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Find executables in %PATH% that match PATTERN.

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include README.txt
include MIT-LICENSE.txt
MIT-LICENSE.txt
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The MIT License
 
Copyright (c) 2010 arn.zart at gmail dot com
 
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
 
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
 
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
README.txt
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grepath - find executables in PATH that match PATTERN
=====================================================
 
``grepath`` utility prints full path to executables that match
given file-pattern or regular expression.
 
Examples:
 
* To print executables that contain 'pdf' anywhere in their name::
 
$ grepath pdf
/usr/bin/ps2pdf12
/usr/bin/ps2pdf13
...[snip]...
/usr/bin/simpdftex
/usr/bin/dvipdf
* To find executables that don't have 'e' after 'win' in their name::
 
C:\> grepath -e "win[^e]"
C:\windows\system32\winhlp32.exe
C:\windows\system32\winver.exe
C:\windows\winhlp32.exe
C:\windows\winhelp.exe
If ``*.py`` files are not associated with ``python.exe`` then the
script can be invoked using::
C:\> python \path\to\grepath.py --help
To print all available options, type::
 
$ grepath --help
 
Files are licensed under the MIT License. See the file MIT-LICENSE.txt
for details.
 
The latest version is at http://gist.github.com/79233
grepath
Python
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#!/usr/bin/env python
import grepath
 
if __name__=="__main__":
grepath.main()
grepath.py
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#!/usr/bin/env python
"""Find executables in %PATH% that match PATTERN.
 
"""
#XXX: remove --use-pathext option
 
import fnmatch, itertools, os, re, sys, warnings
from optparse import OptionParser
from stat import S_IMODE, S_ISREG, ST_MODE
from subprocess import PIPE, Popen
 
__all__ = ["is_executable", "samefile"]
 
def warn_import(*args):
"""pass '-Wd' option to python interpreter to see these warnings."""
warnings.warn("%r" % (args,), ImportWarning, stacklevel=2)
 
 
class samefile_win:
"""
http://timgolden.me.uk/python/win32_how_do_i/see_if_two_files_are_the_same_file.html
"""
@staticmethod
def get_read_handle (filename):
return win32file.CreateFile (
filename,
win32file.GENERIC_READ,
win32file.FILE_SHARE_READ,
None,
win32file.OPEN_EXISTING,
0,
None
)
 
@staticmethod
def get_unique_id (hFile):
(attributes,
created_at, accessed_at, written_at,
volume,
file_hi, file_lo,
n_links,
index_hi, index_lo
) = win32file.GetFileInformationByHandle (hFile)
return volume, index_hi, index_lo
 
@staticmethod
def samefile_win(filename1, filename2):
"""Whether filename1 and filename2 represent the same file.
 
It works for subst, ntfs hardlinks, junction points.
It works unreliably for network drives.
 
Based on GetFileInformationByHandle() Win32 API call.
http://timgolden.me.uk/python/win32_how_do_i/see_if_two_files_are_the_same_file.html
"""
if samefile_generic(filename1, filename2): return True
try:
hFile1 = samefile_win.get_read_handle (filename1)
hFile2 = samefile_win.get_read_handle (filename2)
are_equal = (samefile_win.get_unique_id (hFile1)
== samefile_win.get_unique_id (hFile2))
hFile2.Close ()
hFile1.Close ()
return are_equal
except win32file.error:
return None
 
 
def canonical_path(path):
"""NOTE: it might return wrong path for paths with symbolic links."""
return os.path.realpath(os.path.normcase(path))
 
 
def samefile_generic(path1, path2):
return canonical_path(path1) == canonical_path(path2)
 
 
class is_executable_destructive:
@staticmethod
def error_message(barename):
r"""
"'%(barename)s' is not recognized as an internal or external\r\n
command, operable program or batch file.\r\n"
 
in Russian:
"""
return '"%(barename)s" \xad\xa5 \xef\xa2\xab\xef\xa5\xe2\xe1\xef \xa2\xad\xe3\xe2\xe0\xa5\xad\xad\xa5\xa9 \xa8\xab\xa8 \xa2\xad\xa5\xe8\xad\xa5\xa9\r\n\xaa\xae\xac\xa0\xad\xa4\xae\xa9, \xa8\xe1\xaf\xae\xab\xad\xef\xa5\xac\xae\xa9 \xaf\xe0\xae\xa3\xe0\xa0\xac\xac\xae\xa9 \xa8\xab\xa8 \xaf\xa0\xaa\xa5\xe2\xad\xeb\xac \xe4\xa0\xa9\xab\xae\xac.\r\n' % dict(barename=barename)
 
@staticmethod
def is_executable_win_destructive(path):
# assume path <-> barename that is false in general
barename = os.path.splitext(os.path.basename(path))[0]
p = Popen(barename, stdout=PIPE, stderr=PIPE, shell=True)
stdout, stderr = p.communicate()
return p.poll() != 1 or stdout != '' or stderr != error_message(barename)
 
 
def is_executable_win(path):
"""Based on:
http://timgolden.me.uk/python/win32_how_do_i/tell-if-a-file-is-executable.html
 
Known bugs: treat some "*~" files as executable, e.g. some "*.bat~" files
"""
try:
_, executable = FindExecutable(path)
return bool(samefile(GetLongPathName(executable), path))
except error:
return None # not an exe or a document with assoc.
 
 
def is_executable_posix(path):
"""Whether the file is executable.
 
Based on which.py from stdlib
"""
#XXX it ignores effective uid, guid?
try: st = os.stat(path)
except os.error:
return None
 
isregfile = S_ISREG(st[ST_MODE])
isexemode = (S_IMODE(st[ST_MODE]) & 0111)
return bool(isregfile and isexemode)
 
try:
#XXX replace with ctypes?
from win32api import FindExecutable, GetLongPathName, error
is_executable = is_executable_win
except ImportError, e:
warn_import("is_executable: fall back on posix variant", e)
is_executable = is_executable_posix
 
try: samefile = os.path.samefile
except AttributeError, e:
warn_import("samefile: fallback to samefile_win", e)
try:
import win32file
samefile = samefile_win.samefile_win
except ImportError, e:
warn_import("samefile: fallback to generic", e)
samefile = samefile_generic
 
def main():
parser = OptionParser(usage="""
%prog [options] PATTERN
%prog [options] -e PATTERN""", description=__doc__)
opt = parser.add_option
opt("-e", "--regex", metavar="PATTERN",
help="use PATTERN as a regular expression")
opt("--ignore-case", action="store_true", default=True,
help="""[default] ignore case when --regex is present; for \
non-regex PATTERN both FILENAME and PATTERN are first \
case-normalized if the operating system requires it otherwise \
unchanged.""")
opt("--no-ignore-case", dest="ignore_case", action="store_false")
opt("--use-pathext", action="store_true", default=True,
help="[default] whether to use %PATHEXT% environment variable")
opt("--no-use-pathext", dest="use_pathext", action="store_false")
opt("--show-non-executable", action="store_true", default=False,
help="show non executable files")
 
(options, args) = parser.parse_args()
 
if len(args) != 1 and not options.regex:
parser.error("incorrect number of arguments")
if not options.regex:
pattern = args[0]
del args
 
if options.regex:
filepred = re.compile(options.regex, options.ignore_case and re.I).search
else:
fnmatch_ = fnmatch.fnmatch if options.ignore_case else fnmatch.fnmatchcase
for file_pattern_symbol in "*?":
if file_pattern_symbol in pattern:
break
else: # match in any place if no explicit file pattern symbols supplied
pattern = "*" + pattern + "*"
filepred = lambda fn: fnmatch_(fn, pattern)
 
if not options.regex and options.ignore_case:
filter_files = lambda files: fnmatch.filter(files, pattern)
else:
filter_files = lambda files: itertools.ifilter(filepred, files)
 
if options.use_pathext:
pathexts = frozenset(map(str.upper,
os.environ.get('PATHEXT', '').split(os.pathsep)))
 
seen = set()
for dirpath in os.environ.get('PATH', '').split(os.pathsep):
if os.path.isdir(dirpath): # assume no expansion needed
# visit "each" directory only once
# it is unaware of subst drives, junction points, symlinks, etc
rp = canonical_path(dirpath)
if rp in seen: continue
seen.add(rp); del rp
 
for filename in filter_files(os.listdir(dirpath)):
path = os.path.join(dirpath, filename)
isexe = is_executable(path)
 
if isexe == False and is_executable == is_executable_win:
# path is a document with associated program
# check whether it is a script (.pl, .rb, .py, etc)
if not isexe and options.use_pathext:
ext = os.path.splitext(path)[1]
isexe = ext.upper() in pathexts
 
if isexe:
print path
elif options.show_non_executable:
print "non-executable:", path
 
 
if __name__=="__main__":
main()
setup.py
Python
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import os
import sys
 
from distutils.core import setup
 
def read_file(relpath):
return open(os.path.join(os.path.dirname(__file__), relpath)).read()
 
_readme_lines = read_file("README.txt").splitlines()
 
#XXX tests, docs, *.bat on Windows, no extension on Linux
CLASSIFIERS = """\
Development Status :: 2 - Pre-Alpha
Environment :: Console
Intended Audience :: Developers
Intended Audience :: End Users/Desktop
Intended Audience :: System Administrators
License :: OSI Approved :: MIT License
Operating System :: Microsoft :: Windows
Operating System :: POSIX :: Linux
Programming Language :: Python :: 2
Topic :: Software Development :: Libraries :: Python Modules
Topic :: System :: Systems Administration
Topic :: Utilities
"""
 
NAME = 'grepath'
VERSION = '0.0.2'
DESCRIPTION = _readme_lines[0]
LONG_DESCRIPTION = "\n".join(_readme_lines[2:])
URL = "http://gist.github.com/79233"
LICENSE = 'MIT'
CLASSIFIERS = filter(len, CLASSIFIERS.split('\n'))
AUTHOR = "zed"
AUTHOR_EMAIL = "arn.zart+zed@gmail.com"
PLATFORMS = ["Windows", "Linux"]
 
 
if 'posix' in sys.builtin_module_names:
script_name = NAME
else: # nt, os2, ce
script_name = NAME+".py"
 
 
if __name__=="__main__":
setup(
name=NAME,
version=VERSION,
description=DESCRIPTION,
long_description=LONG_DESCRIPTION,
url=URL,
license=LICENSE,
classifiers=CLASSIFIERS,
author=AUTHOR,
author_email=AUTHOR_EMAIL,
platforms=PLATFORMS,
py_modules=[NAME],
scripts=[script_name],
)

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