Don't hard-code rustc path in get_rustc_version and get_default_sysroot

Author: bjorn3

build_system/build_sysroot.rs

@@ -53,7 +53,7 @@ pub(crate) fn build_sysroot(
         spawn_and_wait(build_cargo_wrapper_cmd);
     }
 
-    let default_sysroot = super::rustc_info::get_default_sysroot();
+    let default_sysroot = super::rustc_info::get_default_sysroot(&bootstrap_host_compiler.rustc);
 
     let host_rustlib_lib =
         RUSTLIB_DIR.to_path(dirs).join(&bootstrap_host_compiler.triple).join("lib");
@@ -182,7 +182,7 @@ fn build_clif_sysroot_for_triple(
             process::exit(1);
         }
         Ok(source_version) => {
-            let rustc_version = get_rustc_version();
+            let rustc_version = get_rustc_version(&compiler.rustc);
             if source_version != rustc_version {
                 eprintln!("The patched sysroot source is outdated");
                 eprintln!("Source version: {}", source_version.trim());

build_system/prepare.rs

@@ -35,7 +35,7 @@ pub(crate) fn prepare(dirs: &Dirs) {
 }
 
 fn prepare_sysroot(dirs: &Dirs) {
-    let sysroot_src_orig = get_default_sysroot().join("lib/rustlib/src/rust");
+    let sysroot_src_orig = get_default_sysroot(Path::new("rustc")).join("lib/rustlib/src/rust");
     assert!(sysroot_src_orig.exists());
 
     eprintln!("[COPY] sysroot src");
@@ -50,7 +50,7 @@ fn prepare_sysroot(dirs: &Dirs) {
         &SYSROOT_SRC.to_path(dirs).join("library"),
     );
 
-    let rustc_version = get_rustc_version();
+    let rustc_version = get_rustc_version(Path::new("rustc"));
     fs::write(SYSROOT_RUSTC_VERSION.to_path(dirs), &rustc_version).unwrap();
 
     eprintln!("[GIT] init");

build_system/rustc_info.rs

@@ -1,9 +1,9 @@
 use std::path::{Path, PathBuf};
 use std::process::{Command, Stdio};
 
-pub(crate) fn get_rustc_version() -> String {
+pub(crate) fn get_rustc_version(rustc: &Path) -> String {
     let version_info =
-        Command::new("rustc").stderr(Stdio::inherit()).args(&["-V"]).output().unwrap().stdout;
+        Command::new(rustc).stderr(Stdio::inherit()).args(&["-V"]).output().unwrap().stdout;
     String::from_utf8(version_info).unwrap()
 }
 
@@ -53,8 +53,8 @@ pub(crate) fn get_rustdoc_path() -> PathBuf {
     Path::new(String::from_utf8(rustc_path).unwrap().trim()).to_owned()
 }
 
-pub(crate) fn get_default_sysroot() -> PathBuf {
-    let default_sysroot = Command::new("rustc")
+pub(crate) fn get_default_sysroot(rustc: &Path) -> PathBuf {
+    let default_sysroot = Command::new(rustc)
         .stderr(Stdio::inherit())
         .args(&["--print", "sysroot"])
         .output()