laucher: add Ramda and refactor code a little

packages/launcher/index.js

@@ -10,5 +10,9 @@ if (!module.parent) {
   // quick way to check if TS is working
   console.log('Launcher project exports')
   console.log(launcher)
-  console.log('please use it as a module, not from CLI')
+  console.log('⛔️ please use it as a module, not from CLI')
+  launcher.detect().then(browsers => {
+    console.log('detected %d browser(s)', browsers.length)
+    console.log(browsers)
+  }, console.error)
 }

packages/launcher/lib/darwin/util.ts

@@ -1,38 +1,48 @@
 import {log} from '../log'
 import {NotInstalledError} from '../types'
+import {prop, tap} from 'ramda'
 import execa = require('execa')
 
 import fs = require('fs-extra')
 import path = require('path')
 import plist = require('plist')
 
-export function parse (p: string, prop: string) {
+export function parse (p: string, property: string) {
   const pl = path.join(p, 'Contents', 'Info.plist')
+  log('reading property file "%s"', pl)
+
+  const failed = (e: Error) => {
+    const msg = `Info.plist not found: ${pl}
+    ${e.message}`
+    const err = new Error(msg) as NotInstalledError
+    err.notInstalled = true
+    throw err
+  }
+
   return fs.readFile(pl, 'utf8')
-    .then(str => plist.parse(str))
-    .then(x => x[prop])
-    .catch((e) => {
-      const msg = `Info.plist not found: ${pl}
-      ${e.message}`
-      const err = new Error(msg) as NotInstalledError
-      err.notInstalled = true
-      throw err
-    })
+    .then(plist.parse)
+    .then(prop(property))
+    .catch(failed)
 }
 
 export function find (id: string): Promise<string> {
   const cmd = `mdfind 'kMDItemCFBundleIdentifier=="${id}"' | head -1`
   log('looking for bundle id %s using command: %s', id, cmd)
+
+  const logFound = (str: string) => {
+    log('found %s at %s', id, str)
+    return str
+  }
+
+  const failedToFind = () => {
+    log('could not find %s', id)
+    const err = new Error(`Browser not installed: ${id}`) as NotInstalledError
+    err.notInstalled = true
+    throw err
+  }
+
   return execa.shell(cmd)
-    .then(result => result.stdout)
-    .then((str: string) => {
-      log('found %s at %s', id, str)
-      return str
-    })
-    .catch(() => {
-      log('could not find %s', id)
-      const err = new Error(`Browser not installed: ${id}`) as NotInstalledError
-      err.notInstalled = true
-      throw err
-    })
+    .then(prop('stdout'))
+    .then(tap(logFound))
+    .catch(failedToFind)
 }

packages/launcher/package.json

@@ -37,11 +37,13 @@
     "typescript": "2.3.2"
   },
   "dependencies": {
+    "@types/ramda": "0.0.10",
     "bluebird": "^3.3.5",
     "debug": "^2.6.6",
     "execa": "^0.6.3",
     "fs-extra": "^3.0.0",
     "lodash": "^4.11.1",
-    "plist": "^1.2.0"
+    "plist": "^1.2.0",
+    "ramda": "^0.23.0"
   }
 }