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build.rs
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build.rs
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use std::ops::{Deref, DerefMut};
use std::path::PathBuf;
#[cfg(feature = "universal2")]
use std::process::Stdio;
use std::process::{self, Child, Command};
use anyhow::{Context, Result};
use clap::Parser;
use crate::zig::Zig;
/// Compile a local package and all of its dependencies
/// using zig as the linker
#[derive(Clone, Debug, Default, Parser)]
#[command(
after_help = "Run `cargo help build` for more detailed information.",
display_order = 1
)]
pub struct Build {
#[command(flatten)]
pub cargo: cargo_options::Build,
/// Disable zig linker
#[arg(skip)]
pub disable_zig_linker: bool,
/// Enable zig ar
#[arg(skip)]
pub enable_zig_ar: bool,
}
impl Build {
/// Create a new build from manifest path
#[allow(clippy::field_reassign_with_default)]
pub fn new(manifest_path: Option<PathBuf>) -> Self {
let mut build = Self::default();
build.manifest_path = manifest_path;
build
}
/// Execute `cargo build` command with zig as the linker
pub fn execute(&self) -> Result<()> {
let has_universal2 = self
.cargo
.target
.contains(&"universal2-apple-darwin".to_string());
let mut build = self.build_command()?;
let mut child = build.spawn().context("Failed to run cargo build")?;
if has_universal2 {
self.handle_universal2_build(child)?;
} else {
let status = child.wait().expect("Failed to wait on cargo build process");
if !status.success() {
process::exit(status.code().unwrap_or(1));
}
}
Ok(())
}
#[cfg(not(feature = "universal2"))]
fn handle_universal2_build(&self, mut _child: Child) -> Result<()> {
anyhow::bail!("Unsupported Rust target: universal2-apple-darwin")
}
#[cfg(feature = "universal2")]
fn handle_universal2_build(&self, mut child: Child) -> Result<()> {
use cargo_metadata::Message;
use std::io::BufReader;
use std::path::Path;
// Find root crate package id
let manifest_path = self
.manifest_path
.as_deref()
.unwrap_or_else(|| Path::new("Cargo.toml"));
let mut metadata_cmd = cargo_metadata::MetadataCommand::new();
metadata_cmd.manifest_path(manifest_path);
let metadata = metadata_cmd.exec()?;
let root_pkg = metadata.root_package().expect("Should have a root package");
let mut x86_64_artifacts = Vec::new();
let mut aarch64_artifacts = Vec::new();
let stream = child
.stdout
.take()
.expect("Cargo build should have a stdout");
for message in Message::parse_stream(BufReader::new(stream)) {
let message = message.context("Failed to parse cargo metadata message")?;
match message {
Message::CompilerArtifact(artifact) => {
if artifact.package_id == root_pkg.id {
for filename in artifact.filenames {
if filename.as_str().contains("x86_64-apple-darwin") {
x86_64_artifacts.push(filename);
} else if filename.as_str().contains("aarch64-apple-darwin") {
aarch64_artifacts.push(filename);
}
}
}
}
Message::CompilerMessage(msg) => {
println!("{}", msg.message);
}
_ => {}
}
}
let status = child.wait().expect("Failed to wait on cargo build process");
if !status.success() {
process::exit(status.code().unwrap_or(1));
}
// create fat binaries for artifacts
for (x86_64_path, aarch64_path) in x86_64_artifacts
.into_iter()
.zip(aarch64_artifacts.into_iter())
{
let mut fat = fat_macho::FatWriter::new();
match fat.add(fs_err::read(&x86_64_path)?) {
Err(fat_macho::Error::InvalidMachO(_)) => continue,
Err(e) => return Err(e)?,
Ok(()) => {}
}
match fat.add(fs_err::read(&aarch64_path)?) {
Err(fat_macho::Error::InvalidMachO(_)) => continue,
Err(e) => return Err(e)?,
Ok(()) => {}
}
let universal2_path = PathBuf::from(
x86_64_path
.to_string()
.replace("x86_64-apple-darwin", "universal2-apple-darwin"),
);
let universal2_dir = universal2_path.parent().unwrap();
fs_err::create_dir_all(universal2_dir)?;
fat.write_to_file(universal2_path)?;
}
Ok(())
}
/// Generate cargo subcommand
#[cfg(not(feature = "universal2"))]
pub fn build_command(&self) -> Result<Command> {
let mut build = self.cargo.command();
if !self.disable_zig_linker {
Zig::apply_command_env(
self.manifest_path.as_deref(),
self.release,
&self.cargo.common,
&mut build,
self.enable_zig_ar,
)?;
}
Ok(build)
}
/// Generate cargo subcommand
#[cfg(feature = "universal2")]
pub fn build_command(&self) -> Result<Command> {
let build = if let Some(index) = self
.cargo
.target
.iter()
.position(|t| t == "universal2-apple-darwin")
{
let mut cargo = self.cargo.clone();
cargo.target.remove(index);
if !cargo.target.contains(&"x86_64-apple-darwin".to_string()) {
cargo.target.push("x86_64-apple-darwin".to_string());
}
if !cargo.target.contains(&"aarch64-apple-darwin".to_string()) {
cargo.target.push("aarch64-apple-darwin".to_string());
}
if !cargo.message_format.iter().any(|f| f.starts_with("json")) {
cargo.message_format.push("json".to_string());
}
let mut build = cargo.command();
build.stdout(Stdio::piped()).stderr(Stdio::inherit());
if !self.disable_zig_linker {
Zig::apply_command_env(
self.manifest_path.as_deref(),
self.release,
&cargo.common,
&mut build,
self.enable_zig_ar,
)?;
}
build
} else {
let mut build = self.cargo.command();
if !self.disable_zig_linker {
Zig::apply_command_env(
self.manifest_path.as_deref(),
self.release,
&self.cargo.common,
&mut build,
self.enable_zig_ar,
)?;
}
build
};
Ok(build)
}
}
impl Deref for Build {
type Target = cargo_options::Build;
fn deref(&self) -> &Self::Target {
&self.cargo
}
}
impl DerefMut for Build {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.cargo
}
}
impl From<cargo_options::Build> for Build {
fn from(cargo: cargo_options::Build) -> Self {
Self {
cargo,
..Default::default()
}
}
}