From f80bacb50c30995a0688f77f2ce6cd72fcb60aef Mon Sep 17 00:00:00 2001
From: Tiago Costa <tiagoffcc@hotmail.com>
Date: Wed, 16 Feb 2022 20:22:36 +0000
Subject: [PATCH] fix(runfiles): use normalized paths when guarding runfiles
 root and node_modules on Windows

---
 internal/node/launcher.sh | 32 +++++++++++++++++++++++++++++++-
 1 file changed, 31 insertions(+), 1 deletion(-)

diff --git a/internal/node/launcher.sh b/internal/node/launcher.sh
index 4f0a7d01c6..bff693097c 100644
--- a/internal/node/launcher.sh
+++ b/internal/node/launcher.sh
@@ -13,6 +13,34 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# It helps to normalizes paths when running on Windows.
+
+# Example:
+# C:/Users/XUser/_bazel_XUser/7q7kkv32/execroot/A/b/C -> /c/users/xuser/_bazel_xuser/7q7kkv32/execroot/a/b/c
+function normalizeWindowsPath {
+  # Determine if we are running on a Windows environment
+  # that can generate problematic paths (excludes WSL as it acts like unix)
+  case "$(uname -s)" in
+      CYGWIN*)    local IS_WINDOWS=true ;;
+      MINGW*)     local IS_WINDOWS=true ;;
+      MSYS_NT*)   local IS_WINDOWS=true ;;
+      *)          local IS_WINDOWS=false ;;
+  esac
+
+  # In case we are running on Windows apply the paths transformations
+  # -process driver letter
+  # -convert path separator
+  # -lowercase everything
+  if $IS_WINDOWS ; then
+    local retval=$(sed -e 's#^\(.\):#/\L\1#' -e 's#\\#/#g' -e 's/[A-Z]/\L&/g' <<< "$1")
+    echo "$retval"
+    return
+  fi
+
+  # otherwise doesnt change the given path and just return the argument as is
+  echo "$1"
+}
+
 # --- begin runfiles.bash initialization v2 ---
 # Copy-pasted from the Bazel Bash runfiles library v2.
 set -uo pipefail; f=build_bazel_rules_nodejs/third_party/github.com/bazelbuild/bazel/tools/bash/runfiles/runfiles.bash
@@ -49,7 +77,9 @@ source "${RUNFILES_DIR:-/dev/null}/$f" 2>/dev/null || \
 # Case 6a is handled like case 3.
 if [[ -n "${RUNFILES_MANIFEST_ONLY:-}" ]]; then
   # Windows only has a manifest file instead of symlinks.
-  RUNFILES=${RUNFILES_MANIFEST_FILE%/MANIFEST}
+  # Normalizing the path and case insensitive removing the `/MANIFEST` part of the path
+  NORMALIZED_RUNFILES_MANIFEST_FILE_PATH=$(normalizeWindowsPath $RUNFILES_MANIFEST_FILE)
+  RUNFILES=$(sed 's|\/MANIFEST$||i' <<< $NORMALIZED_RUNFILES_MANIFEST_FILE_PATH)
 elif [[ -n "${TEST_SRCDIR:-}" ]]; then
   # Case 4, bazel has identified runfiles for us.
   RUNFILES="${TEST_SRCDIR:-}"