fix(builtin): fix localWorkspacePath logic

If the manifest has an entry in the output_base but not in the binDir or genDir, we get a wrong path for later resolutions

Fixes bazel-contrib#1087

internal/node/node_loader.js

@@ -108,6 +108,17 @@ function loadRunfilesManifest(manifestPath) {
   const reverseRunfilesManifest = Object.create(null);
   const input = fs.readFileSync(manifestPath, {encoding: 'utf-8'});
 
+  // Determine bin and gen root to convert absolute paths into runfile paths.
+  const binRootIdx = manifestPath.indexOf(BIN_DIR);
+  if (binRootIdx < 0) {
+    throw new Error(`internal error, please file a bug: runfiles manifest is not under ${BIN_DIR}`);
+  }
+  const execRoot = manifestPath.slice(0, binRootIdx - 1);
+  const outputBase =
+      manifestPath.slice(0, binRootIdx - USER_WORKSPACE_NAME.length - '/execroot/'.length);
+  const binRoot = `${execRoot}/${BIN_DIR}/`;
+  const genRoot = `${execRoot}/${GEN_DIR}/`;
+
   // Absolute path that refers to the local workspace path. We need to determine the absolute
   // path to the local workspace because it allows us to support absolute path resolving
   // for runfiles.
@@ -122,9 +133,9 @@ function loadRunfilesManifest(manifestPath) {
     // We don't need to try determining the local workspace path for the current runfile
     // mapping in case we already determined the local workspace path, the current
     // runfile refers to a different workspace, or the current runfile resolves to a file
-    // in the bazel-out directory (bin/genfiles directory).
+    // in the output_base directory.
     if (localWorkspacePath || !runfilesPath.startsWith(USER_WORKSPACE_NAME) ||
-        realPath.includes(BIN_DIR) || realPath.includes(GEN_DIR)) {
+        realPath.startsWith(outputBase)) {
       continue;
     }
 
@@ -140,15 +151,7 @@ function loadRunfilesManifest(manifestPath) {
     localWorkspacePath = realPath.slice(0, -relativeWorkspacePath.length);
   }
 
-  // Determine bin and gen root to convert absolute paths into runfile paths.
-  const binRootIdx = manifestPath.indexOf(BIN_DIR);
-  let binRoot, genRoot;
-  if (binRootIdx !== -1) {
-    const execRoot = manifestPath.slice(0, binRootIdx);
-    binRoot = `${execRoot}${BIN_DIR}/`;
-    genRoot = `${execRoot}${GEN_DIR}/`;
-  }
-
+  log_verbose(`using outputBase ${outputBase}`);
   log_verbose(`using binRoot ${binRoot}`);
   log_verbose(`using genRoot ${genRoot}`);
   log_verbose(`using localWorkspacePath ${localWorkspacePath}`);