splicemap: improve error handling when source is subversion (issue2084)

Implemented error handling on splicemap file when source is
subversion (This checks are similar to when source is hg or git).

The revision string is expected to be of svn:<uuid><path>@<number>
format.

the test case has been enhanced to check this format.

hgext/convert/common.py

@@ -67,8 +67,7 b' class converter_source(object):'
         """ fails if revstr is not a 40 byte hex. mercurial and git both uses
             such format for their revision numbering
         """
-        matchobj = re.match(r'[0-9a-fA-F]{40,40}$', revstr)
-        if matchobj is None:
+        if not re.match(r'[0-9a-fA-F]{40,40}$', revstr):
             raise util.Abort(_('splicemap entry %s is not a valid revision'
                                ' identifier') % revstr)
 

hgext/convert/subversion.py

@@ -452,6 +452,14 b' class svn_source(converter_source):'
         del self.commits[rev]
         return commit
 
+    def checkrevformat(self, revstr):
+        """ fails if revision format does not match the correct format"""
+        if not re.match(r'svn:[0-9a-f]{8,8}-[0-9a-f]{4,4}-'
+                              '[0-9a-f]{4,4}-[0-9a-f]{4,4}-[0-9a-f]'
+                              '{12,12}(.*)\@[0-9]+$',revstr):
+            raise util.Abort(_('splicemap entry %s is not a valid revision'
+                               ' identifier') % revstr)
+
     def gettags(self):
         tags = {}
         if self.tags is None:

tests/test-convert-svn-source.t

@@ -16,6 +16,8 b''
 #else
   $ SVNREPOURL=file://`python -c "import urllib, sys; sys.stdout.write(urllib.quote(sys.argv[1]))" "$SVNREPOPATH"`
 #endif
+  $ INVALIDREVISIONID=svn:x2147622-4a9f-4db4-a8d3-13562ff547b2/proj%20B/mytrunk@1
+  $ VALIDREVISIONID=svn:a2147622-4a9f-4db4-a8d3-13562ff547b2/proj%20B/mytrunk/mytrunk@1
 
 Now test that it works with trunk/tags layout, but no branches yet.
 
@@ -168,6 +170,15 b' Test filemap'
   |
   o  0 second letter files: letter2.txt
   
+test invalid splicemap1
+
+  $ cat > splicemap <<EOF
+  > $INVALIDREVISIONID $VALIDREVISIONID
+  > EOF
+  $ hg convert --splicemap splicemap "$SVNREPOURL/proj%20B/mytrunk" smap
+  initializing destination smap repository
+  abort: splicemap entry svn:x2147622-4a9f-4db4-a8d3-13562ff547b2/proj%20B/mytrunk@1 is not a valid revision identifier
+  [255]
 
 Test stop revision
   $ hg convert --rev 1 "$SVNREPOURL/proj%20B/mytrunk" stoprev