acorn-zimmerframe-improts-exports.ts

import { parse, type Literal } from 'acorn';
import { type Node } from 'estree-walker';
import { walk } from 'zimmerframe';

const ast = parse(output, {
  ecmaVersion: 2022,
  sourceType: 'module',
  sourceFile: full_path,
});

const imports_exports = new Map<string, Set<[number, number]>>();

walk(ast as Node, imports_exports, {
  _(node, { state, next }) {
    const node_types: (typeof node)['type'][] = [
      'ImportExpression',
      'ImportDeclaration',
      'ExportNamedDeclaration',
      'ExportAllDeclaration',
      'ExportDefaultDeclaration',
    ];

    if (!node_types.includes(node.type)) {
      return next(state);
    }

    if ('source' in node && node.source != null && 'value' in node.source) {
      const typed_node_source = node.source as Literal;
      if (!state.has(typed_node_source.value + '')) {
        state.set(typed_node_source.value + '', new Set());
      }

      state
        .get(typed_node_source.value + '')
        ?.add([typed_node_source.start, typed_node_source.end]);
    }

    next(state);
  },
});