vuepress/packages/@vuepress/core/lib/plugin-api/util.js

const logger = require('../util/logger')
const chalk = require('chalk')

exports.resolvePlugin = function (pluginRaw) {
  if (typeof pluginRaw === 'function' || typeof pluginRaw === 'object') {
    return pluginRaw
  }
  if (typeof pluginRaw === 'string') {
    try {
      return require(pluginRaw.startsWith('vuepress-plugin-')
        ? pluginRaw
        : `vuepress-plugin-${pluginRaw}`
      )
    } catch (err) {
      try {
        return require(pluginRaw.startsWith('@vuepress/plugin-')
          ? pluginRaw
          : `@vuepress/plugin-${pluginRaw}`
        )
      } catch (e) {
        console.error(chalk.red(logger.error(`\n[vuepress] Cannot resolve plugin: ${pluginRaw}\n`, false)))
        throw new Error(err)
      }
    }
  }
  logger.warn(`\n[vuepress] Invalid plugin usage: ${chalk.yellow(pluginRaw)}\n`)
}

exports.inferPluginName = function (pluginRaw, pluginConfig) {
  if (pluginConfig.name) {
    return pluginConfig.name
  }
  if (typeof pluginRaw === 'string') {
    if (pluginRaw.startsWith('vuepress-plugin-')) {
      return pluginRaw.slice(16)
    }
    return pluginRaw
  }
  // ensure each plugin have a unique name.
  return Date.now().toString(16)
}