Use relative path to a file in source map (fixes #7)

HISTORY.md

@@ -1,4 +1,8 @@
-## 1.1.0 (Spetember 10, 2017)
+## next
+
+- Changed used path to a file in generated source map to relative path (#7)
+
+## 1.1.0 (September 10, 2017)
 
 - Bumped `CSSO` to `3.2.0`
 - Added `--watch` option to run CLI in watch mode (@rijkvanzanten, #4)

index.js

@@ -254,6 +254,7 @@ function minifyStream(options) {
     readFromStream(inputStream, function(source) {
         var time = process.hrtime();
         var mem = process.memoryUsage().heapUsed;
+        var relInputFilename = path.relative(process.cwd(), options.inputFile);
         var sourceMap = resolveSourceMap(source, options.inputMap, options.map, options.inputFile, options.outputFile);
         var sourceMapAnnotation = '';
         var result;
@@ -262,7 +263,7 @@ function minifyStream(options) {
         try {
             var minifyFunc = options.declarationList ? csso.minifyBlock : csso.minify;
             result = minifyFunc(source, {
-                filename: options.inputFile,
+                filename: relInputFilename,
                 sourceMap: sourceMap.output,
                 usage: options.usageData,
                 restructure: options.restructure,
@@ -294,7 +295,7 @@ function minifyStream(options) {
             if (sourceMap.input) {
                 result.map.applySourceMap(
                     new SourceMapConsumer(sourceMap.input),
-                    options.inputFile
+                    relInputFilename
                 );
             }
 
@@ -328,7 +329,7 @@ function minifyStream(options) {
         if (options.statistics) {
             var timeDiff = process.hrtime(time);
             showStat(
-                path.relative(process.cwd(), options.inputFile),
+                relInputFilename,
                 source.length,
                 result.css.length,
                 sourceMap.inputFile,

test/basic.js

@@ -60,3 +60,13 @@ it('should read from file', function() {
     return run(__dirname + '/fixture/1.css')
         .output(fs.readFileSync(__dirname + '/fixture/1.min.css', 'utf-8') + '\n');
 });
+
+it('should use relative paths in source map', function() {
+    return run(__dirname + '/fixture/1.css', '--map', 'inline')
+        .output(function(res) {
+            var expected = fs.readFileSync(__dirname + '/fixture/1.min.css.map', 'utf-8');
+            var actual = Buffer.from(String(res).match(/data:application\/json;base64,(.+)/)[1], 'base64').toString('utf-8') + '\n';
+
+            assert.equal(actual, expected);
+        });
+});