bem create: Support b__e_m form of declaration of BEM-entities to create

lib/commands/create.js

@@ -17,7 +17,6 @@ module.exports = function() {
         .opt()
             .name('block').short('b').long('block')
             .title('block name')
-            .req()
             .arr()
             .end()
         .opt()
@@ -40,6 +39,11 @@ module.exports = function() {
             .title('force files creation')
             .flag()
             .end()
+        .arg()
+            .name('entities')
+            .title('BEM entities to create in form of block__elem_mod_val')
+            .arr()
+            .end()
         .act(function(opts, args) {
 
             var context = new Context(opts.level, opts),
@@ -88,11 +92,32 @@ module.exports = function() {
                     items.push(bemUtil.extend({ val: val }, itemBase));
                 },
 
+                prev = {},
+                eachEntity = function(key) {
+                    var partial = bemUtil.bemParseKey(key),
+                        item = {};
+
+                    // Try to reconstruct base item object from previous item
+                    if (!partial.block && prev.block) {
+                        item.block = prev.block;
+
+                        if (partial.mod && prev.elem) {
+                            item.elem = prev.elem;
+                        }
+                    }
+
+                    prev = bemUtil.extend(item, partial);
+                    if (!prev.block) return;
+
+                    items.push(prev);
+                },
+
                 techs = context.getDefaultTechs();
 
             if (!techs.length) return Q.reject('You should specify techs to create using --force-tech, -T or --add-tech, -t options');
 
-            opts.block.forEach(eachBlock);
+            opts.block && opts.block.forEach(eachBlock);
+            args.entities && args.entities.forEach(eachEntity);
 
             return Q.all(items.map(function(item) {
                     return Q.all(techs.map(function(t) {

lib/util.js

@@ -616,10 +616,17 @@ exports.bemFullKey = function(item) {
  */
 exports.bemType = function(item) {
 
-    var type = item.elem? 'elem' : 'block';
+    var type = '';
+
+    if (item.block) {
+        type += 'block';
+    }
+    else if (item.elem) {
+        type += 'elem';
+    }
 
     if (item.mod) {
-        type += '-mod';
+        type += (type? '-' : '') + 'mod';
         item.val && (type += '-val');
     }
 
@@ -628,7 +635,7 @@ exports.bemType = function(item) {
 };
 
 var bemItemRe = '([^_.]+)',
-    bemKeyRe = new RegExp('^' + bemItemRe +
+    bemKeyRe = new RegExp('^(?:' + bemItemRe + ')?' +
         '(?:__' + bemItemRe + ')?(?:_' + bemItemRe + '(?:_' + bemItemRe + ')?)?' +
         '(?:\.' + bemItemRe + ')?$');
 
@@ -641,8 +648,9 @@ var bemItemRe = '([^_.]+)',
 exports.bemParseKey = function(key) {
 
     var m = bemKeyRe.exec(key),
-        item = { block: m[1] };
+        item = {};
 
+    m[1] && (item.block = m[1]);
     m[2] && (item.elem = m[2]);
     m[3] && (item.mod = m[3]);
     m[4] && (item.val = m[4]);