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Rollup merge of #124320 - Urgau:print-check-cfg, r=petrochenkov

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Add `--print=check-cfg` to get the expected configs

This PR adds a new `--print` variant `check-cfg` to get the expected configs.

Details and rational can be found on the MCP: https://github.com/rust-lang/compiler-team/issues/743

``@rustbot`` label +F-check-cfg +S-waiting-on-MCP
r? ``@petrochenkov``
This commit is contained in:
许杰友 Jieyou Xu (Joe) 2024-05-29 03:25:07 +01:00 • committed by GitHub
commit 7e441a11a1
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8 changed files with 184 additions and 2 deletions
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33
compiler/rustc_driver_impl/src/lib.rs
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@ -804,6 +804,39 @@ fn print_crate_info(
println_info!("{cfg}");
}
}
CheckCfg => {
let mut check_cfgs: Vec<String> = Vec::with_capacity(410);
// INSTABILITY: We are sorting the output below.
#[allow(rustc::potential_query_instability)]
for (name, expected_values) in &sess.psess.check_config.expecteds {
use crate::config::ExpectedValues;
match expected_values {
ExpectedValues::Any => check_cfgs.push(format!("{name}=any()")),
ExpectedValues::Some(values) => {
check_cfgs.extend(values.iter().map(|value| {
if let Some(value) = value {
format!("{name}=\"{value}\"")
} else {
name.to_string()
}
}))
}
}
}
check_cfgs.sort_unstable();
if !sess.psess.check_config.exhaustive_names {
if !sess.psess.check_config.exhaustive_values {
println_info!("any()=any()");
} else {
println_info!("any()");
}
}
for check_cfg in check_cfgs {
println_info!("{check_cfg}");
}
}
CallingConventions => {
let mut calling_conventions = rustc_target::spec::abi::all_names();
calling_conventions.sort_unstable();