[WIP] Use yargs

README.md

@@ -1,9 +1,9 @@
 # f2t
-CLI tool for converting Flow code into Typescript
+CLI tool for converting Flow code into Typescript  
 
 ## Usage
 ```
-$ f2t ./src
+$ npx f2t ./src
 ```
 
 ## Dependency

package.json

@@ -5,7 +5,7 @@
   "main": "dist/index.js",
   "license": "MIT",
   "scripts": {
-    "build": "rm -rf dist && tsc -w",
+    "build": "rm -rf dist && tsc",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "bin": {
@@ -30,16 +30,21 @@
   "homepage": "https://github.com/nd-02110114/f2t#readme",
   "dependencies": {
     "@babel/core": "^7.1.2",
-    "@babel/plugin-syntax-object-rest-spread": "^7.0.0",
     "@babel/plugin-syntax-class-properties": "^7.0.0",
     "@babel/plugin-syntax-flow": "^7.0.0",
     "@babel/plugin-syntax-jsx": "^7.0.0",
+    "@babel/plugin-syntax-object-rest-spread": "^7.0.0",
     "@cureapp/babel-plugin-flow-to-typescript": "^0.3.7",
-    "prettier": "^1.14.3"
+    "chalk": "^2.4.1",
+    "ms": "^2.1.1",
+    "prettier": "^1.14.3",
+    "yargs": "^12.0.5"
   },
   "devDependencies": {
+    "@types/chalk": "^2.2.0",
     "@types/node": "^10.11.7",
     "@types/prettier": "^1.13.2",
+    "@types/yargs": "^12.0.1",
     "tslint": "^5.11.0",
     "typescript": "^3.1.3"
   }

src/args.ts

@@ -0,0 +1,22 @@
+import * as yargs from "yargs";
+// @ts-ignore
+import * as pkg from "../package.json";
+
+export type CLIOptions = {
+  input: string
+}
+
+const args = yargs
+  .version(pkg.version)
+  .option("input", {
+    alias: "i",
+    demandOption: true,
+    describe: "Set the directory path you want to convert",
+    type: "string",
+  })
+  .help("help")
+  .detectLocale(false)
+
+const { _: [target], ...flags } = args.argv;
+
+export { flags };

src/cli.ts

@@ -0,0 +1,56 @@
+#!/usr/bin/env node
+import * as fs from 'fs'
+import * as path from 'path'
+import * as babel from '@babel/core'
+import * as prettier from 'prettier'
+import * as chalk from 'chalk'
+import * as babelConfig from './config/.babelrc.js'
+import * as prettierDefaultConfig from './config/.prettierrc.js'
+import { walk, isJsxFile, deleteAtFlow } from './utils'
+import { flags } from './args'
+
+const fsThrowError = (err: NodeJS.ErrnoException) => {
+  if(err) throw err
+}
+
+// convert (babel, prettier, rename)
+const converter = async (fullPath: string): Promise<void> => {
+  try {
+    const isJsFile = fullPath.match(/(js|jsx)$/)
+    if (isJsFile == null) {
+      return
+    }
+
+    const config = { cwd: path.join(__dirname, '../'), ...babelConfig }
+    // flow code is compiled by babel
+    const result = await babel.transformFileAsync(fullPath, config)
+    const babeledCode = result.code
+    const deletedAtFlowCode = deleteAtFlow(babeledCode)
+    // prettier
+    // @ts-ignore
+    const formattedCode = prettier.format(deletedAtFlowCode, prettierDefaultConfig)
+    fs.writeFile(fullPath, formattedCode, fsThrowError)
+    // js → ts,tsx
+    const extension = isJsxFile(formattedCode) ? 'tsx' : 'ts'
+    const newPath = fullPath.replace(/(js|jsx)$/, '') + extension
+    fs.rename(fullPath, newPath, fsThrowError)
+    const cwdPath = path.resolve('.')
+    console.log(`${path.relative(cwdPath, fullPath)} -> ${path.relative(cwdPath, newPath)}`)
+  } catch (e) {
+    throw e
+  }
+}
+
+// main process
+const main = async () => {
+  const filePath = flags.input
+  const absPath = path.resolve(filePath)
+  await walk(absPath, converter)
+  // @ts-ignore
+  // console.log(chalk.bold.underline('\n🔥 Finish coverting from flow code to typescript!!'))
+}
+
+main().catch((e: Error) => {
+  // @ts-ignore
+  console.error(chalk.red(e.stack))
+})

src/babel.config.js → src/config/.babelrc.js

@@ -4,7 +4,7 @@ module.exports =  {
     "@babel/plugin-syntax-class-properties",
     "@babel/plugin-syntax-flow",
     "@babel/plugin-syntax-jsx",
-    "./dist/babel-plugin-flow-to-typescript-react.js",
+    "./dist/babel-plugin-flow-to-typescript-react/index.js",
     "@cureapp/babel-plugin-flow-to-typescript"
   ]
 }

src/utils.ts

@@ -0,0 +1,47 @@
+import * as fs from 'fs'
+import * as path from 'path'
+
+// judge whether the file is a jsx file or not
+export const isJsxFile = (code: string): boolean => {
+  const lines = code.split('\n').filter((line: string) =>
+    line.match(/^\/\//) == null && line.match(/from ("|')react("|')/),
+  )
+  if (lines.length > 0) {
+    return true
+  }
+  return false
+}
+
+// delete @flow & $Flow
+export const deleteAtFlow = (code: string): string => {
+  const lines = code.split('\n')
+  const newLines = lines.filter((line: string) => line.match(/(@flow|\$Flow)/) == null)
+  return newLines.join('\n')
+}
+
+// searching files recursively
+// ref：https://qiita.com/amay077/items/cc6ee3e66040a5097230
+type fileCallbackType = (path: string) => Promise<void>
+
+export const walk = async (inputPath: string, fileCallback: fileCallbackType): Promise<void> => {
+  return await fs.readdir(inputPath, async (err, files) => {
+    if (err) {
+      throw err
+    }
+
+    await files.forEach(async (f: string) => {
+      try {
+        const fullPath = path.join(inputPath, f)
+        if (fs.statSync(fullPath).isDirectory()) {
+          // This recursion happens if the path indicates a directory
+          return await walk(fullPath, fileCallback)
+        } else {
+          return await fileCallback(fullPath)
+        }
+      } catch(e) {
+        throw e
+      }
+    })
+  })
+}
+

tsconfig.json

@@ -4,15 +4,18 @@
     "module": "commonjs",
     "moduleResolution": "node",
     "outDir": "./dist",
+    "lib": ["esnext"],
     "strict": true,
     "noImplicitAny": true,
     "strictNullChecks": true,
     "noImplicitThis": true,
     "alwaysStrict": true,
     "noUnusedParameters": true,
     "allowJs": true,
-    "baseUrl": "./src",
+    "baseUrl": ".",
     "paths": {"@babel/core": ["types/base-core"]},
     "typeRoots": ["types", "node_modules/@types"],
+    // "resolveJsonModule": true
   },
+  "include": ["src"]
 }