Issue 2867 - Introduce module hgweb and corresponding server role

modules/hgweb/files/hgweb.fcgi

+#!/usr/bin/env python
+#
+# An example CGI script to export multiple hgweb repos, edit as necessary
+
+import re
+
+# adjust python path if not a system-wide install:
+#import sys
+#sys.path.insert(0, "/path/to/python/lib")
+
+# enable demandloading to reduce startup time
+from mercurial import demandimport; demandimport.enable()
+
+# Uncomment to send python tracebacks to the browser if an error occurs:
+#import cgitb
+#cgitb.enable()
+
+# If you'd like to serve pages with UTF-8 instead of your default
+# locale charset, you can do so by uncommenting the following lines.
+# Note that this will cause your .hgrc files to be interpreted in
+# UTF-8 and all your repo files to be displayed using UTF-8.
+#
+#import os
+#os.environ["HGENCODING"] = "UTF-8"
+
+from mercurial.hgweb.hgwebdir_mod import hgwebdir
+from flup.server.fcgi import WSGIServer
+from urllib import unquote
+import sys
+
+# Serialize ui.setconfig() accesses to avoid hitting http://bz.selenic.com/show_bug.cgi?id=3953
+from mercurial.ui import ui
+import thread
+
+config_lock = thread.allocate_lock()
+orig_setconfig = ui.setconfig
+
+def new_setconfig(*args, **kwargs):
+  with config_lock:
+    orig_setconfig(*args, **kwargs)
+
+ui.setconfig = new_setconfig
+
+# The config file looks like this.  You can have paths to individual
+# repos, collections of repos in a directory tree, or both.
+#
+# [paths]
+# virtual/path1 = /real/path1
+# virtual/path2 = /real/path2
+# virtual/root = /real/root/*
+# / = /real/root2/*
+#
+# [collections]
+# /prefix/to/strip/off = /root/of/tree/full/of/repos
+#
+# paths example: 
+#
+# * First two lines mount one repository into one virtual path, like
+# '/real/path1' into 'virtual/path1'.
+#
+# * The third entry tells every mercurial repository found in
+# '/real/root', recursively, should be mounted in 'virtual/root'. This
+# format is preferred over the [collections] one, using absolute paths
+# as configuration keys is not supported on every platform (including
+# Windows).
+#
+# * The last entry is a special case mounting all repositories in
+# '/real/root2' in the root of the virtual directory.
+#
+# collections example: say directory tree /foo contains repos /foo/bar,
+# /foo/quux/baz.  Give this config section:
+#   [collections]
+#   /foo = /foo
+# Then repos will list as bar and quux/baz.
+#
+# Alternatively you can pass a list of ('virtual/path', '/real/path') tuples
+# or use a dictionary with entries like 'virtual/path': '/real/path'
+
+class hgwebdir_with_filter(hgwebdir):
+        def run_wsgi(self, req):
+                req.env['PATH_INFO'] = unquote(req.env.get('PATH_INFO'))
+                result = super(hgwebdir_with_filter, self).run_wsgi(req)
+                request_uri = req.env.get('REQUEST_URI')
+                if request_uri and request_uri.startswith("/subscriptionlist/"):
+                        return self.do_filter(result, req)
+                else:
+                        return result
+
+        def do_filter(self, iter, req):
+                for chunk in iter:
+                        yield re.sub(r'\bemail=.*?([\r\n]|$)', r'email=xxxx\1', chunk)
+                if hasattr(iter, 'close'):
+                        iter.close()
+
+WSGIServer(hgwebdir_with_filter('/etc/hgweb.ini'), debug=False).run()