upgrade_dir for upgrading to newer config files

(more cautious than current upgrade feature)

IPython/upgrade_dir.py

@@ -0,0 +1,66 b''
+""" A script/util to upgrade all files in a directory
+
+This is rather conservative in its approach, only copying/overwriting
+new and unedited files.
+
+To be used by "upgrade" feature.
+"""
+from path import path
+import md5,pickle
+
+def showdiff(old,new):
+    import difflib
+    d = difflib.Differ()
+    print "".join(d.compare(old.lines(),new.lines()))
+
+def upgrade_dir(srcdir, tgtdir):
+    """ Copy over all files in srcdir to tgtdir w/ native line endings 
+    
+    Creates .upgrade_report in tgtdir that stores md5sums of all files
+    to notice changed files b/w upgrades.
+    """
+
+    def pr(s):
+        print s
+
+    def ignorable(p):
+        if p.lower().startswith('.svn'):
+            return True
+        return False
+            
+        
+    files = [path(srcdir).relpathto(p) for p in path(srcdir).walkfiles()]
+    #print files
+    rep = tgtdir / '.upgrade_report'
+    try:
+        rpt = pickle.load(rep.open())
+    except:
+        rpt = {}
+        
+    for f in files:
+        if ignorable(f):
+            continue
+        src = srcdir / f
+        tgt = tgtdir / f
+        if not tgt.isfile():
+            pr("Creating %s" % str(tgt))
+            
+            tgt.write_text(src.text())
+            rpt[str(tgt)] = md5.new(tgt.bytes()).hexdigest()
+        else:
+            cont = tgt.bytes()
+            sum = rpt.get(str(tgt), None)
+            #print sum
+            if sum and md5.new(cont).hexdigest() == sum:
+                pr("Unedited, installing new %s" % tgt)
+                rpt[str(tgt)] = md5.new(tgt.bytes()).hexdigest()
+            else:
+                pr('Modified, skipping %s, diffs below' % tgt)
+                #rpt[str(tgt)] = md5.new(tgt.bytes()).hexdigest()
+                showdiff(tgt,src)
+            pass
+        #print rpt
+    pickle.dump(rpt, rep.open('w'))
+            
+import sys
+upgrade_dir(path(sys.argv[1]), path(sys.argv[2]))
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