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chore: move all of transform.js into @endo/transforms
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1 @@ | ||
| export * from './src/index.js'; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,2 +1,97 @@ | ||
| // place holder to unwedge lint | ||
| export {}; | ||
| import babelGenerate from '@agoric/babel-generator'; | ||
| import babelTraverse from '@babel/traverse'; | ||
| import * as babelParser from '@babel/parser'; | ||
| import { makeLocationUnmapper } from './location-unmapper.js'; | ||
| import { evadeCensor } from './evade-censor.js'; | ||
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| export * from './evade-censor.js'; | ||
| export * from './location-unmapper.js'; | ||
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| /** @type {typeof import('@babel/traverse')} */ | ||
| const { default: traverse } = /** @type {any} */ (babelTraverse); | ||
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| /** @type {typeof import('@babel/generator')} */ | ||
| const { default: generate } = /** @type {any} */ (babelGenerate); | ||
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| const { parse: parseBabel } = babelParser; | ||
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| /** | ||
| * Transforms AST by rewriting comments | ||
| * @internal | ||
| * @param {import('@babel/types').File} ast | ||
| * @param {import('./location-unmapper.js').LocationUnmapper} [unmapLoc] | ||
| * @returns {void} | ||
| */ | ||
| function transformAst(ast, unmapLoc) { | ||
| traverse(ast, { | ||
| enter(p) { | ||
| const { loc, leadingComments, innerComments, trailingComments, type } = | ||
| p.node; | ||
| // discriminated union | ||
| if ('comments' in p.node) { | ||
| (p.node.comments || []).forEach(node => evadeCensor(node, unmapLoc)); | ||
| } | ||
| // Rewrite all comments. | ||
| (leadingComments || []).forEach(node => evadeCensor(node, unmapLoc)); | ||
| // XXX: there is no such Node having type matching /^Comment.+/ in | ||
| // @babel/types | ||
| if (type.startsWith('Comment')) { | ||
| // @ts-expect-error - see above XXX | ||
| evadeCensor(p.node, unmapLoc); | ||
| } | ||
| (innerComments || []).forEach(node => evadeCensor(node, unmapLoc)); | ||
| // If not a comment, and we are unmapping the source maps, | ||
| // then do it for this location. | ||
| if (unmapLoc) { | ||
| unmapLoc(loc); | ||
| } | ||
| (trailingComments || []).forEach(node => evadeCensor(node, unmapLoc)); | ||
| }, | ||
| }); | ||
| } | ||
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| /** | ||
| * Apply source transforms on the given code and source map | ||
| * | ||
| * @param {string} code - Code to transform | ||
| * @param {string} sourceMap - Original source map | ||
| * @param {string} sourceMapUrl - URL of original source map | ||
| * @param {TransformSourceOptions} options - Options for the transform | ||
| * @returns {Promise<import('@agoric/babel-generator').GeneratorResult>} Object | ||
| * containing new code and source map | ||
| */ | ||
| export async function transformSource( | ||
| code, | ||
| sourceMap, | ||
| sourceMapUrl, | ||
| { useLocationUnmap, sourceType } = {}, | ||
| ) { | ||
| await null; | ||
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| // Parse the rolled-up chunk with Babel. | ||
| // We are prepared for different module systems. | ||
| const ast = parseBabel(code, { | ||
| sourceType, | ||
| }); | ||
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| let unmapLoc; | ||
| if (useLocationUnmap) { | ||
| unmapLoc = await makeLocationUnmapper(sourceMap, ast); | ||
| } | ||
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| transformAst(ast, unmapLoc); | ||
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| // Now generate the sources with the new positions. | ||
| return generate(ast, { | ||
| sourceFileName: sourceMapUrl, | ||
| sourceMaps: true, | ||
| retainLines: true, | ||
| compact: true, | ||
| }); | ||
| } | ||
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| /** | ||
| * @typedef TransformSourceOptions | ||
| * @property {boolean} [useLocationUnmap] | ||
| * @property {import('@babel/parser').ParserOptions['sourceType']} [sourceType] | ||
| */ |
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