Make command field of BootstrapCommand private to force access to it through the as_command_mut method

This will be useful for disarming drop bombs when the inner command is accessed.

src/bootstrap/src/core/build_steps/compile.rs

@@ -2080,7 +2080,8 @@ pub fn stream_cargo(
     tail_args: Vec<String>,
     cb: &mut dyn FnMut(CargoMessage<'_>),
 ) -> bool {
-    let mut cargo = cargo.into_cmd().command;
+    let mut cmd = cargo.into_cmd();
+    let cargo = cmd.as_command_mut();
     // Instruct Cargo to give us json messages on stdout, critically leaving
     // stderr as piped so we can get those pretty colors.
     let mut message_format = if builder.config.json_output {

src/bootstrap/src/core/build_steps/llvm.rs

@@ -172,7 +172,7 @@ pub(crate) fn detect_llvm_sha(config: &Config, is_git: bool) -> String {
             // the LLVM shared object file is named `LLVM-12-rust-{version}-nightly`
             config.src.join("src/version"),
         ]);
-        output(&mut rev_list.command).trim().to_owned()
+        output(rev_list.as_command_mut()).trim().to_owned()
     } else if let Some(info) = channel::read_commit_info_file(&config.src) {
         info.sha.trim().to_owned()
     } else {
@@ -254,7 +254,7 @@ pub(crate) fn is_ci_llvm_modified(config: &Config) -> bool {
         // `true` here.
         let llvm_sha = detect_llvm_sha(config, true);
         let head_sha =
-            output(&mut helpers::git(Some(&config.src)).arg("rev-parse").arg("HEAD").command);
+            output(helpers::git(Some(&config.src)).arg("rev-parse").arg("HEAD").as_command_mut());
         let head_sha = head_sha.trim();
         llvm_sha == head_sha
     }

src/bootstrap/src/core/build_steps/setup.rs

@@ -484,7 +484,7 @@ impl Step for Hook {
 fn install_git_hook_maybe(config: &Config) -> io::Result<()> {
     let git = helpers::git(Some(&config.src))
         .args(["rev-parse", "--git-common-dir"])
-        .command
+        .as_command_mut()
         .output()
         .map(|output| {
             assert!(output.status.success(), "failed to run `git`");

src/bootstrap/src/core/build_steps/test.rs

@@ -2105,7 +2105,7 @@ NOTE: if you're sure you want to do this, please open an issue as to why. In the
         cmd.arg("--nightly-branch").arg(git_config.nightly_branch);
 
         // FIXME: Move CiEnv back to bootstrap, it is only used here anyway
-        builder.ci_env.force_coloring_in_ci(&mut cmd.command);
+        builder.ci_env.force_coloring_in_ci(cmd.as_command_mut());
 
         #[cfg(feature = "build-metrics")]
         builder.metrics.begin_test_suite(

src/bootstrap/src/core/build_steps/toolstate.rs

@@ -106,7 +106,7 @@ fn check_changed_files(toolstates: &HashMap<Box<str>, ToolState>) {
         .arg("--name-status")
         .arg("HEAD")
         .arg("HEAD^")
-        .command
+        .as_command_mut()
         .output();
     let output = match output {
         Ok(o) => o,
@@ -329,7 +329,7 @@ fn checkout_toolstate_repo() {
         .arg("--depth=1")
         .arg(toolstate_repo())
         .arg(TOOLSTATE_DIR)
-        .command
+        .as_command_mut()
         .status();
     let success = match status {
         Ok(s) => s.success(),
@@ -343,8 +343,13 @@ fn checkout_toolstate_repo() {
 /// Sets up config and authentication for modifying the toolstate repo.
 fn prepare_toolstate_config(token: &str) {
     fn git_config(key: &str, value: &str) {
-        let status =
-            helpers::git(None).arg("config").arg("--global").arg(key).arg(value).command.status();
+        let status = helpers::git(None)
+            .arg("config")
+            .arg("--global")
+            .arg(key)
+            .arg(value)
+            .as_command_mut()
+            .status();
         let success = match status {
             Ok(s) => s.success(),
             Err(_) => false,
@@ -413,7 +418,7 @@ fn commit_toolstate_change(current_toolstate: &ToolstateData) {
             .arg("-a")
             .arg("-m")
             .arg(&message)
-            .command
+            .as_command_mut()
             .status());
         if !status.success() {
             success = true;
@@ -424,7 +429,7 @@ fn commit_toolstate_change(current_toolstate: &ToolstateData) {
             .arg("push")
             .arg("origin")
             .arg("master")
-            .command
+            .as_command_mut()
             .status());
         // If we successfully push, exit.
         if status.success() {
@@ -437,14 +442,14 @@ fn commit_toolstate_change(current_toolstate: &ToolstateData) {
             .arg("fetch")
             .arg("origin")
             .arg("master")
-            .command
+            .as_command_mut()
             .status());
         assert!(status.success());
         let status = t!(helpers::git(Some(Path::new(TOOLSTATE_DIR)))
             .arg("reset")
             .arg("--hard")
             .arg("origin/master")
-            .command
+            .as_command_mut()
             .status());
         assert!(status.success());
     }
@@ -460,7 +465,7 @@ fn commit_toolstate_change(current_toolstate: &ToolstateData) {
 /// `publish_toolstate.py` script if the PR passes all tests and is merged to
 /// master.
 fn publish_test_results(current_toolstate: &ToolstateData) {
-    let commit = t!(helpers::git(None).arg("rev-parse").arg("HEAD").command.output());
+    let commit = t!(helpers::git(None).arg("rev-parse").arg("HEAD").as_command_mut().output());
     let commit = t!(String::from_utf8(commit.stdout));
 
     let toolstate_serialized = t!(serde_json::to_string(&current_toolstate));

src/bootstrap/src/core/builder.rs

@@ -2105,7 +2105,7 @@ impl<'a> Builder<'a> {
         // Try to use a sysroot-relative bindir, in case it was configured absolutely.
         cargo.env("RUSTC_INSTALL_BINDIR", self.config.bindir_relative());
 
-        self.ci_env.force_coloring_in_ci(&mut cargo.command);
+        self.ci_env.force_coloring_in_ci(cargo.as_command_mut());
 
         // When we build Rust dylibs they're all intended for intermediate
         // usage, so make sure we pass the -Cprefer-dynamic flag instead of

src/bootstrap/src/core/config/config.rs

@@ -1259,7 +1259,7 @@ impl Config {
         cmd.arg("rev-parse").arg("--show-cdup");
         // Discard stderr because we expect this to fail when building from a tarball.
         let output = cmd
-            .command
+            .as_command_mut()
             .stderr(std::process::Stdio::null())
             .output()
             .ok()
@@ -2163,7 +2163,7 @@ impl Config {
 
         let mut git = helpers::git(Some(&self.src));
         git.arg("show").arg(format!("{commit}:{}", file.to_str().unwrap()));
-        output(&mut git.command)
+        output(git.as_command_mut())
     }
 
     /// Bootstrap embeds a version number into the name of shared libraries it uploads in CI.
@@ -2469,11 +2469,11 @@ impl Config {
         // Look for a version to compare to based on the current commit.
         // Only commits merged by bors will have CI artifacts.
         let merge_base = output(
-            &mut helpers::git(Some(&self.src))
+            helpers::git(Some(&self.src))
                 .arg("rev-list")
                 .arg(format!("--author={}", self.stage0_metadata.config.git_merge_commit_email))
                 .args(["-n1", "--first-parent", "HEAD"])
-                .command,
+                .as_command_mut(),
         );
         let commit = merge_base.trim_end();
         if commit.is_empty() {
@@ -2489,7 +2489,7 @@ impl Config {
             .args(["diff-index", "--quiet", commit])
             .arg("--")
             .args([self.src.join("compiler"), self.src.join("library")])
-            .command
+            .as_command_mut()
             .status())
         .success();
         if has_changes {
@@ -2563,11 +2563,11 @@ impl Config {
         // Look for a version to compare to based on the current commit.
         // Only commits merged by bors will have CI artifacts.
         let merge_base = output(
-            &mut helpers::git(Some(&self.src))
+            helpers::git(Some(&self.src))
                 .arg("rev-list")
                 .arg(format!("--author={}", self.stage0_metadata.config.git_merge_commit_email))
                 .args(["-n1", "--first-parent", "HEAD"])
-                .command,
+                .as_command_mut(),
         );
         let commit = merge_base.trim_end();
         if commit.is_empty() {
@@ -2589,7 +2589,7 @@ impl Config {
             git.arg(top_level.join(path));
         }
 
-        let has_changes = !t!(git.command.status()).success();
+        let has_changes = !t!(git.as_command_mut().status()).success();
         if has_changes {
             if if_unchanged {
                 if self.verbose > 0 {

src/bootstrap/src/core/sanity.rs

@@ -209,7 +209,7 @@ than building it.
 
     #[cfg(not(feature = "bootstrap-self-test"))]
     let stage0_supported_target_list: HashSet<String> = crate::utils::helpers::output(
-        &mut command(&build.config.initial_rustc).args(["--print", "target-list"]).command,
+        command(&build.config.initial_rustc).args(["--print", "target-list"]).as_command_mut(),
     )
     .lines()
     .map(|s| s.to_string())

src/bootstrap/src/lib.rs

@@ -493,11 +493,14 @@ impl Build {
         let submodule_git = || helpers::git(Some(&absolute_path));
 
         // Determine commit checked out in submodule.
-        let checked_out_hash = output(&mut submodule_git().args(["rev-parse", "HEAD"]).command);
+        let checked_out_hash = output(submodule_git().args(["rev-parse", "HEAD"]).as_command_mut());
         let checked_out_hash = checked_out_hash.trim_end();
         // Determine commit that the submodule *should* have.
         let recorded = output(
-            &mut helpers::git(Some(&self.src)).args(["ls-tree", "HEAD"]).arg(relative_path).command,
+            helpers::git(Some(&self.src))
+                .args(["ls-tree", "HEAD"])
+                .arg(relative_path)
+                .as_command_mut(),
         );
         let actual_hash = recorded
             .split_whitespace()
@@ -522,7 +525,7 @@ impl Build {
             let current_branch = {
                 let output = helpers::git(Some(&self.src))
                     .args(["symbolic-ref", "--short", "HEAD"])
-                    .command
+                    .as_command_mut()
                     .stderr(Stdio::inherit())
                     .output();
                 let output = t!(output);
@@ -548,7 +551,7 @@ impl Build {
             git
         };
         // NOTE: doesn't use `try_run` because this shouldn't print an error if it fails.
-        if !update(true).command.status().map_or(false, |status| status.success()) {
+        if !update(true).as_command_mut().status().map_or(false, |status| status.success()) {
             update(false).run(self);
         }
 
@@ -941,10 +944,12 @@ impl Build {
 
         self.verbose(|| println!("running: {command:?}"));
 
-        command.command.stdout(command.stdout.stdio());
-        command.command.stderr(command.stderr.stdio());
+        let stdout = command.stdout.stdio();
+        command.as_command_mut().stdout(stdout);
+        let stderr = command.stderr.stdio();
+        command.as_command_mut().stderr(stderr);
 
-        let output = command.command.output();
+        let output = command.as_command_mut().output();
 
         use std::fmt::Write;
 
@@ -1931,7 +1936,7 @@ fn envify(s: &str) -> String {
 pub fn generate_smart_stamp_hash(dir: &Path, additional_input: &str) -> String {
     let diff = helpers::git(Some(dir))
         .arg("diff")
-        .command
+        .as_command_mut()
         .output()
         .map(|o| String::from_utf8(o.stdout).unwrap_or_default())
         .unwrap_or_default();
@@ -1941,7 +1946,7 @@ pub fn generate_smart_stamp_hash(dir: &Path, additional_input: &str) -> String {
         .arg("--porcelain")
         .arg("-z")
         .arg("--untracked-files=normal")
-        .command
+        .as_command_mut()
         .output()
         .map(|o| String::from_utf8(o.stdout).unwrap_or_default())
         .unwrap_or_default();

src/bootstrap/src/utils/channel.rs

@@ -45,7 +45,7 @@ impl GitInfo {
         }
 
         // Make sure git commands work
-        match helpers::git(Some(dir)).arg("rev-parse").command.output() {
+        match helpers::git(Some(dir)).arg("rev-parse").as_command_mut().output() {
             Ok(ref out) if out.status.success() => {}
             _ => return GitInfo::Absent,
         }
@@ -63,11 +63,12 @@ impl GitInfo {
                 .arg("-1")
                 .arg("--date=short")
                 .arg("--pretty=format:%cd")
-                .command,
+                .as_command_mut(),
         );
-        let ver_hash = output(&mut helpers::git(Some(dir)).arg("rev-parse").arg("HEAD").command);
+        let ver_hash =
+            output(helpers::git(Some(dir)).arg("rev-parse").arg("HEAD").as_command_mut());
         let short_ver_hash = output(
-            &mut helpers::git(Some(dir)).arg("rev-parse").arg("--short=9").arg("HEAD").command,
+            helpers::git(Some(dir)).arg("rev-parse").arg("--short=9").arg("HEAD").as_command_mut(),
         );
         GitInfo::Present(Some(Info {
             commit_date: ver_date.trim().to_string(),

src/bootstrap/src/utils/exec.rs

@@ -55,7 +55,7 @@ impl OutputMode {
 /// [delay_failure]: BootstrapCommand::delay_failure
 #[derive(Debug)]
 pub struct BootstrapCommand {
-    pub command: Command,
+    command: Command,
     pub failure_behavior: BehaviorOnFailure,
     pub stdout: OutputMode,
     pub stderr: OutputMode,
@@ -145,6 +145,12 @@ impl BootstrapCommand {
     pub fn run(&mut self, builder: &Build) -> CommandOutput {
         builder.run(self)
     }
+
+    /// Provides access to the stdlib Command inside.
+    /// All usages of this function should be eventually removed from bootstrap.
+    pub fn as_command_mut(&mut self) -> &mut Command {
+        &mut self.command
+    }
 }
 
 impl From<Command> for BootstrapCommand {

src/bootstrap/src/utils/helpers.rs

@@ -244,7 +244,7 @@ pub fn is_valid_test_suite_arg<'a, P: AsRef<Path>>(
 
 // FIXME: get rid of this function
 pub fn check_run(cmd: &mut BootstrapCommand, print_cmd_on_fail: bool) -> bool {
-    let status = match cmd.command.status() {
+    let status = match cmd.as_command_mut().status() {
         Ok(status) => status,
         Err(e) => {
             println!("failed to execute command: {cmd:?}\nERROR: {e}");

src/bootstrap/src/utils/render_tests.rs

@@ -50,7 +50,7 @@ pub(crate) fn try_run_tests(
 }
 
 fn run_tests(builder: &Builder<'_>, cmd: &mut BootstrapCommand, stream: bool) -> bool {
-    let cmd = &mut cmd.command;
+    let cmd = cmd.as_command_mut();
     cmd.stdout(Stdio::piped());
 
     builder.verbose(|| println!("running: {cmd:?}"));

src/bootstrap/src/utils/tarball.rs

@@ -370,11 +370,11 @@ impl<'a> Tarball<'a> {
         if self.builder.rust_info().is_managed_git_subrepository() {
             // %ct means committer date
             let timestamp = helpers::output(
-                &mut helpers::git(Some(&self.builder.src))
+                helpers::git(Some(&self.builder.src))
                     .arg("log")
                     .arg("-1")
                     .arg("--format=%ct")
-                    .command,
+                    .as_command_mut(),
             );
             cmd.args(["--override-file-mtime", timestamp.trim()]);
         }