vue hello world项目
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import { TransformAssetUrlsOptions } from './assetUrl'
import { UrlWithStringQuery, parse as uriParse } from 'url'
import path from 'path'
export interface Attr {
name: string
value: string
}
export interface ASTNode {
tag: string
attrs: Attr[]
}
export function urlToRequire(
url: string,
transformAssetUrlsOption: TransformAssetUrlsOptions = {}
): string {
const returnValue = `"${url}"`
// same logic as in transform-require.js
const firstChar = url.charAt(0)
if (firstChar === '~') {
const secondChar = url.charAt(1)
url = url.slice(secondChar === '/' ? 2 : 1)
}
const uriParts = parseUriParts(url)
if (transformAssetUrlsOption.base) {
// explicit base - directly rewrite the url into absolute url
// does not apply to absolute urls or urls that start with `@`
// since they are aliases
if (firstChar === '.' || firstChar === '~') {
// when packaged in the browser, path will be using the posix-
// only version provided by rollup-plugin-node-builtins.
return `"${(path.posix || path).join(
transformAssetUrlsOption.base,
uriParts.path + (uriParts.hash || '')
)}"`
}
return returnValue
}
if (firstChar === '.' || firstChar === '~' || firstChar === '@') {
if (!uriParts.hash) {
return `require("${url}")`
} else {
// support uri fragment case by excluding it from
// the require and instead appending it as string;
// assuming that the path part is sufficient according to
// the above caseing(t.i. no protocol-auth-host parts expected)
return `require("${uriParts.path}") + "${uriParts.hash}"`
}
}
return returnValue
}
/**
* vuejs/component-compiler-utils#22 Support uri fragment in transformed require
* @param urlString an url as a string
*/
function parseUriParts(urlString: string): UrlWithStringQuery {
// initialize return value
const returnValue: UrlWithStringQuery = uriParse('')
if (urlString) {
// A TypeError is thrown if urlString is not a string
// @see https://nodejs.org/api/url.html#url_url_parse_urlstring_parsequerystring_slashesdenotehost
if ('string' === typeof urlString) {
// check is an uri
return uriParse(urlString) // take apart the uri
}
}
return returnValue
}