migrate Builder::clear_if_dirty

Signed-off-by: onur-ozkan <work@onurozkan.dev>

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

@@ -21,7 +21,7 @@
 };
 use crate::core::config::TargetSelection;
 use crate::core::config::flags::{Subcommand, get_completion};
-use crate::utils::build_stamp::BuildStamp;
+use crate::utils::build_stamp::{self, BuildStamp};
 use crate::utils::exec::{BootstrapCommand, command};
 use crate::utils::helpers::{
     self, LldThreads, add_link_lib_path, add_rustdoc_cargo_linker_args, dylib_path, dylib_path_var,
@@ -545,7 +545,7 @@ fn run(self, builder: &Builder<'_>) {
             // The mtime of `miri_sysroot` changes when the sysroot gets rebuilt (also see
             // <https://github.com/RalfJung/rustc-build-sysroot/commit/10ebcf60b80fe2c3dc765af0ff19fdc0da4b7466>).
             // We can hence use that directly as a signal to clear the ui test dir.
-            builder.clear_if_dirty(&ui_test_dep_dir, &miri_sysroot);
+            build_stamp::clear_if_dirty(builder, &ui_test_dep_dir, &miri_sysroot);
         }
 
         // Run `cargo test`.
@@ -982,7 +982,7 @@ fn run(self, builder: &Builder<'_>) {
         let mut cmd = builder.tool_cmd(Tool::RustdocGUITest);
 
         let out_dir = builder.test_out(self.target).join("rustdoc-gui");
-        builder.clear_if_dirty(&out_dir, &builder.rustdoc(self.compiler));
+        build_stamp::clear_if_dirty(builder, &out_dir, &builder.rustdoc(self.compiler));
 
         if let Some(src) = builder.config.src.to_str() {
             cmd.arg("--rust-src").arg(src);

src/bootstrap/src/core/builder/cargo.rs

@@ -7,6 +7,7 @@
 use crate::core::build_steps::{compile, test};
 use crate::core::config::SplitDebuginfo;
 use crate::core::config::flags::Color;
+use crate::utils::build_stamp;
 use crate::utils::helpers::{
     self, LldThreads, add_link_lib_path, check_cfg_arg, linker_args, linker_flags,
 };
@@ -454,7 +455,7 @@ fn cargo(
         // Codegen backends are not yet tracked by -Zbinary-dep-depinfo,
         // so we need to explicitly clear out if they've been updated.
         for backend in self.codegen_backends(compiler) {
-            self.clear_if_dirty(&out_dir, &backend);
+            build_stamp::clear_if_dirty(self, &out_dir, &backend);
         }
 
         if cmd_kind == Kind::Doc {
@@ -471,7 +472,7 @@ fn cargo(
                 _ => panic!("doc mode {mode:?} not expected"),
             };
             let rustdoc = self.rustdoc(compiler);
-            self.clear_if_dirty(&my_out, &rustdoc);
+            build_stamp::clear_if_dirty(self, &my_out, &rustdoc);
         }
 
         let profile_var = |name: &str| {
@@ -763,7 +764,7 @@ fn cargo(
         // Only clear out the directory if we're compiling std; otherwise, we
         // should let Cargo take care of things for us (via depdep info)
         if !self.config.dry_run() && mode == Mode::Std && cmd_kind == Kind::Build {
-            self.clear_if_dirty(&out_dir, &self.rustc(compiler));
+            build_stamp::clear_if_dirty(self, &out_dir, &self.rustc(compiler));
         }
 
         let rustdoc_path = match cmd_kind {

src/bootstrap/src/lib.rs

@@ -19,12 +19,11 @@
 use std::cell::{Cell, RefCell};
 use std::collections::{BTreeSet, HashMap, HashSet};
 use std::fmt::Display;
-use std::fs::{self, File};
 use std::path::{Path, PathBuf};
 use std::process::Command;
 use std::sync::OnceLock;
 use std::time::SystemTime;
-use std::{env, io, str};
+use std::{env, fs, io, str};
 
 use build_helper::ci::gha;
 use build_helper::exit;
@@ -38,9 +37,7 @@
 use crate::core::builder::{Builder, Kind};
 use crate::core::config::{DryRun, LldMode, LlvmLibunwind, Target, TargetSelection, flags};
 use crate::utils::exec::{BehaviorOnFailure, BootstrapCommand, CommandOutput, OutputMode, command};
-use crate::utils::helpers::{
-    self, dir_is_empty, exe, libdir, mtime, output, set_file_times, symlink_dir,
-};
+use crate::utils::helpers::{self, dir_is_empty, exe, libdir, output, set_file_times, symlink_dir};
 
 mod core;
 mod utils;
@@ -599,24 +596,6 @@ pub fn build(&mut self) {
         self.metrics.persist(self);
     }
 
-    /// Clear out `dir` if `input` is newer.
-    ///
-    /// After this executes, it will also ensure that `dir` exists.
-    fn clear_if_dirty(&self, dir: &Path, input: &Path) -> bool {
-        let stamp = BuildStamp::new(dir);
-        let mut cleared = false;
-        if mtime(stamp.as_ref()) < mtime(input) {
-            self.verbose(|| println!("Dirty - {}", dir.display()));
-            let _ = fs::remove_dir_all(dir);
-            cleared = true;
-        } else if stamp.as_ref().exists() {
-            return cleared;
-        }
-        t!(fs::create_dir_all(dir));
-        t!(File::create(stamp));
-        cleared
-    }
-
     fn rust_info(&self) -> &GitInfo {
         &self.config.rust_info
     }

src/bootstrap/src/utils/build_stamp.rs

@@ -3,7 +3,8 @@
 
 use crate::core::builder::Builder;
 use crate::core::config::TargetSelection;
-use crate::{Compiler, Mode};
+use crate::utils::helpers::mtime;
+use crate::{Compiler, Mode, t};
 
 #[derive(Clone)]
 pub struct BuildStamp {
@@ -74,6 +75,24 @@ pub fn is_up_to_date(&self) -> bool {
     }
 }
 
+/// Clear out `dir` if `input` is newer.
+///
+/// After this executes, it will also ensure that `dir` exists.
+pub fn clear_if_dirty(builder: &Builder<'_>, dir: &Path, input: &Path) -> bool {
+    let stamp = BuildStamp::new(dir);
+    let mut cleared = false;
+    if mtime(stamp.as_ref()) < mtime(input) {
+        builder.verbose(|| println!("Dirty - {}", dir.display()));
+        let _ = fs::remove_dir_all(dir);
+        cleared = true;
+    } else if stamp.as_ref().exists() {
+        return cleared;
+    }
+    t!(fs::create_dir_all(dir));
+    t!(fs::File::create(stamp));
+    cleared
+}
+
 /// Cargo's output path for librustc_codegen_llvm in a given stage, compiled by a particular
 /// compiler for the specified target and backend.
 pub fn codegen_backend_stamp(