mirror of
https://github.com/vercel-labs/scriptc.git
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Chris TateandAlbert
31f268be2b
* feat: support wasm32-wasi as a production target - Add production LLVM WASI codegen with a 32-bit ABI, coroutines, and dynamic modules - Integrate WASI builds and execution into the CLI with capability diagnostics - Add differential coverage and document the fourth production target Co-authored-by: Albert <57402359+bulatovv@users.noreply.github.com> * fix: address wasm target review findings * fix WASI guest paths and fetch alias detection * fix WASI async bridge and fetch detection --------- Co-authored-by: Albert <57402359+bulatovv@users.noreply.github.com>
40 lines
1.4 KiB
JavaScript
40 lines
1.4 KiB
JavaScript
#!/usr/bin/env node
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/* The subprocess host for `scriptc run` on wasm32-wasi. Keeping the WASI
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* instance outside the CLI process preserves native run's exit isolation:
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* process.exit(), traps, and signals cannot take the compiler process down.
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*/
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import { readFile } from "node:fs/promises";
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import { tmpdir } from "node:os";
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import { WASI } from "node:wasi";
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import { wasiGuestPath } from "@scriptc/compiler";
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import { wasiEnvironment, wasiPreopens } from "./paths.js";
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type WasiInstance = Parameters<WASI["start"]>[0];
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declare const WebAssembly: {
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instantiate(
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bytes: Uint8Array,
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imports: ReturnType<WASI["getImportObject"]>,
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): Promise<{ instance: WasiInstance }>;
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};
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const binary = process.argv[2];
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if (binary === undefined) throw new Error("scriptc WASI runner needs a module path");
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const cwd = process.cwd();
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const hostTmp = tmpdir();
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const wasi = new WASI({
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version: "preview1",
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args: [wasiGuestPath(binary, cwd, hostTmp) ?? binary],
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env: wasiEnvironment(process.env, cwd, hostTmp),
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// A native scriptc executable inherits access to the caller's filesystem.
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// WASI is capability-based, so expose the caller's working tree as `/`
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// and the platform's actual temporary directory as guest `/tmp`.
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preopens: wasiPreopens(cwd, hostTmp),
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returnOnExit: true,
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});
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const instantiated = await WebAssembly.instantiate(
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await readFile(binary),
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wasi.getImportObject(),
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);
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process.exitCode = wasi.start(instantiated.instance);
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