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#!/usr/bin/env python
# Copyright (c) 2012 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 for Windows builds.
These functions are executed via gyp-win-tool when using the ninja generator.
"""
import os
import re
import shutil
import subprocess
import stat
import string
import sys
BASE_DIR = os.path.dirname(os.path.abspath(__file__))
# A regex matching an argument corresponding to the output filename passed to
# link.exe.
_LINK_EXE_OUT_ARG = re.compile('/OUT:(?P<out>.+)$', re.IGNORECASE)
def main(args):
executor = WinTool()
exit_code = executor.Dispatch(args)
if exit_code is not None:
sys.exit(exit_code)
class WinTool(object):
"""This class performs all the Windows tooling steps. The methods can either
be executed directly, or dispatched from an argument list."""
def _UseSeparateMspdbsrv(self, env, args):
"""Allows to use a unique instance of mspdbsrv.exe per linker instead of a
shared one."""
if len(args) < 1:
raise Exception("Not enough arguments")
if args[0] != 'link.exe':
return
# Use the output filename passed to the linker to generate an endpoint name
# for mspdbsrv.exe.
endpoint_name = None
for arg in args:
m = _LINK_EXE_OUT_ARG.match(arg)
if m:
endpoint_name = re.sub(r'\W+', '',
'%s_%d' % (m.group('out'), os.getpid()))
break
if endpoint_name is None:
return
# Adds the appropriate environment variable. This will be read by link.exe
# to know which instance of mspdbsrv.exe it should connect to (if it's
# not set then the default endpoint is used).
env['_MSPDBSRV_ENDPOINT_'] = endpoint_name
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])
return getattr(self, method)(*args[1:])
def _CommandifyName(self, name_string):
"""Transforms a tool name like recursive-mirror to RecursiveMirror."""
return name_string.title().replace('-', '')
def _GetEnv(self, arch):
"""Gets the saved environment from a file for a given architecture."""
# The environment is saved as an "environment block" (see CreateProcess
# and msvs_emulation for details). We convert to a dict here.
# Drop last 2 NULs, one for list terminator, one for trailing vs. separator.
pairs = open(arch).read()[:-2].split('\0')
kvs = [item.split('=', 1) for item in pairs]
return dict(kvs)
def ExecStamp(self, path):
"""Simple stamp command."""
open(path, 'w').close()
def ExecRecursiveMirror(self, source, dest):
"""Emulation of rm -rf out && cp -af in out."""
if os.path.exists(dest):
if os.path.isdir(dest):
def _on_error(fn, path, excinfo):
# The operation failed, possibly because the file is set to
# read-only. If that's why, make it writable and try the op again.
if not os.access(path, os.W_OK):
os.chmod(path, stat.S_IWRITE)
fn(path)
shutil.rmtree(dest, onerror=_on_error)
else:
if not os.access(dest, os.W_OK):
# Attempt to make the file writable before deleting it.
os.chmod(dest, stat.S_IWRITE)
os.unlink(dest)
if os.path.isdir(source):
shutil.copytree(source, dest)
else:
shutil.copy2(source, dest)
def ExecLinkWrapper(self, arch, use_separate_mspdbsrv, *args):
"""Filter diagnostic output from link that looks like:
' Creating library ui.dll.lib and object ui.dll.exp'
This happens when there are exports from the dll or exe.
"""
env = self._GetEnv(arch)
if use_separate_mspdbsrv == 'True':
self._UseSeparateMspdbsrv(env, args)
link = subprocess.Popen([args[0].replace('/', '\\')] + list(args[1:]),
shell=True,
env=env,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT)
out, _ = link.communicate()
for line in out.splitlines():
if not line.startswith(' Creating library '):
print line
return link.returncode
def ExecLinkWithManifests(self, arch, embed_manifest, out, ldcmd, resname,
mt, rc, intermediate_manifest, *manifests):
"""A wrapper for handling creating a manifest resource and then executing
a link command."""
# The 'normal' way to do manifests is to have link generate a manifest
# based on gathering dependencies from the object files, then merge that
# manifest with other manifests supplied as sources, convert the merged
# manifest to a resource, and then *relink*, including the compiled
# version of the manifest resource. This breaks incremental linking, and
# is generally overly complicated. Instead, we merge all the manifests
# provided (along with one that includes what would normally be in the
# linker-generated one, see msvs_emulation.py), and include that into the
# first and only link. We still tell link to generate a manifest, but we
# only use that to assert that our simpler process did not miss anything.
variables = {
'python': sys.executable,
'arch': arch,
'out': out,
'ldcmd': ldcmd,
'resname': resname,
'mt': mt,
'rc': rc,
'intermediate_manifest': intermediate_manifest,
'manifests': ' '.join(manifests),
}
add_to_ld = ''
if manifests:
subprocess.check_call(
'%(python)s gyp-win-tool manifest-wrapper %(arch)s %(mt)s -nologo '
'-manifest %(manifests)s -out:%(out)s.manifest' % variables)
if embed_manifest == 'True':
subprocess.check_call(
'%(python)s gyp-win-tool manifest-to-rc %(arch)s %(out)s.manifest'
' %(out)s.manifest.rc %(resname)s' % variables)
subprocess.check_call(
'%(python)s gyp-win-tool rc-wrapper %(arch)s %(rc)s '
'%(out)s.manifest.rc' % variables)
add_to_ld = ' %(out)s.manifest.res' % variables
subprocess.check_call(ldcmd + add_to_ld)
# Run mt.exe on the theoretically complete manifest we generated, merging
# it with the one the linker generated to confirm that the linker
# generated one does not add anything. This is strictly unnecessary for
# correctness, it's only to verify that e.g. /MANIFESTDEPENDENCY was not
# used in a #pragma comment.
if manifests:
# Merge the intermediate one with ours to .assert.manifest, then check
# that .assert.manifest is identical to ours.
subprocess.check_call(
'%(python)s gyp-win-tool manifest-wrapper %(arch)s %(mt)s -nologo '
'-manifest %(out)s.manifest %(intermediate_manifest)s '
'-out:%(out)s.assert.manifest' % variables)
assert_manifest = '%(out)s.assert.manifest' % variables
our_manifest = '%(out)s.manifest' % variables
# Load and normalize the manifests. mt.exe sometimes removes whitespace,
# and sometimes doesn't unfortunately.
with open(our_manifest, 'rb') as our_f:
with open(assert_manifest, 'rb') as assert_f:
our_data = our_f.read().translate(None, string.whitespace)
assert_data = assert_f.read().translate(None, string.whitespace)
if our_data != assert_data:
os.unlink(out)
def dump(filename):
sys.stderr.write('%s\n-----\n' % filename)
with open(filename, 'rb') as f:
sys.stderr.write(f.read() + '\n-----\n')
dump(intermediate_manifest)
dump(our_manifest)
dump(assert_manifest)
sys.stderr.write(
'Linker generated manifest "%s" added to final manifest "%s" '
'(result in "%s"). '
'Were /MANIFEST switches used in #pragma statements? ' % (
intermediate_manifest, our_manifest, assert_manifest))
return 1
def ExecManifestWrapper(self, arch, *args):
"""Run manifest tool with environment set. Strip out undesirable warning
(some XML blocks are recognized by the OS loader, but not the manifest
tool)."""
env = self._GetEnv(arch)
popen = subprocess.Popen(args, shell=True, env=env,
stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
out, _ = popen.communicate()
for line in out.splitlines():
if line and 'manifest authoring warning 81010002' not in line:
print line
return popen.returncode
def ExecManifestToRc(self, arch, *args):
"""Creates a resource file pointing a SxS assembly manifest.
|args| is tuple containing path to resource file, path to manifest file
and resource name which can be "1" (for executables) or "2" (for DLLs)."""
manifest_path, resource_path, resource_name = args
with open(resource_path, 'wb') as output:
output.write('#include <windows.h>\n%s RT_MANIFEST "%s"' % (
resource_name,
os.path.abspath(manifest_path).replace('\\', '/')))
def ExecMidlWrapper(self, arch, outdir, tlb, h, dlldata, iid, proxy, idl,
*flags):
"""Filter noisy filenames output from MIDL compile step that isn't
quietable via command line flags.
"""
args = ['midl', '/nologo'] + list(flags) + [
'/out', outdir,
'/tlb', tlb,
'/h', h,
'/dlldata', dlldata,
'/iid', iid,
'/proxy', proxy,
idl]
env = self._GetEnv(arch)
popen = subprocess.Popen(args, shell=True, env=env,
stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
out, _ = popen.communicate()
# Filter junk out of stdout, and write filtered versions. Output we want
# to filter is pairs of lines that look like this:
# Processing C:\Program Files (x86)\Microsoft SDKs\...\include\objidl.idl
# objidl.idl
lines = out.splitlines()
prefixes = ('Processing ', '64 bit Processing ')
processing = set(os.path.basename(x)
for x in lines if x.startswith(prefixes))
for line in lines:
if not line.startswith(prefixes) and line not in processing:
print line
return popen.returncode
def ExecAsmWrapper(self, arch, *args):
"""Filter logo banner from invocations of asm.exe."""
env = self._GetEnv(arch)
popen = subprocess.Popen(args, shell=True, env=env,
stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
out, _ = popen.communicate()
for line in out.splitlines():
if (not line.startswith('Copyright (C) Microsoft Corporation') and
not line.startswith('Microsoft (R) Macro Assembler') and
not line.startswith(' Assembling: ') and
line):
print line
return popen.returncode
def ExecRcWrapper(self, arch, *args):
"""Filter logo banner from invocations of rc.exe. Older versions of RC
don't support the /nologo flag."""
env = self._GetEnv(arch)
popen = subprocess.Popen(args, shell=True, env=env,
stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
out, _ = popen.communicate()
for line in out.splitlines():
if (not line.startswith('Microsoft (R) Windows (R) Resource Compiler') and
not line.startswith('Copyright (C) Microsoft Corporation') and
line):
print line
return popen.returncode
def ExecActionWrapper(self, arch, rspfile, *dir):
"""Runs an action command line from a response file using the environment
for |arch|. If |dir| is supplied, use that as the working directory."""
env = self._GetEnv(arch)
# TODO(scottmg): This is a temporary hack to get some specific variables
# through to actions that are set after gyp-time. http://crbug.com/333738.
for k, v in os.environ.iteritems():
if k not in env:
env[k] = v
args = open(rspfile).read()
dir = dir[0] if dir else None
return subprocess.call(args, shell=True, env=env, cwd=dir)
def ExecClCompile(self, project_dir, selected_files):
"""Executed by msvs-ninja projects when the 'ClCompile' target is used to
build selected C/C++ files."""
project_dir = os.path.relpath(project_dir, BASE_DIR)
selected_files = selected_files.split(';')
ninja_targets = [os.path.join(project_dir, filename) + '^^'
for filename in selected_files]
cmd = ['ninja.exe']
cmd.extend(ninja_targets)
return subprocess.call(cmd, shell=True, cwd=BASE_DIR)
if __name__ == '__main__':
sys.exit(main(sys.argv[1:]))
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