Rollup merge of #117322 - onur-ozkan:fix-suppressed-outputs, r=Kobzol

change default output mode of `BootstrapCommand`

`SuppressOnSuccess` on `BootstrapCommand` is a problematic default mode as it affects the logs during the bootstrapping (as shown in the screenshot below). The default behavior should be to print everything unless we explicitly modify the behavior within build steps.

![image](https://github.com/rust-lang/rust/assets/39852038/8dbaaeb2-0656-4ff9-8e48-1ac0734a913f)

Fixes #117315

cc `@Kobzol`

Author: workingjubilee

Diff for: src/bootstrap/src/lib.rs

@@ -586,7 +586,11 @@ impl Build {
                     .args(&["diff-index", "--quiet", "HEAD"])
                     .current_dir(&absolute_path),
             )
-            .allow_failure(),
+            .allow_failure()
+            .output_mode(match self.is_verbose() {
+                true => OutputMode::PrintAll,
+                false => OutputMode::PrintOutput,
+            }),
         );
         if has_local_modifications {
             self.run(Command::new("git").args(&["stash", "push"]).current_dir(&absolute_path));

Diff for: src/bootstrap/src/utils/exec.rs

@@ -54,7 +54,7 @@ impl<'a> From<&'a mut Command> for BootstrapCommand<'a> {
         Self {
             command,
             failure_behavior: BehaviorOnFailure::Exit,
-            output_mode: OutputMode::SuppressOnSuccess,
+            output_mode: OutputMode::PrintAll,
         }
     }
 }