Significant enhancements

package.json

@@ -14,7 +14,10 @@
     "build": "tsc",
     "build:watch": "tsc -w",
     "clean": "rm -rf ./dist",
-    "lint": "tslint src/**/*.ts",
+    "lint": "tslint src/**/*.ts && npm run prettier:check",
+    "prettier": "prettier 'src/**/*.[tj]s'",
+    "prettier:fix": "yarn prettier --write",
+    "prettier:check": "yarn prettier -l",
     "prepublishOnly": "npm run clean && npm run lint && npm run build -- -d",
     "pretest": "npm run build",
     "tdd": "concurrently -k 'npm run build:watch' 'npm run test:watch'",
@@ -23,23 +26,26 @@
     "test:watch": "ava -w"
   },
   "dependencies": {
-    "@babel/generator": "7.0.0-beta.38",
-    "@babel/traverse": "7.0.0-beta.38",
-    "@babel/types": "7.0.0-beta.38",
-    "glob": "^7.1.2",
-    "lodash": "^4.17.4",
-    "mz": "^2.7.0"
+    "@babel/generator": "7.2.2",
+    "@babel/parser": "7.2.3",
+    "@babel/traverse": "7.2.3",
+    "@babel/types": "7.2.2",
+    "glob": "^7.1.3",
+    "lodash": "^4.17.11",
+    "mz": "^2.7.0",
+    "stdin": "^0.0.1"
   },
   "devDependencies": {
-    "@types/glob": "^5.0.33",
-    "@types/lodash": "^4.14.86",
+    "@types/glob": "^7.1.1",
+    "@types/lodash": "^4.14.119",
     "@types/minimist": "^1.2.0",
     "@types/mz": "^0.0.32",
-    "ava": "^0.24.0",
-    "concurrently": "^3.5.1",
-    "flow-bin": "^0.59.0",
-    "tslint": "^5.8.0",
-    "typescript": "^2.6.2"
+    "ava": "^1.0.1",
+    "concurrently": "^4.1.0",
+    "flow-bin": "^0.89.0",
+    "prettier": "^1.15.3",
+    "tslint": "^5.12.0",
+    "typescript": "^3.2.2"
   },
   "ava": {
     "files": [

prettier.config.js

@@ -0,0 +1,6 @@
+module.exports = {
+  printWidth: 80,
+  semi: false,
+  singleQuote: true,
+  trailingComma: 'none',
+}

src/cli.ts

@@ -6,16 +6,17 @@ import { resolve } from 'path'
 import stdin = require('stdin')
 import { compile } from './index'
 
-main(minimist(process.argv.slice(2), {
-  alias: {
-    help: ['h'],
-    input: ['i'],
-    output: ['o']
-  }
-}))
+main(
+  minimist(process.argv.slice(2), {
+    alias: {
+      help: ['h'],
+      input: ['i'],
+      output: ['o']
+    }
+  })
+)
 
 async function main(argv: minimist.ParsedArgs) {
-
   if (argv.help) {
     printHelp()
     process.exit(0)
@@ -29,10 +30,10 @@ async function main(argv: minimist.ParsedArgs) {
     const ts = await compile(flow, argIn)
     await writeOutput(ts, argOut)
   } catch (e) {
-    process.stderr.write(e.message)
+    console.error(e)
+    //process.stderr.write(e.message)
     process.exit(1)
   }
-
 }
 
 function readInput(argIn?: string) {
@@ -58,7 +59,7 @@ function printHelp() {
   const pkg = require('../../package.json')
 
   process.stdout.write(
-`
+    `
 ${pkg.name} ${pkg.version}
 Usage: flow2ts [--input, -i] [IN_FILE] [--output, -o] [OUT_FILE]