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import generator from '@babel/generator';
import { transformSync } from '@babel/core';
import type { Program } from '@babel/types';
import { debug } from '@linaria/logger';
import type { Evaluator, StrictOptions } from '@linaria/babel-preset';
import { buildOptions } from '@linaria/babel-preset';
import shake from './shaker';
function prepareForShake(
filename: string,
options: StrictOptions,
code: string
): Program {
const transformOptions = buildOptions(filename, options);
transformOptions.ast = true;
transformOptions.presets!.unshift([
require.resolve('@babel/preset-env'),
{
targets: 'ie 11',
// we need this plugin so we list it explicitly, explanation in `packages/extractor/src/index`
include: ['@babel/plugin-transform-template-literals'],
},
]);
transformOptions.presets!.unshift([
require.resolve('@linaria/preeval'),
options,
]);
transformOptions.plugins!.unshift(
require.resolve('babel-plugin-transform-react-remove-prop-types')
);
transformOptions.plugins!.unshift([
require.resolve('@babel/plugin-transform-runtime'),
{ useESModules: false },
]);
debug(
'evaluator:shaker:transform',
`Transform ${filename} with options ${JSON.stringify(
transformOptions,
null,
2
)}`
);
const transformed = transformSync(code, transformOptions);
if (transformed === null || !transformed.ast) {
throw new Error(`${filename} cannot be transformed`);
}
return transformed.ast.program;
}
const shaker: Evaluator = (filename, options, text, only = null) => {
const [shaken, imports] = shake(
prepareForShake(filename, options, text),
only
);
debug('evaluator:shaker:generate', `Generate shaken source code ${filename}`);
const { code: shakenCode } = generator(shaken!);
return [shakenCode, imports];
};
export default shaker;
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