add basic command line UI with optparse

Author: pierre-haessig

bin/pyflakes

@@ -1,4 +1,4 @@
 #!/usr/bin/python
 
-from pyflakes.scripts.pyflakes import main
+from pyflakes.scripts.pyflakes_cmd import main
 main()

pyflakes/scripts/pyflakes.py renamed to pyflakes/scripts/pyflakes_cmd.py

@@ -6,8 +6,10 @@
 import sys
 import os
 import _ast
+import textwrap
+from optparse import OptionParser
 
-checker = __import__('pyflakes.checker').checker
+from pyflakes import checker, __version__
 
 def check(codeString, filename):
     """
@@ -73,8 +75,26 @@ def checkPath(filename):
 
 
 def main():
+    usage=textwrap.dedent("""\
+          pyflakes [PATH [PATH]]
+          
+          Checks Python source files for error in each PATH.
+          (PATH can be a Python file or a directory)
+          If no paths are specified, checks source provided on stdin.\
+          """)
+    parser = OptionParser(usage=usage)
+    parser.add_option('-v', '--verbose', action='store_true', 
+                      dest='verbose', default=False,
+                      help='increase output verbosity (not yet implemented)')
+    parser.add_option('-V','--version', action='store_true', 
+                      dest='version',
+                      help='show version information and exit')
+    (options, args) = parser.parse_args()
+    
+    if options.version:
+        sys.exit('pyflakes %s' % __version__)
+    
     warnings = 0
-    args = sys.argv[1:]
     if args:
         for arg in args:
             if os.path.isdir(arg):
@@ -88,3 +108,6 @@ def main():
         warnings += check(sys.stdin.read(), '<stdin>')
 
     raise SystemExit(warnings > 0)
+
+if __name__ == '__main__':
+    main()