[__jitsi_meet_domain] Support the --state parameter

This enables removing domains in a simple fashion.

Closes #3.

type/__jitsi_meet_domain/man.rst

@@ -60,6 +60,10 @@ start-video-muted
     Defaults to 10.
 
 
+state
+    Whether the domain is 'present' or 'absent', defaults to 'present'.
+
+
 turn-server
     The TURN server to be used.
     Defaults to `__target_host`.

type/__jitsi_meet_domain/manifest

@@ -21,6 +21,7 @@ VIDEO_CONSTRAINTS="$(cat "${__object}/parameter/video-constraints")"
 BRANDING_INDEX="$(cat "${__object}/parameter/branding-index")"
 BRANDING_JSON="$(cat "${__object}/parameter/branding-json")"
 BRANDING_WATERMARK="$(cat "${__object}/parameter/branding-watermark")"
+STATE="$(cat "${__object}/parameter/state")"
 
 if [ "${BRANDING_INDEX}" = "-" ]; then
 	BRANDING_INDEX="${__object}/stdin"
@@ -47,11 +48,31 @@ if [ -n "${BRANDING_JSON}" ]; then
 	DYNAMIC_BRANDING_URL="/branding.json"
 fi
 
+case "${STATE}" in
+	present)
+		# When adding the domain, Let's Encrypt must come before nginx
+		le_require=""
+		nginx_require="__letsencrypt_cert/${DOMAIN}"
+		;;
+	absent)
+		# When removing, nginx must come before Let's Encrypt
+		le_require="__file/etc/nginx/sites-enabled/${DOMAIN}.conf"
+		nginx_require=""
+		;;
+	*)
+		cat >> /dev/stderr <<-EOM
+		Unsupported state '${STATE}', must be 'present' or 'absent'.
+		EOM
+		exit 1
+		;;
+esac
+
 #
 # Deal with certbot
 #
 # use object id as domain
-__letsencrypt_cert "${DOMAIN}" \
+require="${le_require}" __letsencrypt_cert "${DOMAIN}" \
+	--state "${STATE}" \
 	--admin-email "${ADMIN_EMAIL}" \
 	--deploy-hook "service nginx reload" \
 	--webroot /usr/share/jitsi-meet
@@ -59,8 +80,9 @@ __letsencrypt_cert "${DOMAIN}" \
 # Create virtualhost for nginx
 # shellcheck source=type/__jitsi_meet_domain/files/nginx.sh
 . "${__type}/files/nginx.sh"  # This defines JITSI_NGINX_CONFIG
-require="__letsencrypt_cert/${DOMAIN}" __file \
+require="${nginx_require}" __file \
 	"/etc/nginx/sites-enabled/${DOMAIN}.conf" \
+	--state "${STATE}" \
 	--mode 0644 --source "-" <<EOF
 ${JITSI_NGINX_CONFIG}
 EOF
@@ -69,6 +91,7 @@ EOF
 # shellcheck source=type/__jitsi_meet_domain/files/config.js.sh
 . "${__type}/files/config.js.sh"  # This defines JITSI_CONFIG_JS
 __file "/etc/jitsi/meet/${DOMAIN}-config.js" \
+	--state "${STATE}" \
 	--mode 0644 --source "-" <<EOF
 ${JITSI_CONFIG_JS}
 EOF
@@ -77,6 +100,7 @@ EOF
 # shellcheck source=type/__jitsi_meet_domain/files/interface_config.js.sh
 . "${__type}/files/interface_config.js.sh"  # This defines JITSI_CONFIG_JS
 __file "/etc/jitsi/meet/${DOMAIN}-interface_config.js" \
+	--state "${STATE}" \
 	--mode 0644 --source "-" <<EOF
 ${JITSI_INTERFACE_CONFIG_JS}
 EOF
@@ -87,7 +111,7 @@ EOF
 #
 # Helper function to manage the state of the target branding file
 _var_state() {
-	if [ -n "${1}" ]; then
+	if [ "${STATE}" = "present" ] && [ -n "${1}" ]; then
 		echo "present"
 	else
 		echo "absent"

type/__jitsi_meet_domain/parameter/default/state

@@ -0,0 +1 @@
+present

type/__jitsi_meet_domain/parameter/optional

@@ -7,3 +7,4 @@ video-constraints
 branding-json
 branding-index
 branding-watermark
+state