Importer: Adds support for CLI usage.

bin/node-sass

@@ -5,7 +5,8 @@ var Emitter = require('events').EventEmitter,
     meow = require('meow'),
     replaceExt = require('replace-ext'),
     stdin = require('get-stdin'),
-    render = require('../lib/render');
+    render = require('../lib/render'),
+    fs = require('fs');
 
 /**
  * Initialize CLI
@@ -39,6 +40,7 @@ var cli = meow({
     '  --image-path               Path to prepend when using the `image-url()` helper',
     '  --precision                The amount of precision allowed in decimal numbers',
     '  --stdout                   Print the resulting CSS to stdout',
+    '  --importer                 Path to custom importer',
     '  --help                     Print usage info'
   ].join('\n')
 }, {
@@ -107,6 +109,10 @@ function getEmitter() {
     console.log(data);
   });
 
+  emitter.on('done', function(){
+    process.exit(0);
+  });
+
   return emitter;
 }
 
@@ -204,6 +210,15 @@ function run(options, emitter) {
     }
   }
 
+  if (options.importer) {
+    if (fs.existsSync(options.importer)) {
+      options.importer = require(options.importer);
+    } else {
+      console.error('Could not locate importer.');
+      process.exit(1);
+    }
+  }
+
   if (options.watch) {
     watch(options, emitter);
   } else {

lib/render.js

@@ -22,7 +22,8 @@ module.exports = function(options, emitter) {
     sourceComments: options.sourceComments,
     sourceMapEmbed: options.sourceMapEmbed,
     sourceMapContents: options.sourceMapContents,
-    sourceMap: options.sourceMap
+    sourceMap: options.sourceMap,
+    importer: options.importer
   };
 
   if (options.src) {

test/cli.js

@@ -223,4 +223,106 @@ describe('cli', function() {
       });
     });
   });
+
+  describe('importer', function() {
+    var dest = fixture('include-files/index.css');
+    var src = fixture('include-files/index.scss');
+    var expected = read(fixture('include-files/expected-importer.css'), 'utf8').trim().replace(/\r\n/g, '\n');
+
+    it('should override imports and fire callback with file and contents', function(done) {
+      var bin = spawn(cli, [
+        src, '--output', path.dirname(dest),
+        '--importer', fixture('extras/my_custom_importer_file_and_data_cb.js')
+      ]);
+
+      bin.on('close', function () {
+        assert.equal(read(dest, 'utf8').trim(), expected);
+        fs.unlinkSync(dest);
+        done();
+      });
+    });
+
+    it('should override imports and fire callback with file', function(done) {
+      var bin = spawn(cli, [
+        src, '--output', path.dirname(dest),
+        '--importer', fixture('extras/my_custom_importer_file_cb.js')
+      ]);
+
+      bin.on('close', function () {
+        if (fs.existsSync(dest)) {
+          assert.equal(read(dest, 'utf8').trim(), '');
+          fs.unlinkSync(dest);
+        }
+
+        done();
+      });
+    });
+
+    it('should override imports and fire callback with data', function(done) {
+      var bin = spawn(cli, [
+        src, '--output', path.dirname(dest),
+        '--importer', fixture('extras/my_custom_importer_data_cb.js')
+      ]);
+
+      bin.on('close', function () {
+        assert.equal(read(dest, 'utf8').trim(), expected);
+        fs.unlinkSync(dest);
+        done();
+      });
+    });
+
+    it('should override imports and return file and contents', function(done) {
+      var bin = spawn(cli, [
+        src, '--output', path.dirname(dest),
+        '--importer', fixture('extras/my_custom_importer_file_and_data.js')
+      ]);
+
+      bin.on('close', function () {
+        assert.equal(read(dest, 'utf8').trim(), expected);
+        fs.unlinkSync(dest);
+        done();
+      });
+    });
+
+    it('should override imports and return file', function(done) {
+      var bin = spawn(cli, [
+        src, '--output', path.dirname(dest),
+        '--importer', fixture('extras/my_custom_importer_file.js')
+      ]);
+
+      bin.on('close', function () {
+        if (fs.existsSync(dest)) {
+          assert.equal(read(dest, 'utf8').trim(), '');
+          fs.unlinkSync(dest);
+        }
+
+        done();
+      });
+    });
+
+    it('should override imports and return data', function(done) {
+      var bin = spawn(cli, [
+        src, '--output', path.dirname(dest),
+        '--importer', fixture('extras/my_custom_importer_data.js')
+      ]);
+
+      bin.on('close', function () {
+        assert.equal(read(dest, 'utf8').trim(), expected);
+        fs.unlinkSync(dest);
+        done();
+      });
+    });
+
+    it('should return error on for invalid importer file path', function(done) {
+      var bin = spawn(cli, [
+        src, '--output', path.dirname(dest),
+        '--importer', fixture('non/existing/path')
+      ]);
+
+      bin.on('close', function (code) {
+        assert(code !== 0);
+        done();
+      });
+    });
+  });
 });

test/fixtures/extras/my_custom_importer_data.js

+module.exports = function() {
+  return {
+      contents: 'div {color: yellow;}'
+  };
+};

test/fixtures/extras/my_custom_importer_data_cb.js

+module.exports = function(file, prev, done) {
+  done({
+      contents: 'div {color: yellow;}'
+  });
+};

test/fixtures/extras/my_custom_importer_file.js

+var path = require('path');
+
+module.exports = function(file) {console.log('>>>>>>>>>>');console.log(path.resolve(path.join(process.cwd(), 'test/fixtures/include-files/', file + (path.extname(file) ? '' : '.scss'))));
+  return {
+      file: path.resolve(path.join(process.cwd(), 'test/fixtures/include-files/', file + (path.extname(file) ? '' : '.scss')))
+  };
+};

test/fixtures/extras/my_custom_importer_file_and_data.js

+module.exports = function() {
+  return {
+      file: '/some/random/path/file.scss',
+      contents: 'div {color: yellow;}'
+  };
+};

test/fixtures/extras/my_custom_importer_file_and_data_cb.js

+module.exports = function(file, prev, done) {
+  done({
+      file: '/some/random/path/file.scss',
+      contents: 'div {color: yellow;}'
+  });
+};

test/fixtures/extras/my_custom_importer_file_cb.js

+var path = require('path');
+
+module.exports = function(file, /* jshint unused:false */ prev, done) {
+  done({
+      file: path.resolve(path.join(process.cwd(), 'test/fixtures/include-files/', file + (path.extname(file) ? '' : '.scss')))
+  });
+};

test/fixtures/include-files/expected-importer.css

+div {
+  color: yellow; }
+
+div {
+  color: yellow; }