Add basic commands

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

Author: skygragon

bin/lc

@@ -1,3 +1,3 @@
 #!/usr/bin/env node
 
-console.log("TBD");
+require('../lib/cli');

lib/cli.js

@@ -0,0 +1,6 @@
+var yargs = require('yargs');
+
+yargs.commandDir('commands')
+  .help()
+  .strict()
+  .argv;

lib/commands/list.js

@@ -0,0 +1,21 @@
+var cmd = {
+  command: 'list [--cached|-c] [--undone|-D]',
+  desc: 'List all problems',
+  builder: {
+    cached: {
+      alias: 'c',
+      describe: 'List cached problems.'
+    },
+    undone: {
+      alias: 'D',
+      describe: 'List undone problems.'
+    }
+  }
+};
+
+cmd.handler = function(argv) {
+  // TODO
+  console.log(argv);
+}
+
+module.exports = cmd;

lib/commands/show.js

@@ -0,0 +1,16 @@
+var cmd = {
+  command: 'show <problem>',
+  desc: 'Show problem details',
+  builder: {
+    problem: {
+      describe: 'Problem name or number.'
+    }
+  }
+};
+
+cmd.handler = function(argv) {
+  // TODO
+  console.log(argv);
+}
+
+module.exports = cmd;

lib/commands/update.js

@@ -0,0 +1,21 @@
+var cmd = {
+  command: 'update [--cached|-c] [--all|-a]',
+  desc: 'Update problems list from leetcode',
+  builder: {
+    all: {
+      alias: 'a',
+      describe: 'Update all problems. (slow!)'
+    },
+    cached: {
+      alias: 'c',
+      describe: 'Also update those cached problems.'
+    }
+  }
+};
+
+cmd.handler = function(argv) {
+  // TODO
+  console.log(argv);
+}
+
+module.exports = cmd;

package.json

@@ -4,7 +4,7 @@
   "description": "A cli tool to enjoy leetcode!",
   "preferGlobal": "true",
   "bin": {
-      "lc": "./bin/lc"
+    "lc": "./bin/lc"
   },
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
@@ -27,5 +27,8 @@
   "bugs": {
     "url": "https://github.com/skygragon/leetcode-cli/issues"
   },
-  "homepage": "https://github.com/skygragon/leetcode-cli#readme"
+  "homepage": "https://github.com/skygragon/leetcode-cli#readme",
+  "dependencies": {
+    "yargs": "^5.0.0"
+  }
 }