/
downgrade.js
64 lines (56 loc) · 1.4 KB
/
downgrade.js
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// https://webpack.js.org/guides/migrating/
const flatten = require("lodash/flatten")
const omit = require("lodash/omit")
const tail = require("lodash/tail")
const getLoader = (loaderConf) => {
const loader = (typeof loaderConf === "string") ? loaderConf :loaderConf.loader
return { loader }
}
const getQuery = (loader) => (
(!!loader.options) ? { query: loader.options } : {}
)
const getRest = (conf) => {
return omit(conf, [
"use",
"enforce"
])
}
const convert = (conf) => {
return flatten(conf.use.map( (loaderConf) => {
return Object.assign(
getLoader(loaderConf),
getQuery(loaderConf),
getRest(conf)
)
}))
}
const convertLoaders = (config) => {
const loaders = flatten(config.map( (conf) => {
return convert(conf)
}) )
return loaders
}
const filterConfig = (config, enfoceFlag) => {
return config.filter( (conf) => {
if(enfoceFlag == null && !conf.enforce){
return true
}
return conf.enforce === enfoceFlag
})
}
const convertEnfoceLoaders = (config, key, enfoceFlag) => {
const filterd = filterConfig(config, enfoceFlag)
if(filterd.length === 0){
return {}
}
return {
[key]: convertLoaders(filterd)
}
}
module.exports = (config) => {
return Object.assign(
convertEnfoceLoaders(config, "preLoaders", "pre"),
convertEnfoceLoaders(config, "loaders", null),
convertEnfoceLoaders(config, "postLoaders", "post")
)
}