Auto merge of #115514 - onur-ozkan:bootstrap-codebase-improvements, r=albertlarsan68

optimize and cleanup bootstrap source

I suggest reviewing this commit by commit.

1 files changed, 6 insertions, 13 deletions

diff --git a/src/bootstrap/bin/rustdoc.rs b/src/bootstrap/bin/rustdoc.rs
index 4ecb3349816..6561c1c1933 100644
--- a/src/bootstrap/bin/rustdoc.rs
+++ b/src/bootstrap/bin/rustdoc.rs
@@ -9,14 +9,14 @@ use std::process::{exit, Command};
 
 include!("../dylib_util.rs");
 
+include!("./_helper.rs");
+
 fn main() {
     let args = env::args_os().skip(1).collect::<Vec<_>>();
-    let stage = env::var("RUSTC_STAGE").unwrap_or_else(|_| {
-        // Don't panic here; it's reasonable to try and run these shims directly. Give a helpful error instead.
-        eprintln!("rustc shim: fatal: RUSTC_STAGE was not set");
-        eprintln!("rustc shim: note: use `x.py build -vvv` to see all environment variables set by bootstrap");
-        exit(101);
-    });
+
+    let stage = parse_rustc_stage();
+    let verbose = parse_rustc_verbose();
+
     let rustdoc = env::var_os("RUSTDOC_REAL").expect("RUSTDOC_REAL was not set");
     let libdir = env::var_os("RUSTDOC_LIBDIR").expect("RUSTDOC_LIBDIR was not set");
     let sysroot = env::var_os("RUSTC_SYSROOT").expect("RUSTC_SYSROOT was not set");
@@ -25,13 +25,6 @@ fn main() {
     // is passed (a bit janky...)
     let target = args.windows(2).find(|w| &*w[0] == "--target").and_then(|w| w[1].to_str());
 
-    use std::str::FromStr;
-
-    let verbose = match env::var("RUSTC_VERBOSE") {
-        Ok(s) => usize::from_str(&s).expect("RUSTC_VERBOSE should be an integer"),
-        Err(_) => 0,
-    };
-
     let mut dylib_path = dylib_path();
     dylib_path.insert(0, PathBuf::from(libdir.clone()));