__matrix_synapse: add --sso-template-dir parameter

type/__matrix_synapse/files/homeserver.yaml.sh

@@ -2191,7 +2191,7 @@ sso:
     # You can see the default templates at:
     # https://github.com/matrix-org/synapse/tree/master/synapse/res/templates
     #
-    #template_dir: "res/templates"
+    template_dir: "${SSO_TEMPLATE_DIR:?}"
 
 
 # JSON web token integration. The following settings can be used to make

type/__matrix_synapse/man.rst

@@ -205,6 +205,9 @@ saml2-mapping-provider-extra-settings
   Extra YAML-formatted key/pair values provided as configuration to the SAML2
   mapping provider module (e.g. 'key: value'). Can be specified multiple times.
 
+sso-template-dir
+  Directory used to source SSO-related HTML templates.
+
 extra-setting
   Arbitrary string to be added to the configuration file. Can be specified multiple times.
 

type/__matrix_synapse/manifest

@@ -220,6 +220,9 @@ if [ -f "$__object/parameter/saml2-mapping-provider-extra-config" ]; then
 	export SAML2_MAPPING_PROVIDER_EXTRA_CONFIG
 fi
 
+SSO_TEMPLATE_DIR=$(cat "$__object/parameter/sso-template-dir")
+export SSO_TEMPLATE_DIR
+
 if [ -n "$SAML2_SP_KEY" ] && [ -z "$SAML2_SP_CERT" ]; then
 	echo "--saml2-sp-cert must be set if --saml2-sp-key is provided." >&2
 	exit 1

type/__matrix_synapse/parameter/default/sso-template-dir

@@ -0,0 +1 @@
+res/template

type/__matrix_synapse/parameter/optional

@@ -41,3 +41,4 @@ saml2-sp-key
 saml2-sp-cert
 default-identity-server
 saml2-mapping-provider-module
+sso-template-dir