gistfile1.js

var XXHash = require('xxhash'),
    seed = 1, // Seed doesn't matter because we aren't using the hash cryptographically
    path = require('path')

exports.utils = function(grunt, options) {
  return {

    getHash: function(file) {
      return XXHash.hash(grunt.file.read(file, {
        encoding: null
      }), seed);
    },

    getCache: function(file) {
      var cacheFile = this.getCacheFile(file);
      if(grunt.file.exists(cacheFile)) {
        return grunt.file.read(cacheFile);
      } else {
        return 0;
      }
    },

    writeCache: function(file, hash) {
      grunt.file.write(this.getCacheFile(file), hash);
    },

    getCacheFile: function(file) {
      return path.join(__dirname,'..',options.cacheDir,path.relative(options.baseDir, file + '.cache'));
    },

    parseBase: function(filepath) {
      return path.join(options.baseDir, filepath);
    },

    checkFile: function (filepath) {
      var hash = this.getHash(filepath);
      if (hash != this.getCache(filepath)) {
        this.writeCache(filepath, hash);
        grunt.log.writeln('File ' + filepath.cyan + ' updated. Processing...');
        return true;
      }
      grunt.log.debug(filepath + ' has not been updated.');
      return false;
    },

    escapeRegex: function(s) {
      return s.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
    }
  };
};




//==========================================



var XXHash = require('xxhash'),
    seed = 1, // Seed doesn't matter because we aren't using the hash cryptographically
    path = require('path')

exports.utils = function(grunt, options) {

    var getHash = function(file) {
            return XXHash.hash(grunt.file.read(file, {
                encoding: null
            }), seed);
        },
        getCache = function(file) {
            var cacheFile = getCacheFile(file);
            if(grunt.file.exists(cacheFile)) {
                return grunt.file.read(cacheFile);
            } else {
                return 0;
            }
        },
        writeCache = function(file, hash) {
            grunt.file.write(getCacheFile(file), hash);
        },
        getCacheFile = function(file) {
            return path.join(__dirname,'..',options.cacheDir,path.relative(options.baseDir, file + '.cache'));
        },
        parseBase = function(filepath) {
            return path.join(options.baseDir, filepath);
        },
        checkFile = function (filepath) {
            var hash = getHash(filepath);
            if (hash != getCache(filepath)) {
                writeCache(filepath, hash);
                grunt.log.writeln('File ' + filepath.cyan + ' updated. Processing...');
                return true;
            }
            grunt.log.debug(filepath + ' has not been updated.');
            return false;
        },
        escapeRegex = function(s) {
            return s.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
        };


  return {
    getHash: getHash,
    getCache: getCache,
    writeCache: writeCache,
    getCacheFile: getCacheFile,
    parseBase: parseBase,
    checkFile: checkFile,
    escapeRegex: escapeRegex
  };
};