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-rw-r--r--Cargo.lock5
-rw-r--r--Cargo.toml1
-rw-r--r--src/bootstrap/Cargo.lock5
-rw-r--r--src/bootstrap/Cargo.toml1
-rw-r--r--src/bootstrap/format.rs30
-rw-r--r--src/bootstrap/lib.rs3
-rw-r--r--src/bootstrap/native.rs4
-rw-r--r--src/bootstrap/util.rs29
-rw-r--r--src/tools/build_helper/Cargo.toml8
-rw-r--r--src/tools/build_helper/src/ci.rs40
-rw-r--r--src/tools/build_helper/src/git.rs30
-rw-r--r--src/tools/build_helper/src/lib.rs2
12 files changed, 98 insertions, 60 deletions
diff --git a/Cargo.lock b/Cargo.lock
index f99e58e59b8..7a86a1012a7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -260,6 +260,10 @@ dependencies = [
 ]
 
 [[package]]
+name = "build_helper"
+version = "0.1.0"
+
+[[package]]
 name = "bump-stage0"
 version = "0.1.0"
 dependencies = [
@@ -5304,6 +5308,7 @@ dependencies = [
 name = "tidy"
 version = "0.1.0"
 dependencies = [
+ "build_helper",
  "cargo_metadata 0.14.0",
  "ignore",
  "lazy_static",
diff --git a/Cargo.toml b/Cargo.toml
index 1cec4a84480..ce08d4edb56 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,6 +4,7 @@ members = [
   "library/std",
   "library/test",
   "src/rustdoc-json-types",
+  "src/tools/build_helper",
   "src/tools/cargotest",
   "src/tools/clippy",
   "src/tools/clippy/clippy_dev",
diff --git a/src/bootstrap/Cargo.lock b/src/bootstrap/Cargo.lock
index efe8ae3169f..4a0ba592577 100644
--- a/src/bootstrap/Cargo.lock
+++ b/src/bootstrap/Cargo.lock
@@ -36,6 +36,7 @@ dependencies = [
 name = "bootstrap"
 version = "0.0.0"
 dependencies = [
+ "build_helper",
  "cc",
  "cmake",
  "fd-lock",
@@ -71,6 +72,10 @@ dependencies = [
 ]
 
 [[package]]
+name = "build_helper"
+version = "0.1.0"
+
+[[package]]
 name = "cc"
 version = "1.0.73"
 source = "registry+https://github.com/rust-lang/crates.io-index"
diff --git a/src/bootstrap/Cargo.toml b/src/bootstrap/Cargo.toml
index fafe82a9c12..22ceeca941e 100644
--- a/src/bootstrap/Cargo.toml
+++ b/src/bootstrap/Cargo.toml
@@ -30,6 +30,7 @@ path = "bin/sccache-plus-cl.rs"
 test = false
 
 [dependencies]
+build_helper = { path = "../tools/build_helper" }
 cmake = "0.1.38"
 fd-lock = "3.0.8"
 filetime = "0.2"
diff --git a/src/bootstrap/format.rs b/src/bootstrap/format.rs
index 84e46118959..cca45f4a634 100644
--- a/src/bootstrap/format.rs
+++ b/src/bootstrap/format.rs
@@ -2,6 +2,7 @@
 
 use crate::builder::Builder;
 use crate::util::{output, program_out_of_date, t};
+use build_helper::git::get_rust_lang_rust_remote;
 use ignore::WalkBuilder;
 use std::collections::VecDeque;
 use std::path::{Path, PathBuf};
@@ -95,35 +96,6 @@ fn get_modified_rs_files(build: &Builder<'_>) -> Option<Vec<String>> {
     )
 }
 
-/// Finds the remote for rust-lang/rust.
-/// For example for these remotes it will return `upstream`.
-/// ```text
-/// origin  https://github.com/Nilstrieb/rust.git (fetch)
-/// origin  https://github.com/Nilstrieb/rust.git (push)
-/// upstream        https://github.com/rust-lang/rust (fetch)
-/// upstream        https://github.com/rust-lang/rust (push)
-/// ```
-fn get_rust_lang_rust_remote() -> Result<String, String> {
-    let mut git = Command::new("git");
-    git.args(["config", "--local", "--get-regex", "remote\\..*\\.url"]);
-
-    let output = git.output().map_err(|err| format!("{err:?}"))?;
-    if !output.status.success() {
-        return Err("failed to execute git config command".to_owned());
-    }
-
-    let stdout = String::from_utf8(output.stdout).map_err(|err| format!("{err:?}"))?;
-
-    let rust_lang_remote = stdout
-        .lines()
-        .find(|remote| remote.contains("rust-lang"))
-        .ok_or_else(|| "rust-lang/rust remote not found".to_owned())?;
-
-    let remote_name =
-        rust_lang_remote.split('.').nth(1).ok_or_else(|| "remote name not found".to_owned())?;
-    Ok(remote_name.into())
-}
-
 #[derive(serde::Deserialize)]
 struct RustfmtConfig {
     ignore: Vec<String>,
diff --git a/src/bootstrap/lib.rs b/src/bootstrap/lib.rs
index 5ea41d10bc8..d44b96cfb99 100644
--- a/src/bootstrap/lib.rs
+++ b/src/bootstrap/lib.rs
@@ -113,6 +113,7 @@ use std::path::{Path, PathBuf};
 use std::process::Command;
 use std::str;
 
+use build_helper::ci::CiEnv;
 use channel::GitInfo;
 use config::{DryRun, Target};
 use filetime::FileTime;
@@ -121,7 +122,7 @@ use once_cell::sync::OnceCell;
 use crate::builder::Kind;
 use crate::config::{LlvmLibunwind, TargetSelection};
 use crate::util::{
-    exe, libdir, mtime, output, run, run_suppressed, symlink_dir, try_run_suppressed, CiEnv,
+    exe, libdir, mtime, output, run, run_suppressed, symlink_dir, try_run_suppressed,
 };
 
 mod bolt;
diff --git a/src/bootstrap/native.rs b/src/bootstrap/native.rs
index 4e503dfe864..bdc81b07b8d 100644
--- a/src/bootstrap/native.rs
+++ b/src/bootstrap/native.rs
@@ -24,6 +24,8 @@ use crate::util::get_clang_cl_resource_dir;
 use crate::util::{self, exe, output, t, up_to_date};
 use crate::{CLang, GitRepo};
 
+use build_helper::ci::CiEnv;
+
 #[derive(Clone)]
 pub struct LlvmResult {
     /// Path to llvm-config binary.
@@ -217,7 +219,7 @@ pub(crate) fn is_ci_llvm_available(config: &Config, asserts: bool) -> bool {
         return false;
     }
 
-    if crate::util::CiEnv::is_ci() {
+    if CiEnv::is_ci() {
         // We assume we have access to git, so it's okay to unconditionally pass
         // `true` here.
         let llvm_sha = detect_llvm_sha(config, true);
diff --git a/src/bootstrap/util.rs b/src/bootstrap/util.rs
index 58220783228..8ce9a9ce38c 100644
--- a/src/bootstrap/util.rs
+++ b/src/bootstrap/util.rs
@@ -255,35 +255,6 @@ pub enum CiEnv {
     GitHubActions,
 }
 
-impl CiEnv {
-    /// Obtains the current CI environment.
-    pub fn current() -> CiEnv {
-        if env::var("TF_BUILD").map_or(false, |e| e == "True") {
-            CiEnv::AzurePipelines
-        } else if env::var("GITHUB_ACTIONS").map_or(false, |e| e == "true") {
-            CiEnv::GitHubActions
-        } else {
-            CiEnv::None
-        }
-    }
-
-    pub fn is_ci() -> bool {
-        Self::current() != CiEnv::None
-    }
-
-    /// If in a CI environment, forces the command to run with colors.
-    pub fn force_coloring_in_ci(self, cmd: &mut Command) {
-        if self != CiEnv::None {
-            // Due to use of stamp/docker, the output stream of rustbuild is not
-            // a TTY in CI, so coloring is by-default turned off.
-            // The explicit `TERM=xterm` environment is needed for
-            // `--color always` to actually work. This env var was lost when
-            // compiling through the Makefile. Very strange.
-            cmd.env("TERM", "xterm").args(&["--color", "always"]);
-        }
-    }
-}
-
 pub fn forcing_clang_based_tests() -> bool {
     if let Some(var) = env::var_os("RUSTBUILD_FORCE_CLANG_BASED_TESTS") {
         match &var.to_string_lossy().to_lowercase()[..] {
diff --git a/src/tools/build_helper/Cargo.toml b/src/tools/build_helper/Cargo.toml
new file mode 100644
index 00000000000..99f6fea2ecf
--- /dev/null
+++ b/src/tools/build_helper/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "build_helper"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/src/tools/build_helper/src/ci.rs b/src/tools/build_helper/src/ci.rs
new file mode 100644
index 00000000000..9f113c72b93
--- /dev/null
+++ b/src/tools/build_helper/src/ci.rs
@@ -0,0 +1,40 @@
+use std::process::Command;
+
+#[derive(Copy, Clone, PartialEq, Eq, Debug)]
+pub enum CiEnv {
+    /// Not a CI environment.
+    None,
+    /// The Azure Pipelines environment, for Linux (including Docker), Windows, and macOS builds.
+    AzurePipelines,
+    /// The GitHub Actions environment, for Linux (including Docker), Windows and macOS builds.
+    GitHubActions,
+}
+
+impl CiEnv {
+    /// Obtains the current CI environment.
+    pub fn current() -> CiEnv {
+        if std::env::var("TF_BUILD").map_or(false, |e| e == "True") {
+            CiEnv::AzurePipelines
+        } else if std::env::var("GITHUB_ACTIONS").map_or(false, |e| e == "true") {
+            CiEnv::GitHubActions
+        } else {
+            CiEnv::None
+        }
+    }
+
+    pub fn is_ci() -> bool {
+        Self::current() != CiEnv::None
+    }
+
+    /// If in a CI environment, forces the command to run with colors.
+    pub fn force_coloring_in_ci(self, cmd: &mut Command) {
+        if self != CiEnv::None {
+            // Due to use of stamp/docker, the output stream of rustbuild is not
+            // a TTY in CI, so coloring is by-default turned off.
+            // The explicit `TERM=xterm` environment is needed for
+            // `--color always` to actually work. This env var was lost when
+            // compiling through the Makefile. Very strange.
+            cmd.env("TERM", "xterm").args(&["--color", "always"]);
+        }
+    }
+}
diff --git a/src/tools/build_helper/src/git.rs b/src/tools/build_helper/src/git.rs
new file mode 100644
index 00000000000..e9638206e67
--- /dev/null
+++ b/src/tools/build_helper/src/git.rs
@@ -0,0 +1,30 @@
+use std::process::Command;
+
+/// Finds the remote for rust-lang/rust.
+/// For example for these remotes it will return `upstream`.
+/// ```text
+/// origin  https://github.com/Nilstrieb/rust.git (fetch)
+/// origin  https://github.com/Nilstrieb/rust.git (push)
+/// upstream        https://github.com/rust-lang/rust (fetch)
+/// upstream        https://github.com/rust-lang/rust (push)
+/// ```
+pub fn get_rust_lang_rust_remote() -> Result<String, String> {
+    let mut git = Command::new("git");
+    git.args(["config", "--local", "--get-regex", "remote\\..*\\.url"]);
+
+    let output = git.output().map_err(|err| format!("{err:?}"))?;
+    if !output.status.success() {
+        return Err("failed to execute git config command".to_owned());
+    }
+
+    let stdout = String::from_utf8(output.stdout).map_err(|err| format!("{err:?}"))?;
+
+    let rust_lang_remote = stdout
+        .lines()
+        .find(|remote| remote.contains("rust-lang"))
+        .ok_or_else(|| "rust-lang/rust remote not found".to_owned())?;
+
+    let remote_name =
+        rust_lang_remote.split('.').nth(1).ok_or_else(|| "remote name not found".to_owned())?;
+    Ok(remote_name.into())
+}
diff --git a/src/tools/build_helper/src/lib.rs b/src/tools/build_helper/src/lib.rs
new file mode 100644
index 00000000000..d3d2323db85
--- /dev/null
+++ b/src/tools/build_helper/src/lib.rs
@@ -0,0 +1,2 @@
+pub mod ci;
+pub mod git;
generated by cgit-pink 1.4.1-3-g733a5 (git 2.37.1) at 2026-01-09 16:40:15 +0000