Add snapshot test for disting compiler docs

Author: Kobzol

src/bootstrap/src/core/builder/tests.rs

@@ -1130,6 +1130,59 @@ mod snapshot {
         );
     }
 
+    #[test]
+    fn dist_compiler_docs() {
+        let ctx = TestCtx::new();
+        insta::assert_snapshot!(
+            ctx.config("dist")
+                .path("rustc-docs")
+                .args(&["--set", "build.compiler-docs=true"])
+                .render_steps(), @r"
+        [build] rustc 0 <host> -> UnstableBookGen 1 <host>
+        [build] rustc 0 <host> -> Rustbook 1 <host>
+        [doc] unstable-book (book) <host>
+        [build] llvm <host>
+        [build] rustc 0 <host> -> rustc 1 <host>
+        [build] rustc 1 <host> -> std 1 <host>
+        [doc] book (book) <host>
+        [doc] book/first-edition (book) <host>
+        [doc] book/second-edition (book) <host>
+        [doc] book/2018-edition (book) <host>
+        [build] rustdoc 1 <host>
+        [doc] rustc 1 <host> -> standalone 2 <host>
+        [doc] rustc 1 <host> -> std 1 <host> crates=[alloc,compiler_builtins,core,panic_abort,panic_unwind,proc_macro,rustc-std-workspace-core,std,std_detect,sysroot,test,unwind]
+        [doc] rustc 1 <host> -> rustc 2 <host>
+        [build] rustc 1 <host> -> rustc 2 <host>
+        [doc] rustc 1 <host> -> Rustdoc 2 <host>
+        [doc] rustc 1 <host> -> Rustfmt 2 <host>
+        [build] rustc 1 <host> -> error-index 2 <host>
+        [doc] rustc 1 <host> -> error-index 2 <host>
+        [doc] nomicon (book) <host>
+        [doc] rustc 1 <host> -> reference (book) 2 <host>
+        [doc] rustdoc (book) <host>
+        [doc] rust-by-example (book) <host>
+        [build] rustc 0 <host> -> LintDocs 1 <host>
+        [doc] rustc (book) <host>
+        [doc] rustc 1 <host> -> Cargo 2 <host>
+        [doc] cargo (book) <host>
+        [doc] rustc 1 <host> -> Clippy 2 <host>
+        [doc] clippy (book) <host>
+        [doc] rustc 1 <host> -> Miri 2 <host>
+        [doc] embedded-book (book) <host>
+        [doc] edition-guide (book) <host>
+        [doc] style-guide (book) <host>
+        [build] rustdoc 0 <host>
+        [doc] rustc 0 <host> -> Tidy 1 <host>
+        [doc] rustc 0 <host> -> Bootstrap 1 <host>
+        [doc] rustc 1 <host> -> releases 2 <host>
+        [doc] rustc 0 <host> -> RunMakeSupport 1 <host>
+        [doc] rustc 0 <host> -> BuildHelper 1 <host>
+        [doc] rustc 0 <host> -> Compiletest 1 <host>
+        [build] rustc 0 <host> -> RustInstaller 1 <host>
+        "
+        );
+    }
+
     #[test]
     fn dist_extended() {
         let ctx = TestCtx::new();
@@ -2473,7 +2526,6 @@ mod snapshot {
         [doc] rustc 0 <host> -> Cargo 1 <host>
         ");
     }
-
     #[test]
     fn doc_cargo_stage_2() {
         let ctx = TestCtx::new();