[Config] add config command.

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

Author: skygragon

docs/advanced.md

@@ -48,7 +48,7 @@ The local cache folder (`.lc/`) is in your home directory, e.g.
 	problems.json                   # problems list
 	1.two-sum.algorithms.json       # specific problem info
 
-Normally you don't need dig into the folder to manipulate those files. Use [cache command](https://skygragon.github.io/leetcode-cli/commands#cache) instead.
+**NOTE: Normally you don't need dig into the folder to manipulate those files. Use [cache command](https://skygragon.github.io/leetcode-cli/commands#cache) instead.**
 
 # Configuration
 
@@ -87,6 +87,8 @@ Here are some useful settings:
 * `icon:theme` to set icon them used in output.
 * `plugins` to config each installed plugins, see [Plugins](#plugins).
 
+**NOTE: Normally you don't need dig into the folder to manipulate those files. Use [config command](https://skygragon.github.io/leetcode-cli/commands#config) instead.**
+
 *Example*
 
 Config for `github.js` and `cpp.lint.js` plugins:

docs/commands.md

@@ -5,6 +5,7 @@ title: Commands Help
 
 * [help](#help)
 * [cache](#cache)
+* [config](#config)
 * [list](#list)
 * [plugin](#plugin)
 * [show](#show)
@@ -73,6 +74,31 @@ Delete cache for problem 537:
 
 	$ leetcode cache -d 537
 
+# config
+
+Manage user config (~/.lcconfig).
+
+* `leetcode config` to show all user modified configs.
+* `-a` to show all user configs (includes default ones).
+* `leetcode config <key>` to show config item by key.
+* `leetcode config <key> <value>` to update config by key.
+* `-d` to delete config item by key.
+
+*Examples*
+
+Set config item:
+
+	$ leetcode config color:enable false
+
+**NOTE: the key is using colon ":" as the separator, not dot "."!**
+
+Show config item:
+
+	$ leetcode config color
+	{
+		"enable": true
+	}
+
 # list
 
 Navigate the problems.

lib/commands/config.js

@@ -0,0 +1,71 @@
+var _ = require('underscore');
+var nconf = require('nconf');
+
+var h = require('../helper');
+var config = require('../config');
+var log = require('../log');
+var session = require('../session');
+
+var cmd = {
+  command: 'config [key] [value]',
+  desc:    'show or set configurations',
+  builder: {
+    all: {
+      alias:    'a',
+      type:     'boolean',
+      describe: 'Show all user configuration',
+      default:  false
+    },
+    delete: {
+      alias:    'd',
+      type:     'boolean',
+      describe: 'Delete configuration',
+      default:  false
+    }
+  }
+};
+
+function prettyConfig(cfg) {
+  return JSON.stringify(cfg, null, 2);
+}
+
+function loadConfig(showall) {
+  var cfg = showall ? config.getAll(true) : nconf.get();
+  return _.omit(cfg, 'type');
+}
+
+function saveConfig() {
+  require('fs').writeFileSync(h.getConfigFile(), prettyConfig(loadConfig(false)));
+}
+
+cmd.handler = function(argv) {
+  session.argv = argv;
+  nconf.file('local', h.getConfigFile());
+
+  // show all
+  if (argv.key === undefined)
+    return log.info(prettyConfig(loadConfig(argv.all)));
+
+  var v = nconf.get(argv.key);
+
+  // delete
+  if (argv.delete) {
+    if (v === undefined) return log.error('Key not found: ' + argv.key);
+    nconf.clear(argv.key);
+    return saveConfig();
+  }
+
+  // show
+  if (argv.value === undefined) {
+    if (v === undefined) return log.error('Key not found: ' + argv.key);
+    return log.info(prettyConfig(v));
+  }
+
+  // set
+  if (argv.value === 'true') argv.value = true;
+  if (argv.value === 'false') argv.value = false;
+  nconf.set(argv.key, argv.value);
+  return saveConfig();
+};
+
+module.exports = cmd;

lib/config.js

@@ -68,10 +68,14 @@ var DEFAULT_CONFIG = {
 function Config() {}
 
 Config.prototype.init = function() {
-  nconf.file(h.getConfigFile())
-    .defaults(DEFAULT_CONFIG);
+  nconf.file('local', h.getConfigFile())
+    .add('global', {type: 'literal', store: DEFAULT_CONFIG})
+    .defaults({});
 
   var cfg = nconf.get();
+  nconf.remove('local');
+  nconf.remove('global');
+
   // HACK: remove old style configs
   for (var x in cfg) {
     if (x === x.toUpperCase()) delete cfg[x];