fix just the issue at hand

Mivr · Mivr · commit 63f4123fb47e · 2025-08-18T19:44:31.000+03:00
diff --git a/packages/runfiles/runfiles.ts b/packages/runfiles/runfiles.ts
@@ -144,73 +144,24 @@ export class Runfiles {
     const repoMappings: RepoMappings = Object.create(null);
     const mappings = fs.readFileSync(repoMappingPath, { encoding: "utf-8" });
 
+    // Each line of the repository mapping manifest has the form:
+    // canonical name of source repo,apparent name of target repo,target repo runfiles directory
+    // https://cs.opensource.google/bazel/bazel/+/1b073ac0a719a09c9b2d1a52680517ab22dc971e:src/main/java/com/google/devtools/build/lib/analysis/RepoMappingManifestAction.java;l=117
     for (const line of mappings.split("\n")) {
       if (!line) continue;
 
-      try {
-        const parsed = this.parseBzlmodRepoMappingLine(line) || this.parseLegacyRepoMappingLine(line);
-        
-        if (parsed) {
-          const { sourceRepo, targetRepoApparentName, targetRepoDirectory } = parsed;
-          (repoMappings[sourceRepo] ??= Object.create(null))[targetRepoApparentName] = targetRepoDirectory;
-        }
-      } catch (error) {
-        console.warn(`Failed to parse repo mapping line: "${line}"`);
-      }
-    }
-    return repoMappings;
-  }
+      const [sourceRepo, targetRepoApparentName, targetRepoDirectory] = line.split(",");
 
-  private parseBzlmodRepoMappingLine(line: string): {
-    sourceRepo: string;
-    targetRepoApparentName: string;
-    targetRepoDirectory: string;
-  } | null {
-    const trimmedLine = line.trim();
-    if (!trimmedLine || trimmedLine.startsWith('#')) {
-      return null;
+      (repoMappings[sourceRepo] ??= Object.create(null))[targetRepoApparentName] = targetRepoDirectory;
     }
-
-    const parts = trimmedLine.split(',');
-    if (parts.length < 3) {
-      return null;
-    }
-
-    const [sourceRepo, targetRepoApparentName, targetRepoDirectory] = parts;
     
-    if (!sourceRepo.trim() || !targetRepoApparentName.trim() || !targetRepoDirectory.trim()) {
-      return null;
+    // Ensure empty source repository mapping exists
+    if (!repoMappings[""]) {
+      repoMappings[""] = Object.create(null);
+      repoMappings[""]["__main__"] = "__main__";
     }
-
-    return {
-      sourceRepo: sourceRepo.trim(),
-      targetRepoApparentName: targetRepoApparentName.trim(),
-      targetRepoDirectory: targetRepoDirectory.trim()
-    };
-  }
-
-  private parseLegacyRepoMappingLine(line: string): {
-    sourceRepo: string;
-    targetRepoApparentName: string;
-    targetRepoDirectory: string;
-  } | null {
-    const trimmedLine = line.trim();
-    if (!trimmedLine) {
-      return null;
-    }
-
-    const parts = trimmedLine.split(',');
-    if (parts.length !== 3) {
-      return null;
-    }
-
-    const [sourceRepo, targetRepoApparentName, targetRepoDirectory] = parts;
-
-    return {
-      sourceRepo,
-      targetRepoApparentName,
-      targetRepoDirectory
-    };
+    
+    return repoMappings;
   }
 
   /** Resolves the given module path. */
