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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,187 +1,4 @@ | ||
| import type { AnyNode, CallExpression } from 'acorn'; | ||
| import { walk } from 'estree-walker'; | ||
| import MagicString from 'magic-string'; | ||
| import type { Plugin, SourceMap } from 'rollup'; | ||
| import { transpileFn } from 'tinyest-for-wgsl'; | ||
| import rollupPlugin from 'unplugin-typegpu/rollup'; | ||
| export { type TypegpuPluginOptions } from 'unplugin-typegpu'; | ||
|
|
||
| const typegpuImportRegex = /import.*from\s*['"]typegpu.*['"]/g; | ||
| const typegpuDynamicImportRegex = /import\s*\(\s*['"]\s*typegpu.*['"]/g; | ||
| const typegpuRequireRegex = /require\s*\(\s*['"]\s*typegpu.*['"]\s*\)/g; | ||
|
|
||
| type Context = { | ||
| /** | ||
| * How the `tgpu` object is used in code. Since it can be aliased, we | ||
| * need to catch that and act accordingly. | ||
| */ | ||
| tgpuAliases: Set<string>; | ||
| }; | ||
|
|
||
| type TgslFunctionDef = { | ||
| varDecl: CallExpression; | ||
| implementation: AnyNode; | ||
| }; | ||
|
|
||
| function embedJSON(jsValue: unknown) { | ||
| return JSON.stringify(jsValue) | ||
| .replace(/\u2028/g, '\\u2028') | ||
| .replace(/\u2029/g, '\\u2029'); | ||
| } | ||
|
|
||
| function gatherTgpuAliases(ctx: Context, node: AnyNode) { | ||
| if (node.type === 'ImportDeclaration') { | ||
| if (node.source.value === 'typegpu') { | ||
| for (const spec of node.specifiers) { | ||
| if ( | ||
| // The default export of 'typegpu' is the `tgpu` object. | ||
| spec.type === 'ImportDefaultSpecifier' || | ||
| // Aliasing 'tgpu' while importing, e.g. import { tgpu as t } from 'typegpu'; | ||
| (spec.type === 'ImportSpecifier' && | ||
| spec.imported.type === 'Identifier' && | ||
| spec.imported.name === 'tgpu') | ||
| ) { | ||
| ctx.tgpuAliases.add(spec.local.name); | ||
| } else if (spec.type === 'ImportNamespaceSpecifier') { | ||
| // Importing everything, e.g. import * as t from 'typegpu'; | ||
| ctx.tgpuAliases.add(`${spec.local.name}.tgpu`); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Checks if `node` is an alias for the 'tgpu' object, traditionally | ||
| * available via `import tgpu from 'typegpu'`. | ||
| */ | ||
| function isTgpu(ctx: Context, node: AnyNode): boolean { | ||
| let path = ''; | ||
|
|
||
| let tail = node; | ||
| while (true) { | ||
| if (tail.type === 'MemberExpression') { | ||
| if (tail.property.type !== 'Identifier') { | ||
| // Not handling computed expressions. | ||
| break; | ||
| } | ||
|
|
||
| path = path ? `${tail.property.name}.${path}` : tail.property.name; | ||
| tail = tail.object; | ||
| } else if (tail.type === 'Identifier') { | ||
| path = path ? `${tail.name}.${path}` : tail.name; | ||
| break; | ||
| } else { | ||
| break; | ||
| } | ||
| } | ||
|
|
||
| return ctx.tgpuAliases.has(path); | ||
| } | ||
|
|
||
| export interface TypegpuPluginOptions { | ||
| include?: 'all' | RegExp[]; | ||
| } | ||
|
|
||
| export interface TypegpuPlugin { | ||
| name: 'rollup-plugin-typegpu'; | ||
| transform( | ||
| code: string, | ||
| id: string, | ||
| ): { code: string; map: SourceMap } | undefined; | ||
| } | ||
|
|
||
| export default function typegpu(options?: TypegpuPluginOptions): TypegpuPlugin { | ||
| return { | ||
| name: 'rollup-plugin-typegpu' as const, | ||
| transform(code, id) { | ||
| if (!options?.include) { | ||
| if ( | ||
| !typegpuImportRegex.test(code) && | ||
| !typegpuRequireRegex.test(code) && | ||
| !typegpuDynamicImportRegex.test(code) | ||
| ) { | ||
| // No imports to `typegpu` or its sub modules, exiting early. | ||
| return; | ||
| } | ||
| } else if ( | ||
| options.include !== 'all' && | ||
| !options.include.some((pattern) => pattern.test(id)) | ||
| ) { | ||
| return; | ||
| } | ||
|
|
||
| const ctx: Context = { | ||
| tgpuAliases: new Set(['tgpu']), | ||
| }; | ||
|
|
||
| const ast = this.parse(code, { | ||
| allowReturnOutsideFunction: true, | ||
| }); | ||
|
|
||
| const tgslFunctionDefs: TgslFunctionDef[] = []; | ||
|
|
||
| walk(ast, { | ||
| enter(_node, _parent, prop, index) { | ||
| const node = _node as AnyNode; | ||
|
|
||
| gatherTgpuAliases(ctx, node); | ||
|
|
||
| if (node.type === 'CallExpression') { | ||
| if ( | ||
| node.callee.type === 'MemberExpression' && | ||
| node.arguments.length === 1 && | ||
| node.callee.property.type === 'Identifier' && | ||
| ((node.callee.property.name === 'procedure' && | ||
| isTgpu(ctx, node.callee.object)) || | ||
| // Assuming that every call to `.does` is related to TypeGPU | ||
| // because shells can be created separately from calls to `tgpu`, | ||
| // making it hard to detect. | ||
| node.callee.property.name === 'does') | ||
| ) { | ||
| const implementation = node.arguments[0]; | ||
|
|
||
| if ( | ||
| implementation && | ||
| !(implementation.type === 'TemplateLiteral') && | ||
| !(implementation.type === 'Literal') | ||
| ) { | ||
| tgslFunctionDefs.push({ | ||
| varDecl: node, | ||
| implementation, | ||
| }); | ||
| } | ||
| } | ||
| } | ||
| }, | ||
| }); | ||
|
|
||
| const magicString = new MagicString(code); | ||
|
|
||
| for (const expr of tgslFunctionDefs) { | ||
| const { argNames, body, externalNames } = transpileFn( | ||
| expr.implementation, | ||
| ); | ||
|
|
||
| // Wrap the implementation in a call to `tgpu.__assignAst` to associate the AST with the implementation. | ||
| magicString.appendLeft(expr.implementation.start, 'tgpu.__assignAst('); | ||
| magicString.appendRight( | ||
| expr.implementation.end, | ||
| `, ${embedJSON({ argNames, body, externalNames })}`, | ||
| ); | ||
|
|
||
| if (externalNames.length > 0) { | ||
| magicString.appendRight( | ||
| expr.implementation.end, | ||
| `, {${externalNames.join(', ')}})`, | ||
| ); | ||
| } else { | ||
| magicString.appendRight(expr.implementation.end, ', undefined)'); | ||
| } | ||
| } | ||
|
|
||
| return { | ||
| code: magicString.toString(), | ||
| map: magicString.generateMap(), | ||
| }; | ||
| }, | ||
| } satisfies Plugin; | ||
| } | ||
| export default rollupPlugin; |
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