resolve release promotion unrelated-history conflicts by taking source side

src/apps/apps.service.ts

@@ -724,16 +724,7 @@ export class AppsService {
                 commitSha,
               ], { cwd: workDir });
             } catch {
-              await execFileAsync(gitBin, [
-                ...mergeOptions,
-                'merge',
-                '--allow-unrelated-histories',
-                '--no-ff',
-                '--no-edit',
-                '-X',
-                'theirs',
-                commitSha,
-              ], { cwd: workDir });
+              await this.resolveReleaseMergeByTakingSourceOnConflict(gitBin, workDir, mergeOptions, commitSha, repository);
             }
           }
         } else {
@@ -759,6 +750,27 @@ export class AppsService {
     }
   }
 
+  private async resolveReleaseMergeByTakingSourceOnConflict(
+    gitBin: string,
+    workDir: string,
+    mergeOptions: string[],
+    commitSha: string,
+    repository: string,
+  ) {
+    await execFileAsync(gitBin, [
+      ...mergeOptions,
+      'merge',
+      '--allow-unrelated-histories',
+      '--no-ff',
+      '--no-edit',
+      '--no-commit',
+      commitSha,
+    ], { cwd: workDir });
+    await execFileAsync(gitBin, ['checkout', '--theirs', '.'], { cwd: workDir });
+    await execFileAsync(gitBin, ['add', '-A'], { cwd: workDir });
+    await execFileAsync(gitBin, ['commit', '--allow-empty', '-m', `${repository} release promotion merge`], { cwd: workDir });
+  }
+
   private getHttpCloneUrl(repository: string) {
     return `${this.configService
       .get<string>('GITEA_BASE_URL', 'http://localhost:3000')