hgweb: overwrite cwd to resolve file patterns relative to repo (issue4568)

hgweb: overwrite cwd to resolve file patterns relative to repo (issue4568)

It's useless to handle file patterns as relative to the cwd of the server
process. The only sensible way in hgweb is to resolve paths relative to the
repository root.

It seems dirstate.getcwd() isn't used to get a real file path, so this patch
won't cause problem.

--- a/mercurial/dirstate.py	Sun Sep 20 20:08:22 2015 +0900
+++ b/mercurial/dirstate.py	Sun Sep 20 20:11:31 2015 +0900
@@ -42,6 +42,10 @@
         # ntpath.join(root, '') of Python 2.7.9 does not add sep if root is
         # UNC path pointing to root share (issue4557)
         self._rootdir = pathutil.normasprefix(root)
+        # internal config: ui.forcecwd
+        forcecwd = ui.config('ui', 'forcecwd')
+        if forcecwd:
+            self._cwd = forcecwd
         self._dirty = False
         self._dirtypl = False
         self._lastnormaltime = 0

--- a/mercurial/hgweb/hgweb_mod.py	Sun Sep 20 20:08:22 2015 +0900
+++ b/mercurial/hgweb/hgweb_mod.py	Sun Sep 20 20:11:31 2015 +0900
@@ -205,6 +205,9 @@
         r.baseui.setconfig('ui', 'report_untrusted', 'off', 'hgweb')
         r.ui.setconfig('ui', 'nontty', 'true', 'hgweb')
         r.baseui.setconfig('ui', 'nontty', 'true', 'hgweb')
+        # resolve file patterns relative to repo root
+        r.ui.setconfig('ui', 'forcecwd', r.root, 'hgweb')
+        r.baseui.setconfig('ui', 'forcecwd', r.root, 'hgweb')
         # displaying bundling progress bar while serving feel wrong and may
         # break some wsgi implementation.
         r.ui.setconfig('progress', 'disable', 'true', 'hgweb')

--- a/tests/test-hgweb-commands.t	Sun Sep 20 20:08:22 2015 +0900
+++ b/tests/test-hgweb-commands.t	Sun Sep 20 20:11:31 2015 +0900
@@ -2050,6 +2050,35 @@
   	top: -1px;
   }
 
+Stop and restart the server at the directory different from the repository
+root. Even in such case, file patterns should be resolved relative to the
+repository root. (issue4568)
+
+  $ killdaemons.py
+  $ hg serve --config server.preferuncompressed=True -n test \
+  > -p $HGPORT -d --pid-file=`pwd`/hg.pid -E `pwd`/errors.log \
+  > --cwd .. -R `pwd`
+  $ cat hg.pid >> $DAEMON_PIDS
+
+  $ get-with-headers.py 127.0.0.1:$HGPORT 'log?rev=adds("foo")&style=raw'
+  200 Script output follows
+  
+  
+  # HG changesets search
+  # Node ID cad8025a2e87f88c06259790adfa15acb4080123
+  # Query "adds("foo")"
+  # Mode revset expression search
+  
+  changeset:   2ef0ac749a14e4f57a5a822464a0902c6f7f448f
+  revision:    0
+  user:        test
+  date:        Thu, 01 Jan 1970 00:00:00 +0000
+  summary:     base
+  tag:         1.0
+  bookmark:    anotherthing
+  
+  
+
 Stop and restart with HGENCODING=cp932 and preferuncompressed
 
   $ killdaemons.py