[PATCH 07 of 11] [RFC] Add support for environment variable HG_TRUSTED_USERS

[Markus F.X.J. Oberhumer]

# HG changeset patch
# User Markus F.X.J. Oberhumer <markus at oberhumer.com>
# Date 1182775580 -7200
# Node ID da57c9e729038e4e10db387905f39c180210b869
# Parent  627752dddfa1b3d83363f9153b463034c3041ea5
[RFC] Add support for environment variable HG_TRUSTED_USERS.

Info: this is needed when using ssh shell access on sourceforge.net,
  otherwise project group members will not trust some hgrc settings.

The remote "hg-team" shell script we use on sourceforge.net looks
like this:

  #! /bin/sh
  umask 002
  # trust all users of our project group
  HG_TRUSTED_USERS="user1,user2,user3"
  export HG_TRUSTED_USERS
  exec /PATH_TO_REAL_HG/hg ${1+"$@"}

And the local .hg/hgrc looks like this:

  [ui]
  remotecmd = /PATH_TO_HG_TEAM_ON_SOURCEFORGE_NET/hg-team

Finally the remote repository must have mode 0664 (i.e. g+rw) on all
files and mode 02771 (i.e. g+rwxs) on all directories.

diff --git a/mercurial/ui.py b/mercurial/ui.py
--- a/mercurial/ui.py
+++ b/mercurial/ui.py
@@ -58,6 +58,10 @@ class ui(object):
                 self.ucdata = dupconfig(self.parentui.ucdata)
             if self.parentui.overlay:
                 self.overlay = dupconfig(self.parentui.overlay)
+        s = os.environ.get("HG_TRUSTED_USERS")
+        if s:
+            for u in filter(None, re.split(r"\s*,\s*", s)):
+                self.trusted_users[u] = 1
 
     def __getattr__(self, key):
         return getattr(self.parentui, key)