chore: make const for date format

Author: mcdurdin

developer/src/kmc/src/util/getLastGitCommitDate.ts

@@ -1,5 +1,8 @@
 import { execFileSync } from 'child_process';
 
+// RFC3339 pattern, UTC
+export const expectedGitDateFormat = /^\d\d\d\d-\d\d-\d\dT\d\d:\d\d:\d\dZ$/;
+
 /**
  * Returns the date and time of the last commit from git for the passed in path
  * @param path   Path for which to retrieve the last commit message
@@ -37,7 +40,7 @@ export function getLastGitCommitDate(path: string): string {
 
   // We'll only return the result if it walks like a date, swims like a date,
   // and quacks like a date.
-  if (!result.match(/^\d\d\d\d-\d\d-\d\dT\d\d:\d\d:\d\dZ$/)) {
+  if (!result.match(expectedGitDateFormat)) {
     return null;
   }
 

developer/src/kmc/test/test-getLastGitCommitDate.ts

@@ -1,13 +1,13 @@
 import { assert } from 'chai';
 import 'mocha';
 import { makePathToFixture } from './helpers/index.js';
-import { getLastGitCommitDate } from '../src/util/getLastGitCommitDate.js';
+import { expectedGitDateFormat, getLastGitCommitDate } from '../src/util/getLastGitCommitDate.js';
 
 describe('getLastGitCommitDate', function () {
   it('should return a valid date for a folder in this repo', async function() {
     const path = makePathToFixture('.');
     const date = getLastGitCommitDate(path);
-    assert.match(date, /^\d\d\d\d-\d\d-\d\dT\d\d:\d\d:\d\dZ$/);
+    assert.match(date, expectedGitDateFormat);
   });
 
   it('should return null for a folder outside the repo', async function() {