Rollup merge of #114379 - RalfJung:command-removed-env-vars, r=m-ou-se

Command: also print removed env vars

There is no real shell syntax for unsetting an env var so easily, so we have to make one up. But we already do that for showing the 'program' name so I hope that's okay here, too. No strong opinion on what that should look like, I went with `unset(VAR_NAME)` for now.

1 files changed, 4 insertions, 0 deletions

diff --git a/library/std/src/sys_common/process.rs b/library/std/src/sys_common/process.rs
index 18883048dae..4d295cf0f09 100644
--- a/library/std/src/sys_common/process.rs
+++ b/library/std/src/sys_common/process.rs
@@ -80,6 +80,10 @@ impl CommandEnv {
         self.vars.clear();
     }
 
+    pub fn does_clear(&self) -> bool {
+        self.clear
+    }
+
     pub fn have_changed_path(&self) -> bool {
         self.saw_path || self.clear
     }