Mercurial > hg > config
annotate python/lsex.py @ 129:83bc1e6e5b54
part of a dream realized
author | Jeff Hammel <jhammel@mozilla.com> |
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date | Fri, 18 Mar 2011 11:33:56 -0700 |
parents | 71576cdc28ab |
children | 77e7cab3e9f2 |
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1 #!/usr/bin/env python |
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2 import os |
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3 import sys |
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4 from optparse import OptionParser |
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5 |
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6 # make sure duplicate path elements aren't printed twice |
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7 def ordered_set(alist): |
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8 seen = set() |
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9 new = [] |
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10 for item in alist: |
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11 if item in seen: |
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12 continue |
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13 seen.add(item) |
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14 new.append(item) |
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15 return new |
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16 |
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17 def lsex(path=None): |
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18 """ |
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19 list executable files on the path |
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20 - path: list of directories to search. if not specified, use system path |
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21 """ |
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22 |
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23 if path is None: |
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24 # use system path |
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25 path = ordered_set(os.environ['PATH'].split(':')) |
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26 |
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27 executables = [] |
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28 |
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29 # add the executable files to the list |
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30 for i in path: |
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31 if not os.path.isdir(i): |
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32 continue |
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33 files = [ os.path.join(i,j) for j in os.listdir(i) ] |
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34 files = filter(lambda x: os.access(x, os.X_OK), files) |
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35 files.sort() # just to make the output pretty |
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36 executables.extend(files) |
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37 return executables |
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38 |
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39 def executable_names(path=None): |
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40 executables = lsex(path) |
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41 executables = set([os.path.basename(i) for i in executables]) |
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42 return executables |
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43 |
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44 if __name__ == '__main__': |
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45 parser = OptionParser() |
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46 parser.add_option('--names', action='store_true', default=False, |
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47 help="list only the set of names") |
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48 |
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49 options, args = parser.parse_args() |
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50 if options.names: |
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51 for i in sorted(executable_names()): |
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52 print i |
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53 sys.exit(0) |
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54 |
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55 for i in lsex(): |
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56 print i |