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const path = require('path')
const hash = require('hash-sum')
const qs = require('querystring')
const plugin = require('./plugin')
const selectBlock = require('./select')
const loaderUtils = require('loader-utils')
const { attrsToQuery } = require('./codegen/utils')
const { parse } = require('@vue/component-compiler-utils')
const genStylesCode = require('./codegen/styleInjection')
const { genHotReloadCode } = require('./codegen/hotReload')
const genCustomBlocksCode = require('./codegen/customBlocks')
const componentNormalizerPath = require.resolve('./runtime/componentNormalizer')
const { NS } = require('./plugin')
let errorEmitted = false
function loadTemplateCompiler (loaderContext) {
try {
return require('vue-template-compiler')
} catch (e) {
if (/version mismatch/.test(e.toString())) {
loaderContext.emitError(e)
} else {
loaderContext.emitError(new Error(
`[vue-loader] vue-template-compiler must be installed as a peer dependency, ` +
`or a compatible compiler implementation must be passed via options.`
))
}
}
}
module.exports = function (source) {
const loaderContext = this
if (!errorEmitted && !loaderContext['thread-loader'] && !loaderContext[NS]) {
loaderContext.emitError(new Error(
`vue-loader was used without the corresponding plugin. ` +
`Make sure to include VueLoaderPlugin in your webpack config.`
))
errorEmitted = true
}
const stringifyRequest = r => loaderUtils.stringifyRequest(loaderContext, r)
const {
target,
request,
minimize,
sourceMap,
rootContext,
resourcePath,
resourceQuery
} = loaderContext
const rawQuery = resourceQuery.slice(1)
const inheritQuery = `&${rawQuery}`
const incomingQuery = qs.parse(rawQuery)
const options = loaderUtils.getOptions(loaderContext) || {}
const isServer = target === 'node'
const isShadow = !!options.shadowMode
const isProduction = options.productionMode || minimize || process.env.NODE_ENV === 'production'
const filename = path.basename(resourcePath)
const context = rootContext || process.cwd()
const sourceRoot = path.dirname(path.relative(context, resourcePath))
const descriptor = parse({
source,
compiler: options.compiler || loadTemplateCompiler(loaderContext),
filename,
sourceRoot,
needMap: sourceMap
})
// if the query has a type field, this is a language block request
// e.g. foo.vue?type=template&id=xxxxx
// and we will return early
if (incomingQuery.type) {
return selectBlock(
descriptor,
loaderContext,
incomingQuery,
!!options.appendExtension
)
}
// module id for scoped CSS & hot-reload
const rawShortFilePath = path
.relative(context, resourcePath)
.replace(/^(\.\.[\/\\])+/, '')
const shortFilePath = rawShortFilePath.replace(/\\/g, '/') + resourceQuery
const id = hash(
isProduction
? (shortFilePath + '\n' + source)
: shortFilePath
)
// feature information
const hasScoped = descriptor.styles.some(s => s.scoped)
const hasFunctional = descriptor.template && descriptor.template.attrs.functional
const needsHotReload = (
!isServer &&
!isProduction &&
(descriptor.script || descriptor.template) &&
options.hotReload !== false
)
// template
let templateImport = `var render, staticRenderFns`
let templateRequest
if (descriptor.template) {
const src = descriptor.template.src || resourcePath
const idQuery = `&id=${id}`
const scopedQuery = hasScoped ? `&scoped=true` : ``
const attrsQuery = attrsToQuery(descriptor.template.attrs)
const query = `?vue&type=template${idQuery}${scopedQuery}${attrsQuery}${inheritQuery}`
const request = templateRequest = stringifyRequest(src + query)
templateImport = `import { render, staticRenderFns } from ${request}`
}
// script
let scriptImport = `var script = {}`
if (descriptor.script) {
const src = descriptor.script.src || resourcePath
const attrsQuery = attrsToQuery(descriptor.script.attrs, 'js')
const query = `?vue&type=script${attrsQuery}${inheritQuery}`
const request = stringifyRequest(src + query)
scriptImport = (
`import script from ${request}\n` +
`export * from ${request}` // support named exports
)
}
// styles
let stylesCode = ``
if (descriptor.styles.length) {
stylesCode = genStylesCode(
loaderContext,
descriptor.styles,
id,
resourcePath,
stringifyRequest,
needsHotReload,
isServer || isShadow // needs explicit injection?
)
}
let code = `
${templateImport}
${scriptImport}
${stylesCode}
/* normalize component */
import normalizer from ${stringifyRequest(`!${componentNormalizerPath}`)}
var component = normalizer(
script,
render,
staticRenderFns,
${hasFunctional ? `true` : `false`},
${/injectStyles/.test(stylesCode) ? `injectStyles` : `null`},
${hasScoped ? JSON.stringify(id) : `null`},
${isServer ? JSON.stringify(hash(request)) : `null`}
${isShadow ? `,true` : ``}
)
`.trim() + `\n`
if (descriptor.customBlocks && descriptor.customBlocks.length) {
code += genCustomBlocksCode(
descriptor.customBlocks,
resourcePath,
resourceQuery,
stringifyRequest
)
}
if (needsHotReload) {
code += `\n` + genHotReloadCode(id, hasFunctional, templateRequest)
}
// Expose filename. This is used by the devtools and Vue runtime warnings.
if (!isProduction) {
// Expose the file's full path in development, so that it can be opened
// from the devtools.
code += `\ncomponent.options.__file = ${JSON.stringify(rawShortFilePath.replace(/\\/g, '/'))}`
} else if (options.exposeFilename) {
// Libraies can opt-in to expose their components' filenames in production builds.
// For security reasons, only expose the file's basename in production.
code += `\ncomponent.options.__file = ${JSON.stringify(filename)}`
}
code += `\nexport default component.exports`
// console.log(code)
return code
}
module.exports.VueLoaderPlugin = plugin