Revert "Auto merge of #105058 - Nilstrieb:no-merge-commits-for-you-on…

…ly-bors-is-allowed-to-do-that, r=jyn514"

This reverts commit 4839886, reversing
changes made to ce85c98.

.github/workflows/ci.yml

@@ -71,11 +71,6 @@ jobs:
         uses: actions/checkout@v3
         with:
           fetch-depth: 2
-      - name: "checkout the `master` branch for tidy"
-        uses: actions/checkout@v3
-        with:
-          ref: master
-          fetch-depth: 1
       - name: configure the PR in which the error message will be posted
         run: "echo \"[CI_PR_NUMBER=$num]\""
         env:
@@ -490,11 +485,6 @@ jobs:
         uses: actions/checkout@v3
         with:
           fetch-depth: 2
-      - name: "checkout the `master` branch for tidy"
-        uses: actions/checkout@v3
-        with:
-          ref: master
-          fetch-depth: 1
       - name: configure the PR in which the error message will be posted
         run: "echo \"[CI_PR_NUMBER=$num]\""
         env:
@@ -610,11 +600,6 @@ jobs:
         uses: actions/checkout@v3
         with:
           fetch-depth: 2
-      - name: "checkout the `master` branch for tidy"
-        uses: actions/checkout@v3
-        with:
-          ref: master
-          fetch-depth: 1
       - name: configure the PR in which the error message will be posted
         run: "echo \"[CI_PR_NUMBER=$num]\""
         env:

Cargo.lock

@@ -259,10 +259,6 @@ dependencies = [
  "toml",
 ]
 
-[[package]]
-name = "build_helper"
-version = "0.1.0"
-
 [[package]]
 name = "bump-stage0"
 version = "0.1.0"
@@ -5308,7 +5304,6 @@ dependencies = [
 name = "tidy"
 version = "0.1.0"
 dependencies = [
- "build_helper",
  "cargo_metadata 0.14.0",
  "ignore",
  "lazy_static",

Cargo.toml

@@ -4,7 +4,6 @@ members = [
   "library/std",
   "library/test",
   "src/rustdoc-json-types",
-  "src/tools/build_helper",
   "src/tools/cargotest",
   "src/tools/clippy",
   "src/tools/clippy/clippy_dev",

src/bootstrap/Cargo.lock

@@ -36,7 +36,6 @@ dependencies = [
 name = "bootstrap"
 version = "0.0.0"
 dependencies = [
- "build_helper",
  "cc",
  "cmake",
  "fd-lock",
@@ -71,10 +70,6 @@ dependencies = [
  "regex-automata",
 ]
 
-[[package]]
-name = "build_helper"
-version = "0.1.0"
-
 [[package]]
 name = "cc"
 version = "1.0.73"

src/bootstrap/Cargo.toml

@@ -30,7 +30,6 @@ 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"

src/bootstrap/format.rs

@@ -2,7 +2,6 @@
 
 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};
@@ -101,6 +100,35 @@ 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>,

src/bootstrap/lib.rs

@@ -113,7 +113,6 @@ 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;
@@ -122,7 +121,7 @@ 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,
+    exe, libdir, mtime, output, run, run_suppressed, symlink_dir, try_run_suppressed, CiEnv,
 };
 
 mod bolt;

src/bootstrap/native.rs

@@ -24,8 +24,6 @@ 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.
@@ -219,7 +217,7 @@ pub(crate) fn is_ci_llvm_available(config: &Config, asserts: bool) -> bool {
         return false;
     }
 
-    if CiEnv::is_ci() {
+    if crate::util::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);

src/bootstrap/util.rs

@@ -255,6 +255,35 @@ 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()[..] {

src/ci/github-actions/ci.yml

@@ -103,12 +103,6 @@ x--expand-yaml-anchors--remove:
         with:
           fetch-depth: 2
 
-      - name: checkout the `master` branch for tidy
-        uses: actions/checkout@v3
-        with:
-          ref: master
-          fetch-depth: 1
-
       # Rust Log Analyzer can't currently detect the PR number of a GitHub
       # Actions build on its own, so a hint in the log message is needed to
       # point it in the right direction.

src/tools/tidy/Cargo.toml

@@ -5,7 +5,6 @@ edition = "2021"
 autobins = false
 
 [dependencies]
-build_helper = { path = "../build_helper" }
 cargo_metadata = "0.14"
 regex = "1"
 miropt-test-tools = { path = "../miropt-test-tools" }

src/tools/tidy/src/lib.rs

@@ -48,7 +48,6 @@ pub mod errors;
 pub mod extdeps;
 pub mod features;
 pub mod mir_opt_tests;
-pub mod no_merge;
 pub mod pal;
 pub mod primitive_docs;
 pub mod style;

src/tools/tidy/src/main.rs

@@ -107,8 +107,6 @@ fn main() {
         check!(alphabetical, &compiler_path);
         check!(alphabetical, &library_path);
 
-        check!(no_merge, ());
-
         let collected = {
             drain_handles(&mut handles);