svn commit: r1721534 - /subversion/trunk/notes/move-tracking/path_pairs_to_eid_map.py

[ju...@apache.org]

Author: julianfoad
Date: Wed Dec 23 12:26:55 2015
New Revision: 1721534

URL: http://svn.apache.org/viewvc?rev=1721534&view=rev
Log:
* notes/move-tracking/path_pairs_to_eid_map.py
  Take input from command-line arguments.

Modified:
    subversion/trunk/notes/move-tracking/path_pairs_to_eid_map.py

Modified: subversion/trunk/notes/move-tracking/path_pairs_to_eid_map.py
URL: http://svn.apache.org/viewvc/subversion/trunk/notes/move-tracking/path_pairs_to_eid_map.py?rev=1721534&r1=1721533&r2=1721534&view=diff
==============================================================================
--- subversion/trunk/notes/move-tracking/path_pairs_to_eid_map.py (original)
+++ subversion/trunk/notes/move-tracking/path_pairs_to_eid_map.py Wed Dec 23 12:26:55 2015
@@ -1,5 +1,7 @@
 #!/usr/bin/env python
 
+# Usage: path_pairs_to_eid_map.py [INITIAL-PATH FINAL-PATH ...]
+#
 # Convert a list of (initial_path, final_path) pairs to a pair of element
 # mappings:
 #   initial_map = {eid: (parent_eid, name), ...}
@@ -15,8 +17,12 @@
 # assume (A -> A) and (X -> X). Another example: for input [(A -> X),
 # (A/B/C -> X/B/D)], assume (A/B -> X/B).
 
+import sys
 import posixpath
 
+class ArgumentsError(Exception):
+  pass
+
 # input: a list of pairs of paths
 input_example_1 = [
   ("A/D/H", "A"),
@@ -29,6 +35,17 @@ input_example_2 = [
 ]
 input_path_pairs = input_example_1
 
+# Read input from pairs of command-line arguments, if given.
+if len(sys.argv) > 1:
+  n_args = len(sys.argv) - 1
+  if n_args % 2:
+    raise ArgumentsError("Need an even number (not %d) of paths, to be used in pairs" %
+                         n_args)
+  argv = sys.argv[1:]
+  argv = [None if (a == '' or a == 'None' or a == 'nil') else a
+          for a in argv]
+  input_path_pairs = zip(argv[::2], argv[1::2])
+
 print("Input:")
 for e in input_path_pairs:
   print("  " + str(e))