Grunt replace throwing an undefined destination error

I'm attempting to use grunt replace in order to modify file names and append a random number to prevent caching of images, CSS, and JS files.

Here is the code I am running:


module.exports = function replace(grunt) {

  var randomVersion = ((new Date()).valueOf().toString()) + (Math.floor((Math.random() * 1000000) + 1).toString());
  var replace = {

      options: {
        variables: {
          'randomVersion': randomVersion
        },
        overwrite: true
      },
      files: [{
        src: './target/dist/index.html',
        dest: './target/dist/index.' + randomVersion + '.html'
      }]
  };

  console.log(randomVersion);

  grunt.config.set('replace', replace);
};

However, when I run this code, all I receive is a "Destination is not defined" error. Can anyone provide any insight on this issue?

Thank you!

Answer №1

Understanding the purpose of your code may be a bit unclear to me, but I will provide an answer based on my interpretation.

It seems like you might be attempting to utilize the grunt-replace library. However, it appears that this is not the right choice for replacing file paths themselves; instead, it is typically used for modifying content within source files.

If your goal is to simply copy your index.html file to a path with a unique identifier, creating a custom task isn't really necessary. The provided Gruntfile.js example demonstrates how this can be achieved using the grunt-contrib-clean and grunt-contrib-copy libraries.

module.exports = function (grunt) {

    grunt.initConfig({
        clean: {
            dist: ['./target/dist/index.*.html']
        },

        copy: {
            dist: {
                src: './target/src/index.html',
                dest: './target/dist/index.<%= Date.now() %>.html'       
            }
        }
    });

    grunt.loadNpmTasks('grunt-contrib-clean');
    grunt.loadNpmTasks('grunt-contrib-copy');

    grunt.registerTask('default', ['clean', 'copy']);

};

A few key points about this solution include:

  • The index.html file remains in the /src folder as it's a source file and not intended for distribution.
  • Prior to creating new versions of the index.*.html file, existing versions in the /dist folder are removed to avoid accumulation.
  • Instead of using a random number for versioning, a timestamp is utilized to ensure each version has a higher number than the previous one.

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