Merge pull request rust-lang#1279 from bjorn3/build_system_rework

Some refactorings for the build system

build_system/abi_checker.rs

@@ -1,16 +1,16 @@
-use super::build_sysroot;
-use super::config;
-use super::utils::spawn_and_wait;
-use build_system::SysrootKind;
 use std::env;
 use std::path::Path;
-use std::process::Command;
+
+use super::build_sysroot;
+use super::config;
+use super::utils::{cargo_command, spawn_and_wait};
+use super::SysrootKind;
 
 pub(crate) fn run(
     channel: &str,
     sysroot_kind: SysrootKind,
     target_dir: &Path,
-    cg_clif_build_dir: &Path,
+    cg_clif_dylib: &Path,
     host_triple: &str,
     target_triple: &str,
 ) {
@@ -29,32 +29,24 @@ pub(crate) fn run(
         channel,
         sysroot_kind,
         target_dir,
-        cg_clif_build_dir,
+        cg_clif_dylib,
         host_triple,
         target_triple,
     );
 
     eprintln!("Running abi-checker");
     let mut abi_checker_path = env::current_dir().unwrap();
     abi_checker_path.push("abi-checker");
-    env::set_current_dir(abi_checker_path.clone()).unwrap();
-
-    let build_dir = abi_checker_path.parent().unwrap().join("build");
-    let cg_clif_dylib_path = build_dir.join(if cfg!(windows) { "bin" } else { "lib" }).join(
-        env::consts::DLL_PREFIX.to_string() + "rustc_codegen_cranelift" + env::consts::DLL_SUFFIX,
-    );
+    env::set_current_dir(&abi_checker_path.clone()).unwrap();
 
     let pairs = ["rustc_calls_cgclif", "cgclif_calls_rustc", "cgclif_calls_cc", "cc_calls_cgclif"];
 
-    let mut cmd = Command::new("cargo");
-    cmd.arg("run");
-    cmd.arg("--target");
-    cmd.arg(target_triple);
+    let mut cmd = cargo_command("cargo", "run", Some(target_triple), &abi_checker_path);
     cmd.arg("--");
     cmd.arg("--pairs");
     cmd.args(pairs);
     cmd.arg("--add-rustc-codegen-backend");
-    cmd.arg(format!("cgclif:{}", cg_clif_dylib_path.display()));
+    cmd.arg(format!("cgclif:{}", cg_clif_dylib.display()));
 
     spawn_and_wait(cmd);
 }

build_system/build_backend.rs

@@ -1,16 +1,16 @@
 use std::env;
-use std::path::{Path, PathBuf};
-use std::process::Command;
+use std::path::PathBuf;
 
-use super::utils::is_ci;
+use super::rustc_info::get_file_name;
+use super::utils::{cargo_command, is_ci};
 
 pub(crate) fn build_backend(
     channel: &str,
     host_triple: &str,
     use_unstable_features: bool,
 ) -> PathBuf {
-    let mut cmd = Command::new("cargo");
-    cmd.arg("build").arg("--target").arg(host_triple);
+    let source_dir = std::env::current_dir().unwrap();
+    let mut cmd = cargo_command("cargo", "build", Some(host_triple), &source_dir);
 
     cmd.env("CARGO_BUILD_INCREMENTAL", "true"); // Force incr comp even in release mode
 
@@ -41,5 +41,9 @@ pub(crate) fn build_backend(
     eprintln!("[BUILD] rustc_codegen_cranelift");
     super::utils::spawn_and_wait(cmd);
 
-    Path::new("target").join(host_triple).join(channel)
+    source_dir
+        .join("target")
+        .join(host_triple)
+        .join(channel)
+        .join(get_file_name("rustc_codegen_cranelift", "dylib"))
 }

build_system/build_sysroot.rs

@@ -3,14 +3,14 @@ use std::path::{Path, PathBuf};
 use std::process::{self, Command};
 
 use super::rustc_info::{get_file_name, get_rustc_version, get_wrapper_file_name};
-use super::utils::{spawn_and_wait, try_hard_link};
+use super::utils::{cargo_command, spawn_and_wait, try_hard_link};
 use super::SysrootKind;
 
 pub(crate) fn build_sysroot(
     channel: &str,
     sysroot_kind: SysrootKind,
     target_dir: &Path,
-    cg_clif_build_dir: &Path,
+    cg_clif_dylib_src: &Path,
     host_triple: &str,
     target_triple: &str,
 ) {
@@ -23,7 +23,6 @@ pub(crate) fn build_sysroot(
     fs::create_dir_all(target_dir.join("lib")).unwrap();
 
     // Copy the backend
-    let cg_clif_dylib = get_file_name("rustc_codegen_cranelift", "dylib");
     let cg_clif_dylib_path = target_dir
         .join(if cfg!(windows) {
             // Windows doesn't have rpath support, so the cg_clif dylib needs to be next to the
@@ -32,8 +31,8 @@ pub(crate) fn build_sysroot(
         } else {
             "lib"
         })
-        .join(&cg_clif_dylib);
-    try_hard_link(cg_clif_build_dir.join(cg_clif_dylib), &cg_clif_dylib_path);
+        .join(get_file_name("rustc_codegen_cranelift", "dylib"));
+    try_hard_link(cg_clif_dylib_src, &cg_clif_dylib_path);
 
     // Build and copy rustc and cargo wrappers
     for wrapper in ["rustc-clif", "cargo-clif"] {
@@ -186,8 +185,7 @@ fn build_clif_sysroot_for_triple(
     }
 
     // Build sysroot
-    let mut build_cmd = Command::new("cargo");
-    build_cmd.arg("build").arg("--target").arg(triple).current_dir("build_sysroot");
+    let mut build_cmd = cargo_command("cargo", "build", Some(triple), Path::new("build_sysroot"));
     let mut rustflags = "-Zforce-unstable-if-unmarked -Cpanic=abort".to_string();
     rustflags.push_str(&format!(" -Zcodegen-backend={}", cg_clif_dylib_path.to_str().unwrap()));
     if channel == "release" {

build_system/config.rs

@@ -1,4 +1,5 @@
-use std::{fs, process};
+use std::fs;
+use std::process;
 
 fn load_config_file() -> Vec<(String, Option<String>)> {
     fs::read_to_string("config.txt")

build_system/mod.rs

@@ -130,15 +130,15 @@ pub fn main() {
         process::exit(1);
     }
 
-    let cg_clif_build_dir =
+    let cg_clif_dylib =
         build_backend::build_backend(channel, &host_triple, use_unstable_features);
     match command {
         Command::Test => {
             tests::run_tests(
                 channel,
                 sysroot_kind,
                 &target_dir,
-                &cg_clif_build_dir,
+                &cg_clif_dylib,
                 &host_triple,
                 &target_triple,
             );
@@ -147,7 +147,7 @@ pub fn main() {
                 channel,
                 sysroot_kind,
                 &target_dir,
-                &cg_clif_build_dir,
+                &cg_clif_dylib,
                 &host_triple,
                 &target_triple,
             );
@@ -157,7 +157,7 @@ pub fn main() {
                 channel,
                 sysroot_kind,
                 &target_dir,
-                &cg_clif_build_dir,
+                &cg_clif_dylib,
                 &host_triple,
                 &target_triple,
             );

build_system/prepare.rs

@@ -1,12 +1,11 @@
 use std::env;
 use std::ffi::OsStr;
-use std::ffi::OsString;
 use std::fs;
-use std::path::Path;
+use std::path::{Path, PathBuf};
 use std::process::Command;
 
 use super::rustc_info::{get_file_name, get_rustc_path, get_rustc_version};
-use super::utils::{copy_dir_recursively, spawn_and_wait};
+use super::utils::{cargo_command, copy_dir_recursively, spawn_and_wait};
 
 pub(crate) fn prepare() {
     prepare_sysroot();
@@ -53,8 +52,7 @@ pub(crate) fn prepare() {
     );
 
     eprintln!("[LLVM BUILD] simple-raytracer");
-    let mut build_cmd = Command::new("cargo");
-    build_cmd.arg("build").env_remove("CARGO_TARGET_DIR").current_dir("simple-raytracer");
+    let build_cmd = cargo_command("cargo", "build", None, Path::new("simple-raytracer"));
     spawn_and_wait(build_cmd);
     fs::copy(
         Path::new("simple-raytracer/target/debug").join(get_file_name("main", "bin")),
@@ -156,26 +154,35 @@ fn init_git_repo(repo_dir: &Path) {
     spawn_and_wait(git_commit_cmd);
 }
 
-fn get_patches(crate_name: &str) -> Vec<OsString> {
-    let mut patches: Vec<_> = fs::read_dir("patches")
+fn get_patches(source_dir: &Path, crate_name: &str) -> Vec<PathBuf> {
+    let mut patches: Vec<_> = fs::read_dir(source_dir.join("patches"))
         .unwrap()
         .map(|entry| entry.unwrap().path())
         .filter(|path| path.extension() == Some(OsStr::new("patch")))
-        .map(|path| path.file_name().unwrap().to_owned())
-        .filter(|file_name| {
-            file_name.to_str().unwrap().split_once("-").unwrap().1.starts_with(crate_name)
+        .filter(|path| {
+            path.file_name()
+                .unwrap()
+                .to_str()
+                .unwrap()
+                .split_once("-")
+                .unwrap()
+                .1
+                .starts_with(crate_name)
         })
         .collect();
     patches.sort();
     patches
 }
 
 fn apply_patches(crate_name: &str, target_dir: &Path) {
-    for patch in get_patches(crate_name) {
-        eprintln!("[PATCH] {:?} <- {:?}", target_dir.file_name().unwrap(), patch);
-        let patch_arg = env::current_dir().unwrap().join("patches").join(patch);
+    for patch in get_patches(&std::env::current_dir().unwrap(), crate_name) {
+        eprintln!(
+            "[PATCH] {:?} <- {:?}",
+            target_dir.file_name().unwrap(),
+            patch.file_name().unwrap()
+        );
         let mut apply_patch_cmd = Command::new("git");
-        apply_patch_cmd.arg("am").arg(patch_arg).arg("-q").current_dir(target_dir);
+        apply_patch_cmd.arg("am").arg(patch).arg("-q").current_dir(target_dir);
         spawn_and_wait(apply_patch_cmd);
     }
 }