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import * as babel from '@babel/core';
import { createFilter } from '@rollup/pluginutils';
import { addNamed } from '@babel/helper-module-imports';

const BUNDLED = 'bundled';
const INLINE = 'inline';
const RUNTIME = 'runtime';
const EXTERNAL = 'external';

// NOTE: DO NOT REMOVE the null character `\0` as it may be used by other plugins
// e.g. https://github.com/rollup/rollup-plugin-node-resolve/blob/313a3e32f432f9eb18cc4c231cc7aac6df317a51/src/index.js#L74
const HELPERS = '\0rollupPluginBabelHelpers.js';

// Revert to /\/helpers\/(esm\/)?inherits/ when Babel 8 gets released, this was fixed in https://github.com/babel/babel/issues/14185
const inheritsHelperRe = /[\\/]+helpers[\\/]+(esm[\\/]+)?inherits/;
async function preflightCheck(ctx, babelHelpers, transformOptions) {
  const finalOptions = addBabelPlugin(transformOptions, helpersTestTransform);
  const check = (await babel.transformAsync(PREFLIGHT_INPUT, finalOptions)).code;

// Babel sometimes splits ExportDefaultDeclaration into 2 statements, so we also check for ExportNamedDeclaration
  if (!/export (d|{)/.test(check)) {
    ctx.error(MODULE_ERROR);
  }
  if (inheritsHelperRe.test(check)) {
    if (babelHelpers === RUNTIME) {
      return;
    }
    ctx.error(mismatchError(RUNTIME, babelHelpers, transformOptions.filename));
  }
  if (check.includes('babelHelpers.inherits')) {
    if (babelHelpers === EXTERNAL) {
      return;
    }
    ctx.error(mismatchError(EXTERNAL, babelHelpers, transformOptions.filename));
  }

// test unminifiable string content
  if (check.includes('Super expression must either be null or a function')) {
    if (babelHelpers === INLINE || babelHelpers === BUNDLED) {
      return;
    }
    if (babelHelpers === RUNTIME && !transformOptions.plugins.length) {
      ctx.error(`You must use the \`@babel/plugin-transform-runtime\` plugin when \`babelHelpers\` is "${RUNTIME}".\n`);
    }
    ctx.error(mismatchError(INLINE, babelHelpers, transformOptions.filename));
  }
  ctx.error(UNEXPECTED_ERROR);
}

async function transformCode(inputCode, babelOptions, overrides, customOptions, ctx, finalizeOptions) {
  // loadPartialConfigAsync has become available in @babel/core@7.8.0
  const config = await (babel.loadPartialConfigAsync || babel.loadPartialConfig)(babelOptions);

// file is ignored by babel
  if (!config) {
    return null;
  }
  let transformOptions = !overrides.config ? config.options : await overrides.config.call(ctx, config, {
    code: inputCode,
    customOptions
  });
  if (finalizeOptions) {
    transformOptions = await finalizeOptions(transformOptions);
  }
  if (!overrides.result) {
    const {
      code,
      map
    } = await babel.transformAsync(inputCode, transformOptions);
    return {
      code,
      map
    };
  }
  const result = await babel.transformAsync(inputCode, transformOptions);
  const {
    code,
    map
  } = await overrides.result.call(ctx, result, {
    code: inputCode,
    customOptions,
    config,
    transformOptions
  });
  return {
    code,
    map
  };
}

// cache for chunk name filter (includeChunks/excludeChunks)
    let chunkNameFilter;
    return {
      name: 'babel',
      renderStart(outputOptions) {
        const {
          extensions,
          include,
          exclude,
          allowAllFormats
        } = pluginOptionsWithOverrides;
        if (extensions || include || exclude) {
          warnOnce(this, 'The "include", "exclude" and "extensions" options are ignored when transforming the output.');
        }
        if (!allowAllFormats && outputOptions.format !== 'es' && outputOptions.format !== 'cjs') {
          this.error(`Using Babel on the generated chunks is strongly discouraged for formats other than "esm" or "cjs" as it can easily break wrapper code and lead to accidentally created global variables. Instead, you should set "output.format" to "esm" and use Babel to transform to another format, e.g. by adding "presets: [['@babel/env', { modules: '${getRecommendedFormat(outputOptions.format)}' }]]" to your Babel options. If you still want to proceed, add "allowAllFormats: true" to your plugin options.`);
        }
      },
      renderChunk(code, chunk, outputOptions) {
        /* eslint-disable no-unused-vars */
        const {
          allowAllFormats,
          includeChunks,
          excludeChunks,
          exclude,
          extensions,
          externalHelpers,
          externalHelpersWhitelist,
          include,
          runtimeHelpers,
          ...babelOptions
        } = unpackOutputPluginOptions(pluginOptionsWithOverrides, outputOptions);
        /* eslint-enable no-unused-vars */
        // If includeChunks/excludeChunks are specified, filter by chunk.name
        if (includeChunks != null || excludeChunks != null) {
          if (!chunkNameFilter) {
            chunkNameFilter = createFilter(includeChunks, excludeChunks, {
              resolve: false
            });
          }
          if (!chunkNameFilter(chunk.name)) {
            // Skip transforming this chunk
            return null;
          }
        }
        return transformCode(code, babelOptions, overrides, customOptions, this);
      }
    };
  };
}

// export this for symmetry with output-related exports
const getBabelInputPlugin = createBabelInputPluginFactory();
const getBabelOutputPlugin = createBabelOutputPluginFactory();

export { getBabelInputPlugin as babel, createBabelInputPluginFactory, createBabelOutputPluginFactory, getBabelInputPlugin as default, getBabelInputPlugin, getBabelOutputPlugin };
//# sourceMappingURL=index.js.map

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	index.js	13.16 KB	lrw-r--r--	2026-02-28 00:27:22	Edit Download recursive recursive
	package.json	17 B	lrw-r--r--	2026-02-28 00:27:30	Edit Download recursive recursive