[PATCH 3 of 3 V2] localrepo: better error message when revlog error and file addition (issue4675)

[Jordi Gutiérrez Hermoso]

# HG changeset patch
# User Jordi Gutiérrez Hermoso <jordigh at octave.org>
# Date 1432239912 14400
#      Thu May 21 16:25:12 2015 -0400
# Node ID 6374820d9c459b010d8ada703c22eed5095f8420
# Parent  ae1b7ac00f0edb3fd9c8d7c4f0076c5becfab2d3
localrepo: better error message when revlog error and file addition (issue4675)

At this level we have enough context for saying which filename caused
the revlog error, and we can also add the hint from the revlog
exception, if any.

diff --git a/mercurial/localrepo.py b/mercurial/localrepo.py
--- a/mercurial/localrepo.py
+++ b/mercurial/localrepo.py
@@ -1348,7 +1348,10 @@ class localrepository(object):
         text = fctx.data()
         if fparent2 != nullid or flog.cmp(fparent1, text) or meta:
             changelist.append(fname)
-            return flog.add(text, meta, tr, linkrev, fparent1, fparent2)
+            try:
+                return flog.add(text, meta, tr, linkrev, fparent1, fparent2)
+            except error.RevlogError as exc:
+                raise util.Abort("%s: %s" % (exc, fname), hint=exc.hint)
         # are just the flags changed during merge?
         elif fname in manifest1 and manifest1.flags(fname) != fctx.flags():
             changelist.append(fname)