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: / var / canvas / node_modules / dependency-cruiser / src / config-utl /
Filename : extract-ts-config.mjs
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import { dirname, resolve } from "node:path";
import tryImport from "semver-try-require";
import meta from "#meta.cjs";

const typescript = await tryImport(
  "typescript",
  meta.supportedTranspilers.typescript,
);

const FORMAT_DIAGNOSTICS_HOST = {
  getCanonicalFileName(pFileName) {
    let lReturnValue = pFileName.toLowerCase();

    // depends on the platform which branch is taken, hence the c8 ignore
    /* c8 ignore start */
    if (typescript?.sys?.useCaseSensitiveFileNames ?? false) {
      lReturnValue = pFileName;
    }
    /* c8 ignore stop */
    return lReturnValue;
  },
  getCurrentDirectory() {
    return process.cwd();
  },
  getNewLine() {
    return "\n";
  },
};

/**
 * Reads the file with name `pTSConfigFileName` and returns its parsed
 * contents as an object
 *
 * Silently fails if a supported version of the typescript compiler isn't available
 *
 * @param {string} pTSConfigFileName
 * @return {import("typescript").ParsedCommandLine} tsconfig as an object
 * @throws {Error} when the tsconfig is invalid/ has errors
 * @throws {TypeError} when the tsconfig is unreadable
 */
export default function extractTSConfig(pTSConfigFileName) {
  let lReturnValue = {};

  if (typescript) {
    const lConfig = typescript.readConfigFile(
      pTSConfigFileName,
      typescript.sys.readFile,
    );

    if (typeof lConfig.error !== "undefined") {
      throw new TypeError(
        typescript.formatDiagnostics([lConfig.error], FORMAT_DIAGNOSTICS_HOST),
      );
    }
    lReturnValue = typescript.parseJsonConfigFileContent(
      lConfig.config,
      typescript.sys,
      dirname(resolve(pTSConfigFileName)),
      {},
      pTSConfigFileName,
    );

    if (lReturnValue.errors.length > 0) {
      throw new Error(
        typescript.formatDiagnostics(
          lReturnValue.errors,
          FORMAT_DIAGNOSTICS_HOST,
        ),
      );
    }
    // lRetval.fileNames; // all files included in the project
    // lRetval.options; // CompilerOptions
  }

  return lReturnValue;
}