rewrite with commander

src/handlers/install.ts

@@ -0,0 +1,50 @@
+import { join } from 'path'
+import { chmodSync, renameSync, unlinkSync } from 'fs'
+import { tmpdir } from 'os'
+
+import axios from 'axios'
+import { Writer } from 'clitastic'
+
+import { INSTALL_DIR } from '..'
+import { checkIfCommandIsAvailable, checkIfResticIsAvailable, downloadFile, exec } from '../utils'
+
+export default async function install() {
+  try {
+    checkIfResticIsAvailable()
+    console.log('Restic is already installed')
+    return
+  } catch {}
+
+  const w = new Writer('Checking latest version... ⏳')
+  checkIfCommandIsAvailable('bzip2')
+  const { data: json } = await axios({
+    method: 'get',
+    url: 'https://api.github.com/repos/restic/restic/releases/latest',
+    responseType: 'json',
+  })
+
+  const archMap: { [a: string]: string } = {
+    x32: '386',
+    x64: 'amd64',
+  }
+
+  w.replaceLn('Downloading binary... 🌎')
+  const name = `${json.name.replace(' ', '_')}_${process.platform}_${archMap[process.arch]}.bz2`
+  const dl = json.assets.find((asset: any) => asset.name === name)
+  if (!dl) return console.log('Cannot get the right binary.'.red, 'Please see https://bit.ly/2Y1Rzai')
+
+  const tmp = join(tmpdir(), name)
+  const extracted = tmp.slice(0, -4) //without the .bz2
+
+  await downloadFile(dl.browser_download_url, tmp)
+
+  w.replaceLn('Decompressing binary... 📦')
+  exec('bzip2', ['-dk', tmp])
+  unlinkSync(tmp)
+
+  w.replaceLn(`Moving to ${INSTALL_DIR} 🚙`)
+  chmodSync(extracted, 0o755)
+  renameSync(extracted, INSTALL_DIR + '/restic')
+
+  w.done(`\nFinished! restic is installed under: ${INSTALL_DIR}`.underline + ' 🎉')
+}