bendns' repos / rust-analyzer
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/project-model/src/rustc_cfg.rs')
-rw-r--r--crates/project-model/src/rustc_cfg.rs99
1 files changed, 0 insertions, 99 deletions
diff --git a/crates/project-model/src/rustc_cfg.rs b/crates/project-model/src/rustc_cfg.rs
deleted file mode 100644
index bc1f0e6fbf..0000000000
--- a/crates/project-model/src/rustc_cfg.rs
+++ /dev/null
@@ -1,99 +0,0 @@
-//! Runs `rustc --print cfg` to get built-in cfg flags.
-
-use anyhow::Context;
-use cfg::CfgAtom;
-use intern::Symbol;
-use rustc_hash::FxHashMap;
-use toolchain::Tool;
-
-use crate::{utf8_stdout, ManifestPath, Sysroot};
-
-/// Determines how `rustc --print cfg` is discovered and invoked.
-pub(crate) enum RustcCfgConfig<'a> {
- /// Use `rustc --print cfg`, either from with the binary from the sysroot or by discovering via
- /// [`toolchain::rustc`].
- Rustc(&'a Sysroot),
- /// Use `cargo --print cfg`, either from with the binary from the sysroot or by discovering via
- /// [`toolchain::cargo`].
- Cargo(&'a Sysroot, &'a ManifestPath),
-}
-
-pub(crate) fn get(
- target: Option<&str>,
- extra_env: &FxHashMap<String, String>,
- config: RustcCfgConfig<'_>,
-) -> Vec<CfgAtom> {
- let _p = tracing::info_span!("rustc_cfg::get").entered();
- let mut res: Vec<_> = Vec::with_capacity(7 * 2 + 1);
-
- // Some nightly-only cfgs, which are required for stdlib
- res.push(CfgAtom::Flag(Symbol::intern("target_thread_local")));
- for key in ["target_has_atomic", "target_has_atomic_load_store"] {
- for ty in ["8", "16", "32", "64", "cas", "ptr"] {
- res.push(CfgAtom::KeyValue { key: Symbol::intern(key), value: Symbol::intern(ty) });
- }
- res.push(CfgAtom::Flag(Symbol::intern(key)));
- }
-
- let rustc_cfgs = get_rust_cfgs(target, extra_env, config);
-
- let rustc_cfgs = match rustc_cfgs {
- Ok(cfgs) => cfgs,
- Err(e) => {
- tracing::error!(?e, "failed to get rustc cfgs");
- return res;
- }
- };
-
- let rustc_cfgs = rustc_cfgs.lines().map(crate::parse_cfg).collect::<Result<Vec<_>, _>>();
-
- match rustc_cfgs {
- Ok(rustc_cfgs) => {
- tracing::debug!(?rustc_cfgs, "rustc cfgs found");
- res.extend(rustc_cfgs);
- }
- Err(e) => {
- tracing::error!(?e, "failed to get rustc cfgs")
- }
- }
-
- res
-}
-
-fn get_rust_cfgs(
- target: Option<&str>,
- extra_env: &FxHashMap<String, String>,
- config: RustcCfgConfig<'_>,
-) -> anyhow::Result<String> {
- let sysroot = match config {
- RustcCfgConfig::Cargo(sysroot, cargo_toml) => {
- let mut cmd = sysroot.tool(Tool::Cargo);
-
- cmd.envs(extra_env);
- cmd.current_dir(cargo_toml.parent())
- .args(["rustc", "-Z", "unstable-options", "--print", "cfg"])
- .env("RUSTC_BOOTSTRAP", "1");
- if let Some(target) = target {
- cmd.args(["--target", target]);
- }
-
- match utf8_stdout(cmd) {
- Ok(it) => return Ok(it),
- Err(e) => {
- tracing::warn!("failed to run `cargo rustc --print cfg`, falling back to invoking rustc directly: {e}");
- sysroot
- }
- }
- }
- RustcCfgConfig::Rustc(sysroot) => sysroot,
- };
-
- let mut cmd = sysroot.tool(Tool::Rustc);
- cmd.envs(extra_env);
- cmd.args(["--print", "cfg", "-O"]);
- if let Some(target) = target {
- cmd.args(["--target", target]);
- }
-
- utf8_stdout(cmd).context("unable to fetch cfgs via `rustc --print cfg -O`")
-}