feat: If a default value is given, readConfigValue ignores required

This allows the `required` setting to be conditional upon whether a default value has already been supplied by preceding code

src/config/__tests__/readConfigValue.unit.test.ts

@@ -64,6 +64,19 @@ describe('readConfigValue(', () => {
     }).toThrow();
   });
 
+  it('if a default value is provided, the `required` option should be ignored', () => {
+    expect.assertions(2);
+    const options = { filepaths: tmpFilepaths };
+
+    expect(() => {
+      const valueOptions = { defaultValue: 0, required: true };
+
+      const value = readConfigValue(options, 'nonexistent-objectPath', valueOptions);
+
+      expect(value).toBe(0);
+    }).not.toThrow();
+  });
+
   it("if a config file isn't found, should skip it", () => {
     const defaultValue = 0;
     const options = {

src/config/readConfigValue.ts

@@ -46,7 +46,7 @@ export function readConfigValue<T>(
   }
 
   const { defaultValue, exitOnError, quiet, required } = options;
-  if (required) {
+  if (required && defaultValue === undefined) {
     const errorMsg = 'Error!';
     if (exitOnError) {
       if (!quiet) {