Wire up the webclient option

It existed but was hardcoded to True.
Give it an underscore for consistency.
Also don't pull in syweb unless we're actually using the web client.

synapse/app/homeserver.py

@@ -60,7 +60,6 @@ import re
 import resource
 import subprocess
 import sqlite3
-import syweb
 
 logger = logging.getLogger(__name__)
 
@@ -83,6 +82,7 @@ class SynapseHomeServer(HomeServer):
         return AppServiceRestResource(self)
 
     def build_resource_for_web_client(self):
+        import syweb
         syweb_path = os.path.dirname(syweb.__file__)
         webclient_path = os.path.join(syweb_path, "webclient")
         return File(webclient_path)  # TODO configurable?
@@ -130,7 +130,7 @@ class SynapseHomeServer(HomeServer):
             True.
         """
         config = self.get_config()
-        web_client = config.webclient
+        web_client = config.web_client
 
         # list containing (path_str, Resource) e.g:
         # [ ("/aaa/bbb/cc", Resource1), ("/aaa/dummy", Resource2) ]
@@ -343,7 +343,8 @@ def setup(config_options):
 
     config.setup_logging()
 
-    check_requirements()
+    # check any extra requirements we have now we have a config
+    check_requirements(config)
 
     version_string = get_version_string()
 
@@ -450,6 +451,7 @@ def run(hs):
 
 def main():
     with LoggingContext("main"):
+        # check base requirements
         check_requirements()
         hs = setup(sys.argv[1:])
         run(hs)

synapse/config/server.py

@@ -28,7 +28,7 @@ class ServerConfig(Config):
         self.unsecure_port = args.unsecure_port
         self.daemonize = args.daemonize
         self.pid_file = self.abspath(args.pid_file)
-        self.webclient = True
+        self.web_client = args.web_client
         self.manhole = args.manhole
         self.soft_file_limit = args.soft_file_limit
 
@@ -68,6 +68,8 @@ class ServerConfig(Config):
         server_group.add_argument('--pid-file', default="homeserver.pid",
                                   help="When running as a daemon, the file to"
                                   " store the pid in")
+        server_group.add_argument('--web_client', default=True, type=bool,
+                                  help="Whether or not to serve a web client")
         server_group.add_argument("--manhole", metavar="PORT", dest="manhole",
                                   type=int,
                                   help="Turn on the twisted telnet manhole"

synapse/python_dependencies.py

@@ -5,7 +5,6 @@ logger = logging.getLogger(__name__)
 
 REQUIREMENTS = {
     "syutil>=0.0.3": ["syutil"],
-    "matrix_angular_sdk>=0.6.5": ["syweb>=0.6.5"],
     "Twisted==14.0.2": ["twisted==14.0.2"],
     "service_identity>=1.0.0": ["service_identity>=1.0.0"],
     "pyopenssl>=0.14": ["OpenSSL>=0.14"],
@@ -18,6 +17,19 @@ REQUIREMENTS = {
     "pillow": ["PIL"],
     "pydenticon": ["pydenticon"],
 }
+CONDITIONAL_REQUIREMENTS = {
+    "web_client": {
+        "matrix_angular_sdk>=0.6.5": ["syweb>=0.6.5"],
+    }
+}
+
+
+def requirements(config=None, include_conditional=False):
+    reqs = REQUIREMENTS.copy()
+    for key,req in CONDITIONAL_REQUIREMENTS.items():
+        if (config and getattr(config, key)) or include_conditional:
+            reqs.update(req)
+    return reqs
 
 
 def github_link(project, version, egg):
@@ -46,10 +58,10 @@ class MissingRequirementError(Exception):
     pass
 
 
-def check_requirements():
+def check_requirements(config=None):
     """Checks that all the modules needed by synapse have been correctly
     installed and are at the correct version"""
-    for dependency, module_requirements in REQUIREMENTS.items():
+    for dependency, module_requirements in requirements(config, include_conditional=False).items():
         for module_requirement in module_requirements:
             if ">=" in module_requirement:
                 module_name, required_version = module_requirement.split(">=")
@@ -110,7 +122,7 @@ def list_requirements():
         egg = link.split("#egg=")[1]
         linked.append(egg.split('-')[0])
         result.append(link)
-    for requirement in REQUIREMENTS:
+    for requirement in requirements(include_conditional=True):
         is_linked = False
         for link in linked:
             if requirement.replace('-', '_').startswith(link):