js-pipeline/lib/index.js

roots extension for handling js production builds

// Generated by CoffeeScript 1.9.1
(function() {
  var RootsUtil, UglifyJS, _, crypto, fs, minimatch, path, yaml;

  fs = require('fs');

  path = require('path');

  _ = require('lodash');

  minimatch = require('minimatch');

  UglifyJS = require('uglify-js');

  crypto = require('crypto');

  RootsUtil = require('roots-util');

  yaml = require('js-yaml');

  module.exports = function(opts) {
    var JSPipeline;
    opts = _.defaults(opts, {
      files: ['assets/js/**'],
      manifest: false,
      out: false,
      minify: false,
      hash: false,
      opts: {}
    });
    opts.opts.fromString = true;
    opts.opts.comments = true;
    opts.files = Array.prototype.concat(opts.files);
    return JSPipeline = (function() {

      /**
       * Sets up the custom category and view function.
       * The view function grabs either the single output path or collects
       * all non-ignored output paths for the input files and returns them
       * as html link tags.
       *
       * @param  {Function} @roots - Roots class instance
       */
      var get_output_paths, load_manifest_file;

      function JSPipeline(roots) {
        var base;
        this.roots = roots;
        this.category = 'js-pipeline';
        this.file_map = {};
        this.util = new RootsUtil(this.roots);
        if (opts.manifest) {
          this.roots.config.ignores.push(opts.manifest);
          this.manifest = load_manifest_file.call(this, opts.manifest);
        }
        this.files = this.manifest || opts.files;
        if ((base = this.roots.config).locals == null) {
          base.locals = {};
        }
        this.roots.config.locals.js = (function(_this) {
          return function(prefix) {
            var i, len, matcher, paths, ref;
            if (prefix == null) {
              prefix = '';
            }
            paths = [];
            if (opts.out) {
              paths.push("" + prefix + opts.out);
            } else {
              ref = _this.files;
              for (i = 0, len = ref.length; i < len; i++) {
                matcher = ref[i];
                paths = paths.concat(get_output_paths.call(_this, matcher, prefix));
              }
            }
            return paths.map(function(p) {
              return "<script src='" + p + "'></script>";
            }).join("\n");
          };
        })(this);
      }


      /**
       * Minimatch runs against each path, quick and easy.
       */

      JSPipeline.prototype.fs = function() {
        return {
          extract: true,
          detect: (function(_this) {
            return function(f) {
              return _.any(_this.files, minimatch.bind(_this, f.relative));
            };
          })(this)
        };
      };


      /**
       * After compile, if concat is happening, grab the contents and save them
       * away, then prevent write.
       */

      JSPipeline.prototype.compile_hooks = function() {
        return {
          write: function() {
            return !opts.out;
          },
          after_file: (function(_this) {
            return function(ctx) {
              if (opts.out) {
                return _this.file_map[ctx.file.relative] = ctx.content;
              }
            };
          })(this)
        };
      };


      /**
       * Write the output file if necessary.
       */

      JSPipeline.prototype.category_hooks = function() {
        return {
          after: (function(_this) {
            return function(ctx) {
              var all_contents, content, file, hash, i, len, matcher, ref, ref1, res;
              if (!opts.out) {
                return;
              }
              all_contents = '';
              ref = _this.files;
              for (i = 0, len = ref.length; i < len; i++) {
                matcher = ref[i];
                ref1 = _this.file_map;
                for (file in ref1) {
                  content = ref1[file];
                  if (minimatch(file, matcher)) {
                    all_contents += content + "\n";
                  }
                }
              }
              if (opts.minify) {
                all_contents = UglifyJS.minify(all_contents, opts.opts).code;
              }
              if (opts.hash) {
                hash = crypto.createHash('md5').update(all_contents, 'utf8');
                res = opts.out.split('.');
                res.splice(-1, 0, hash.digest('hex'));
                opts.out = res.join('.');
              }
              return _this.util.write(opts.out, all_contents);
            };
          })(this)
        };
      };

      load_manifest_file = function(f) {
        var res;
        res = yaml.safeLoad(fs.readFileSync(path.join(this.roots.root, f), 'utf8'));
        return res.map(function(m) {
          return path.join(path.dirname(f), m);
        });
      };

      get_output_paths = function(files, prefix) {
        return this.util.files(files).map((function(_this) {
          return function(f) {
            var filePath;
            filePath = _this.util.output_path(f.relative).relative;
            return path.join(prefix, filePath.replace(path.extname(filePath), '.js'));
          };
        })(this));
      };

      return JSPipeline;

    })();
  };

}).call(this);