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1.2
date	2010.10.11.17.22.16;	author dim;	state dead;
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1.1
date	2010.06.09.17.59.52;	author rdivacky;	state Exp;
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1.2
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@SVN rev 213695 on 2010-10-11 17:22:16Z by dim

Remove more unneeded files and directories from contrib/llvm.  This
still allows us to build tblgen and clang, and further reduces the
footprint in the tree.

Approved by:	rpaulo (mentor)
@
text
@#!/usr/bin/env python

"""CaptureCmd - A generic tool for capturing information about the
invocations of another program.

Usage
--
1. Move the original tool to a safe known location.

2. Link CaptureCmd to the original tool's location.

3. Define CAPTURE_CMD_PROGRAM to the known location of the original
tool; this must be an absolute path.

4. Define CAPTURE_CMD_DIR to a directory to write invocation
information to.
"""

import hashlib
import os
import sys
import time

def saveCaptureData(prefix, dir, object):
    string = repr(object) + '\n'
    key = hashlib.sha1(string).hexdigest()
    path = os.path.join(dir,
                        prefix + key)
    if not os.path.exists(path):
        f = open(path, 'wb')
        f.write(string)
        f.close()
    return prefix + key

def main():
    program = os.getenv('CAPTURE_CMD_PROGRAM')
    dir = os.getenv('CAPTURE_CMD_DIR')
    fallback = os.getenv('CAPTURE_CMD_FALLBACK')
    if not program:
        raise ValueError('CAPTURE_CMD_PROGRAM is not defined!')
    if not dir:
        raise ValueError('CAPTURE_CMD_DIR is not defined!')

    # Make the output directory if it doesn't already exist.
    if not os.path.exists(dir):
        os.mkdir(dir, 0700)

    # Get keys for various data.
    env = os.environ.items()
    env.sort()
    envKey = saveCaptureData('env-', dir, env)
    cwdKey = saveCaptureData('cwd-', dir, os.getcwd())
    argvKey = saveCaptureData('argv-', dir, sys.argv)
    entry = (time.time(), envKey, cwdKey, argvKey)
    saveCaptureData('cmd-', dir, entry)

    if fallback:
        pid = os.fork()
        if not pid:
            os.execv(program, sys.argv)
            os._exit(1)
        else:
            res = os.waitpid(pid, 0)
            if not res:
                os.execv(fallback, sys.argv)
                os._exit(1)
            os._exit(res)                
    else:
        os.execv(program, sys.argv)
        os._exit(1)

if __name__ == '__main__':
    main()
@


1.1
log
@SVN rev 208954 on 2010-06-09 17:59:52Z by rdivacky

Import LLVM/clang from vendor stripped of docs/ test/ website/ www/ examples/
in llvm/ and/or llvm/contrib/clang/ respectively.

Approved by:	ed (mentor)
Approved by:	core
@
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