| 1 | /** Syntax preparation for Bun runtime imports; parsing never evaluates plugin code. */ |
| 2 | import { parse } from 'acorn' |
| 3 | import { pathToFileURL } from 'node:url' |
| 4 | |
| 5 | export const REVIEWED_IMPORT = Symbol.for('codewhale.extension-host.reviewed-import') |
| 6 | |
| 7 | /** Keep module identity and import.meta source paths; guard every syntactic edge. */ |
| 8 | export function prepareBunSource(source: string, path: string, checked: (specifier: string, require: boolean) => string): string { |
| 9 | const tree = parse(source, { ecmaVersion: 'latest', sourceType: path.endsWith('.cjs') ? 'commonjs' : 'module' }) |
| 10 | const pending: object[] = [tree] |
| 11 | const edits: { start: number; end: number; source: string }[] = [] |
| 12 | let nodes = 0 |
| 13 | while (pending.length) { |
| 14 | const node = pending.pop() as Record<string, any> |
| 15 | if (++nodes > 500_000) throw new Error('reviewed module syntax exceeds the preparation bound') |
| 16 | if (['ImportDeclaration', 'ExportNamedDeclaration', 'ExportAllDeclaration'].includes(node.type) && node.source) { |
| 17 | const target = checked(node.source.value, false) |
| 18 | edits.push({start:node.source.start,end:node.source.end,source:JSON.stringify(target)}) |
| 19 | } |
| 20 | if (node.type === 'ImportExpression') { |
| 21 | // The source expression remains unevaluated until the original call site. |
| 22 | // The host helper then checks its exact receipt, including computed edges. |
| 23 | edits.push({start:node.start,end:node.start+6,source:`globalThis[Symbol.for(${JSON.stringify(REVIEWED_IMPORT.description)})]`}) |
| 24 | edits.push({start:node.source.end,end:node.source.end,source:`,${JSON.stringify(pathToFileURL(path).href)}`}) |
| 25 | } |
| 26 | if (node.type === 'CallExpression' && node.callee.type === 'Identifier' && node.callee.name === 'require') { |
| 27 | if (node.arguments.length !== 1 || node.arguments[0].type !== 'Literal' || typeof node.arguments[0].value !== 'string') { |
| 28 | throw new Error('computed composition require calls require the diagnosed Node resolver') |
| 29 | } |
| 30 | const argument=node.arguments[0] |
| 31 | edits.push({start:argument.start,end:argument.end,source:JSON.stringify(checked(argument.value,true))}) |
| 32 | } |
| 33 | if (node.type === 'MemberExpression' && !node.computed |
| 34 | && ((node.object.type==='MetaProperty' && node.property.name==='require') |
| 35 | || (node.object.type==='Identifier' && node.object.name==='require' && node.property.name==='resolve'))) { |
| 36 | throw new Error('runtime composition require resolution requires the diagnosed Node resolver') |
| 37 | } |
| 38 | for (const value of Object.values(node)) { |
| 39 | if (Array.isArray(value)) { |
| 40 | for (const child of value) if (child && typeof child === 'object' && typeof child.type === 'string') pending.push(child) |
| 41 | } else if (value && typeof value === 'object' && typeof value.type === 'string') pending.push(value) |
| 42 | } |
| 43 | } |
| 44 | for (const edit of edits.sort((a,b)=>b.start-a.start || b.end-a.end)) source=source.slice(0,edit.start)+edit.source+source.slice(edit.end) |
| 45 | return source |
| 46 | } |
| 47 |