62 lines
1.7 KiB
JavaScript
62 lines
1.7 KiB
JavaScript
import fs from "node:fs";
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import path from "node:path";
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import url from "node:url";
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import { resolve } from "import-meta-resolve";
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import { isUrl, toUrl } from "url-or-path";
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import { PROJECT_ROOT } from "../utilities/index.js";
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const NODE_MODULES_PATH = path.join(PROJECT_ROOT, "node_modules");
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/**
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Get a package file.
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@param {string} file - package file to get
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- a package name like `"prettier"`
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- a package name with path like `"prettier/index.js"`
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@param {string} [base] -- Where the package should be solved from
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- a package name like `"prettier"`
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- a file URL like `"file://path/to/prettier"`
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- an absolute path like `"/path/to/prettier"`
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@returns {string}
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*/
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function getPackageFile(file, base) {
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const packageName = file
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.split("/")
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.slice(0, file.startsWith("@") ? 2 : 1)
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.join("/");
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base ??= path.join(NODE_MODULES_PATH, packageName);
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if (!path.isAbsolute(base) && !isUrl(base)) {
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base = getPackageFile(base);
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}
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const packageEntry = url.fileURLToPath(resolve(packageName, toUrl(base)));
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const dirname = `/node_modules/${packageName}/`.replaceAll("/", path.sep);
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const index = packageEntry
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.slice(PROJECT_ROOT.length - 1)
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.lastIndexOf(dirname);
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if (!packageEntry.startsWith(NODE_MODULES_PATH) || index === -1) {
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throw new Error(`Unexpected '${packageName}' entry '${packageEntry}'.`);
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}
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let resolved;
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if (packageName === file) {
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resolved = packageEntry;
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} else {
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const packageDirectory = packageEntry.slice(
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0,
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PROJECT_ROOT.length + dirname.length + index - 1,
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);
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resolved = path.join(packageDirectory, file.slice(packageName.length));
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}
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if (!fs.existsSync(resolved)) {
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throw new Error(`'${file}' not exist.`);
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}
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return resolved;
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}
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export { getPackageFile };
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