insert import on every file

lib/compile.js

@@ -219,25 +219,26 @@ module.exports = function(file, fileName) {
       }
     });
 
+    lines.unshift("import Immutable from 'seamless-immutable';");
 
-    // f
+    // de-dent module methods
     if (state.hasModule) {
       lines = lines.map(function(line) {
-        if (line.match('RS_MODULE_LINE')) {
-          return "import Immutable from 'seamless-immutable'";
-        }
-        else {
-          // if first two lines are blank de-dent module internals
-          if (line[0] && !line[1].trim() && line[1] && !line[1].trim()) {
-            return line.slice(2);
-          } else {
-            return line;
-          }
+        var firstCharEmpty = line[0] && !line[0].trim();
+        var secondCharEmpty = line[1] && !line[1].trim();
+
+        if (firstCharEmpty && secondCharEmpty) {
+          return line.slice(2);
+        } else {
+          return line;
         }
-        return line;
       });
     }
 
+    lines = lines.filter(function(line) {
+      return ! line.match('RS_REMOVE_LINE');
+    })
+
     // return transformed lines
     return lines.join('\n');
 };

lib/transform.js

@@ -268,7 +268,7 @@ module.exports = {
 
         state.hasModule = true;
         var lline;
-        var newLine = line.replace(/^\s*defmodule\s+([\w$]+)\s+do\s*$/, 'RS_MODULE_LINE');
+        var newLine = line.replace(/^\s*defmodule\s+([\w$]+)\s+do\s*$/, 'RS_REMOVE_LINE');
 
         // ** side effect, removes last 'end'
         for (var i=1, n=lines.length; i < n; i++) {

test/examples/aliases.js

@@ -1,3 +1,4 @@
+import Immutable from 'seamless-immutable';
 // this is a single line comment
 
 //#

test/examples/functions.js

@@ -1,3 +1,4 @@
+import Immutable from 'seamless-immutable';
 //  compiles to eq. JavaScript, this example does not
 //  include the module syntax: `defmodule` as that is
 //  a separate transform (see test/examples/module.rs)

test/examples/immutable.js

@@ -1,3 +1,4 @@
+import Immutable from 'seamless-immutable';
 // const arr = Immutable([1, 2, 3]);
 const arr = Immutable([1, 2, 3])
 const arr = Immutable([1, {foo: 1}, [2,[3]] , 3])

test/examples/module.js

@@ -1,4 +1,4 @@
-import Immutable from 'seamless-immutable'
+import Immutable from 'seamless-immutable';
 export function add(a, b) {
   return a + b
 }

test/examples/pipe_operator.js

@@ -1,3 +1,4 @@
+import Immutable from 'seamless-immutable';
 // single line pipes not finished
 const bar = _.chain(Immutable([1, 2, 3])).pipesCall(Enum.uppcase).value();
 

test/examples/sample.js

@@ -1,3 +1,4 @@
+import Immutable from 'seamless-immutable';
 // auto declared constants
   const bar = 2