CLI: Adds --quiet flag

README.md

@@ -452,6 +452,7 @@ Output will be saved with the same name as input SASS file into the current work
     -o, --output               Output directory
     -x, --omit-source-map-url  Omit source map URL comment from output
     -i, --indented-syntax      Treat data from stdin as sass code (versus scss)
+    -q, --quiet                Suppress log output except on error
     -v, --version              Prints version info
     --output-style             CSS output style (nested | expanded | compact | compressed)
     --indent-type              Indent type for output CSS (space | tab)

bin/node-sass

@@ -34,6 +34,7 @@ var cli = meow({
     '  -o, --output               Output directory',
     '  -x, --omit-source-map-url  Omit source map URL comment from output',
     '  -i, --indented-syntax      Treat data from stdin as sass code (versus scss)',
+    '  -q, --quiet                Suppress log output except on error',
     '  -v, --version              Prints version info',
     '  --output-style             CSS output style (nested | expanded | compact | compressed)',
     '  --indent-type              Indent type for output CSS (space | tab)',
@@ -54,6 +55,7 @@ var cli = meow({
   boolean: [
     'indented-syntax',
     'omit-source-map-url',
+    'quiet',
     'recursive',
     'source-map-embed',
     'source-map-contents',
@@ -74,6 +76,7 @@ var cli = meow({
   alias: {
     c: 'source-comments',
     i: 'indented-syntax',
+    q: 'quiet',
     o: 'output',
     r: 'recursive',
     x: 'omit-source-map-url',
@@ -87,6 +90,7 @@ var cli = meow({
     linefeed: 'lf',
     'output-style': 'nested',
     precision: 5,
+    quiet: false,
     recursive: true
   }
 });
@@ -139,7 +143,9 @@ function getEmitter() {
   });
 
   emitter.on('warn', function(data) {
-    console.warn(data);
+    if (!options.quiet) {
+      console.warn(data);
+    }
   });
 
   emitter.on('log', function(data) {

test/cli.js

@@ -39,6 +39,20 @@ describe('cli', function() {
       src.pipe(bin.stdin);
     });
 
+    it('should compile with the --quiet option', function(done) {
+      var src = fs.createReadStream(fixture('simple/index.scss'));
+      var expected = read(fixture('simple/expected.css'), 'utf8').trim();
+      var bin = spawn(cli, ['--quiet']);
+
+      bin.stdout.setEncoding('utf8');
+      bin.stdout.once('data', function(data) {
+        assert.equal(data.trim(), expected.replace(/\r\n/g, '\n'));
+        done();
+      });
+
+      src.pipe(bin.stdin);
+    });
+
     it('should compile with the --output-style option', function(done) {
       var src = fs.createReadStream(fixture('compressed/index.scss'));
       var expected = read(fixture('compressed/expected.css'), 'utf8').trim();
@@ -150,6 +164,45 @@ describe('cli', function() {
       });
     });
 
+    it('should compile silently using the --quiet option', function(done) {
+      process.chdir(fixture('simple'));
+
+      var src = fixture('simple/index.scss');
+      var dest = fixture('simple/index.css');
+      var bin = spawn(cli, [src, dest, '--quiet']);
+      var didEmit = false;
+
+      bin.stderr.once('data', function() {
+        didEmit = true;
+      });
+
+      bin.once('close', function() {
+        assert.equal(didEmit, false);
+        fs.unlinkSync(dest);
+        process.chdir(__dirname);
+        done();
+      });
+    });
+
+    it('should still report errors with the --quiet option', function(done) {
+      process.chdir(fixture('invalid'));
+
+      var src = fixture('invalid/index.scss');
+      var dest = fixture('invalid/index.css');
+      var bin = spawn(cli, [src, dest, '--quiet']);
+      var didEmit = false;
+
+      bin.stderr.once('data', function() {
+        didEmit = true;
+      });
+
+      bin.once('close', function() {
+        assert.equal(didEmit, true);
+        process.chdir(__dirname);
+        done();
+      });
+    });
+
     it('should not exit with the --watch option', function(done) {
       var src = fixture('simple/index.scss');
       var bin = spawn(cli, [src, '--watch']);
@@ -188,6 +241,28 @@ describe('cli', function() {
       }, 500);
     });
 
+    it('should emit nothing on file change when using --watch and --quiet options', function(done) {
+      var src = fixture('simple/tmp.scss');
+      var didEmit = false;
+      fs.writeFileSync(src, '');
+
+      var bin = spawn(cli, ['--watch', '--quiet', src]);
+
+      bin.stderr.setEncoding('utf8');
+      bin.stderr.once('data', function() {
+        didEmit = true;
+      });
+
+      setTimeout(function() {
+        fs.appendFileSync(src, 'body {}');
+        setTimeout(function() {
+          assert.equal(didEmit, false);
+          done();
+          fs.unlinkSync(src);
+        }, 200);
+      }, 500);
+    });
+
     it('should render all watched files', function(done) {
       var src = fixture('simple/bar.scss');
 

test/fixtures/invalid/index.scss

+body {
+  background-color: $green;
+}