Migrate code to `gl-matrix` v4

migrate.js

import babel from '@babel/core';
import traverse from '@babel/traverse';
import generator from '@babel/generator';

function capitalizeFirstLetter(string) {
    return string.charAt(0).toUpperCase() + string.slice(1);
}

function migrate() {
    const input = `
    import {mat2} from 'gl-matrix';
    import {mat3, mat4} from 'gl-matrix';

    import type {vec2} from 'gl-matrix';
    import type {vec3, vec4} from 'gl-matrix';
    `;

    const ast = babel.parse(input, {
        sourceType: 'module',
        plugins: ['@babel/plugin-transform-typescript']
    });

    traverse.default(ast, {
        ImportDeclaration(path) {
            const source = path.node.source.value;
            if (source === 'gl-matrix') {
                if (path.node.specifiers.length === 1) {
                    const specifier = path.node.specifiers[0];
                    path.node.source.value = `gl-matrix/dist/esm/f64/${specifier.local.name}.js`;
                    specifier.local.name = capitalizeFirstLetter(specifier.local.name);
                    specifier.imported.name = capitalizeFirstLetter(specifier.imported.name);
                } else {
                    const imports = [];
                    for (const specifier of path.node.specifiers) {
                        const importDeclaration = babel.types.importDeclaration(
                            [specifier],
                            babel.types.stringLiteral(`gl-matrix/dist/esm/f64/${specifier.local.name}.js`)
                        );

                        // Use the same import kind as the original import
                        importDeclaration.importKind = path.node.importKind;

                        specifier.local.name = capitalizeFirstLetter(specifier.local.name);
                        specifier.imported.name = capitalizeFirstLetter(specifier.imported.name);

                        imports.push(importDeclaration);
                    }

                    path.replaceWithMultiple(imports);
                }
            }
        }
    });

    const {code: output} = generator.default(ast);

    console.log('\n\n');
    console.log(input);
    console.log('\n\n');
    console.log(output);
    console.log('\n\n');
}

migrate();