From 25936f0ccea8bfa7bfc6226f47ea0ef651a8ef7e Mon Sep 17 00:00:00 2001
From: Lars Wirzenius <liw@liw.fi>
Date: Sat, 12 Feb 2011 22:13:18 +0000
Subject: Make hardlinks only when uid, gid, mode match.

---
 dupfiles | 20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

(limited to 'dupfiles')

diff --git a/dupfiles b/dupfiles
index b6f3df1..c2c7dc3 100755
--- a/dupfiles
+++ b/dupfiles
@@ -217,12 +217,22 @@ class Dupfiles(cliapp.Application):
             else:
                 self.report(duplicates)
 
-    def make_hardlinks(self, duplicates):
-        canonical = duplicates.pop()
-        for pathname in duplicates:
-            os.remove(pathname)
-            os.link(canonical, pathname)
+    def get_meta(self, name):
+        st = os.lstat(name)
+        return st.st_uid, st.st_gid, st.st_mode
 
+    def make_hardlinks(self, duplicates):
+        dups = [(name, self.get_meta(name)) for name in duplicates]
+        
+        while dups:
+            canonical, meta = dups[0]
+            dups = dups[1:]
+            same = [x for x, y in dups if y == meta]
+            dups = [(x,y) for x, y in dups if y != meta]
+            for pathname in same:
+                os.remove(pathname)
+                os.link(canonical, pathname)
+    
     def remove_all_but_one(self, duplicates):
         keep = duplicates.pop()
         for pathname in duplicates:
-- 
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