927bf229a4
bit cleaner, esp. as less hardcoding of "debug" path instant updates all the way through to Haskell when we change Rust code (this wasn't actually working at all before even when we did manually run the script, because TH file-dependency tracking seemed to get confused with the way that the Bash code moved a file to the header path rather than editing it) should update to point to my comment on hs-bindgen actually, isn't there a race condition here? the header files are generated before the new Rust code is actually compiled, and Cabal could in theory end up still linking against the old output hardcoding "target" isn't great, though we do already do so in the Cabal file there seems to be no env var for it though docs suggest we're supposed to use OUT_DIR, but that has an unpredictable path... we could output the dir somewhere I suppose, and configure Cabal to use that, but that adds a fair bit of complexity look in to https://doc.rust-lang.org/cargo/reference/build-scripts.html#change-detection? bit blunt compared to e.g. Cabal Hooks, and anyway I think in the long run I'll be ditching `build.rs`, as discussed above
44 lines
1.2 KiB
Rust
44 lines
1.2 KiB
Rust
use std::env;
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use std::fs;
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use std::path::PathBuf;
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fn main() {
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let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
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let profile = env::var("PROFILE").unwrap();
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let bindings = cbindgen::Builder::new()
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.with_crate(&crate_dir)
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.with_language(cbindgen::Language::C)
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.with_style(cbindgen::Style::Tag)
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.generate()
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.expect("Unable to generate bindings");
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// TODO vibe-coded workaround for hs-bindgen issue: https://github.com/well-typed/hs-bindgen/issues/1649
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// would otherwise just use `.write_to_file`
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let mut buf = Vec::new();
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bindings.write(&mut buf);
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let header = String::from_utf8(buf).unwrap();
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let mut patched = String::new();
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let mut saw_union = false;
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for line in header.lines() {
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if line == " };" && saw_union {
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patched.push_str(" } body;\n");
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saw_union = false;
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continue;
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}
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if line == " union {" {
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saw_union = true;
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}
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patched.push_str(line);
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patched.push('\n');
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}
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fs::write(
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PathBuf::from(&crate_dir)
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.join("target")
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.join(&profile)
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.join("garnet_rs.h"),
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patched,
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)
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.unwrap();
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}
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