From 2e1d9b3ad133671fee9fbcc12c082538cf911bee Mon Sep 17 00:00:00 2001
From: Fritz Lin <uxfritz@163.com>
Date: Wed, 8 Jun 2016 00:58:21 +0800
Subject: [PATCH] v0.0.1

---
 .gitignore   |  1 +
 README.md    | 26 +++++++++++++++++++
 cli.js       | 17 ++++++++++++
 index.js     | 73 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 package.json | 27 +++++++++++++++++++
 5 files changed, 144 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 README.md
 create mode 100755 cli.js
 create mode 100644 index.js
 create mode 100644 package.json

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..3c3629e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+node_modules
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..f80c56e
--- /dev/null
+++ b/README.md
@@ -0,0 +1,26 @@
+# evm
+
+> Electron Version Manager
+
+- [x] unix support
+- [ ] windows support (experimental)
+- [x] evm install
+- [x] evm use
+- [ ] evm ls
+
+```plain
+npm install -g evm
+```
+
+```plain
+evm install 0.33.6
+evm install 1.2.1
+evm use 1.2.1
+evm use 0.33.6
+```
+
+```
+// inspired by electron-download, electron-prebuilt
+// inspired by nvm, nrm, nwjs
+// inspired by prt
+```
diff --git a/cli.js b/cli.js
new file mode 100755
index 0000000..a1a5182
--- /dev/null
+++ b/cli.js
@@ -0,0 +1,17 @@
+#!/usr/bin/env node
+var args = process.argv.slice(2)
+var evm = require('./')
+
+switch (args[0]) {
+  case 'install':
+  case 'use':
+    evm[args[0]]({ version: args[1] }, function (err) {
+      // if (err) throw err
+      if (err) console.error(err)
+    })
+    break;
+  default:
+    console.info('repo: https://github.com/fritx/evm')
+    console.info('eg. evm install 1.2.1')
+    console.info('eg. evm use 0.33.5')
+}
diff --git a/index.js b/index.js
new file mode 100644
index 0000000..ac3062b
--- /dev/null
+++ b/index.js
@@ -0,0 +1,73 @@
+// inspired by electron-download, electron-prebuilt
+// inspired by nvm, nrm, nwjs
+// inspired by prt
+
+// todo: use promise
+// todo: evm ls
+var download = require('electron-download')
+var extract = require('extract-zip')
+var basename = require('path').basename
+var extname = require('path').extname
+var dirname = require('path').dirname
+var join = require('path').join
+var fs = require('fs')
+
+exports.install = install
+exports.use = use
+
+function install (opts, cb) {
+  opts.platform = opts.platform || process.platform
+  opts.arch = opts.arch || process.arch
+
+  download(opts, function (err, zip) {
+    if (err) return cb(err)
+    var dir = join(dirname(zip), basename(zip, '.zip'))
+    extract(zip, { dir: dir }, function (err) {
+      // if (err && err.code !== 'EEXIST') return cb(err)
+      if (err) return cb(err)
+      cb()
+    })
+  })
+}
+
+function use (opts, cb) {
+  opts.platform = opts.platform || process.platform
+  opts.arch = opts.arch || process.arch
+
+  var bin = {
+    darwin: 'Electron.app/Contents/MacOS/Electron',
+    freebsd: 'electron',
+    linux: 'electron',
+    win32: 'electron.exe'
+  }[opts.platform]
+  var dir = ['electron', 'v' + opts.version, opts.platform, opts.arch].join('-')
+  var dist = join(process.env.HOME, '.electron', dir, bin)
+
+  fs.exists(dist, function (exists) {
+    if (!exists) {
+      console.warn('v' + opts.version + ' is not installed')
+      return cb()
+    }
+    crosslink(dist, cb)
+  })
+}
+
+function crosslink (file, cb) {
+  if (process.platform === 'win32') {
+    winlink(file, cb)
+  } else {
+    var target = '/usr/local/bin/electron'
+    fs.unlink(target, function () {
+      fs.symlink(file, target, cb)
+    })
+  }
+}
+
+// experimental: windows support
+function winlink (file, cb) {
+  var ext = extname(file)
+  var base = basename(file, ext)
+  var cmdfile = join(process.env.windir, base + '.cmd')
+  var cmd = '"' + file + '" %*'
+  fs.writeFile(cmdfile, cmd, cb)
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..2b2e7e0
--- /dev/null
+++ b/package.json
@@ -0,0 +1,27 @@
+{
+  "name": "evm",
+  "description": "Electron Version Manager",
+  "version": "0.0.1",
+  "homepage": "https://github.com/fritx/evm",
+  "repository": "fritx/evm",
+  "license": "MIT",
+  "keywords": [
+    "evm",
+    "electron",
+    "atom-shell",
+    "atom",
+    "version",
+    "manager",
+    "switcher",
+    "binary",
+    "env"
+  ],
+  "bin": {
+    "evm": "cli.js"
+  },
+  "main": "index.js",
+  "dependencies": {
+    "electron-download": "^2.1.2",
+    "extract-zip": "^1.5.0"
+  }
+}