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use std::collections::BTreeSet;
use serde::ser::{SerializeMap, SerializeTupleStruct, Serializer};
use serde::Serialize;
use serde_starlark::{FunctionCall, MULTILINE};
#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Clone)]
pub struct TargetCompatibleWith {
target_triples: BTreeSet<String>,
}
impl TargetCompatibleWith {
pub fn new(target_triples: BTreeSet<String>) -> Self {
TargetCompatibleWith { target_triples }
}
}
impl Serialize for TargetCompatibleWith {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
// Output looks like:
//
// select({
// "configuration": [],
// "//conditions:default": ["@platforms//:incompatible"],
// })
let mut plus = serializer.serialize_tuple_struct("+", MULTILINE)?;
struct SelectInner<'a>(&'a BTreeSet<String>);
impl<'a> Serialize for SelectInner<'a> {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
let mut map = serializer.serialize_map(Some(MULTILINE))?;
for cfg in self.0 {
map.serialize_entry(cfg, &[] as &[String])?;
}
map.serialize_entry(
"//conditions:default",
&["@platforms//:incompatible".to_owned()] as &[String],
)?;
map.end()
}
}
plus.serialize_field(&FunctionCall::new(
"select",
[SelectInner(&self.target_triples)],
))?;
plus.end()
}
}
#[cfg(test)]
mod test {
use super::*;
use indoc::indoc;
#[test]
fn target_compatible_with() {
let target_compatible_with = TargetCompatibleWith::new(BTreeSet::from([
"@rules_rust//rust/platform:wasm32-unknown-unknown".to_owned(),
"@rules_rust//rust/platform:wasm32-wasi".to_owned(),
"@rules_rust//rust/platform:x86_64-apple-darwin".to_owned(),
"@rules_rust//rust/platform:x86_64-pc-windows-msvc".to_owned(),
"@rules_rust//rust/platform:x86_64-unknown-linux-gnu".to_owned(),
]));
let expected_starlark = indoc! {r#"
select({
"@rules_rust//rust/platform:wasm32-unknown-unknown": [],
"@rules_rust//rust/platform:wasm32-wasi": [],
"@rules_rust//rust/platform:x86_64-apple-darwin": [],
"@rules_rust//rust/platform:x86_64-pc-windows-msvc": [],
"@rules_rust//rust/platform:x86_64-unknown-linux-gnu": [],
"//conditions:default": ["@platforms//:incompatible"],
})
"#};
assert_eq!(
target_compatible_with
.serialize(serde_starlark::Serializer)
.unwrap(),
expected_starlark,
);
}
}
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