Extact login logic to separate function

lib/login.js

@@ -0,0 +1,77 @@
+import { homedir } from 'os';
+import { join as pathJoin } from 'path';
+import readline from 'readline';
+import fs from 'fs-promise';
+import fetch from 'isomorphic-fetch';
+import { stringify as stringifyQuery } from 'querystring';
+
+const stdin = process.openStdin();
+
+function readEmail () {
+  return new Promise((resolve, reject) => {
+    process.stdout.write('> Enter your email address: ');
+    stdin.on('data', (d) => {
+      resolve(d.toString().trim());
+    });
+  });
+}
+
+async function getVerificationToken (email) {
+  const data = JSON.stringify({ email });
+  const res = await fetch('http://localhost:3001/', {
+    method: 'POST',
+    mode: 'cors',
+    headers: new Headers({
+      'Content-Type': 'application/json',
+      'Content-Length': data.length
+    }),
+    body: data
+  });
+
+  const body = await res.json();
+  return body.token;
+}
+
+async function verify (email, verificationToken) {
+  const query = {
+    email,
+    token: verificationToken
+  };
+
+  const res = await fetch('http://localhost:3001/verify?' + stringifyQuery(query));
+
+  const body = await res.json();
+  return body.token;
+}
+
+function sleep (ms) {
+  return new Promise((resolve, reject) => {
+    setTimeout(resolve, ms);
+  });
+}
+
+async function register () {
+  const email = await readEmail();
+  const verificationToken = await getVerificationToken(email);
+
+  console.log('> Please follow the link in your email to log in.');
+
+  let final;
+  do {
+    await sleep(5000);
+    try {
+      final = await verify(email, verificationToken);
+    } catch (e) {}
+  } while (!final);
+
+  return { email, token: final };
+}
+
+export default function () {
+  register().then((loginData) => {
+    return fs.writeFile(pathJoin(homedir(), '.now.json'), JSON.stringify(loginData));
+  }).then(() => {
+    console.log('> Registration successful. `now` is now ready to use. Your credentials are stored in `~/.now.json`');
+    process.exit(0);
+  });
+}

scripts/post-install.js

@@ -1,75 +1,3 @@
-import { homedir } from 'os';
-import { join as pathJoin } from 'path';
-import readline from 'readline';
-import fs from 'fs-promise';
-import fetch from 'isomorphic-fetch';
-import { stringify as stringifyQuery } from 'querystring';
+import login from '../lib/login';
 
-const stdin = process.openStdin();
-
-function readEmail () {
-  return new Promise((resolve, reject) => {
-    process.stdout.write('> Enter your email address: ');
-    stdin.on('data', (d) => {
-      resolve(d.toString().trim());
-    });
-  });
-}
-
-async function getVerificationToken (email) {
-  const data = JSON.stringify({ email });
-  const res = await fetch('http://localhost:3001/', {
-    method: 'POST',
-    mode: 'cors',
-    headers: new Headers({
-      'Content-Type': 'application/json',
-      'Content-Length': data.length
-    }),
-    body: data
-  });
-
-  const body = await res.json();
-  return body.token;
-}
-
-async function verify (email, verificationToken) {
-  const query = {
-    email,
-    token: verificationToken
-  };
-
-  const res = await fetch('http://localhost:3001/verify?' + stringifyQuery(query));
-
-  const body = await res.json();
-  return body.token;
-}
-
-function sleep (ms) {
-  return new Promise((resolve, reject) => {
-    setTimeout(resolve, ms);
-  });
-}
-
-async function register () {
-  const email = await readEmail();
-  const verificationToken = await getVerificationToken(email);
-
-  console.log('> Please follow the link in your email to log in.');
-
-  let final;
-  do {
-    await sleep(5000);
-    try {
-      final = await verify(email, verificationToken);
-    } catch (e) {}
-  } while (!final);
-
-  return { email, token: final };
-}
-
-register().then((loginData) => {
-  return fs.writeFile(pathJoin(homedir(), '.now.json'), JSON.stringify(loginData));
-}).then(() => {
-  console.log('> Registration successful. `now` is now ready to use. Your credentials are stored in `~/.now.json`');
-  process.exit(0);
-});
+login();