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x/deno/runtime/js.rs

A modern runtime for JavaScript and TypeScript.
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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.use deno_core::Snapshot;use log::debug;use once_cell::sync::Lazy;
pub static CLI_SNAPSHOT: Lazy<Box<[u8]>> = Lazy::new( #[allow(clippy::uninit_vec)] #[cold] #[inline(never)] || { static COMPRESSED_CLI_SNAPSHOT: &[u8] = include_bytes!(concat!(env!("OUT_DIR"), "/CLI_SNAPSHOT.bin"));
let size = u32::from_le_bytes(COMPRESSED_CLI_SNAPSHOT[0..4].try_into().unwrap()) as usize; let mut vec = Vec::with_capacity(size);
// SAFETY: vec is allocated with exact snapshot size (+ alignment) // SAFETY: non zeroed bytes are overwritten with decompressed snapshot unsafe { vec.set_len(size); }
lzzzz::lz4::decompress(&COMPRESSED_CLI_SNAPSHOT[4..], &mut vec).unwrap();
vec.into_boxed_slice() },);
pub fn deno_isolate_init() -> Snapshot { debug!("Deno isolate init with snapshots."); Snapshot::Static(&*CLI_SNAPSHOT)}
#[cfg(test)]mod tests { use super::*;
#[test] fn cli_snapshot() { let mut js_runtime = deno_core::JsRuntime::new(deno_core::RuntimeOptions { startup_snapshot: Some(deno_isolate_init()), ..Default::default() }); js_runtime .execute_script( "<anon>", r#" if (!(bootstrap.mainRuntime && bootstrap.workerRuntime)) { throw Error("bad"); } console.log("we have console.log!!!"); "#, ) .unwrap(); }}