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'use strict'
const cloneDeepWith = require('lodash.clonedeepwith')
const merge = require('lodash.merge')
const resolvePluginsAndPresets = require('./resolvePluginsAndPresets')
function trackDependency (dependencies, filename, fromPackage, envName) {
if (dependencies.has(filename)) {
const existing = dependencies.get(filename)
if (envName) {
existing.envs.add(envName)
} else {
existing.default = true
}
return
}
const item = {
default: !envName,
envs: new Set(envName ? [envName] : []),
filename,
fromPackage
}
dependencies.set(filename, item)
}
function trackSource (sources, source, envName) {
if (sources.has(source)) {
const existing = sources.get(source)
if (envName) {
existing.envs.add(envName)
} else {
existing.default = true
}
return
}
const item = {
default: !envName,
envs: new Set(envName ? [envName] : []),
source
}
sources.set(source, item)
}
function createOptions (plugins, presets) {
const options = {}
if (plugins) options.plugins = plugins
// istanbul ignore else
if (presets) options.presets = presets
return options
}
function compressOptions (orderedOptions) {
const remaining = orderedOptions.slice(0, 1)
remaining[0].babelrc = false
for (let index = 1; index < orderedOptions.length; index++) {
const options = orderedOptions[index]
delete options.babelrc
const plugins = options.plugins
delete options.plugins
const presets = options.presets
delete options.presets
merge(remaining[0], options)
if (plugins || presets) {
remaining.push(createOptions(plugins, presets))
}
}
return remaining
}
function reduceOptions (chain, envName, pluginsAndPresets, dependencies, sources, fixedSourceHashes) {
let json5 = false
const orderedOptions = Array.from(chain, config => {
trackSource(sources, config.source, envName)
if (config.hash) {
fixedSourceHashes.set(config.source, config.hash)
}
if (config.json5) json5 = true
const lookup = pluginsAndPresets.get(config)
const mapPluginOrPreset = (getEntry, ref) => {
if (Array.isArray(ref)) {
return ref.length === 1
? mapPluginOrPreset(getEntry, ref[0])
: [mapPluginOrPreset(getEntry, ref[0]), ref[1]]
}
const entry = getEntry(ref)
trackDependency(dependencies, entry.filename, entry.fromPackage, envName)
return entry.filename
}
return cloneDeepWith(config.options, (value, key, object) => {
if (object === config.options && (key === 'plugins' || key === 'presets')) {
const getEntry = ref => lookup[key].get(ref)
return Array.isArray(value)
? value.map(ref => mapPluginOrPreset(getEntry, ref))
: []
}
})
})
const unflattenedOptions = compressOptions(orderedOptions)
unflattenedOptions.json5 = json5
return unflattenedOptions
}
function reduceChains (chains, cache) {
const pluginsAndPresets = resolvePluginsAndPresets(chains, cache)
const dependencies = new Map()
const envNames = new Set()
const fixedSourceHashes = new Map()
const sources = new Map()
const unflattenedDefaultOptions = reduceOptions(
chains.defaultChain, null, pluginsAndPresets, dependencies, sources, fixedSourceHashes
)
const unflattenedEnvOptions = new Map()
for (const pair of chains.envChains) {
const envName = pair[0]
const chain = pair[1]
envNames.add(envName)
unflattenedEnvOptions.set(
envName,
reduceOptions(chain, envName, pluginsAndPresets, dependencies, sources, fixedSourceHashes)
)
}
return {
dependencies:
Array.from(dependencies.keys())
.sort()
.map(filename => dependencies.get(filename)),
envNames,
fixedSourceHashes,
sources:
Array.from(sources.keys())
.sort()
.map(source => sources.get(source)),
unflattenedDefaultOptions,
unflattenedEnvOptions
}
}
module.exports = reduceChains
|
