fix for strange states

Author: yaacovCR

resources/gen-changelog.ts

@@ -65,7 +65,10 @@ async function genChangeLog(): Promise<string> {
   } catch {
     const parentPackageJSON = git().catFile('blob', 'HEAD~1:package.json');
     const parentVersion = JSON.parse(parentPackageJSON).version;
-    commitsList = git().revList('--reverse', `v${parentVersion}..HEAD~1`);
+    const parentTag = `v${parentVersion}`;
+    commitsList = git().mergeBaseIsAncestor(parentTag, 'HEAD~1')
+      ? git().revList('--reverse', `${parentTag}..HEAD~1`)
+      : [];
     tag = releaseTag;
   }
 

resources/utils.ts

@@ -108,6 +108,17 @@ export function git(options?: GITOptions) {
       const result = spawnOutput('git', allArgs, options);
       return result === '' ? [] : result.split('\n');
     },
+    mergeBaseIsAncestor(ancestor: string, descendant: string): boolean {
+      const result = childProcess.spawnSync(
+        'git',
+        ['merge-base', '--is-ancestor', ancestor, descendant],
+        {
+          stdio: 'ignore',
+          ...options,
+        },
+      );
+      return result.status === 0;
+    },
     catFile(...args: ReadonlyArray<string>): string {
       return spawnOutput('git', ['cat-file', ...cmdOptions, ...args], options);
     },