How to use the postcss-loader/src/options.call function in postcss-loader
To help you get started, we’ve selected a few postcss-loader examples, based on popular ways it is used in public projects.
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silvenon / css-customs / packages / css-customs-loader / lib / index.js View on Github 
return callback(err)
}
const postcssLoader = this.loaders[postcssLoaderIndex]
let postcssPlugins
let postcssOptions
// imitating postcss-loader behavior
// https://github.com/postcss/postcss-loader/blob/master/src/index.js
if (
Object.keys(postcssLoader.options || {}).filter(
option => !['ident', 'config', 'sourceMap'].includes(option)
).length > 0
) {
const { options, plugins } = await parsePostcssLoaderOptions.call(
this,
postcssLoader.options
)
postcssOptions = options
postcssPlugins = plugins
} else {
const file = this.resourcePath
const rc = {
path: path.dirname(file),
ctx: {
cwd: this.context,
file: {
extname: path.extname(file),
dirname: path.dirname(file),
basename: path.basename(file),
},
