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resolveImport.js
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resolveImport.js
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import { urlToPathname } from "./internal/urlToPathname.js"
import { pathnameToExtension } from "./internal/pathnameToExtension.js"
import { resolveUrl } from "./resolveUrl.js"
import { applyImportMap } from "./applyImportMap.js"
export const resolveImport = ({
specifier,
importer,
importMap,
defaultExtension = false,
createBareSpecifierError,
onImportMapping = () => {},
}) => {
let url
if (importMap) {
url = applyImportMap({
importMap,
specifier,
importer,
createBareSpecifierError,
onImportMapping,
})
} else {
url = resolveUrl(specifier, importer)
}
if (defaultExtension) {
url = applyDefaultExtension({ url, importer, defaultExtension })
}
return url
}
const applyDefaultExtension = ({ url, importer, defaultExtension }) => {
if (urlToPathname(url).endsWith("/")) {
return url
}
if (typeof defaultExtension === "string") {
const extension = pathnameToExtension(url)
if (extension === "") {
return `${url}${defaultExtension}`
}
return url
}
if (defaultExtension === true) {
const extension = pathnameToExtension(url)
if (extension === "" && importer) {
const importerPathname = urlToPathname(importer)
const importerExtension = pathnameToExtension(importerPathname)
return `${url}${importerExtension}`
}
}
return url
}