resolve release promotion unrelated-history conflicts by taking source side

src/apps/apps.service.ts

@@ -702,6 +702,7 @@ export class AppsService {
             targetBranch,
             `origin/${targetBranch}`,
           ], { cwd: workDir });
+          await this.resetPromotionWorktree(gitBin, workDir);
           try {
             await execFileAsync(gitBin, [
               ...mergeOptions,
@@ -715,6 +716,7 @@ export class AppsService {
               throw error;
             }
             try {
+              await this.resetPromotionWorktree(gitBin, workDir);
               await execFileAsync(gitBin, [
                 ...mergeOptions,
                 'merge',
@@ -757,6 +759,7 @@ export class AppsService {
     commitSha: string,
     repository: string,
   ) {
+    await this.resetPromotionWorktree(gitBin, workDir);
     await execFileAsync(gitBin, [
       ...mergeOptions,
       'merge',
@@ -771,6 +774,13 @@ export class AppsService {
     await execFileAsync(gitBin, ['commit', '--allow-empty', '-m', `${repository} release promotion merge`], { cwd: workDir });
   }
 
+  private async resetPromotionWorktree(gitBin: string, workDir: string) {
+    await execFileAsync(gitBin, ['merge', '--abort'], { cwd: workDir }).catch(() => undefined);
+    await execFileAsync(gitBin, ['rebase', '--abort'], { cwd: workDir }).catch(() => undefined);
+    await execFileAsync(gitBin, ['reset', '--hard'], { cwd: workDir }).catch(() => undefined);
+    await execFileAsync(gitBin, ['clean', '-fd'], { cwd: workDir }).catch(() => undefined);
+  }
+
   private getHttpCloneUrl(repository: string) {
     return `${this.configService
       .get<string>('GITEA_BASE_URL', 'http://localhost:3000')