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import { createFilter } from "@rollup/pluginutils";
// import { realpathSync } from './fs';
// returns the imported package name for bare module imports
export function getPackageName(id) {
Eif (id.startsWith(".") || id.startsWith("/")) {
return null;
}
const split = id.split("/");
// @my-scope/my-package/foo.js -> @my-scope/my-package
// @my-scope/my-package -> @my-scope/my-package
if (split[0][0] === "@") {
return `${split[0]}/${split[1]}`;
}
// my-package/foo.js -> my-package
// my-package -> my-package
return split[0];
}
export function getMainFields(options) {
let mainFields;
Iif (options.mainFields) {
({ mainFields } = options);
} else {
mainFields = ["module", "main"];
}
Eif (options.browser && mainFields.indexOf("browser") === -1) {
return ["browser"].concat(mainFields);
}
if (!mainFields.length) {
throw new Error(
"Please ensure at least one `mainFields` value is specified",
);
}
return mainFields;
}
export function getPackageInfo(options) {
const {
cache,
extensions,
pkg,
mainFields,
preserveSymlinks,
useBrowserOverrides,
rootDir,
ignoreSideEffectsForRoot,
fs,
} = options;
let { pkgPath } = options;
if (cache.has(pkgPath)) {
return cache.get(pkgPath);
}
// browserify/resolve doesn't realpath paths returned in its packageFilter callback
Eif (!preserveSymlinks) {
pkgPath = fs.realpathSync(pkgPath);
}
const pkgRoot = dirname(pkgPath);
const packageInfo = {
// copy as we are about to munge the `main` field of `pkg`.
packageJson: { ...pkg },
// path to package.json file
packageJsonPath: pkgPath,
// directory containing the package.json
root: pkgRoot,
// which main field was used during resolution of this module (main, module, or browser)
resolvedMainField: "main",
// whether the browser map was used to resolve the entry point to this module
browserMappedMain: false,
// the entry point of the module with respect to the selected main field and any
// relevant browser mappings.
resolvedEntryPoint: "",
};
let overriddenMain = false;
for (let i = 0; i < mainFields.length; i++) {
const field = mainFields[i];
Eif (typeof pkg[field] === "string") {
pkg.main = pkg[field];
packageInfo.resolvedMainField = field;
overriddenMain = true;
break;
}
}
const internalPackageInfo = {
cachedPkg: pkg,
hasModuleSideEffects: () => null,
hasPackageEntry:
overriddenMain !== false || mainFields.indexOf("main") !== -1,
packageBrowserField:
useBrowserOverrides &&
typeof pkg.browser === "object" &&
Object.keys(pkg.browser).reduce((browser, key) => {
let resolved = pkg.browser[key];
if (resolved && resolved[0] === ".") {
resolved = resolve(pkgRoot, resolved);
}
/* eslint-disable no-param-reassign */
browser[key] = resolved;
if (key[0] === ".") {
const absoluteKey = resolve(pkgRoot, key);
browser[absoluteKey] = resolved;
if (!extname(key)) {
extensions.reduce((subBrowser, ext) => {
subBrowser[absoluteKey + ext] = subBrowser[key];
return subBrowser;
}, browser);
}
}
return browser;
}, {}),
packageInfo,
};
const browserMap = internalPackageInfo.packageBrowserField;
Iif (
useBrowserOverrides &&
typeof pkg.browser === "object" &&
// eslint-disable-next-line no-prototype-builtins
browserMap.hasOwnProperty(pkg.main)
) {
packageInfo.resolvedEntryPoint = browserMap[pkg.main];
packageInfo.browserMappedMain = true;
} else {
// index.node is technically a valid default entrypoint as well...
packageInfo.resolvedEntryPoint = resolve(pkgRoot, pkg.main || "index.js");
packageInfo.browserMappedMain = false;
}
Eif (!ignoreSideEffectsForRoot || rootDir !== pkgRoot) {
const packageSideEffects = pkg.sideEffects;
Iif (typeof packageSideEffects === "boolean") {
internalPackageInfo.hasModuleSideEffects = () => packageSideEffects;
} else Iif (Array.isArray(packageSideEffects)) {
const finalPackageSideEffects = packageSideEffects.map((sideEffect) => {
/*
* The array accepts simple glob patterns to the relevant files... Patterns like .css, which do not include a /, will be treated like **\/.css.
* https://webpack.js.org/guides/tree-shaking/
*/
if (sideEffect.includes("/")) {
return sideEffect;
}
return `**/${sideEffect}`;
});
internalPackageInfo.hasModuleSideEffects = createFilter(
finalPackageSideEffects,
null,
{
resolve: pkgRoot,
},
);
}
}
cache.set(pkgPath, internalPackageInfo);
return internalPackageInfo;
}
export function normalizeInput(input) {
if (Array.isArray(input)) {
return input;
} else if (typeof input === "object") {
return Object.values(input);
}
// otherwise it's a string
return [input];
}
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