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Auto merge of #3421 - RalfJung:remove-remove-var, r=RalfJung

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avoid mutating the global environment

`remove_var` is just as bad as `set_var`, let's not do that.
This commit is contained in:
bors 2024-03-26 16:09:03 +00:00
commit 3c041c4e45
2 changed files with 6 additions and 11 deletions
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10
src/tools/miri/cargo-miri/src/phases.rs
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@ -301,11 +301,6 @@ pub fn phase_rustc(mut args: impl Iterator<Item = String>, phase: RustcPhase) {
}
}
// phase_cargo_miri set `MIRI_BE_RUSTC` for when build scripts directly invoke the driver;
// however, if we get called back by cargo here, we'll carefully compute the right flags
// ourselves, so we first un-do what the earlier phase did.
env::remove_var("MIRI_BE_RUSTC");
let verbose = std::env::var("MIRI_VERBOSE")
.map_or(0, |verbose| verbose.parse().expect("verbosity flag must be an integer"));
let target_crate = is_target_crate();
@ -489,11 +484,6 @@ pub enum RunnerPhase {
}
pub fn phase_runner(mut binary_args: impl Iterator<Item = String>, phase: RunnerPhase) {
// phase_cargo_miri set `MIRI_BE_RUSTC` for when build scripts directly invoke the driver;
// however, if we get called back by cargo here, we'll carefully compute the right flags
// ourselves, so we first un-do what the earlier phase did.
env::remove_var("MIRI_BE_RUSTC");
let verbose = std::env::var("MIRI_VERBOSE")
.map_or(0, |verbose| verbose.parse().expect("verbosity flag must be an integer"));

7
src/tools/miri/cargo-miri/src/util.rs
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@ -101,7 +101,12 @@ pub fn find_miri() -> PathBuf {
}
pub fn miri() -> Command {
Command::new(find_miri())
let mut cmd = Command::new(find_miri());
// We never want to inherit this from the environment.
// However, this is sometimes set in the environment to work around build scripts that don't
// honor RUSTC_WRAPPER. So remove it again in case it is set.
cmd.env_remove("MIRI_BE_RUSTC");
cmd
}
pub fn miri_for_host() -> Command {