Add option to replace names with hardlinks to duplicate content.

Add Makefile to run 'make check'.

1 files changed, 24 insertions, 3 deletions

diff --git a/dupfiles b/dupfiles
index 6c0d2b8..950c170 100755
--- a/dupfiles
+++ b/dupfiles
@@ -18,6 +18,7 @@
 
 
 import hashlib
+import optparse
 import os
 import sys
 
@@ -56,13 +57,33 @@ class DuplicateFileFinder(object):
         return hashlib.md5(file(pathname, 'rb').read()).digest()
 
 
+def make_hardlinks(duplicates):
+    canonical = duplicates.pop()
+    for pathname in duplicates:
+        os.remove(pathname)
+        os.link(canonical, pathname)
+
+
+def report(duplicates):
+    sys.stdout.write('\n'.join(duplicates))
+    sys.stdout.write('\n')
+
+
 def main():
+    parser = optparse.OptionParser()
+    parser.add_option('--make-hardlinks', action='store_true',
+                      help='hardlink duplicate files to each other')
+
+    opts, args = parser.parse_args()
+
     dupfinder = DuplicateFileFinder()
-    for dirname in sys.argv[1:]:
+    for dirname in args:
         dupfinder.collect(dirname)
     for duplicates in dupfinder.duplicates():
-        print '\n'.join(duplicates)
-        print
+        if opts.make_hardlinks:
+            make_hardlinks(duplicates)
+        else:
+            report(duplicates)
 
 
 if __name__ == '__main__':