reading file from stdin

lib/cli.js

@@ -2,9 +2,10 @@ var watch = require('node-watch'),
     render = require('./render'),
     path = require('path'),
     Emitter = require('events').EventEmitter,
-    cwd = process.cwd();
+    cwd = process.cwd(),
+    stdin = require('get-stdin');
 
-var optimist = require('optimist')
+var yargs = require('yargs')
   .usage('Compile .scss files with node-sass.\nUsage: $0 [options] <input.scss> [<output.css>]')
   .options('output-style', {
     describe: 'CSS output style (nested|expanded|compact|compressed)',
@@ -53,8 +54,8 @@ var optimist = require('optimist')
     alias: 'help'
   })
   .check(function(argv){
+    if (!argv.stdout && argv.o === undefined && argv._.length === 0) { return false; }
     if (argv.help) { return true; }
-    if (argv._.length < 1) { return false; }
   });
 
 // throttle function, used so when multiple files change at the same time
@@ -76,10 +77,10 @@ function isSassFile(file) {
 }
 
 exports = module.exports = function(args) {
-  var argv = optimist.parse(args);
+  var argv = yargs.parse(args);
 
   if (argv.help) {
-    optimist.showHelp();
+    yargs.showHelp();
     process.exit(0);
     return;
   }
@@ -168,10 +169,17 @@ exports = module.exports = function(args) {
     throttledRender();
 
   } else {
+    if (inFile === undefined && args.length > 0) {
+      stdin(function(data){
+        options.data = data.toString().trim();
         render(options, emitter);
+      });
+    } else {
+      render(options, emitter);
+    }
   }
 
   return emitter;
 };
 
-exports.optimist = optimist;
+exports.yargs = yargs;

lib/render.js

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

package.json

@@ -44,10 +44,10 @@
     "nan": "~1.3.0",
     "node-watch": "~0.3.4",
     "object-assign": "^0.3.1",
-    "optimist": "~0.6.1",
     "shelljs": "~0.2.6",
     "sinon": "~1.9.1",
-    "node-sass-middleware": "~0.2.0"
+    "node-sass-middleware": "~0.2.0",
+    "yargs": "~1.3.1"
   },
   "devDependencies": {
     "coveralls": "^2.11.1",

test/cli.js

@@ -215,4 +215,14 @@ describe('cli', function() {
     });
   });
 
+  it('should compile with input from stdin', function(done){
+    var emitter = cli(['--stdout']);
+    emitter.on('error', done);
+    emitter.on('log', function(css){
+      done(assert.equal(css, '#navbar ul {\n  list-style-type: none; }\n'));
+    });
+    process.stdin.emit('data', '#navbar ul{list-style-type:none;}');
+    process.stdin.emit('end');
+  });
+
 });