Auto merge of #112253 - matthiaskrgr:rollup-c37jpm5, r=matthiaskrgr

Rollup of 7 pull requests

Successful merges:

 - #111659 (suggest `Option::as_deref(_mut)` on type mismatch in option combinator if it passes typeck)
 - #111702 (Option::map_or_else: Show an example of integrating with Result)
 - #111878 (Fix codegen test suite for bare-metal-like targets)
 - #111969 (bootstrap: Make `clean` respect `dry-run`)
 - #111998 (Add other workspaces to `linkedProjects` in rust_analyzer_settings)
 - #112215 (only suppress coercion error if type is definitely unsized)
 - #112231 (Make sure the build.rustc version is either the same or 1 apart (revised))

r? `@ghost`
`@rustbot` modify labels: rollup

7 files changed, 67 insertions, 4 deletions

diff --git a/src/bootstrap/Cargo.lock b/src/bootstrap/Cargo.lock
index 311ac175160..8f8778efee7 100644
--- a/src/bootstrap/Cargo.lock
+++ b/src/bootstrap/Cargo.lock
@@ -58,6 +58,7 @@ dependencies = [
  "once_cell",
  "opener",
  "pretty_assertions",
+ "semver",
  "serde",
  "serde_derive",
  "serde_json",
@@ -646,6 +647,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
 
 [[package]]
+name = "semver"
+version = "1.0.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bebd363326d05ec3e2f532ab7660680f3b02130d780c299bca73469d521bc0ed"
+
+[[package]]
 name = "serde"
 version = "1.0.160"
 source = "registry+https://github.com/rust-lang/crates.io-index"
diff --git a/src/bootstrap/Cargo.toml b/src/bootstrap/Cargo.toml
index 70ade776d7d..367c6190967 100644
--- a/src/bootstrap/Cargo.toml
+++ b/src/bootstrap/Cargo.toml
@@ -57,6 +57,7 @@ walkdir = "2"
 sysinfo = { version = "0.26.0", optional = true }
 clap = { version = "4.2.4", default-features = false, features = ["std", "usage", "help", "derive", "error-context"] }
 clap_complete = "4.2.2"
+semver = "1.0.17"
 
 # Solaris doesn't support flock() and thus fd-lock is not option now
 [target.'cfg(not(target_os = "solaris"))'.dependencies]
diff --git a/src/bootstrap/clean.rs b/src/bootstrap/clean.rs
index 0d9fd56b038..c1d867a0bd1 100644
--- a/src/bootstrap/clean.rs
+++ b/src/bootstrap/clean.rs
@@ -85,6 +85,10 @@ clean_crate_tree! {
 }
 
 fn clean_default(build: &Build, all: bool) {
+    if build.config.dry_run() {
+        return;
+    }
+
     rm_rf("tmp".as_ref());
 
     if all {
diff --git a/src/bootstrap/config.rs b/src/bootstrap/config.rs
index 45ad1547eb7..8ea7e836375 100644
--- a/src/bootstrap/config.rs
+++ b/src/bootstrap/config.rs
@@ -25,6 +25,7 @@ use crate::flags::{Color, Flags, Warnings};
 use crate::util::{exe, output, t};
 use build_helper::detail_exit_macro;
 use once_cell::sync::OnceCell;
+use semver::Version;
 use serde::{Deserialize, Deserializer};
 use serde_derive::Deserialize;
 
@@ -1114,10 +1115,14 @@ impl Config {
             config.out = crate::util::absolute(&config.out);
         }
 
-        config.initial_rustc = build.rustc.map(PathBuf::from).unwrap_or_else(|| {
+        config.initial_rustc = if let Some(rustc) = build.rustc {
+            config.check_build_rustc_version(&rustc);
+            PathBuf::from(rustc)
+        } else {
             config.download_beta_toolchain();
             config.out.join(config.build.triple).join("stage0/bin/rustc")
-        });
+        };
+
         config.initial_cargo = build
             .cargo
             .map(|cargo| {
@@ -1779,6 +1784,42 @@ impl Config {
         self.rust_codegen_backends.get(0).cloned()
     }
 
+    pub fn check_build_rustc_version(&self, rustc_path: &str) {
+        if self.dry_run() {
+            return;
+        }
+
+        // check rustc version is same or lower with 1 apart from the building one
+        let mut cmd = Command::new(rustc_path);
+        cmd.arg("--version");
+        let rustc_output = output(&mut cmd)
+            .lines()
+            .next()
+            .unwrap()
+            .split(' ')
+            .nth(1)
+            .unwrap()
+            .split('-')
+            .next()
+            .unwrap()
+            .to_owned();
+        let rustc_version = Version::parse(&rustc_output.trim()).unwrap();
+        let source_version =
+            Version::parse(&fs::read_to_string(self.src.join("src/version")).unwrap().trim())
+                .unwrap();
+        if !(source_version == rustc_version
+            || (source_version.major == rustc_version.major
+                && source_version.minor == rustc_version.minor + 1))
+        {
+            let prev_version = format!("{}.{}.x", source_version.major, source_version.minor - 1);
+            eprintln!(
+                "Unexpected rustc version: {}, we should use {}/{} to build source with {}",
+                rustc_version, prev_version, source_version, source_version
+            );
+            detail_exit_macro!(1);
+        }
+    }
+
     /// Returns the commit to download, or `None` if we shouldn't download CI artifacts.
     fn download_ci_rustc_commit(&self, download_rustc: Option<StringOrBool>) -> Option<String> {
         // If `download-rustc` is not set, default to rebuilding.
diff --git a/src/bootstrap/setup.rs b/src/bootstrap/setup.rs
index 9b26d3f0a66..c604c63a4dd 100644
--- a/src/bootstrap/setup.rs
+++ b/src/bootstrap/setup.rs
@@ -31,6 +31,7 @@ static SETTINGS_HASHES: &[&str] = &[
     "ea67e259dedf60d4429b6c349a564ffcd1563cf41c920a856d1f5b16b4701ac8",
     "56e7bf011c71c5d81e0bf42e84938111847a810eee69d906bba494ea90b51922",
     "af1b5efe196aed007577899db9dae15d6dbc923d6fa42fa0934e68617ba9bbe0",
+    "3468fea433c25fff60be6b71e8a215a732a7b1268b6a83bf10d024344e140541",
 ];
 static RUST_ANALYZER_SETTINGS: &str = include_str!("../etc/rust_analyzer_settings.json");
 
diff --git a/src/etc/rust_analyzer_settings.json b/src/etc/rust_analyzer_settings.json
index dd01bfaa725..d9c4645f0b3 100644
--- a/src/etc/rust_analyzer_settings.json
+++ b/src/etc/rust_analyzer_settings.json
@@ -7,7 +7,14 @@
         "check",
         "--json-output"
     ],
-    "rust-analyzer.linkedProjects": ["src/bootstrap/Cargo.toml", "Cargo.toml"],
+    "rust-analyzer.linkedProjects": [
+        "Cargo.toml",
+        "src/tools/x/Cargo.toml",
+        "src/bootstrap/Cargo.toml",
+        "src/tools/rust-analyzer/Cargo.toml",
+        "compiler/rustc_codegen_cranelift/Cargo.toml",
+        "compiler/rustc_codegen_gcc/Cargo.toml"
+    ],
     "rust-analyzer.rustfmt.overrideCommand": [
         "./build/host/rustfmt/bin/rustfmt",
         "--edition=2021"
diff --git a/src/tools/x/Cargo.lock b/src/tools/x/Cargo.lock
index 723d6cb25ed..09e5c750749 100644
--- a/src/tools/x/Cargo.lock
+++ b/src/tools/x/Cargo.lock
@@ -1,5 +1,7 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "x"
-version = "0.1.0"
+version = "0.1.1"