From bbd053216341cd3843b8f12da791f533e4480b8d Mon Sep 17 00:00:00 2001
From: Eric Huss <eric@huss.org>
Date: Tue, 8 Jun 2021 16:15:43 -0700
Subject: Test the linkchecker itself.

---
 src/bootstrap/builder/tests.rs |  5 +++++
 src/bootstrap/test.rs          | 17 +++++++++++++++++
 2 files changed, 22 insertions(+)

(limited to 'src')

diff --git a/src/bootstrap/builder/tests.rs b/src/bootstrap/builder/tests.rs
index 4d7c207e3ab..e7fb8c0d4d5 100644
--- a/src/bootstrap/builder/tests.rs
+++ b/src/bootstrap/builder/tests.rs
@@ -613,9 +613,14 @@ mod dist {
         // Note that the stages here are +1 than what they actually are because
         // Rustdoc::run swaps out the compiler with stage minus 1 if --stage is
         // not 0.
+        //
+        // The stage 0 copy is the one downloaded for bootstrapping. It is
+        // (currently) needed to run "cargo test" on the linkchecker, and
+        // should be relatively "free".
         assert_eq!(
             first(builder.cache.all::<tool::Rustdoc>()),
             &[
+                tool::Rustdoc { compiler: Compiler { host: a, stage: 0 } },
                 tool::Rustdoc { compiler: Compiler { host: a, stage: 1 } },
                 tool::Rustdoc { compiler: Compiler { host: a, stage: 2 } },
             ]
diff --git a/src/bootstrap/test.rs b/src/bootstrap/test.rs
index cc7c143d474..9debfee58e2 100644
--- a/src/bootstrap/test.rs
+++ b/src/bootstrap/test.rs
@@ -124,8 +124,25 @@ You can skip linkcheck with --exclude src/tools/linkchecker"
 
         builder.info(&format!("Linkcheck ({})", host));
 
+        // Test the linkchecker itself.
+        let bootstrap_host = builder.config.build;
+        let compiler = builder.compiler(0, bootstrap_host);
+        let cargo = tool::prepare_tool_cargo(
+            builder,
+            compiler,
+            Mode::ToolBootstrap,
+            bootstrap_host,
+            "test",
+            "src/tools/linkchecker",
+            SourceType::InTree,
+            &[],
+        );
+        try_run(builder, &mut cargo.into());
+
+        // Build all the default documentation.
         builder.default_doc(&[]);
 
+        // Run the linkchecker.
         let _time = util::timeit(&builder);
         try_run(
             builder,
-- 
cgit 1.4.1-3-g733a5