refs #20: show last git commit in 'version'.

* for trace purpose, only works when installed from git source.

Signed-off-by: Eric Wang <skygragon@gmail.com>

Author: skygragon

bin/prepare

@@ -0,0 +1,11 @@
+#!/bin/bash
+cat << EOF > .env.json
+{
+  "commit": {
+    "full": "`git rev-parse HEAD`",
+    "short": "`git rev-parse --short HEAD`"
+  },
+  "node": "`node -v`",
+  "npm": "`npm -v`"
+}
+EOF

docs/install.md

@@ -26,7 +26,7 @@ Choose one of the following ways to install leetcode-cli:
 **From source code**
 
     $ git clone http://github.com/skygragon/leetcode-cli
-    $ cd leetcode-cli && npm install && sudo npm install -g .
+    $ cd leetcode-cli && npm install && sudo npm install -g --unsafe-perm .
 
 Then verify the result:
 

lib/commands/version.js

@@ -12,11 +12,22 @@ function prettyLine(k, v) {
   log.info(sprintf('%-20s %s', k + ':', v));
 }
 
-cmd.handler = function(argv) {
+function getVersion() {
   var version = require('../../package.json').version;
-  if (log.getLevel() >= log.levels.INFO) {
+
+  try {
+    var commit = require('../../.env.json').commit.short;
+    if (commit) version += '-' + commit;
+  } catch (e) {}
+
+  return version;
+}
+
+cmd.handler = function(argv) {
+  var version = getVersion();
+
+  if (log.getLevel() >= log.levels.INFO)
     return log.info(version);
-  }
 
   var logo = [
     ' _           _                  _      ',

package.json

@@ -8,7 +8,8 @@
   },
   "scripts": {
     "lint": "eslint lib/ test/",
-    "test": "npm run lint && nyc mocha test/"
+    "test": "npm run lint && nyc mocha test/",
+    "prepare": "./bin/prepare"
   },
   "repository": {
     "type": "git",