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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
pub mod convert;
#[inline(always)]
pub fn get_v8_flags_from_env() -> Vec<String> {
std::env::var("DENO_V8_FLAGS")
.ok()
.map(|flags| flags.split(',').map(String::from).collect::<Vec<String>>())
.unwrap_or_default()
}
#[inline(always)]
pub fn construct_v8_flags(
default_v8_flags: &[String],
v8_flags: &[String],
env_v8_flags: Vec<String>,
) -> Vec<String> {
std::iter::once("UNUSED_BUT_NECESSARY_ARG0".to_owned())
.chain(default_v8_flags.iter().cloned())
.chain(env_v8_flags)
.chain(v8_flags.iter().cloned())
.collect::<Vec<_>>()
}
pub fn init_v8_flags(
default_v8_flags: &[String],
v8_flags: &[String],
env_v8_flags: Vec<String>,
) {
if default_v8_flags.is_empty()
&& v8_flags.is_empty()
&& env_v8_flags.is_empty()
{
return;
}
let v8_flags_includes_help = env_v8_flags
.iter()
.chain(v8_flags)
.any(|flag| flag == "-help" || flag == "--help");
// Keep in sync with `standalone.rs`.
let v8_flags = construct_v8_flags(default_v8_flags, v8_flags, env_v8_flags);
let unrecognized_v8_flags = deno_core::v8_set_flags(v8_flags)
.into_iter()
.skip(1)
.collect::<Vec<_>>();
if !unrecognized_v8_flags.is_empty() {
for f in unrecognized_v8_flags {
log::error!("error: V8 did not recognize flag '{f}'");
}
log::error!("\nFor a list of V8 flags, use '--v8-flags=--help'");
deno_runtime::exit(1);
}
if v8_flags_includes_help {
deno_runtime::exit(0);
}
}
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