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annotate python/lsex.py @ 424:d214e0f38ab1
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author | Jeff Hammel <jhammel@mozilla.com> |
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date | Tue, 06 Aug 2013 16:04:28 -0700 |
parents | 77e7cab3e9f2 |
children | 20aa4a6ef719 |
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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 """ |
367 | 19 list of executable files on the path |
20 | |
21 - path: list or PATH-style string of directories to search. | |
22 if not specified, use system PATH | |
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23 """ |
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24 |
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25 if path is None: |
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26 # use system path |
367 | 27 path = os.environ['PATH'] |
28 if isinstance(path, basestring): | |
29 path = ordered_set(path.split(os.pathsep)) | |
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30 |
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31 executables = [] |
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32 |
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33 # add the executable files to the list |
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34 for i in path: |
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35 if not os.path.isdir(i): |
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36 continue |
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37 files = [ os.path.join(i,j) for j in os.listdir(i) ] |
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38 files = filter(lambda x: os.access(x, os.X_OK), files) |
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39 files.sort() # just to make the output pretty |
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40 executables.extend(files) |
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41 return executables |
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42 |
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43 def executable_names(path=None): |
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44 executables = lsex(path) |
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45 executables = set([os.path.basename(i) for i in executables]) |
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46 return executables |
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47 |
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48 if __name__ == '__main__': |
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49 parser = OptionParser() |
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50 parser.add_option('--names', action='store_true', default=False, |
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51 help="list only the set of names") |
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52 |
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53 options, args = parser.parse_args() |
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54 if options.names: |
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55 for i in sorted(executable_names()): |
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56 print i |
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57 sys.exit(0) |
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58 |
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59 for i in lsex(): |
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60 print i |