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111 lines
2.4 KiB
111 lines
2.4 KiB
3 years ago
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// @ts-check
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const { warn } = require('./logger')
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/** @typedef {{after?: string|Array<string>}} Apply */
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/** @typedef {{id: string, apply: Apply}} Plugin */
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/** @typedef {{after: Set<string>}} OrderParams */
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/** @type {Map<string, OrderParams>} */
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const orderParamsCache = new Map()
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/**
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*
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* @param {Plugin} plugin
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* @returns {OrderParams}
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*/
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function getOrderParams (plugin) {
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if (!process.env.VUE_CLI_TEST && orderParamsCache.has(plugin.id)) {
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return orderParamsCache.get(plugin.id)
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}
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const apply = plugin.apply
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let after = new Set()
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if (typeof apply.after === 'string') {
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after = new Set([apply.after])
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} else if (Array.isArray(apply.after)) {
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after = new Set(apply.after)
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}
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if (!process.env.VUE_CLI_TEST) {
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orderParamsCache.set(plugin.id, { after })
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}
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return { after }
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}
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/**
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* See leetcode 210
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* @param {Array<Plugin>} plugins
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* @returns {Array<Plugin>}
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*/
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function topologicalSorting (plugins) {
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/** @type {Map<string, Plugin>} */
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const pluginsMap = new Map(plugins.map(p => [p.id, p]))
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/** @type {Map<Plugin, number>} */
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const indegrees = new Map()
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/** @type {Map<Plugin, Array<Plugin>>} */
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const graph = new Map()
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plugins.forEach(p => {
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const after = getOrderParams(p).after
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indegrees.set(p, after.size)
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if (after.size === 0) return
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for (const id of after) {
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const prerequisite = pluginsMap.get(id)
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// remove invalid data
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if (!prerequisite) {
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indegrees.set(p, indegrees.get(p) - 1)
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continue
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}
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if (!graph.has(prerequisite)) {
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graph.set(prerequisite, [])
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}
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graph.get(prerequisite).push(p)
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}
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})
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const res = []
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const queue = []
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indegrees.forEach((d, p) => {
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if (d === 0) queue.push(p)
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})
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while (queue.length) {
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const cur = queue.shift()
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res.push(cur)
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const neighbors = graph.get(cur)
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if (!neighbors) continue
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neighbors.forEach(n => {
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const degree = indegrees.get(n) - 1
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indegrees.set(n, degree)
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if (degree === 0) {
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queue.push(n)
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}
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})
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}
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const valid = res.length === plugins.length
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if (!valid) {
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warn(`No proper plugin execution order found.`)
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return plugins
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}
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return res
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}
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/**
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* Arrange plugins by 'after' property.
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* @param {Array<Plugin>} plugins
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* @returns {Array<Plugin>}
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*/
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function sortPlugins (plugins) {
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if (plugins.length < 2) return plugins
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return topologicalSorting(plugins)
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}
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module.exports = {
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topologicalSorting,
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sortPlugins
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}
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