feat: added support for nested values

Author: pietrobolcato

action_read_yaml/index.js

@@ -7,6 +7,9 @@
  *
  * The variables are in the format `$(variableName)` and are replaced by their corresponding
  * values in the resolved object. If a variable is not defined, an error will be thrown.
+ *
+ * If the YAML configuration file contains nested values, the output keys will use a dot notation
+ * to represent the hierarchy of the values. See README in the root of the repo for examples.
  */
 
 const core = require("@actions/core");
@@ -20,20 +23,35 @@ const yaml = require("js-yaml");
  * @return {string} The string with all variables replaced
  */
 const replaceVariables = (value, resolved) => {
- let match = value.match(/\$\(([^\)]+)\)/);
+ if (typeof value === "object") {
+ // Recursively replace variables in nested objects
+ const nestedObj = {};
+
+ for (const key in value) {
+ nestedObj[key] = replaceVariables(value[key], resolved);
+ }
 
- while (match !== null) {
- const varName = match[1];
+ return nestedObj;
+ } else if (typeof value === "string") {
+ // Replace variables in string values
+ let match = value.match(/\$\(([^\)]+)\)/);
 
- if (!resolved[varName]) {
- throw new Error(`Variable "${varName}" is not defined`);
+ while (match !== null) {
+ const varName = match[1];
+
+ if (!resolved[varName]) {
+ throw new Error(`Variable "${varName}" is not defined`);
+ }
+
+ value = value.replace(match[0], resolved[varName]);
+ match = value.match(/\$\(([^\)]+)\)/);
  }
 
- value = value.replace(match[0], resolved[varName]);
- match = value.match(/\$\(([^\)]+)\)/);
+ return value;
+ } else {
+ // Non-string, non-object values are returned as-is
+ return value;
  }
-
- return value;
 };
 
 /**
@@ -55,10 +73,17 @@ async function main() {
  const configYaml = yaml.load(data, { schema: SCHEMA });
  const resolved = {};
 
- // Resolve variables for each field in the config
- for (const key in configYaml) {
- resolved[key] = replaceVariables(configYaml[key], resolved);
- }
+ const resolveFields = (obj, prefix = "") => {
+ for (const [key, value] of Object.entries(obj)) {
+ if (typeof value === "object" && value !== null) {
+ resolveFields(value, prefix + key + ".");
+ } else {
+ resolved[prefix + key] = replaceVariables(value, resolved);
+ }
+ }
+ };
+
+ resolveFields(configYaml);
 
  Object.entries(resolved).map((val) => {
  const key = val[0];