Runtime Compiler API (#3442)

Also restructures the compiler TypeScript files to make them easier to
manage and eventually integrate deno_typescript fully.

cli/js/compiler_api_test.ts

@@ -0,0 +1,105 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+
+import { assert, assertEquals, test } from "./test_util.ts";
+
+const { compile, transpileOnly, bundle } = Deno;
+
+test(async function compilerApiCompileSources() {
+  const [diagnostics, actual] = await compile("/foo.ts", {
+    "/foo.ts": `import * as bar from "./bar.ts";\n\nconsole.log(bar);\n`,
+    "/bar.ts": `export const bar = "bar";\n`
+  });
+  assert(diagnostics == null);
+  assert(actual);
+  assertEquals(Object.keys(actual), [
+    "/bar.js.map",
+    "/bar.js",
+    "/foo.js.map",
+    "/foo.js"
+  ]);
+});
+
+test(async function compilerApiCompileNoSources() {
+  const [diagnostics, actual] = await compile("./cli/tests/subdir/mod1.ts");
+  assert(diagnostics == null);
+  assert(actual);
+  const keys = Object.keys(actual);
+  assertEquals(keys.length, 6);
+  assert(keys[0].endsWith("print_hello.js.map"));
+  assert(keys[1].endsWith("print_hello.js"));
+});
+
+test(async function compilerApiCompileOptions() {
+  const [diagnostics, actual] = await compile(
+    "/foo.ts",
+    {
+      "/foo.ts": `export const foo = "foo";`
+    },
+    {
+      module: "amd",
+      sourceMap: false
+    }
+  );
+  assert(diagnostics == null);
+  assert(actual);
+  assertEquals(Object.keys(actual), ["/foo.js"]);
+  assert(actual["/foo.js"].startsWith("define("));
+});
+
+test(async function transpileOnlyApi() {
+  const actual = await transpileOnly({
+    "foo.ts": `export enum Foo { Foo, Bar, Baz };\n`
+  });
+  assert(actual);
+  assertEquals(Object.keys(actual), ["foo.ts"]);
+  assert(actual["foo.ts"].source.startsWith("export var Foo;"));
+  assert(actual["foo.ts"].map);
+});
+
+test(async function transpileOnlyApiConfig() {
+  const actual = await transpileOnly(
+    {
+      "foo.ts": `export enum Foo { Foo, Bar, Baz };\n`
+    },
+    {
+      sourceMap: false,
+      module: "amd"
+    }
+  );
+  assert(actual);
+  assertEquals(Object.keys(actual), ["foo.ts"]);
+  assert(actual["foo.ts"].source.startsWith("define("));
+  assert(actual["foo.ts"].map == null);
+});
+
+test(async function bundleApiSources() {
+  const [diagnostics, actual] = await bundle("/foo.ts", {
+    "/foo.ts": `export * from "./bar.ts";\n`,
+    "/bar.ts": `export const bar = "bar";\n`
+  });
+  assert(diagnostics == null);
+  assert(actual.includes(`instantiate("foo")`));
+  assert(actual.includes(`__rootExports["bar"]`));
+});
+
+test(async function bundleApiNoSources() {
+  const [diagnostics, actual] = await bundle("./cli/tests/subdir/mod1.ts");
+  assert(diagnostics == null);
+  assert(actual.includes(`instantiate("mod1")`));
+  assert(actual.includes(`__rootExports["printHello3"]`));
+});
+
+test(async function bundleApiConfig() {
+  const [diagnostics, actual] = await bundle(
+    "/foo.ts",
+    {
+      "/foo.ts": `// random comment\nexport * from "./bar.ts";\n`,
+      "/bar.ts": `export const bar = "bar";\n`
+    },
+    {
+      removeComments: true
+    }
+  );
+  assert(diagnostics == null);
+  assert(!actual.includes(`random`));
+});