presets: cli func-ty

Author: Alexej Yaroshevich

lib/cli.js

@@ -1,6 +1,7 @@
 var path = require('path'),
     vow = require('vow'),
     vfs = require('vow-fs'),
+    colors = require('colors'),
     HtmlDiffer = require('./index').HtmlDiffer,
     diffLogger = require('./logger'),
     defaults = require('./utils/defaults');
@@ -28,18 +29,37 @@ module.exports = require('coa').Cmd()
         .end()
     .opt()
         .name('bem')
-        .title('Uses predefined options for BEM')
+        .title('Uses predefined options for BEM (deprecated)')
         .long('bem')
         .flag()
+        .act(function (opts) {
+            console.error('Option ' +  '--bem'.bold.red + ' is deprecated, use ' +
+                '--preset=bem'.bold.green + ' option instead.');
+            // support legacy
+            opts.preset = 'bem';
+            delete opts.bem;
+        })
+        .end()
+    .opt()
+        .name('preset')
+        .title('Name of preset')
+        .short('p').long('preset')
+        .val(function (val) {
+            if (!defaults.presets.hasOwnProperty(val)) {
+                console.log(val.bold.red + ' is an invalid preset name. Available presets are: ' +
+                    Object.keys(defaults.presets).map(colors.green).map(colors.bold).join(', ') + '.');
+                process.exit(1);
+            }
+            return val;
+        })
         .end()
     .opt()
         .name('charsAroundDiff')
         .title('The number of characters around the diff (default: 40)')
         .long('chars-around-diff')
         .def(40)
         .val(function (val) {
-            /*jshint es3:false */
-            return parseInt(val);
+            return parseInt(val, 10);
         })
         .end()
     .arg()
@@ -58,10 +78,10 @@ module.exports = require('coa').Cmd()
             vfs.read(path.resolve(args.path2), 'utf-8'),
             opts.config ? vfs.read(path.resolve(opts.config)) : undefined
         ]).spread(function (html1, html2, config) {
-            if (!opts.bem) {
-                config = config ? JSON.parse(config) : {};
-            } else {
-                config = 'bem';
+            config = config ? JSON.parse(config) : {};
+
+            if (opts.preset) {
+                config.preset = opts.preset;
             }
 
             var options = defaults(config),

lib/utils/defaults.js

@@ -42,3 +42,5 @@ var presets = {
         ignoreDuplicateAttributes: false
     });
 };
+
+module.exports.presets = presets;