[kbn/plugin-helpers] typescript-ify (elastic#66513)

# Conflicts:
#	renovate.json5

.eslintrc.js

@@ -495,7 +495,6 @@ module.exports = {
         '.eslintrc.js',
         '**/webpackShims/**/*.js',
         'packages/kbn-plugin-generator/**/*.js',
-        'packages/kbn-plugin-helpers/**/*.js',
         'packages/kbn-eslint-import-resolver-kibana/**/*.js',
         'packages/kbn-eslint-plugin-eslint/**/*',
         'x-pack/gulpfile.js',

packages/kbn-plugin-helpers/bin/plugin-helpers.js

@@ -25,4 +25,4 @@ if (nodeMajorVersion < 6) {
   process.exit(1);
 }
 
-require('../cli');
+require('../target/cli');

packages/kbn-plugin-helpers/package.json

@@ -1,17 +1,16 @@
 {
   "name": "@kbn/plugin-helpers",
-  "private": true,
   "version": "9.0.2",
+  "private": true,
   "description": "Just some helpers for kibana plugin devs.",
-  "main": "lib/index.js",
+  "license": "Apache-2.0",
+  "main": "target/lib/index.js",
+  "scripts": {
+    "kbn:bootstrap": "tsc"
+  },
   "bin": {
     "plugin-helpers": "bin/plugin-helpers.js"
   },
-  "author": "Spencer Alger <email@spalger.com>",
-  "license": "Apache-2.0",
-  "peerDependencies": {
-    "@kbn/babel-preset": "1.0.0"
-  },
   "dependencies": {
     "@babel/core": "^7.9.0",
     "argv-split": "^2.0.1",
@@ -27,6 +26,20 @@
     "node-sass": "^4.13.1",
     "through2": "^2.0.3",
     "through2-map": "^3.0.0",
+    "vinyl": "^2.2.0",
     "vinyl-fs": "^3.0.3"
+  },
+  "devDependencies": {
+    "@types/gulp-rename": "^0.0.33",
+    "@types/gulp-zip": "^4.0.1",
+    "@types/inquirer": "^6.5.0",
+    "@types/node-sass": "^4.11.0",
+    "@types/through2": "^2.0.35",
+    "@types/through2-map": "^3.0.0",
+    "@types/vinyl": "^2.0.4",
+    "typescript": "3.7.2"
+  },
+  "peerDependencies": {
+    "@kbn/babel-preset": "1.0.0"
   }
 }

packages/kbn-plugin-helpers/cli.js → packages/kbn-plugin-helpers/src/cli.ts

@@ -17,13 +17,16 @@
  * under the License.
  */
 
-const program = require('commander');
+import Fs from 'fs';
+import Path from 'path';
 
-const pkg = require('./package.json');
-const createCommanderAction = require('./lib/commander_action');
-const docs = require('./lib/docs');
-const enableCollectingUnknownOptions = require('./lib/enable_collecting_unknown_options');
+import program from 'commander';
 
+import { createCommanderAction } from './lib/commander_action';
+import { docs } from './lib/docs';
+import { enableCollectingUnknownOptions } from './lib/enable_collecting_unknown_options';
+
+const pkg = JSON.parse(Fs.readFileSync(Path.resolve(__dirname, '../package.json'), 'utf8'));
 program.version(pkg.version);
 
 enableCollectingUnknownOptions(
@@ -55,7 +58,7 @@ program
       buildVersion: command.buildVersion,
       kibanaVersion: command.kibanaVersion,
       skipArchive: Boolean(command.skipArchive),
-      files: files,
+      files,
     }))
   );
 
@@ -84,7 +87,7 @@ program
   .on('--help', docs('test/mocha'))
   .action(
     createCommanderAction('testMocha', (command, files) => ({
-      files: files,
+      files,
     }))
   );
 

packages/kbn-plugin-helpers/lib/commander_action.test.js → packages/kbn-plugin-helpers/src/lib/commander_action.test.js

@@ -17,12 +17,10 @@
  * under the License.
  */
 
-/*eslint-env jest*/
+import { createCommanderAction } from './commander_action';
+import { run } from './run';
 
-const createCommanderAction = require('./commander_action');
-const run = require('./run');
-
-jest.mock('./run', () => jest.fn());
+jest.mock('./run');
 
 const STACK_TRACE_RE = /\n(?:\s+at .+(?:\n|$))+/g;
 expect.addSnapshotSerializer({

packages/kbn-plugin-helpers/lib/commander_action.js → packages/kbn-plugin-helpers/src/lib/commander_action.ts

@@ -17,10 +17,13 @@
  * under the License.
  */
 
-const run = require('./run');
+import { run } from './run';
+import { Tasks } from './tasks';
 
-module.exports = function createCommanderAction(taskName, getOptions = () => {}) {
-  return async (...args) => {
+type GetOptions = (command: any, ...args: string[]) => any;
+
+export function createCommanderAction(taskName: keyof Tasks, getOptions: GetOptions = () => {}) {
+  return async (...args: string[]) => {
     try {
       // command is the last arg passed by commander, but we move it to the front of the list
       const command = args.pop();
@@ -30,4 +33,4 @@ module.exports = function createCommanderAction(taskName, getOptions = () => {})
       process.exit(1);
     }
   };
-};
+}

packages/kbn-plugin-helpers/lib/config_file.js → packages/kbn-plugin-helpers/src/lib/config_file.ts

@@ -17,33 +17,34 @@
  * under the License.
  */
 
-const resolve = require('path').resolve;
-const readFileSync = require('fs').readFileSync;
+import { resolve } from 'path';
+import { readFileSync } from 'fs';
 
-const configFiles = ['.kibana-plugin-helpers.json', '.kibana-plugin-helpers.dev.json'];
-const configCache = {};
+const configFileNames = ['.kibana-plugin-helpers.json', '.kibana-plugin-helpers.dev.json'];
 
-module.exports = function(root) {
-  if (!root) root = process.cwd();
+interface Config {
+  [key: string]: unknown;
+}
 
-  if (configCache[root]) {
-    return configCache[root];
+const configCache = new Map<string, Config>();
+
+export function configFile(root: string = process.cwd()) {
+  if (configCache.has(root)) {
+    return configCache.get(root)!;
   }
 
   // config files to read from, in the order they are merged together
-  let config = (configCache[root] = {});
-
-  configFiles.forEach(function(configFile) {
+  let config: Config = {};
+  for (const name of configFileNames) {
     try {
-      const content = JSON.parse(readFileSync(resolve(root, configFile)));
-      config = Object.assign(config, content);
+      config = JSON.parse(readFileSync(resolve(root, name), 'utf8'));
     } catch (e) {
       // rethrow error unless it's complaining about file not existing
       if (e.code !== 'ENOENT') {
         throw e;
       }
     }
-  });
+  }
 
   const deprecationMsg =
     'has been removed from `@kbn/plugin-helpers`. ' +
@@ -59,8 +60,10 @@ module.exports = function(root) {
   }
 
   // use resolve to ensure correct resolution of paths
-  const { includePlugins } = config;
-  if (includePlugins) config.includePlugins = includePlugins.map(path => resolve(root, path));
+  if (Array.isArray(config.includePlugins)) {
+    config.includePlugins = config.includePlugins.map((path: string) => resolve(root, path));
+  }
 
+  configCache.set(root, config);
   return config;
-};
+}

packages/kbn-plugin-helpers/lib/docs.js → packages/kbn-plugin-helpers/src/lib/docs.ts

@@ -17,21 +17,19 @@
  * under the License.
  */
 
-const resolve = require('path').resolve;
-const readFileSync = require('fs').readFileSync;
+import { resolve } from 'path';
+import { readFileSync } from 'fs';
 
-function indent(txt, n) {
+function indent(txt: string, n: number) {
   const space = new Array(n + 1).join(' ');
   return space + txt.split('\n').join('\n' + space);
 }
 
-module.exports = function docs(name) {
-  const md = readFileSync(resolve(__dirname, '../tasks', name, 'README.md'), 'utf8');
+export function docs(name: string) {
+  const md = readFileSync(resolve(__dirname, '../../src/tasks', name, 'README.md'), 'utf8');
 
   return function() {
-    console.log('\n  Docs:');
-    console.log('');
-    console.log(indent(md, 4));
-    console.log('');
+    /* eslint-disable-next-line no-console */
+    console.log(`\n  Docs:\n\n${indent(md, 4)}\n\n`);
   };
-};
+}

packages/kbn-plugin-helpers/lib/enable_collecting_unknown_options.js → packages/kbn-plugin-helpers/src/lib/enable_collecting_unknown_options.ts

@@ -17,12 +17,14 @@
  * under the License.
  */
 
-module.exports = function enableCollectingUnknownOptions(command) {
+import { Command } from 'commander';
+
+export function enableCollectingUnknownOptions(command: Command) {
   const origParse = command.parseOptions;
   command.allowUnknownOption();
-  command.parseOptions = function(argv) {
+  command.parseOptions = function(argv: string[]) {
     const opts = origParse.call(this, argv);
     this.unknownOptions = opts.unknown;
     return opts;
   };
-};
+}