web_server_root documentation fix

Signed-off-by: Matthew Wolff <matthewjwolff@gmail.com>

README.rst

@@ -335,8 +335,11 @@ ArchLinux
 ---------
 
 The quickest way to get up and running with ArchLinux is probably with the community package
-https://www.archlinux.org/packages/community/any/matrix-synapse/, which should pull in all
-the necessary dependencies.
+https://www.archlinux.org/packages/community/any/matrix-synapse/, which should pull in most of
+the necessary dependencies. If the default web client is to be served (enabled by default in
+the generated config),
+https://www.archlinux.org/packages/community/any/python2-matrix-angular-sdk/ will also need to
+be installed. 
 
 Alternatively, to install using pip a few changes may be needed as ArchLinux
 defaults to python 3, but synapse currently assumes python 2.7 by default:

synapse/app/homeserver.py

@@ -88,11 +88,10 @@ def build_resource_for_web_client(hs):
                 "the location of the source to serve via the configuration\n"
                 "option `web_client_location`\n\n"
                 "To install the `matrix-angular-sdk` via pip, run:\n\n"
-                "    pip install '%(dep)s'\n"
+                "    pip install matrix-angular-sdk\n"
                 "\n"
                 "You can also disable hosting of the webclient via the\n"
                 "configuration option `web_client`\n"
-                % {"dep": DEPENDENCY_LINKS["matrix-angular-sdk"]}
             )
         syweb_path = os.path.dirname(syweb.__file__)
         webclient_path = os.path.join(syweb_path, "webclient")

synapse/config/server.py

@@ -144,6 +144,12 @@ class ServerConfig(Config):
         # Whether to serve a web client from the HTTP/HTTPS root resource.
         web_client: True
 
+        # The root directory to server for the above web client.
+        # If left undefined, synapse will serve the matrix-angular-sdk web client.
+        # Make sure matrix-angular-sdk is installed with pip if web_client is True
+        # and web_client_location is undefined
+        # web_client_location: "/path/to/web/root"
+
         # The public-facing base URL for the client API (not including _matrix/...)
         # public_baseurl: https://example.com:8448/