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feat: Codegen feature flags (#28920)

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This commit adds "deno_features" crate that contains definitions of all
unstable features in Deno.

Based on these definitions, both Rust and JS code is generated ensuring
that the two are always in sync.

In addition some of flag handling was rewritten to use the generated
definitions, instead of hand rolling these flag definitions.

---------

Co-authored-by: snek <snek@deno.com>
This commit is contained in:
Bartek Iwańczuk 2025-04-25 10:33:45 +02:00 • committed by GitHub
parent 4924731ac3
commit 189ccffdb9
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19 changed files with 701 additions and 284 deletions
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6
runtime/ops/bootstrap.rs
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@ -96,8 +96,10 @@ pub fn op_bootstrap_user_agent(state: &mut OpState) -> String {
pub fn op_bootstrap_unstable_args(state: &mut OpState) -> Vec<String> {
let options = state.borrow::<BootstrapOptions>();
let mut flags = Vec::with_capacity(options.unstable_features.len());
for granular_flag in crate::UNSTABLE_GRANULAR_FLAGS.iter() {
if options.unstable_features.contains(&granular_flag.id) {
for unstable_feature in &options.unstable_features {
if let Some(granular_flag) =
deno_features::UNSTABLE_FEATURES.get((*unstable_feature) as usize)
{
flags.push(format!("--unstable-{}", granular_flag.name));
}
}