1 files changed, 97 insertions, 0 deletions
diff --git a/runtime/js/40_compiler_api.js b/runtime/js/40_compiler_api.js
new file mode 100644
index 000000000..ea963b67b
--- /dev/null
+++ b/runtime/js/40_compiler_api.js
@@ -0,0 +1,97 @@
+// 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.
+((window) => {
+  const core = window.Deno.core;
+  const util = window.__bootstrap.util;
+
+  function opCompile(request) {
+    return core.jsonOpAsync("op_compile", request);
+  }
+
+  function opTranspile(
+    request,
+  ) {
+    return core.jsonOpAsync("op_transpile", request);
+  }
+
+  function checkRelative(specifier) {
+    return specifier.match(/^([\.\/\\]|https?:\/{2}|file:\/{2})/)
+      ? specifier
+      : `./${specifier}`;
+  }
+
+  // TODO(bartlomieju): change return type to interface?
+  function transpileOnly(
+    sources,
+    options = {},
+  ) {
+    util.log("Deno.transpileOnly", { sources: Object.keys(sources), options });
+    const payload = {
+      sources,
+      options: JSON.stringify(options),
+    };
+    return opTranspile(payload);
+  }
+
+  // TODO(bartlomieju): change return type to interface?
+  async function compile(
+    rootName,
+    sources,
+    options = {},
+  ) {
+    const payload = {
+      rootName: sources ? rootName : checkRelative(rootName),
+      sources,
+      options: JSON.stringify(options),
+      bundle: false,
+    };
+    util.log("Deno.compile", {
+      rootName: payload.rootName,
+      sources: !!sources,
+      options,
+    });
+    /** @type {{ emittedFiles: Record<string, string>, diagnostics: any[] }} */
+    const result = await opCompile(payload);
+    util.assert(result.emittedFiles);
+    const maybeDiagnostics = result.diagnostics.length === 0
+      ? undefined
+      : result.diagnostics;
+
+    return [maybeDiagnostics, result.emittedFiles];
+  }
+
+  // TODO(bartlomieju): change return type to interface?
+  async function bundle(
+    rootName,
+    sources,
+    options = {},
+  ) {
+    const payload = {
+      rootName: sources ? rootName : checkRelative(rootName),
+      sources,
+      options: JSON.stringify(options),
+      bundle: true,
+    };
+    util.log("Deno.bundle", {
+      rootName: payload.rootName,
+      sources: !!sources,
+      options,
+    });
+    /** @type {{ emittedFiles: Record<string, string>, diagnostics: any[] }} */
+    const result = await opCompile(payload);
+    const output = result.emittedFiles["deno:///bundle.js"];
+    util.assert(output);
+    const maybeDiagnostics = result.diagnostics.length === 0
+      ? undefined
+      : result.diagnostics;
+    return [maybeDiagnostics, output];
+  }
+
+  window.__bootstrap.compilerApi = {
+    bundle,
+    compile,
+    transpileOnly,
+  };
+})(this);