Added the --image-path option to the cli interface.

lib/cli.js

@@ -21,6 +21,10 @@ var optimist = require('optimist')
     describe: 'Path to look for @import-ed files',
     'default': cwd
   })
+  .options('image-path', {
+    describe: 'Path to prepend when using the image-url(…) helper',
+    'default': ''
+  })
   .options('watch', {
     describe: 'Watch a directory or file',
     alias: 'w'
@@ -97,6 +101,9 @@ exports = module.exports = function(args) {
     options.includePaths = [options.includePaths];
   }
 
+  // include the image path.
+  options.imagePath = argv['image-path'];
+
   // if it's an array, make it a string
   options.outputStyle = argv['output-style'];
   if (Array.isArray(options.outputStyle)) {

lib/render.js

@@ -7,6 +7,7 @@ function render(options, emitter) {
   sass.render({
     file: options.inFile,
     includePaths: options.includePaths,
+    imagePath: options.imagePath,
     outputStyle: options.outputStyle,
     sourceComments: options.sourceComments,
     sourceMap: options.sourceMap,

test/cli.js

@@ -24,6 +24,9 @@ var expectedSampleNoComments = '#navbar {\n\
   #navbar li a {\n\
     font-weight: bold; }\n';
 
+var expectedSampleCustomImagePath = 'body {\n\
+  background-image: url("/path/to/images/image.png"); }\n';
+
 describe('cli', function() {
   it('should print help when run with no arguments', function(done) {
     exec('node ' + cliPath, function(err, stdout, stderr) {
@@ -90,6 +93,15 @@ describe('cli', function() {
     });
   });
 
+  it('should compile with the --image-path option', function(done){
+    var emitter = cli(['--image-path', '/path/to/images', path.join(__dirname, 'image_path.scss')]);
+    emitter.on('error', done);
+    emitter.on('write', function(err, file, css){
+      assert.equal(css, expectedSampleCustomImagePath);
+      fs.unlink(file, done);
+    });
+  });
+
   it('should write the output to the file specified with the --output option', function(done){
     var resultPath = path.join(__dirname, '../output.css');
     var emitter = cli(['--output', resultPath, path.join(__dirname, 'sample.scss')]);