dgrove@google.com
4bc64b8c2b
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@7 260f80e4-7a28-3924-810f-c04153c831b5
49 lines
1.5 KiB
Python
49 lines
1.5 KiB
Python
# Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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# for details. All rights reserved. Use of this source code is governed by a
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# BSD-style license that can be found in the LICENSE file.
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"""Wraps jscoverage to instrument a single file more efficently.
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JScoverage crawls directories recursively to copy and instrument everything
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under a directory. This turns out to be too slow for our use, because our
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generated .js files live in directories with > 100K files. Even though
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jscoverage has a flag ('--exclude') to skip some files for
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instrumentation/copying, it stills crawls recursively everything under the
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directory.
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This script is a simple wrap on top of jscoverage. It creates a temporary
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directory, copies the file we want to instrument alone, and runs jscoverage
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within this small directory.
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"""
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import os
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import subprocess
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import sys
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def main():
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if len(sys.argv) < 3:
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print "usage: %s <jscoverage-path> filepath outdir"
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return 1
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jscoveragecmd = sys.argv[1]
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filepath = sys.argv[2]
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outdir = sys.argv[3]
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tmpdir = filepath + "_"
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copypath = os.path.join(tmpdir, os.path.basename(filepath))
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try:
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os.mkdir(tmpdir)
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except Exception:
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if not os.path.exists(tmpdir):
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raise
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with open(filepath, 'r') as f1:
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with open(copypath, 'w') as f2:
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f2.write(f1.read())
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status = subprocess.call([jscoveragecmd, tmpdir, outdir])
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os.remove(copypath)
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os.rmdir(tmpdir)
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return status
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if __name__ == '__main__':
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sys.exit(main())
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