Initial tsc attempt

packages/docusaurus-utils-plugin/bin/index.js

@@ -9,6 +9,7 @@ const chalk = require('chalk');
 const cli = require('commander');
 const build = require('../lib/build').default;
 const watch = require('../lib/watch').default;
+const tsc = require('../lib/tsc').default;
 
 cli
   .command('build')
@@ -26,6 +27,8 @@ cli
   .option('--ignore <pattern>')
   .action(watch);
 
+cli.command('tsc').action(tsc);
+
 cli.arguments('<command>').action((cmd) => {
   cli.outputHelp();
   console.log(`  ${chalk.red(`\n  Unknown command ${chalk.yellow(cmd)}.`)}`);

packages/docusaurus-utils-plugin/src/tsc.ts

@@ -0,0 +1,51 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import ts from 'typescript';
+
+export default function tsc(): void {
+  const currentDir = process.cwd();
+  const configFile = ts.findConfigFile(
+    currentDir,
+    ts.sys.fileExists,
+    'tsconfig.json',
+  );
+  if (!configFile) {
+    throw Error('tsconfig.json not found');
+  }
+  const {config} = ts.readConfigFile(configFile, ts.sys.readFile);
+
+  const {options, fileNames, errors} = ts.parseJsonConfigFileContent(
+    config,
+    ts.sys,
+    currentDir,
+  );
+
+  const program = ts.createIncrementalProgram({
+    options,
+    rootNames: fileNames,
+    configFileParsingDiagnostics: errors,
+  });
+
+  const {diagnostics, emitSkipped} = program.emit();
+
+  const allDiagnostics = diagnostics.concat(errors);
+
+  if (allDiagnostics.length) {
+    const formatHost: ts.FormatDiagnosticsHost = {
+      getCanonicalFileName: (path) => path,
+      getCurrentDirectory: ts.sys.getCurrentDirectory,
+      getNewLine: () => ts.sys.newLine,
+    };
+    const message = ts.formatDiagnostics(allDiagnostics, formatHost);
+    console.warn(message);
+  }
+
+  if (emitSkipped) {
+    process.exit(1);
+  }
+}