Add absolute path handling to Rlocation implementation used for remote execution on Windows from Java launcher.

Previously the test case would fail because it tried to run a path like this:

C:/temp/build-1dad9dd4-ee96-40c5-b551-c8ae12461e45/bazel-out/x64_windows-fastbuild/bin/foo/foo_test.exe.runfiles/C:/openjdk/bin/java.exe

Passing presubmit: https://buildkite.com/bazel/google-bazel-presubmit/builds/2558#b83dbc25-d9ad-4d49-8f78-cde9d6810741

RELNOTES: N/A
PiperOrigin-RevId: 195675424

2 files changed, 6 insertions, 0 deletions

diff --git a/src/tools/launcher/BUILD b/src/tools/launcher/BUILD
index 14d420d909..37b0e4dddc 100644
--- a/src/tools/launcher/BUILD
+++ b/src/tools/launcher/BUILD
@@ -28,6 +28,7 @@ cc_library(
     srcs = ["launcher.cc"],
     hdrs = ["launcher.h"],
     deps = [
+        "//src/main/cpp/util:file",
         "//src/tools/launcher/util",
         "//src/tools/launcher/util:data_parser",
     ],
diff --git a/src/tools/launcher/launcher.cc b/src/tools/launcher/launcher.cc
index 515733814f..ea58e2cb75 100644
--- a/src/tools/launcher/launcher.cc
+++ b/src/tools/launcher/launcher.cc
@@ -20,6 +20,7 @@
 #include <string>
 #include <vector>
 
+#include "src/main/cpp/util/file_platform.h"
 #include "src/tools/launcher/launcher.h"
 #include "src/tools/launcher/util/data_parser.h"
 #include "src/tools/launcher/util/launcher_util.h"
@@ -138,6 +139,10 @@ string BinaryLauncherBase::Rlocation(const string& path,
   // If the manifest file map is empty, then we're using the runfiles directory
   // instead.
   if (manifest_file_map.empty()) {
+    if (blaze_util::IsAbsolute(path)) {
+      return path;
+    }
+
     string query_path = runfiles_dir;
     if (need_workspace_name) {
       query_path += "/" + this->workspace_name;