Grunt.js, Warning: Unable to write "src" file (Error code: EISDIR)

Question

I have an `Gruntfile` written in `CoffeeScript` and I keep getting an `(Error code: EISDIR)` when the `cssmin` task is run. After running the task in verbose mode, I get this information: ``` Running "cssmin" task Running "cssmin:src" (cssmin) task Verifying property cssmin.src exists in config...OK Files: assets/z.styles.concat.css.liquid -> src Options: report=false Reading assets/z.styles.concat.css.liquid...OK Writing src...ERROR Warning: Unable to write "src" file (Error code: EISDIR). Use --force to continue. ``` Here's my cssmin task: ``` cssmin: src: 'assets/z.styles.concat.css.liquid' dest: 'assets/styles.min.css.liquid' ``` The `z.styles.concat.css.liquid` is created after `concat` runs and is successfully outputted to the assets folder. The path listed in the src attribute is correct. Any idea what could be throwing the error? Also, here is the entire gruntfile for connivence. Grunt.coffee: ``` module.exports = (grunt) -> # Project configuration. grunt.initConfig pkg: grunt…

Accepted Answer

In your output Grunt's trying to run the `cssmin:src` task and then it tries writing to the source file. This can't be the desired result?

You need to specify a name for the cssmin task because it's a multitask. See the Grunt documentation for additional information.

Change your grunt config to

```
cssmin:
    minify:
        src: 'assets/z.styles.concat.css.liquid'
        dest: 'assets/styles.min.css.liquid'
```

Grunt.js, Warning: Unable to write "src" file (Error code: EISDIR)

Solution

Problem