Grunt Uglify source map “unable to write”

问题

I'm using Grunt to concat and minify files (with grunt-contrib-uglify and grunt-contrib-concat ) and I wanted to add a source map. The uglify docs say to just add an option for sourceMap set to a boolean of true. But when I add that to my tasks (I've tried a couple different ones) the process runs fine until it gets to the source map part, then I get:

Writing true...ERROR

Warning: Unable to write "true" file (Error code: undefined). Use --force to continue.

The concatenation is done, the minification is done. But... no luck with the sourcemap.

Sample from my Grunt file:

uglify: {
  options: {
    banner: '/*! <%= pkg.name %> <%= pkg.version %> <%= grunt.template.today("yyyy-mm-dd") %> */\n',
  },
  publicjs: {
    options: {
        sourceMap: true
    },
    files: {
      'js/<%= pkg.name %>_public.min.js': ['<%= concat.publicjs.dest %>']
    }
  }
}

(I've also tried with the sourceMap in my top level options object.)

Any ideas? Clearly Grunt can write to the directory because it creates the concatenated and minified files, and I can't think of what else might be the trouble.

回答1:

https://github.com/gruntjs/grunt-contrib-uglify

Section " Migrating from 2.x to 3.x" mentions this:

sourceMap - Only accepts a Boolean value. Generates a map with a default name for you

So it looks like you are using an older version with the new version's config options.

You can upgrade.
Or use the older version's config options. (I think you should assign the destination file name to this variable instead of true. But I didn't verify in the old version's documentation.)

来源：https://stackoverflow.com/questions/22570331/grunt-uglify-source-map-unable-to-write

标签

gruntjs

grunt-contrib-uglify