Windows,tests: port experimental_ui_test

//src/test/shell/integration:experimental_ui_test
now runs on Windows.

See https://github.com/bazelbuild/bazel/issues/4292

Change-Id: I7997e8a2e8dce9377c0326b9ed3f6c55a09b2708

Closes #5690.

Change-Id: I7997e8a2e8dce9377c0326b9ed3f6c55a09b2708
PiperOrigin-RevId: 206535860

src/test/shell/integration/BUILD

diff --git a/src/test/shell/integration/BUILD b/src/test/shell/integration/BUILD
index 9dc0aae..87ba005 100644
--- a/src/test/shell/integration/BUILD
+++ b/src/test/shell/integration/BUILD
@@ -83,9 +83,11 @@
     name = "experimental_ui_test",
     size = "large",
     srcs = ["experimental_ui_test.sh"],
-    data = [":test-deps"],
-    shard_count = 11,
-    tags = ["no_windows"],
+    data = [
+        ":test-deps",
+        "@bazel_tools//tools/bash/runfiles",
+    ],
+    shard_count = 4,
 )
 
 sh_test(

src/test/shell/integration/experimental_ui_test.sh

diff --git a/src/test/shell/integration/experimental_ui_test.sh b/src/test/shell/integration/experimental_ui_test.sh
index be37b45..3b203a2 100755
--- a/src/test/shell/integration/experimental_ui_test.sh
+++ b/src/test/shell/integration/experimental_ui_test.sh
@@ -16,19 +16,57 @@
 #
 # An end-to-end test that Bazel's experimental UI produces reasonable output.
 
-# Load the test setup defined in the parent directory
-CURRENT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-source "${CURRENT_DIR}/../integration_test_setup.sh" \
+# --- begin runfiles.bash initialization ---
+set -euo pipefail
+if [[ ! -d "${RUNFILES_DIR:-/dev/null}" && ! -f "${RUNFILES_MANIFEST_FILE:-/dev/null}" ]]; then
+  if [[ -f "$0.runfiles_manifest" ]]; then
+    export RUNFILES_MANIFEST_FILE="$0.runfiles_manifest"
+  elif [[ -f "$0.runfiles/MANIFEST" ]]; then
+    export RUNFILES_MANIFEST_FILE="$0.runfiles/MANIFEST"
+  elif [[ -f "$0.runfiles/bazel_tools/tools/bash/runfiles/runfiles.bash" ]]; then
+    export RUNFILES_DIR="$0.runfiles"
+  fi
+fi
+if [[ -f "${RUNFILES_DIR:-/dev/null}/bazel_tools/tools/bash/runfiles/runfiles.bash" ]]; then
+  source "${RUNFILES_DIR}/bazel_tools/tools/bash/runfiles/runfiles.bash"
+elif [[ -f "${RUNFILES_MANIFEST_FILE:-/dev/null}" ]]; then
+  source "$(grep -m1 "^bazel_tools/tools/bash/runfiles/runfiles.bash " \
+            "$RUNFILES_MANIFEST_FILE" | cut -d ' ' -f 2-)"
+else
+  echo >&2 "ERROR: cannot find @bazel_tools//tools/bash/runfiles:runfiles.bash"
+  exit 1
+fi
+# --- end runfiles.bash initialization ---
+
+source "$(rlocation "io_bazel/src/test/shell/integration_test_setup.sh")" \
   || { echo "integration_test_setup.sh not found!" >&2; exit 1; }
 
-#### SETUP #############################################################
+case "$(uname -s | tr [:upper:] [:lower:])" in
+msys*|mingw*|cygwin*)
+  declare -r is_windows=true
+  ;;
+*)
+  declare -r is_windows=false
+  ;;
+esac
 
-set -e
+if "$is_windows"; then
+  export MSYS_NO_PATHCONV=1
+  export MSYS2_ARG_CONV_EXCL="*"
+fi
+
+#### SETUP #############################################################
 
 add_to_bazelrc "build --genrule_strategy=local"
 add_to_bazelrc "test --test_strategy=standalone"
 
 function set_up() {
+  if [[ -d pkg ]]; then
+    # All tests share these scratch packages. No need to recreate them if they
+    # already exist.
+    return
+  fi
+
   mkdir -p pkg
   touch remote_file
   cat > pkg/true.sh <<EOF
@@ -108,6 +146,7 @@
   deps = [":outputlib"],
 )
 EOF
+  chmod -w pkg/*  # prevent accidental editing
 }
 
 #### TESTS #############################################################