52 lines
1.8 KiB
Python
52 lines
1.8 KiB
Python
# Copyright 2014 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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"""A wrapper to run yasm.
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Its main job is to provide a Python wrapper for GN integration, and to write
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the makefile-style output yasm generates in stdout to a .d file for dependency
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management of .inc files.
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Run with:
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python run_yasm.py <yasm_binary_path> <all other yasm args>
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Note that <all other yasm args> must include an explicit output file (-o). This
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script will append a ".d" to this and write the dependencies there. This script
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will add "-M" to cause yasm to write the deps to stdout, so you don't need to
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specify that.
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"""
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import argparse
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import sys
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import subprocess
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# Extract the output file name from the yasm command line so we can generate a
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# .d file with the same base name.
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parser = argparse.ArgumentParser()
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parser.add_argument("-o", dest="objfile")
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options, _ = parser.parse_known_args()
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objfile = options.objfile
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depfile = objfile + '.d'
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# Assemble.
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result_code = subprocess.call(sys.argv[1:])
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if result_code != 0:
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sys.exit(result_code)
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# Now generate the .d file listing the dependencies. The -M option makes yasm
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# write the Makefile-style dependencies to stdout, but it seems that inhibits
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# generating any compiled output so we need to do this in a separate pass.
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# However, outputting deps seems faster than actually assembling, and yasm is
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# so fast anyway this is not a big deal.
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#
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# This guarantees proper dependency management for assembly files. Otherwise,
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# we would have to require people to manually specify the .inc files they
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# depend on in the build file, which will surely be wrong or out-of-date in
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# some cases.
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deps = subprocess.check_output(sys.argv[1:] + ['-M'])
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with open(depfile, "wb") as f:
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f.write(deps)
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