Add enable-missing-tools option

src/bootstrap/config.rs

@@ -134,6 +134,7 @@ pub struct Config {
     pub test_miri: bool,
     pub save_toolstates: Option<PathBuf>,
     pub print_step_timings: bool,
+    pub missing_tools: bool,
 
     // Fallback musl-root for all targets
     pub musl_root: Option<PathBuf>,
@@ -375,6 +376,7 @@ impl Config {
         config.rust_codegen_backends = vec![INTERNER.intern_str("llvm")];
         config.rust_codegen_backends_dir = "codegen-backends".to_owned();
         config.deny_warnings = true;
+        config.missing_tools = false;
 
         // set by bootstrap.py
         config.build = INTERNER.intern_str(&env::var("BUILD").expect("'BUILD' to be set"));

src/bootstrap/configure.py

@@ -69,6 +69,7 @@ def v(*args):
 o("emscripten", None, "compile the emscripten backend as well as LLVM")
 o("full-tools", None, "enable all tools")
 o("lldb", "rust.lldb", "build lldb")
+o("enable-missing-tools", "build.missing-tools", "allow failures when building tools")
 
 # Optimization and debugging options. These may be overridden by the release
 # channel, etc.

src/bootstrap/dist.rs

@@ -67,6 +67,14 @@ fn rust_installer(builder: &Builder) -> Command {
     builder.tool_cmd(Tool::RustInstaller)
 }
 
+fn missing_tool(tool_name: &str, skip: bool) {
+    if skip {
+        println!("Unable to build {}, skipping dist", tool_name)
+    } else {
+        panic!("Unable to build {}", tool_name)
+    }
+}
+
 #[derive(Debug, PartialOrd, Ord, Copy, Clone, Hash, PartialEq, Eq)]
 pub struct Docs {
     pub stage: u32,
@@ -1166,7 +1174,7 @@ impl Step for Rls {
         let rls = builder.ensure(tool::Rls {
             compiler: builder.compiler(stage, builder.config.build),
             target, extra_features: Vec::new()
-        }).or_else(|| { println!("Unable to build RLS, skipping dist"); None })?;
+        }).or_else(|| { missing_tool("RLS", builder.build.config.missing_tools); None })?;
 
         builder.install(&rls, &image.join("bin"), 0o755);
         let doc = image.join("share/doc/rls");
@@ -1245,11 +1253,11 @@ impl Step for Clippy {
         let clippy = builder.ensure(tool::Clippy {
             compiler: builder.compiler(stage, builder.config.build),
             target, extra_features: Vec::new()
-        }).or_else(|| { println!("Unable to build clippy, skipping dist"); None })?;
+        }).or_else(|| { missing_tool("clippy", builder.build.config.missing_tools); None })?;
         let cargoclippy = builder.ensure(tool::CargoClippy {
             compiler: builder.compiler(stage, builder.config.build),
             target, extra_features: Vec::new()
-        }).or_else(|| { println!("Unable to build cargo clippy, skipping dist"); None })?;
+        }).or_else(|| { missing_tool("cargo clippy", builder.build.config.missing_tools); None })?;
 
         builder.install(&clippy, &image.join("bin"), 0o755);
         builder.install(&cargoclippy, &image.join("bin"), 0o755);
@@ -1324,11 +1332,11 @@ impl Step for Rustfmt {
         let rustfmt = builder.ensure(tool::Rustfmt {
             compiler: builder.compiler(stage, builder.config.build),
             target, extra_features: Vec::new()
-        }).or_else(|| { println!("Unable to build Rustfmt, skipping dist"); None })?;
+        }).or_else(|| { missing_tool("Rustfmt", builder.build.config.missing_tools); None })?;
         let cargofmt = builder.ensure(tool::Cargofmt {
             compiler: builder.compiler(stage, builder.config.build),
             target, extra_features: Vec::new()
-        }).or_else(|| { println!("Unable to build Cargofmt, skipping dist"); None })?;
+        }).or_else(|| { missing_tool("Cargofmt", builder.build.config.missing_tools); None })?;
 
         builder.install(&rustfmt, &image.join("bin"), 0o755);
         builder.install(&cargofmt, &image.join("bin"), 0o755);

src/ci/run.sh

@@ -76,6 +76,10 @@ else
   fi
 fi
 
+if [ "$RUST_RELEASE_CHANNEL" = "nightly" ] or [ "$DIST_REQUIRE_ALL_TOOLS" = "" ]; then
+    RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --enable-missing-tools"
+fi
+
 # We've had problems in the past of shell scripts leaking fds into the sccache
 # server (#48192) which causes Cargo to erroneously think that a build script
 # hasn't finished yet. Try to solve that problem by starting a very long-lived