1
0
Fork 0
mirror of https://github.com/denoland/deno.git synced 2024-12-30 11:16:38 -05:00
denoland-deno/runtime/js.rs
Nayeem Rahman c1c8eb3d55
build: allow disabling snapshots for dev (#20048)
Closes #19399 (running without snapshots at all was suggested as an
alternative solution).

Adds a `__runtime_js_sources` pseudo-private feature to load extension
JS sources at runtime for faster development, instead of building and
loading snapshots or embedding sources in the binary. Will only work in
a development environment obviously.

Try running `cargo test --features __runtime_js_sources
integration::node_unit_tests::os_test`. Then break some behaviour in
`ext/node/polyfills/os.ts` e.g. make `function cpus() {}` return an
empty array, and run it again. Fix and then run again. No more build
time in between.
2023-08-06 01:47:15 +02:00

26 lines
837 B
Rust

// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
use deno_core::Snapshot;
use log::debug;
#[cfg(not(feature = "dont_create_runtime_snapshot"))]
static RUNTIME_SNAPSHOT: &[u8] =
include_bytes!(concat!(env!("OUT_DIR"), "/RUNTIME_SNAPSHOT.bin"));
pub fn deno_isolate_init() -> Option<Snapshot> {
debug!("Deno isolate init with snapshots.");
#[cfg(not(feature = "dont_create_runtime_snapshot"))]
{
Some(Snapshot::Static(RUNTIME_SNAPSHOT))
}
#[cfg(feature = "dont_create_runtime_snapshot")]
{
None
}
}
#[cfg(not(feature = "include_js_files_for_snapshotting"))]
pub static SOURCE_CODE_FOR_99_MAIN_JS: &str = include_str!("js/99_main.js");
#[cfg(feature = "include_js_files_for_snapshotting")]
pub static PATH_FOR_99_MAIN_JS: &str =
concat!(env!("CARGO_MANIFEST_DIR"), "/js/99_main.js");