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internal: tool discovery prefers sysroot tools

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This commit is contained in:
Lukas Wirth 2024-02-12 12:08:18 +01:00
parent ddf105b646
commit 8f3209ba27
14 changed files with 406 additions and 250 deletions
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46
crates/project-model/src/target_data_layout.rs
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@ -3,16 +3,27 @@ use std::process::Command;
use rustc_hash::FxHashMap;
use crate::{utf8_stdout, ManifestPath};
use crate::{utf8_stdout, ManifestPath, Sysroot};
/// Determines how `rustc --print target-spec-json` is discovered and invoked.
pub enum RustcDataLayoutConfig<'a> {
/// Use `rustc --print target-spec-json`, either from with the binary from the sysroot or by discovering via
/// [`toolchain::rustc`].
Rustc(Option<&'a Sysroot>),
/// Use `cargo --print target-spec-json`, either from with the binary from the sysroot or by discovering via
/// [`toolchain::cargo`].
Cargo(Option<&'a Sysroot>, &'a ManifestPath),
}
pub fn get(
cargo_toml: Option<&ManifestPath>,
config: RustcDataLayoutConfig<'_>,
target: Option<&str>,
extra_env: &FxHashMap<String, String>,
) -> anyhow::Result<String> {
let output = (|| {
if let Some(cargo_toml) = cargo_toml {
let mut cmd = Command::new(toolchain::rustc());
let output = match config {
RustcDataLayoutConfig::Cargo(sysroot, cargo_toml) => {
let cargo = Sysroot::discover_tool(sysroot, toolchain::Tool::Cargo)?;
let mut cmd = Command::new(cargo);
cmd.envs(extra_env);
cmd.current_dir(cargo_toml.parent())
.args(["-Z", "unstable-options", "--print", "target-spec-json"])
@ -20,21 +31,20 @@ pub fn get(
if let Some(target) = target {
cmd.args(["--target", target]);
}
match utf8_stdout(cmd) {
Ok(it) => return Ok(it),
Err(e) => tracing::debug!("{e:?}: falling back to querying rustc for cfgs"),
utf8_stdout(cmd)
}
RustcDataLayoutConfig::Rustc(sysroot) => {
let rustc = Sysroot::discover_tool(sysroot, toolchain::Tool::Rustc)?;
let mut cmd = Command::new(rustc);
cmd.envs(extra_env)
.args(["-Z", "unstable-options", "--print", "target-spec-json"])
.env("RUSTC_BOOTSTRAP", "1");
if let Some(target) = target {
cmd.args(["--target", target]);
}
utf8_stdout(cmd)
}
// using unstable cargo features failed, fall back to using plain rustc
let mut cmd = Command::new(toolchain::rustc());
cmd.envs(extra_env)
.args(["-Z", "unstable-options", "--print", "target-spec-json"])
.env("RUSTC_BOOTSTRAP", "1");
if let Some(target) = target {
cmd.args(["--target", target]);
}
utf8_stdout(cmd)
})()?;
}?;
(|| Some(output.split_once(r#""data-layout": ""#)?.1.split_once('"')?.0.to_owned()))()
.ok_or_else(|| anyhow::format_err!("could not fetch target-spec-json from command output"))
}