1. module grunt-contrib-cssmin
   1. function grunt-contrib-cssmin (grunt)

module grunt-contrib-cssmin

function grunt-contrib-cssmin (grunt)

• description and source-code

  grunt-contrib-cssmin = function (grunt) {
    var getAvailableFiles = function (filesArray) {
      return filesArray.filter(function (filepath) {
        if (!grunt.file.exists(filepath)) {
          grunt.log.warn('Source file ' + chalk.cyan(filepath) + ' not found');
          return false;
        }
        return true;
      });
    };
  
    grunt.registerMultiTask('cssmin', 'Minify CSS', function () {
      var created = {
        maps: 0,
        files: 0
      };
      var size = {
        before: 0,
        after: 0
      };
  
      this.files.forEach(function (file) {
        var options = this.options({
          rebase: false,
          report: 'min',
          sourceMap: false
        });
  
        var availableFiles = getAvailableFiles(file.src);
        var compiled = '';
  
        options.target = file.dest;
        options.relativeTo = path.dirname(availableFiles[0] || '');
  
        try {
          compiled = new CleanCSS(options).minify(availableFiles);
  
          if (compiled.errors.length) {
            grunt.warn(compiled.errors.toString());
            return;
          }
  
          if (compiled.warnings.length) {
            grunt.log.error(compiled.warnings.toString());
          }
  
          if (options.debug) {
            grunt.log.writeln(util.format(compiled.stats));
          }
        } catch (err) {
          grunt.log.error(err);
          grunt.warn('CSS minification failed at ' + availableFiles + '.');
        }
  
        var compiledCssString = compiled.styles;
  
        var unCompiledCssString = availableFiles.map(function (file) {
          return grunt.file.read(file);
        }).join('');
  
        size.before += unCompiledCssString.length;
  
        if (options.sourceMap) {
          compiledCssString += '\n' + '/*# sourceMappingURL=' + path.basename(file.dest) + '.map */';
          grunt.file.write(file.dest + '.map', compiled.sourceMap.toString());
          created.maps++;
          grunt.verbose.writeln('File ' + chalk.cyan(file.dest + '.map') + ' created');
        }
  
        grunt.file.write(file.dest, compiledCssString);
        created.files++;
        size.after += compiledCssString.length;
        grunt.verbose.writeln('File ' + chalk.cyan(file.dest) + ' created ' + chalk.dim(maxmin(unCompiledCssString, compiledCssString
  , options.report === 'gzip')));
  
      }, this);
  
      if (created.maps > 0) {
        grunt.log.ok(created.maps + ' source' + grunt.util.pluralize(this.files.length, 'map/maps') + ' created.');
      }
  
      if (created.files > 0) {
        grunt.log.ok(created.files + ' ' + grunt.util.pluralize(this.files.length, 'file/files') + ' created. ' + chalk.dim(maxmin
  (size.before, size.after)));
      } else {
        grunt.log.warn('No files created.');
      }
    });
  }

• example usage

  n/a