[torque] Adds strip-v8-root flag

Change-Id: I116a25fe586491f1a3aff6a486e69724d82115ac
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2983207
Auto-Submit: Victor Gomes <victorgomes@chromium.org>
Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75381}

src/torque/torque-compiler.h

@@ -33,6 +33,9 @@ struct TorqueCompilerOptions {
 
   // Adds extra comments in output that show Torque intermediate representation.
   bool annotate_ir = false;
+
+  // Strips the v8-root in case the source path contains it as a prefix.
+  bool strip_v8_root = false;
 };
 
 struct TorqueCompilerResult {

src/torque/torque.cc

@@ -27,7 +27,7 @@ int WrappedMain(int argc, const char** argv) {
 
   for (int i = 1; i < argc; ++i) {
     // Check for options
-    const std::string argument(argv[i]);
+    std::string argument(argv[i]);
     if (argument == "-o") {
       options.output_directory = argv[++i];
     } else if (argument == "-v8-root") {
@@ -41,7 +41,15 @@ int WrappedMain(int argc, const char** argv) {
 #endif
     } else if (argument == "-annotate-ir") {
       options.annotate_ir = true;
+    } else if (argument == "-strip-v8-root") {
+      options.strip_v8_root = true;
     } else {
+      // Strip the v8-root in case it is a prefix of the file path itself.
+      // This is used when building in Google3.
+      if (options.strip_v8_root &&
+          argument.substr(0, options.v8_root.size()) == options.v8_root) {
+        argument = argument.substr(options.v8_root.size() + 1);
+      }
       // Otherwise it's a .tq file. Remember it for compilation.
       files.emplace_back(std::move(argument));
       if (!StringEndsWith(files.back(), ".tq")) {