refactor: merge TS compiler into single file (#5091)

cli/js/compiler_api.ts

@@ -0,0 +1,84 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+
+// This file contains the runtime APIs which will dispatch work to the internal
+// compiler within Deno.
+
+import { DiagnosticItem } from "./diagnostics.ts";
+import * as util from "./util.ts";
+import * as runtimeCompilerOps from "./ops/runtime_compiler.ts";
+import { TranspileOnlyResult } from "./ops/runtime_compiler.ts";
+import { CompilerOptions } from "./compiler_options.ts";
+
+function checkRelative(specifier: string): string {
+  return specifier.match(/^([\.\/\\]|https?:\/{2}|file:\/{2})/)
+    ? specifier
+    : `./${specifier}`;
+}
+
+// TODO(bartlomieju): change return type to interface?
+export function transpileOnly(
+  sources: Record<string, string>,
+  options: CompilerOptions = {}
+): Promise<Record<string, TranspileOnlyResult>> {
+  util.log("Deno.transpileOnly", { sources: Object.keys(sources), options });
+  const payload = {
+    sources,
+    options: JSON.stringify(options),
+  };
+  return runtimeCompilerOps.transpile(payload);
+}
+
+// TODO(bartlomieju): change return type to interface?
+export async function compile(
+  rootName: string,
+  sources?: Record<string, string>,
+  options: CompilerOptions = {}
+): Promise<[DiagnosticItem[] | undefined, Record<string, string>]> {
+  const payload = {
+    rootName: sources ? rootName : checkRelative(rootName),
+    sources,
+    options: JSON.stringify(options),
+    bundle: false,
+  };
+  util.log("Deno.compile", {
+    rootName: payload.rootName,
+    sources: !!sources,
+    options,
+  });
+  const result = await runtimeCompilerOps.compile(payload);
+  util.assert(result.emitMap);
+  const maybeDiagnostics =
+    result.diagnostics.length === 0 ? undefined : result.diagnostics;
+
+  const emitMap: Record<string, string> = {};
+
+  for (const [key, emmitedSource] of Object.entries(result.emitMap)) {
+    emitMap[key] = emmitedSource.contents;
+  }
+
+  return [maybeDiagnostics, emitMap];
+}
+
+// TODO(bartlomieju): change return type to interface?
+export async function bundle(
+  rootName: string,
+  sources?: Record<string, string>,
+  options: CompilerOptions = {}
+): Promise<[DiagnosticItem[] | undefined, string]> {
+  const payload = {
+    rootName: sources ? rootName : checkRelative(rootName),
+    sources,
+    options: JSON.stringify(options),
+    bundle: true,
+  };
+  util.log("Deno.bundle", {
+    rootName: payload.rootName,
+    sources: !!sources,
+    options,
+  });
+  const result = await runtimeCompilerOps.compile(payload);
+  util.assert(result.output);
+  const maybeDiagnostics =
+    result.diagnostics.length === 0 ? undefined : result.diagnostics;
+  return [maybeDiagnostics, result.output];
+}