[PATCH 4 of 5] context: use a the nofsauditor when matching file in history (issue4749)

[Pierre-Yves David]

# HG changeset patch
# User Pierre-Yves David <pierre-yves.david at fb.com>
# Date 1449177826 28800
#      Thu Dec 03 13:23:46 2015 -0800
# Node ID 65797f84a2cc0317f1326215701befd382d04299
# Parent  64a5cdedfc87c8c3d47d8147612e62186a5228c4
# EXP-Topic symlink.issue4749
# Available At http://hg.netv6.net/marmoute-wip/mercurial/
#              hg pull http://hg.netv6.net/marmoute-wip/mercurial/ -r 65797f84a2cc
context: use a the nofsauditor when matching file in history (issue4749)

Before this change, asking for file from history (eg: 'hg cat -r 42 foo/bar')
could fail because of the current content of the working copy (eg: current
"foo" being a symlink). As the working copy state have no influence on the
content of the history, we can safely skip these checks.

diff --git a/mercurial/context.py b/mercurial/context.py
--- a/mercurial/context.py
+++ b/mercurial/context.py
@@ -269,11 +269,11 @@ class basectx(object):
     def match(self, pats=[], include=None, exclude=None, default='glob',
               listsubrepos=False, badfn=None):
         r = self._repo
         return matchmod.match(r.root, r.getcwd(), pats,
                               include, exclude, default,
-                              auditor=r.auditor, ctx=self,
+                              auditor=r.nofsauditor, ctx=self,
                               listsubrepos=listsubrepos, badfn=badfn)
 
     def diff(self, ctx2=None, match=None, **opts):
         """Returns a diff generator for the given contexts and matcher"""
         if ctx2 is None:
diff --git a/tests/test-audit-path.t b/tests/test-audit-path.t
--- a/tests/test-audit-path.t
+++ b/tests/test-audit-path.t
@@ -25,10 +25,49 @@ should still fail - maybe
 
   $ hg add b/b
   abort: path 'b/b' traverses symbolic link 'b' (glob)
   [255]
 
+  $ hg commit -m 'add symlink b'
+
+
+Test symlink traversing when accessing history:
+-----------------------------------------------
+
+(build a changeset where the path exists as a directory)
+
+  $ hg up 0
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ mkdir b
+  $ echo c > b/a
+  $ hg add b/a
+  $ hg ci -m 'add directory b'
+  created new head
+
+Test that hg cat does not do anything wrong the working copy has 'b' as directory
+
+  $ hg cat b/a
+  c
+  $ hg cat -r "desc(directory)" b/a
+  c
+  $ hg cat -r "desc(symlink)" b/a
+  b/a: no such file in rev bc151a1f53bd
+  [1]
+
+Test that hg cat does not do anything wrong the working copy has 'b' as a symlink (issue4749)
+
+  $ hg up 'desc(symlink)'
+  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ hg cat b/a
+  b/a: no such file in rev bc151a1f53bd
+  [1]
+  $ hg cat -r "desc(directory)" b/a
+  c
+  $ hg cat -r "desc(symlink)" b/a
+  b/a: no such file in rev bc151a1f53bd
+  [1]
+
 #endif
 
 
 unbundle tampered bundle