v3.4.0

=====================================================================

--- Changes ------------------------------

- Allow the group variable `REQUIRED_ENVIRONMENT_REGEX` to enforce that
  only some environments can run within the group

run

@@ -208,6 +208,12 @@ __RUN() {
 	##########################################
 
 	local ENV_REQUIRED=$(__CHECK_ENV_REQUIRED && echo 1 || echo 0)
+	local REQUIRED_ENVIRONMENT_REGEX=$(eval echo '$SCWRYPTS_REQUIRED_ENVIRONMENT_REGEX__'$SCWRYPT_GROUP)
+
+	[ $REQUIRED_ENVIRONMENT_REGEX ] && {
+		[[ $ENV_NAME =~ $REQUIRED_ENVIRONMENT_REGEX ]] \
+			|| FAIL 5 "group '$SCWRYPT_GROUP' requires current environment to match '$REQUIRED_ENVIRONMENT_REGEX' (currently $ENV_NAME)"
+	}
 
 	[[ $ENV_REQUIRED -eq 1 ]] && {
 		[ ! $ENV_NAME ] && ENV_NAME=$(SCWRYPTS__SELECT_ENV)
@@ -215,15 +221,20 @@ __RUN() {
 		do
 			local ENV_FILE=$(SCWRYPTS__GET_ENV_FILE "$ENV_NAME" "$GROUP")
 			source "$ENV_FILE" || FAIL 5 "missing or invalid environment '$GROUP/$ENV_NAME'"
+
+			for f in $(eval 'echo $SCWRYPTS_STATIC_CONFIG__'$GROUP)
+			do
+				source "$f" || FAIL 5 "invalid static config '$f'"
+			done
 		done
 
 		export ENV_NAME
 	}
 
-	for f in $(eval 'echo $SCWRYPTS_STATIC_CONFIG__'$SCWRYPT_GROUP)
-	do
-		source "$f" || FAIL 5 "invalid static config '$f'"
-	done
+	[ $REQUIRED_ENVIRONMENT_REGEX ] && {
+		[[ $ENV_NAME =~ $REQUIRED_ENVIRONMENT_REGEX ]] \
+			|| FAIL 5 "group '$SCWRYPT_GROUP' requires current environment to match '$REQUIRED_ENVIRONMENT_REGEX' (currently $ENV_NAME)"
+	}
 
 	##########################################
 

zsh/lib/scwrypts/environment-files.module.zsh

@@ -64,7 +64,11 @@ SCWRYPTS__GET_ENV_NAMES() {
 		ERROR 'environment initialization error'
 		return 1
 	}
-	ls "$SCWRYPTS_ENV_PATH/scwrypts" | sort -r
+	[ $REQUIRED_ENVIRONMENT_REGEX ] && {
+		ls "$SCWRYPTS_ENV_PATH/scwrypts" | grep "$REQUIRED_ENVIRONMENT_REGEX" | sort -r
+	} || {
+		ls "$SCWRYPTS_ENV_PATH/scwrypts" | sort -r
+	}
 }
 
 SCWRYPTS__INIT_ENVIRONMENTS() {