gulp.task('sass', ['del'], function() {
  return gulp.src('./sassDir/style/*.scss')
    .pipe(compass({
      config_file: path.join(process.cwd(), 'config.rb'),
      project: path.join(process.cwd(), '/sassDir'),
      css: './',
      sass: 'style',
    }))
    .on('end', function() {
      console.log('compass 编译完成')
    })
});

实际执行的命令

/home/suntopo/.rvm/gems/ruby-2.3.0/bin/compass
[ 'compile',
  '/home/suntopo/Desktop/gulp-compass-demo/sassDir',
  '/home/suntopo/Desktop/gulp-compass-demo/sassDir/style/haha.scss',
  '-c',
  '/home/suntopo/Desktop/gulp-compass-demo/config.rb',
  '--relative-assets',
  '--css-dir',
  './',
  '--sass-dir',
  'sass' ]

compass的命令格式

Usage: compass compile [path/to/project] [path/to/project/src/file.sass ...] [options]

疑问在于compile的第二参数[path/to/project/src/file.sass ...], '/home/suntopo/Desktop/gulp-compass-demo/sassDir/style/haha.scss', 看参数感觉像说sass的源，但是实际上只是sass源中的最后一个sass文件，那么这个参数是干哈的呢