feature(importer): adding options.importer to pass data to importer c…

…allback - #43

Readme.md

@@ -162,6 +162,10 @@ sass.options({
   // String to be used to for line feeds
   linefeed: '\n',
 
+  // data passed through to the importer callback
+  // must be serializable to JSON
+  importer: {},
+
   // Path to source map file
   // Enables the source map generating
   // Used to create sourceMappingUrl
@@ -262,6 +266,7 @@ sass.importer(function(request, done) {
   // (string) request.previous absolute path of previously imported file ("stdin" if first)
   // (string) request.resolved currentPath resolved against previousPath
   // (string) request.path absolute path in file system, null if not found
+  // (mixed)  request.options the value of options.importer
   // -------------------------------
   // (object) result
   // (string) result.path the absolute path to load from file system

src/sass.api.js

@@ -62,6 +62,13 @@ var Sass = {
     Object.keys(options).forEach(function(key) {
       var _type = Sass._optionTypes[key];
 
+      if (key === 'importer') {
+        // allow passing compile() time options
+        // to the importer callback
+        Sass._options[key] = options[key];
+        return;
+      }
+
       // no need to import crap
       if (!_type) {
         throw new Error('Unknown option "' + key + '"');

src/sass.importer.js

@@ -27,6 +27,7 @@ var Importer = {
         previous: previous,
         resolved: resolved,
         path: found,
+        options: Sass._options.importer || null,
       }, done);
     } catch(e) {
       // allow emscripten to resume libsass,

test/test.importer.js

@@ -203,4 +203,75 @@ describe('importer', function() {
     });
   });
 
+  it('should accept options', function(done) {
+    var source = '@import "testfile";';
+    var expected = '.hello{content:"world"}\n';
+
+    Sass.importer(function(request, done) {
+      done({
+        content: request.options.gustav,
+      });
+    });
+
+    Sass.options('defaults');
+    Sass.options({ style: Sass.style.compressed });
+
+    var options = {
+      importer: {
+        gustav: '.hello { content: "world" }',
+      },
+    };
+
+    Sass.compile(source, options, function(result) {
+      expect(result.text).to.equal(expected);
+      done();
+    });
+  });
+
+  it('should use correct options', function(done) {
+    var source = '@import "testfile";';
+    var alpha = '.alpha{content:"alpha"}\n';
+    var bravo = '.bravo{content:"bravo"}\n';
+    var charlie = '.charlie{content:"charlie"}\n';
+
+    var remaining = 4;
+    var _done = function() {
+      remaining--;
+      if (!remaining) {
+        done();
+      }
+    };
+
+    Sass.options('defaults');
+    Sass.options({ style: Sass.style.compressed });
+
+    Sass.importer(function(request, done) {
+      done({
+        content: request.options,
+      });
+    });
+
+    Sass.options({ importer: '.alpha { content: "alpha"; }' });
+    Sass.compile(source, function(result) {
+      expect(result.text).to.equal(alpha, 'alpha');
+      _done();
+    });
+
+    Sass.options({ importer: '.bravo { content: "bravo"; }' });
+    Sass.compile(source, function(result) {
+      expect(result.text).to.equal(bravo, 'first bravo');
+      _done();
+    });
+
+    Sass.compile(source, { importer: '.charlie { content: "charlie"; }' }, function(result) {
+      expect(result.text).to.equal(charlie, 'charlie');
+      _done();
+    });
+
+    Sass.compile(source, function(result) {
+      expect(result.text).to.equal(bravo, 'second bravo');
+      _done();
+    });
+  });
+
 });