must use `||` and not `??` when falling back to commit when ref is not provided.

Signed-off-by: James Bradlee <james.bradlee@telenor.no>

__test__/input-helper.test.ts

@@ -163,10 +163,8 @@ describe('input-helper tests', () => {
     inputs.commit = '0123456789012345678901234567890123456789'
     const settings: IGitSourceSettings = await inputHelper.getInputs()
     expect(settings).toBeTruthy()
-    expect(settings.ref).toBeTruthy()
-    expect(settings.ref).toStrictEqual(
-      '0123456789012345678901234567890123456789'
-    )
+    expect(settings.ref).toBeFalsy()
+    expect(settings.ref).toStrictEqual('')
     expect(settings.commit).toBeTruthy()
     expect(settings.commit).toStrictEqual(
       '0123456789012345678901234567890123456789'

dist/index.js

@@ -1717,7 +1717,6 @@ const path = __importStar(__nccwpck_require__(1017));
 const workflowContextHelper = __importStar(__nccwpck_require__(9568));
 function getInputs() {
     return __awaiter(this, void 0, void 0, function* () {
-        var _a;
         const result = {};
         // GitHub workspace
         let githubWorkspacePath = process.env['GITHUB_WORKSPACE'];
@@ -1753,7 +1752,7 @@ function getInputs() {
         if (result.commit && !result.commit.match(/^[0-9a-fA-F]{40}$/)) {
             throw new Error(`The commit SHA '${result.commit}' is not a valid SHA.`);
         }
-        result.ref = (_a = core.getInput('ref')) !== null && _a !== void 0 ? _a : result.commit;
+        result.ref = core.getInput('ref') || result.commit;
         if (!result.ref) {
             if (isWorkflowRepository) {
                 result.ref = github.context.ref;

src/input-helper.ts

@@ -62,7 +62,7 @@ export async function getInputs(): Promise<IGitSourceSettings> {
     throw new Error(`The commit SHA '${result.commit}' is not a valid SHA.`)
   }
 
-  result.ref = core.getInput('ref') ?? result.commit
+  result.ref = core.getInput('ref') || result.commit
   if (!result.ref) {
     if (isWorkflowRepository) {
       result.ref = github.context.ref