Workaround for microsoft/TypeScript#22208

When building outside the Bazel sandbox (in particular, on Windows where the sandbox is not available),
vanilla tsc doesn't support multiple compilation units. See details in that TypeScript bug.

The workaround is to build tsc_wrapped as a single compilation unit.

PiperOrigin-RevId: 187475876

Author: alexeagle

internal/BUILD.bazel

@@ -17,3 +17,63 @@
 package(default_visibility = ["//visibility:public"])
 
 exports_files(["worker_protocol.proto"])
+
+load("//internal:build_defs.bzl", ts_library = "tsc_library")
+load("@build_bazel_rules_nodejs//:defs.bzl", "nodejs_binary", "jasmine_node_test")
+
+# Vanilla typescript compiler: run the tsc.js binary distributed by TypeScript
+nodejs_binary(
+    name = "tsc",
+    node_modules = "@build_bazel_rules_typescript_tsc_wrapped_deps//:node_modules",
+    entry_point = "typescript/lib/tsc.js",
+    visibility = ["//internal:__subpackages__"],
+)
+
+# Build our custom compiler using the vanilla one
+ts_library(
+    name = "tsc_wrapped",
+    srcs = glob([
+      "tsc_wrapped/*.ts",
+      "tsetse/*.ts",
+      "tsetse/rules/*.ts"
+    ], exclude=["**/test_support.ts", "**/*_test.ts"]),
+    module_name = "@bazel/typescript",
+    module_root = "index.d.ts",
+    tsconfig = "//internal:tsc_wrapped/tsconfig.json",
+    visibility = ["//visibility:public"],
+    data = [
+        # Should be @bazel_tools//src/main/protobuf:worker_protocol.proto
+        # see https://github.com/bazelbuild/bazel/issues/3155#issuecomment-308156976
+        ":worker_protocol.proto",
+    ],
+    # Cannot have any deps because it doesn't work with vanilla tsc
+    # Workaround for https://github.com/Microsoft/TypeScript/issues/22208
+    deps = [
+    ],
+)
+
+# Other ts_library rules will use this custom compiler, which calls the
+# TypeScript APIs to act like tsc, but adds capabilities like Bazel workers.
+nodejs_binary(
+    name = "tsc_wrapped_bin",
+    data = [
+        ":tsc_wrapped",
+    ],
+    node_modules = "@build_bazel_rules_typescript_tsc_wrapped_deps//:node_modules",
+    entry_point = "build_bazel_rules_typescript/internal/tsc_wrapped/tsc_wrapped.js",
+    templated_args = ["--node_options=--expose-gc"],
+    visibility = ["//visibility:public"],
+)
+
+ts_library(
+    name = "test_lib",
+    srcs = glob(["tsc_wrapped/*_test.ts"]) + ["tsc_wrapped/test_support.ts"],
+    deps = [":tsc_wrapped"],
+    tsconfig = "//internal:tsc_wrapped/tsconfig.json",
+)
+
+jasmine_node_test(
+    name = "test",
+    srcs = [],
+    deps = [":test_lib"],
+)

internal/build_defs.bzl

@@ -195,6 +195,6 @@ ts_library = rule(
 def tsc_library(**kwargs):
   ts_library(
       supports_workers = False,
-      compiler = "//internal/tsc_wrapped:tsc",
+      compiler = "//internal:tsc",
       node_modules = "@build_bazel_rules_typescript_tsc_wrapped_deps//:node_modules",
       **kwargs)

internal/e2e/strict_deps/BUILD

@@ -16,6 +16,7 @@ licenses(["notice"])  # Apache 2.0
 
 package(default_visibility = ["//visibility:public"])
 
+
 load("//:defs.bzl", "ts_library")
 
 ts_library(

internal/executables.bzl

@@ -16,4 +16,4 @@
 """
 
 def get_tsc():
-  return Label("//internal/tsc_wrapped:tsc_wrapped_bin")
+  return Label("//internal:tsc_wrapped_bin")

internal/ts_repositories.bzl

@@ -20,8 +20,8 @@ load("@build_bazel_rules_nodejs//:defs.bzl", "yarn_install")
 def ts_setup_workspace():
   yarn_install(
       name = "build_bazel_rules_typescript_tsc_wrapped_deps",
-      package_json = "@build_bazel_rules_typescript//internal/tsc_wrapped:package.json",
-      yarn_lock = "@build_bazel_rules_typescript//internal/tsc_wrapped:yarn.lock",
+      package_json = "@build_bazel_rules_typescript//internal:tsc_wrapped/package.json",
+      yarn_lock = "@build_bazel_rules_typescript//internal:tsc_wrapped/yarn.lock",
   )
   yarn_install(
       name = "build_bazel_rules_typescript_devserver_deps",