add support of environtment variable for tab & group

packages/node_modules/@node-red/util/lib/util.js

@@ -515,18 +515,83 @@ function setObjectProperty(msg,prop,value,createMissing) {
     return true;
 }
 
+/*!
+ * Get value of environment variable defined in group node.
+ * @param {String} group - group node
+ * @param {String} name - name of variable
+ * @return {Object} object containing the value in val property or null if not defined
+ */
+function getGroupSetting(node, group, flow, name) {
+    if (group) {
+        if (!name.startsWith("$parent.")) {
+            if (group.env) {
+                if (!group._env) {
+                    const envs = group.env;
+                    const entries = envs.map((env) => [env.name, env]);
+                    group._env = Object.fromEntries(entries);
+                }
+                const env = group._env[name];
+                if (env) {
+                    let value = env.value;
+                    const type = env.type;
+                    if ((type !== "env") || (value !== name)) {
+                        if (type === "env") {
+                            value = value.replace(new RegExp("\\${"+name+"}","g"),"${$parent."+name+"}");
+                        }
+                        try {
+                            if (type === "bool") {
+                                const val = ((value === "true") ||
+                                             (value === true));
+                                return {
+                                    val: val
+                                };
+                            }
+                            if (type === "cred") {
+                                return {
+                                    val: value
+                                };
+                            }
+                            var val = evaluateNodeProperty(value, type, node, null, null);
+                            return {
+                                val: val
+                            };
+                        }
+                        catch (e) {
+                            this.error(e);
+                            return null;
+                        }
+                    }
+                }
+            }
+        }
+        else {
+            name = name.substring(8);
+        }
+        if (group.g && flow) {
+            const parent = flow.getGroupNode(group.g);
+            return getGroupSetting(node, parent, flow, name);
+        }
+    }
+    return null;
+}
+
 /*!
  * Get value of environment variable.
  * @param {Node} node - accessing node
  * @param {String} name - name of variable
  * @return {String} value of env var
  */
-function getSetting(node, name) {
-    if (node && node._flow) {
-        var flow = node._flow;
-        if (flow) {
-            return flow.getSetting(name);
+function getSetting(node, name, flow_) {
+    var flow = (flow_ ? flow_ : (node ? node._flow : null));
+    if (flow) {
+        if (node && node.g) {
+            const group = flow.getGroupNode(node.g);
+            const result = getGroupSetting(node, group, flow, name);
+            if (result) {
+                return result.val;
+            }
         }
+        return flow.getSetting(name);
     }
     return process.env[name];
 }
@@ -544,18 +609,19 @@ function getSetting(node, name) {
  * @memberof @node-red/util_util
  */
 function evaluateEnvProperty(value, node) {
+    var flow = (node && node.hasOwnProperty("_flow")) ? node._flow : null;
     var result;
     if (/^\${[^}]+}$/.test(value)) {
         // ${ENV_VAR}
         var name = value.substring(2,value.length-1);
-        result = getSetting(node, name);
+        result = getSetting(node, name, flow);
     } else if (!/\${\S+}/.test(value)) {
         // ENV_VAR
-        result = getSetting(node, value);
+        result = getSetting(node, value, flow);
     } else {
         // FOO${ENV_VAR}BAR
         return value.replace(/\${([^}]+)}/g, function(match, name) {
-            var val = getSetting(node, name);
+            var val = getSetting(node, name, flow);
             return (val === undefined)?"":val;
         });
     }
@@ -668,7 +734,7 @@ function prepareJSONataExpression(value,node) {
         return node.context().global.get(val, store);
     });
     expr.assign('env', function(name) {
-        var val = getSetting(node, name);
+        var val = getSetting(node, name, node._flow);
         if (typeof val !== 'undefined') {
             return val;
         } else {
@@ -976,5 +1042,6 @@ module.exports = {
     normaliseNodeTypeName: normaliseNodeTypeName,
     prepareJSONataExpression: prepareJSONataExpression,
     evaluateJSONataExpression: evaluateJSONataExpression,
-    parseContextStore: parseContextStore
+    parseContextStore: parseContextStore,
+    getSetting: getSetting
 };