angularjs – Yeoman Angular app,grunt watch .less files

首先,我安装了grunt-contrib-less模块??,并在我的样式文件夹而不是bower_components中创建了另一个bootstrap less文件夹(谢谢Mingos！).
然后我更新了Gruntfile,这就是它现在的样子：

'use strict';

// # Globbing
// for performance reasons we're only matching one level down:
// 'test/spec/{,*/}*.js'
// use this if you want to recursively match all subfolders:
// 'test/spec/**/*.js'

module.exports = function (grunt) {

  // Load grunt tasks automatically
  require('load-grunt-tasks')(grunt);

  // Time how long tasks take. Can help when optimizing build times
  require('time-grunt')(grunt);

  // Define the configuration for all the tasks
  grunt.initConfig({

    // Project settings
    yeoman: {
      // configurable paths
      app: require('./bower.json').appPath || 'app',dist: 'dist'
    },less: {
        development: {
            options: {
                compress: true,yuicompress: true,optimization: 2
            },files: {
                // target.css file: source.less file
                "app/styles/bootstrap.css": "app/styles/less/bootstrap.less"
            }
        }
    },// Watches files for changes and runs tasks based on the changed files
    watch: {
      bower: {
        files: ['bower.json'],'<%= yeoman.app %>/styles/less/{,*/}*.less'],'autoprefixer','less']
      },// The actual grunt server settings
    connect: {
      options: {
        port: 9000,// Change this to '0.0.0.0' to access the server from outside.
        hostname: 'localhost',livereload: 35729
      },livereload: {
        options: {
          open: true,base: [
            '.tmp','<%= yeoman.app %>'
          ]
        }
      },test: {
        options: {
          port: 9001,'test',dist: {
        options: {
          base: '<%= yeoman.dist %>'
        }
      }
    },// Make sure code styles are up to par and there are no obvious mistakes
    jshint: {
      options: {
        jshintrc: '.jshintrc',reporter: require('jshint-stylish')
      },all: [
        'Gruntfile.js','<%= yeoman.app %>/scripts/{,*/}*.js'
      ],test: {
        options: {
          jshintrc: 'test/.jshintrc'
        },src: ['test/spec/{,*/}*.js']
      }
    },// Empties folders to start fresh
    clean: {
      dist: {
        files: [{
          dot: true,src: [
            '.tmp','<%= yeoman.dist %>/*','!<%= yeoman.dist %>/.git*'
          ]
        }]
      },server: '.tmp'
    },// Add vendor prefixed styles
    autoprefixer: {
      options: {
        browsers: ['last 1 version']
      },dist: {
        files: [{
          expand: true,cwd: '.tmp/styles/',src: '{,dest: '.tmp/styles/'
        }]
      }
    },// Automatically inject Bower components into the app
    bowerInstall: {
      app: {
        src: ['<%= yeoman.app %>/index.html'],ignorePath: '<%= yeoman.app %>/'
      }
    },// Renames files for browser caching purposes
    rev: {
      dist: {
        files: {
          src: [
            '<%= yeoman.dist %>/scripts/{,*/}*.js','<%= yeoman.dist %>/styles/{,'<%= yeoman.dist %>/images/{,svg}','<%= yeoman.dist %>/styles/fonts/*'
          ]
        }
      }
    },// Reads HTML for usemin blocks to enable smart builds that automatically
    // concat,minify and revision files. Creates configurations in memory so
    // additional tasks can operate on them
    useminPrepare: {
      html: '<%= yeoman.app %>/index.html',options: {
        dest: '<%= yeoman.dist %>',flow: {
          html: {
            steps: {
              js: ['concat','uglifyjs'],css: ['cssmin']
            },post: {}
          }
        }
      }
    },// Performs rewrites based on rev and the useminPrepare configuration
    usemin: {
      html: ['<%= yeoman.dist %>/{,*/}*.html'],css: ['<%= yeoman.dist %>/styles/{,options: {
        assetsDirs: ['<%= yeoman.dist %>']
      }
    },// The following *-min tasks produce minified files in the dist folder
    cssmin: {
      options: {
        root: '<%= yeoman.app %>'
      }
    },imagemin: {
      dist: {
        files: [{
          expand: true,cwd: '<%= yeoman.app %>/images',gif}',dest: '<%= yeoman.dist %>/images'
        }]
      }
    },svgmin: {
      dist: {
        files: [{
          expand: true,*/}*.svg',htmlmin: {
      dist: {
        options: {
          collapseWhitespace: true,collapseBooleanAttributes: true,removeCommentsFromCDATA: true,removeOptionalTags: true
        },files: [{
          expand: true,cwd: '<%= yeoman.dist %>',src: ['*.html','views/{,dest: '<%= yeoman.dist %>'
        }]
      }
    },// ngmin tries to make the code safe for minification automatically by
    // using the Angular long form for dependency injection. It doesn't work on
    // things like resolve or inject so those have to be done manually.
    ngmin: {
      dist: {
        files: [{
          expand: true,cwd: '.tmp/concat/scripts',src: '*.js',dest: '.tmp/concat/scripts'
        }]
      }
    },// Replace Google CDN references
    cdnify: {
      dist: {
        html: ['<%= yeoman.dist %>/*.html']
      }
    },// Copies remaining files to places other tasks can use
    copy: {
      dist: {
        files: [{
          expand: true,dot: true,cwd: '<%= yeoman.app %>',dest: '<%= yeoman.dist %>',src: [
            '*.{ico,png,txt}','.htaccess','*.html','images/{,*/}*.{webp}','fonts/*'
          ]
        },{
          expand: true,cwd: '.tmp/images',dest: '<%= yeoman.dist %>/images',src: ['generated/*']
        }]
      },styles: {
        expand: true,cwd: '<%= yeoman.app %>/styles',dest: '.tmp/styles/',*/}*.css'
      }
    },// Run some tasks in parallel to speed up the build process
    concurrent: {
      server: [
        'copy:styles'
      ],test: [
        'copy:styles'
      ],dist: [
        'copy:styles','imagemin','svgmin'
      ]
    },// By default,your `index.html`'s <!-- Usemin block --> will take care of
    // minification. These next options are pre-configured if you do not wish
    // to use the Usemin blocks.
    // cssmin: {
    //   dist: {
    //     files: {
    //       '<%= yeoman.dist %>/styles/main.css': [
    //         '.tmp/styles/{,//         '<%= yeoman.app %>/styles/{,*/}*.css'
    //       ]
    //     }
    //   }
    // },// uglify: {
    //   dist: {
    //     files: {
    //       '<%= yeoman.dist %>/scripts/scripts.js': [
    //         '<%= yeoman.dist %>/scripts/scripts.js'
    //       ]
    //     }
    //   }
    // },// concat: {
    //   dist: {}
    // },// Test settings
    karma: {
      unit: {
        configFile: 'karma.conf.js',singleRun: true
      }
    }
  });

  grunt.loadNpmTasks('grunt-contrib-less');
  grunt.loadNpmTasks('grunt-contrib-watch');

  grunt.registerTask('serve',function (target) {
    if (target === 'dist') {
      return grunt.task.run(['build','connect:dist:keepalive']);
    }

    grunt.task.run([
      'clean:server','bowerInstall','concurrent:server','connect:livereload','watch'
    ]);
  });

  grunt.registerTask('server',function (target) {
    grunt.log.warn('The `server` task has been deprecated. Use `grunt serve` to start a server.');
    grunt.task.run(['serve:' + target]);
  });

  grunt.registerTask('test',[
    'clean:server','concurrent:test','connect:test','karma'
  ]);

  grunt.registerTask('build',[
    'clean:dist','useminPrepare','concurrent:dist','concat','ngmin','copy:dist','cdnify','cssmin','uglify','rev','usemin','htmlmin'
  ]);

  grunt.registerTask('default',[
    'newer:jshint','build'
  ]);
};

如你所见,这在我的styles文件夹中创建了一个新的bootstrap.css,然后我从我的index.html链接:)