock(fd, fcntl.LOCK_EX)
return subprocess.call(cmd_list)
def ExecCopyInfoPlist(self, source, dest):
"""Copies the |source| Info.plist to the destination directory |dest|."""
# Read the source Info.plist into memory.
fd = open(source, 'r')
lines = fd.read()
fd.close()
# Go through all the environment variables and replace them as variables in
# the file.
for key in os.environ:
if key.startswith('_'):
continue
evar = '${%s}' % key
lines = string.replace(lines, evar, os.environ[key])
# Write out the file with variables replaced.
fd = open(dest, 'w')
fd.write(lines)
fd.close()
# Now write out PkgInfo file now that the Info.plist file has been
# "compiled".
self._WritePkgInfo(dest)
def _WritePkgInfo(self, info_plist):
"""This writes the PkgInfo file from the data stored in Info.plist."""
plist = plistlib.readPlist(info_plist)
if not plist:
return
# The format of PkgInfo is eight characters, representing the bundle type
# and bundle signature, each four characters. If either is missing, four
# '?' characters are used instead.
package_type = plist['CFBundlePackageType']
if len(package_type) != 4:
package_type = '?' * 4
signature_code = plist['CFBundleSignature']
if len(signature_code) != 4:
signature_code = '?' * 4
dest = os.path.join(os.path.dirname(info_plist), 'PkgInfo')
fp = open(dest, 'w')
fp.write('%s%s' % (package_type, signature_code))
fp.close()
def ExecPackageFramework(self, framework, version):
"""Takes a path to Something.framework and the Current version of that and
sets up all the symlinks."""
# Find the name of the binary based on the part before the ".framework".
binary = os.path.basename(framework).split('.')[0]
CURRENT = 'Current'
RESOURCES = 'Resources'
VERSIONS = 'Versions'
if not os.path.exists(os.path.join(framework, VERSIONS, version, binary)):
# Binary-less frameworks don't seem to contain symlinks (see e.g.
# chromium's out/Debug/org.chromium.Chromium.manifest/ bundle).
return
# Move into the framework directory to set the symlinks correctly.
pwd = os.getcwd()
os.chdir(framework)
# Set up the Current version.
self._Relink(version, os.path.join(VERSIONS, CURRENT))
# Set up the root symlinks.
self._Relink(os.path.join(VERSIONS, CURRENT, binary), binary)
self._Relink(os.path.join(VERSIONS, CURRENT, RESOURCES), RESOURCES)
# Back to where we were before!
os.chdir(pwd)
def _Relink(self, dest, link):
"""Creates a symlink to |dest| named |link|. If |link| already exists,
it is overwritten."""
if os.path.lexists(link):
os.remove(link)
os.symlink(dest, link)
def ExecCopyBundleResource(self, source, dest):
"""Copies a resource file to the bundle/Resources directory, performing any
necessary compilation on each resource."""
extension = os.path.splitext(source)[1].lower()
if os.path.isdir(source):
# Copy tree.
if os.path.exists(dest):
shutil.rmtree(dest)
shutil.copytree(source, dest)
elif extension == '.xib':
self._CopyXIBFile(source, dest)
elif extension == '.strings':
self._CopyStringsFile(source, dest)
# TODO: Given that files with arbitrary extensions can be copied to the
# bundle, we will want to get rid of this whitelist eventually.
elif extension in [
'.icns', '.manifest', '.pak', '.pdf', '.png', '.sb', '.sh',
'.ttf', '.sdef']:
shutil.copyfile(source, dest)
else:
raise NotImplementedError(
"Don't know how to copy bundle resources of type %s while copying "
"%s to %s)" % (extension, source, dest))
def _CopyXIBFile(self, source, dest):
"""Compiles a XIB file with ibtool into a binary plist in the bundle."""
args = ['/Developer/usr/bin/ibtool', '--errors', '--warnings',
'--notices', '--output-format', 'human-readable-text', '--compile',
dest, source]
subprocess.call(args)
def _CopyStringsFile(self, source, dest):
"""Copies a .strings file using iconv to reconvert the input into UTF-16."""
input_code = self._DetectInputEncoding(source) or "UTF-8"
fp = open(dest, 'w')
args = ['/usr/bin/iconv', '--from-code', input_code, '--to-code',
'UTF-16', source]
subprocess.call(args, stdout=fp)
fp.close()
def _DetectInputEncoding(self, file_name):
"""Reads the first few bytes from file_name and tries to guess the text
encoding. Returns None as a guess if it can't detect it."""
fp = open(file_name, 'rb')
try:
header = fp.read(3)
except e:
fp.close()
return None
fp.close()
if header.startswith("\xFE\xFF"):
return "UTF-16BE"
elif header.startswith("\xFF\xFE"):
return "UTF-16LE"
elif header.startswith("\xEF\xBB\xBF"):
return "UTF-8"
else:
return None
if __name__ == '__main__':
sys.exit(main(sys.argv[1:]))
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