f3a3488cda
By default, `rustfmt` persists the import granularity. In practice, most Rust code has import granularity "Module" due to LSP's actions. "Item" gets rid of import groupings and achieves cleaner diffs and better conflict resolution. Better greppability is a positive side effect. Note: it's an unstable rustfmt feature. `cargo +nightly fmt` must be used instead of `cargo fmt`.
67 lines
2 KiB
Rust
67 lines
2 KiB
Rust
/*
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* Copyright (c) 2026-present, the Ladybird developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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use std::env;
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use std::error::Error;
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use std::fmt::Write;
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use std::path::Path;
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use std::path::PathBuf;
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fn generate_opcodes(manifest_dir: &Path, out_dir: &Path) -> Result<(), Box<dyn Error>> {
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let opcode_h = manifest_dir.join("../Opcode.h");
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println!("cargo:rerun-if-changed={}", opcode_h.display());
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let contents = std::fs::read_to_string(&opcode_h)?;
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let mut output = String::new();
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// Grab name and value from _M(name, value, pops, pushes)_ lines
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let re = regex::Regex::new(r"M\(\s*(\w+)\s*,\s*(0x[0-9a-fA-F]+)(?:[uUlL]+)?\s*,")?;
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for cap in re.captures_iter(&contents) {
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let cpp_name = &cap[1];
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let value = &cap[2];
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// Drop "structured_" and trailing underscrores, then uppercase the whole thing.
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let mut name = cpp_name.to_string();
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if let Some(stripped) = name.strip_prefix("structured_") {
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name = stripped.to_string();
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}
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if let Some(stripped) = name.strip_suffix('_') {
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name = stripped.to_string();
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}
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let name = name.to_uppercase();
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writeln!(output, "pub const {name}: u64 = {value};")?;
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}
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std::fs::write(out_dir.join("opcodes.rs"), output)?;
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Ok(())
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}
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fn main() -> Result<(), Box<dyn Error>> {
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let manifest_dir = PathBuf::from(env::var("CARGO_MANIFEST_DIR")?);
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let out_dir = PathBuf::from(env::var("OUT_DIR")?);
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println!("cargo:rerun-if-changed=build.rs");
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println!("cargo:rerun-if-changed=cbindgen.toml");
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generate_opcodes(&manifest_dir, &out_dir)?;
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let ffi_out_dir = env::var("FFI_OUTPUT_DIR")
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.map(PathBuf::from)
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.unwrap_or_else(|_| out_dir.clone());
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cbindgen::generate(manifest_dir).map_or_else(
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|error| match error {
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cbindgen::Error::ParseSyntaxError { .. } => {}
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e => panic!("{e:?}"),
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},
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|bindings| {
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bindings.write_to_file(ffi_out_dir.join("CraneliftFFI.h"));
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},
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);
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Ok(())
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}
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