config file with function doesn't work if path contains .webpack

[dillonkrug]

webpack config file where module.exports is a function doesn't work depending on the file path.

If the config file path contains .webpack, the result of calling the config function is ignored.

Steps to reproduce the behavior:

// project/config.webpack.js -- note that filename contains ".webpack"
module.exports = (env) => ({
    entry: 'some-file.js'
    output: {
        path: './dist',
        file: 'some-bundle.js'
    }
});

$/project> webpack --config config.webpack.js

This produces an error saying "./src cannot be resolved" because the actual config is ignored, and webpack falls back to default configuration.

** Cause **

lib/groups/ConfigGroup.js in the finalize function:

    if (configOptions && configPath.includes('.webpack')) {
        // overrides the resolved options
    }

this condition is not specific enough.

[alexander-akait]

Please do not ignore the issue template, in future it will be closed without reply