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CompilerOptions,
CodegenResult,
CompilerError,
NodeTransform,
ParserOptions,
RootNode
} from '@vue/compiler-core'
import { SourceMapConsumer, SourceMapGenerator, RawSourceMap } from 'source-map'
import {
transformAssetUrl,
AssetURLOptions,
createAssetUrlTransformWithOptions,
AssetURLTagConfig,
normalizeOptions
} from './templateTransformAssetUrl'
import {
transformSrcset,
createSrcsetTransformWithOptions
} from './templateTransformSrcset'
import { generateCodeFrame, isObject } from '@vue/shared'
import * as CompilerDOM from '@vue/compiler-dom'
import * as CompilerSSR from '@vue/compiler-ssr'
import consolidate from '@vue/consolidate'
import { warnOnce } from './warn'
import { genCssVarsFromList } from './cssVars'
export interface TemplateCompiler {
compile(template: string, options: CompilerOptions): CodegenResult
parse(template: string, options: ParserOptions): RootNode
}
export interface SFCTemplateCompileResults {
code: string
ast?: RootNode
preamble?: string
source: string
tips: string[]
errors: (string | CompilerError)[]
map?: RawSourceMap
}
export interface SFCTemplateCompileOptions {
source: string
filename: string
id: string
scoped?: boolean
slotted?: boolean
isProd?: boolean
ssr?: boolean
ssrCssVars?: string[]
inMap?: RawSourceMap
compiler?: TemplateCompiler
compilerOptions?: CompilerOptions
preprocessLang?: string
preprocessOptions?: any
/**
* In some cases, compiler-sfc may not be inside the project root (e.g. when
* linked or globally installed). In such cases a custom `require` can be
* passed to correctly resolve the preprocessors.
*/
preprocessCustomRequire?: (id: string) => any
/**
* Configure what tags/attributes to transform into asset url imports,
* or disable the transform altogether with `false`.
*/
transformAssetUrls?: AssetURLOptions | AssetURLTagConfig | boolean
}
interface PreProcessor {
render(
source: string,
options: any,
cb: (err: Error | null, res: string) => void
): void
}
function preprocess(
{ source, filename, preprocessOptions }: SFCTemplateCompileOptions,
preprocessor: PreProcessor
): string {
// Consolidate exposes a callback based API, but the callback is in fact
// called synchronously for most templating engines. In our case, we have to
// expose a synchronous API so that it is usable in Jest transforms (which
// have to be sync because they are applied via Node.js require hooks)
let res: string = ''
let err: Error | null = null
preprocessor.render(
source,
{ filename, ...preprocessOptions },
(_err, _res) => {
if (_err) err = _err
res = _res
}
)
if (err) throw err
return res
}
export function compileTemplate(
options: SFCTemplateCompileOptions
): SFCTemplateCompileResults {
const { preprocessLang, preprocessCustomRequire } = options
Iif (
(__ESM_BROWSER__ || __GLOBAL__) &&
preprocessLang &&
!preprocessCustomRequire
) {
throw new Error(
`[@vue/compiler-sfc] Template preprocessing in the browser build must ` +
`provide the \`preprocessCustomRequire\` option to return the in-browser ` +
`version of the preprocessor in the shape of { render(): string }.`
)
}
const preprocessor = preprocessLang
? preprocessCustomRequire
? preprocessCustomRequire(preprocessLang)
: __ESM_BROWSER__
? undefined
: consolidate[preprocessLang as keyof typeof consolidate]
: false
if (preprocessor) {
try {
return doCompileTemplate({
...options,
source: preprocess(options, preprocessor)
})
} catch (e: any) {
return {
code: `export default function render() {}`,
source: options.source,
tips: [],
errors: [e]
}
}
} else if (preprocessLang) {
return {
code: `export default function render() {}`,
source: options.source,
tips: [
`Component ${options.filename} uses lang ${preprocessLang} for template. Please install the language preprocessor.`
],
errors: [
`Component ${options.filename} uses lang ${preprocessLang} for template, however it is not installed.`
]
}
} else {
return doCompileTemplate(options)
}
}
function doCompileTemplate({
filename,
id,
scoped,
slotted,
inMap,
source,
ssr = false,
ssrCssVars,
isProd = false,
compiler = ssr ? (CompilerSSR as TemplateCompiler) : CompilerDOM,
compilerOptions = {},
transformAssetUrls
}: SFCTemplateCompileOptions): SFCTemplateCompileResults {
const errors: CompilerError[] = []
const warnings: CompilerError[] = []
let nodeTransforms: NodeTransform[] = []
if (isObject(transformAssetUrls)) {
const assetOptions = normalizeOptions(transformAssetUrls)
nodeTransforms = [
createAssetUrlTransformWithOptions(assetOptions),
createSrcsetTransformWithOptions(assetOptions)
]
} else if (transformAssetUrls !== false) {
nodeTransforms = [transformAssetUrl, transformSrcset]
}
if (ssr && !ssrCssVars) {
warnOnce(
`compileTemplate is called with \`ssr: true\` but no ` +
`corresponding \`cssVars\` option.\`.`
)
}
if (!id) {
warnOnce(`compileTemplate now requires the \`id\` option.\`.`)
id = ''
}
const shortId = id.replace(/^data-v-/, '')
const longId = `data-v-${shortId}`
let { code, ast, preamble, map } = compiler.compile(source, {
mode: 'module',
prefixIdentifiers: true,
hoistStatic: true,
cacheHandlers: true,
ssrCssVars:
ssr && ssrCssVars && ssrCssVars.length
? genCssVarsFromList(ssrCssVars, shortId, isProd)
: '',
scopeId: scoped ? longId : undefined,
slotted,
sourceMap: true,
...compilerOptions,
nodeTransforms: nodeTransforms.concat(compilerOptions.nodeTransforms || []),
filename,
onError: e => errors.push(e),
onWarn: w => warnings.push(w)
})
// inMap should be the map produced by ./parse.ts which is a simple line-only
// mapping. If it is present, we need to adjust the final map and errors to
// reflect the original line numbers.
if (inMap) {
if (map) {
map = mapLines(inMap, map)
}
Iif (errors.length) {
patchErrors(errors, source, inMap)
}
}
const tips = warnings.map(w => {
let msg = w.message
Iif (w.loc) {
msg += `\n${generateCodeFrame(
source,
w.loc.start.offset,
w.loc.end.offset
)}`
}
return msg
})
return { code, ast, preamble, source, errors, tips, map }
}
function mapLines(oldMap: RawSourceMap, newMap: RawSourceMap): RawSourceMap {
Iif (!oldMap) return newMap
Iif (!newMap) return oldMap
const oldMapConsumer = new SourceMapConsumer(oldMap)
const newMapConsumer = new SourceMapConsumer(newMap)
const mergedMapGenerator = new SourceMapGenerator()
newMapConsumer.eachMapping(m => {
Iif (m.originalLine == null) {
return
}
const origPosInOldMap = oldMapConsumer.originalPositionFor({
line: m.originalLine,
column: m.originalColumn
})
if (origPosInOldMap.source == null) {
return
}
mergedMapGenerator.addMapping({
generated: {
line: m.generatedLine,
column: m.generatedColumn
},
original: {
line: origPosInOldMap.line, // map line
// use current column, since the oldMap produced by @vue/compiler-sfc
// does not
column: m.originalColumn
},
source: origPosInOldMap.source,
name: origPosInOldMap.name
})
})
// source-map's type definition is incomplete
const generator = mergedMapGenerator as any
;(oldMapConsumer as any).sources.forEach((sourceFile: string) => {
generator._sources.add(sourceFile)
const sourceContent = oldMapConsumer.sourceContentFor(sourceFile)
if (sourceContent != null) {
mergedMapGenerator.setSourceContent(sourceFile, sourceContent)
}
})
generator._sourceRoot = oldMap.sourceRoot
generator._file = oldMap.file
return generator.toJSON()
}
function patchErrors(
errors: CompilerError[],
source: string,
inMap: RawSourceMap
) {
const originalSource = inMap.sourcesContent![0]
const offset = originalSource.indexOf(source)
const lineOffset = originalSource.slice(0, offset).split(/\r?\n/).length - 1
errors.forEach(err => {
Iif (err.loc) {
err.loc.start.line += lineOffset
err.loc.start.offset += offset
Iif (err.loc.end !== err.loc.start) {
err.loc.end.line += lineOffset
err.loc.end.offset += offset
}
}
})
}
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