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Detect rust-analyzer in build script to enable autocxx completions

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Currently the `autocxx` generated code does not produce any code intelligence
because `rust-analyzer` can't find the generated code since it's not in the
workspace. Here, we detect `rust-analyzer` by checking for a `RUSTC_WRAPPER`
environment variable containing `rust-analyzer` and changing (or avoid changing)
the output directory accordingly.

Closes #9654.
This commit is contained in:
Victor Song 2023-03-12 18:38:39 -04:00 committed by Mahmoud Al-Qudsi
parent 409bf2995d
commit 06547aef54
1 changed files with 10 additions and 3 deletions
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13
fish-rust/build.rs
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@ -48,9 +48,16 @@ fn main() -> miette::Result<()> {
// Emit autocxx junk.
// This allows "C++ to be used from Rust."
let include_paths = [&fish_src_dir, &fish_build_dir, &cxx_include_dir];
let mut b = autocxx_build::Builder::new("src/ffi.rs", include_paths)
.custom_gendir(autocxx_gen_dir.into())
.build()?;
let mut builder = autocxx_build::Builder::new("src/ffi.rs", include_paths);
// Use autocxx's custom output directory unless we're being called by `rust-analyzer` and co.,
// in which case stick to the default target directory so code intelligence continues to work.
if std::env::var("RUSTC_WRAPPER").map_or(true, |wrapper| {
!(wrapper.contains("rust-analyzer") || wrapper.contains("intellij-rust-native-helper"))
}) {
// We need this reassignment because of how the builder pattern works
builder = builder.custom_gendir(autocxx_gen_dir.into());
}
let mut b = builder.build()?;
b.flag_if_supported("-std=c++11")
.flag("-Wno-comment")
.compile("fish-rust-autocxx");