use regex to get comment

.gitignore

@@ -1 +1,3 @@
-node_modules
+node_modules
+bundle.js
+bundle.js.map

example.js

@@ -15,3 +15,15 @@ var ab = {
  "B can't see this"
 })()
 /* #end */
+
+// #if version-b,version-c
+(function(){
+ "A can't see this"
+})()
+// #end
+
+// #if version-a,version-c
+(function(){
+ "B can't see this"
+})()
+// #end

lib/collect.js

@@ -1,21 +1,34 @@
-module.exports = function(comments) {
+var re = /(\/\*([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*+\/)|(\/\/(.*))/g
+module.exports = function(source) {
   var collect = []
   var data = []
-  comments.forEach(function(comment) {
-    var value = comment.value.trim()
-    if (value.indexOf('#if') === 0) {
-      comment.append = {
-        if: true
-      }
-      data.push(comment)
+  re.lastIndex = 0
+
+  var match
+  while (match = re.exec(source)) {
+    var v = match[0]
+    if(v.indexOf('/*') === 0){
+      v = v.slice(0, v.length - 2)
     }
-    if (value.indexOf('#end') === 0 && data[0] && data[0].append.if) {
+    v = v.slice(2).trim()
+    if (v.indexOf('#if') === 0) {
+      data.push({
+        value: v,
+        range: [re.lastIndex - match[0].length, re.lastIndex],
+        if :true
+      })
+    }
+
+    if (v.indexOf('#end') === 0 && data[0] && data[0].if) {
       collect.push({
         if: data[0],
-        end: comment
+        end: {
+          range: [re.lastIndex - match[0].length, re.lastIndex],
+          value: v
+        }
       })
       data = []
     }
-  })
+  }
   return collect
 }

lib/loader.js

@@ -1,50 +1,13 @@
-var espree = require('espree')
 var collect = require('./collect')
 var generate = require('./generate')
-
 module.exports = function(source) {
   this.cacheable()
-  if(!this.options['if-loader']){
+  if (!this.options['if-loader']) {
     this.emitError('if-loader config undefined')
   }
-  var ast = espree.parse(source, {
-    range: true,
-    loc: true,
-    comments: true,
-    attachComment: true,
-    tokens: true,
-    tolerant: true,
-    ecmaFeatures: {
-      arrowFunctions: true,
-      blockBindings: true,
-      destructuring: true,
-      regexYFlag: true,
-      regexUFlag: true,
-      templateStrings: true,
-      binaryLiterals: true,
-      octalLiterals: true,
-      unicodeCodePointEscapes: true,
-      defaultParams: true,
-      restParams: true,
-      forOf: true,
-      objectLiteralComputedProperties: true,
-      objectLiteralShorthandMethods: true,
-      objectLiteralShorthandProperties: true,
-      objectLiteralDuplicateProperties: true,
-      generators: true,
-      spread: true,
-      superInFunctions: true,
-      classes: true,
-      newTarget: false,
-      modules: true,
-      jsx: true,
-      globalReturn: true,
-      experimentalObjectRestSpread: true
-    }
-  })
-  var coll = collect(ast.comments)
+  var coll = collect(source)
   if (coll.length) {
-    source = generate.call(this,source, coll)
+    source = generate.call(this, source, coll)
   }
   return source
 }

package.json

@@ -1,7 +1,7 @@
 {
   "name": "if-loader",
   "version": "1.0.0",
-  "description": "js if-loader",
+  "description": "This is a preprocesser for the webpack module bundler. It support the ' if ' directive,similar to C ' #ifdef ' ",
   "main": "index.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
@@ -12,9 +12,6 @@
     "webpack": "^1.12.9"
   },
   "dependencies": {
-    "escodegen": "^1.7.1",
-    "espree": "^2.2.5",
-    "estraverse": "^4.1.1",
     "source-map": "^0.5.3"
   }
 }

webpack.config.js

@@ -10,5 +10,5 @@ module.exports = {
       loader: './index.js'
     }]
   },
-  devtool: 'source-map'
+  // devtool: 'source-map'
 }