Overwriting existing minified file?

[norfali]

When I run grunt cssmin, it works great by writing a new file style.min.css.

However if I run cssmin again, instead of overwriting the contents of style.min.css as expected, it seems to append instead.

This sounds like a bug but happy to be corrected!

[vladikoff]

Can't reproduce. You need to show us your config.
This can easily be tested by removing clean from out tests: https://github.com/gruntjs/grunt-contrib-cssmin/blob/master/Gruntfile.js#L84
and rerunning the tests multiple times.

[jeffmcmahan]

Same issue here. The output file grows longer each time.

Any luck with this @norfali ?

EDIT: Seems to have been a version conflict in my environment. Resolved now.

EDIT 2: No, I take that back. It's still doing it. Just not every time. This is weird.

[jeffmcmahan]

Update: Doesn't happen with a single source file. Only when there are multiple .styl source files.

In my case, the task is [ 'stylus', 'cssmin', 'clean:stylesheets' ]

Stylus and cssmin are latest.

[norfali]

Yep @jeffmcmahan - issue still occurs. The workaround was to add clean plugin for erasing files before cssmin runs. My config:

   clean: ['your_path/css/*.min.css', '!your_path/css/*.css'],
   cssmin: {
      minify: {
        expand: true,
        cwd: 'your_path/css/',
        src: ['*.css'],
        dest: 'your_path/css/',
        ext: '.min.css'
      }
    }

A task:

grunt.registerTask('minify', ['clean', 'cssmin']);


Worked well for me - hope this helps :)

[vladikoff]

Reopened the issue. This is strange, as I mentioned earlier I ran the tests without clean and the output was fine.
What OS are you guys on @norfali @jeffmcmahan ?

[norfali]

Am on Windows 7.

[vladikoff]

Ok I will look into this on Windows in the next few days and will let you know

[jeffmcmahan]

I'm using OSX 10.9.2. Latest Node.js, and latest grunt-contrib-clean, too.

[norfali]

Strange. Long shot but what file sizes are your CSS? Also how many lines?

[jeffmcmahan]

Very small, in my case. Fewer than 200 lines.

[vladikoff]

@norfali in your configuration have you tried changing:
src: ['*.css'], to src: ['*.css', '!*.min.css'].

@jeffmcmahan what is your configuration?

[jeffmcmahan]

I'm was compiling many-to-one, as follows:

  cssmin: {
      build: {
        files: {
          'demo/build/matte.min.css': [ 'demo/build/**/*.min.css' ]
        }
      }
    }

But I see the sensible way to do that is, this:

cssmin: {
  combine: {
    files: {
      'path/to/output.css': ['path/to/input_one.css', 'path/to/input_two.css']
    }
  }
}

... and that solved my problem. No bug in my case.

[rubyisapm]

If two files have the same part,the combined file will repeated those code.I wonder how to deal with it?

[vladikoff]

'demo/build/matte.min.css': [ 'demo/build/**/*.min.css' ] have to be careful with this pattern. It will take the files that it made and use them again.
Use --verbose to see which files are used in INPUT -> OUTPUT.