Add a file to trivially disable tool building or testing

src/bootstrap/check.rs

@@ -23,7 +23,7 @@ use std::path::{PathBuf, Path};
 use std::process::Command;
 use std::io::Read;
 
-use build_helper::{self, output};
+use build_helper::{self, output, BuildExpectation};
 
 use builder::{Kind, RunConfig, ShouldRun, Builder, Compiler, Step};
 use cache::{INTERNER, Interned};
@@ -33,6 +33,7 @@ use native;
 use tool::{self, Tool};
 use util::{self, dylib_path, dylib_path_var};
 use {Build, Mode};
+use toolstate::ToolState;
 
 const ADB_TEST_DIR: &str = "/data/tmp/work";
 
@@ -64,17 +65,21 @@ impl fmt::Display for TestKind {
     }
 }
 
-fn try_run(build: &Build, cmd: &mut Command) {
+fn try_run_expecting(build: &Build, cmd: &mut Command, expect: BuildExpectation) {
     if !build.fail_fast {
-        if !build.try_run(cmd) {
+        if !build.try_run(cmd, expect) {
             let failures = build.delayed_failures.get();
             build.delayed_failures.set(failures + 1);
         }
     } else {
-        build.run(cmd);
+        build.run_expecting(cmd, expect);
     }
 }
 
+fn try_run(build: &Build, cmd: &mut Command) {
+    try_run_expecting(build, cmd, BuildExpectation::None)
+}
+
 fn try_run_quiet(build: &Build, cmd: &mut Command) {
     if !build.fail_fast {
         if !build.try_run_quiet(cmd) {
@@ -333,7 +338,11 @@ impl Step for Miri {
 
         builder.add_rustc_lib_path(compiler, &mut cargo);
 
-        try_run(build, &mut cargo);
+        try_run_expecting(
+            build,
+            &mut cargo,
+            builder.build.config.toolstate.miri.passes(ToolState::Testing),
+        );
     }
 }
 

src/bootstrap/config.rs

@@ -27,6 +27,7 @@ use util::exe;
 use cache::{INTERNER, Interned};
 use flags::Flags;
 pub use flags::Subcommand;
+use toolstate::ToolStates;
 
 /// Global configuration for the entire build and/or bootstrap.
 ///
@@ -131,6 +132,8 @@ pub struct Config {
     // These are either the stage0 downloaded binaries or the locally installed ones.
     pub initial_cargo: PathBuf,
     pub initial_rustc: PathBuf,
+
+    pub toolstate: ToolStates,
 }
 
 /// Per-target configuration stored in the global configuration structure.
@@ -333,6 +336,18 @@ impl Config {
             }
         }).unwrap_or_else(|| TomlConfig::default());
 
+        let toolstate_toml_path = config.src.join("src/tools/toolstate.toml");
+        let parse_toolstate = || -> Result<_, Box<::std::error::Error>> {
+            let mut f = File::open(toolstate_toml_path)?;
+            let mut contents = String::new();
+            f.read_to_string(&mut contents)?;
+            Ok(toml::from_str(&contents)?)
+        };
+        config.toolstate = parse_toolstate().unwrap_or_else(|err| {
+            println!("failed to parse TOML configuration 'toolstate.toml': {}", err);
+            process::exit(2);
+        });
+
         let build = toml.build.clone().unwrap_or(Build::default());
         set(&mut config.build, build.build.clone().map(|x| INTERNER.intern_string(x)));
         set(&mut config.build, flags.build);

src/bootstrap/lib.rs

@@ -143,7 +143,8 @@ use std::path::{PathBuf, Path};
 use std::process::Command;
 use std::slice;
 
-use build_helper::{run_silent, run_suppressed, try_run_silent, try_run_suppressed, output, mtime};
+use build_helper::{run_silent, run_suppressed, try_run_silent, try_run_suppressed, output, mtime,
+                   BuildExpectation};
 
 use util::{exe, libdir, OutputFolder, CiEnv};
 
@@ -164,6 +165,7 @@ pub mod util;
 mod builder;
 mod cache;
 mod tool;
+mod toolstate;
 
 #[cfg(windows)]
 mod job;
@@ -542,32 +544,39 @@ impl Build {
             .join(libdir(&self.config.build))
     }
 
+    /// Runs a command, printing out nice contextual information if its build
+    /// status is not the expected one
+    fn run_expecting(&self, cmd: &mut Command, expect: BuildExpectation) {
+        self.verbose(&format!("running: {:?}", cmd));
+        run_silent(cmd, expect)
+    }
+
     /// Runs a command, printing out nice contextual information if it fails.
     fn run(&self, cmd: &mut Command) {
-        self.verbose(&format!("running: {:?}", cmd));
-        run_silent(cmd)
+        self.run_expecting(cmd, BuildExpectation::None)
     }
 
     /// Runs a command, printing out nice contextual information if it fails.
     fn run_quiet(&self, cmd: &mut Command) {
         self.verbose(&format!("running: {:?}", cmd));
-        run_suppressed(cmd)
+        run_suppressed(cmd, BuildExpectation::None)
     }
 
-    /// Runs a command, printing out nice contextual information if it fails.
-    /// Exits if the command failed to execute at all, otherwise returns its
-    /// `status.success()`.
-    fn try_run(&self, cmd: &mut Command) -> bool {
+    /// Runs a command, printing out nice contextual information if its build
+    /// status is not the expected one.
+    /// Exits if the command failed to execute at all, otherwise returns whether
+    /// the expectation was met
+    fn try_run(&self, cmd: &mut Command, expect: BuildExpectation) -> bool {
         self.verbose(&format!("running: {:?}", cmd));
-        try_run_silent(cmd)
+        try_run_silent(cmd, expect)
     }
 
     /// Runs a command, printing out nice contextual information if it fails.
     /// Exits if the command failed to execute at all, otherwise returns its
     /// `status.success()`.
     fn try_run_quiet(&self, cmd: &mut Command) -> bool {
         self.verbose(&format!("running: {:?}", cmd));
-        try_run_suppressed(cmd)
+        try_run_suppressed(cmd, BuildExpectation::None)
     }
 
     pub fn is_verbose(&self) -> bool {

src/bootstrap/tool.rs

@@ -21,6 +21,8 @@ use compile::{self, libtest_stamp, libstd_stamp, librustc_stamp};
 use native;
 use channel::GitInfo;
 use cache::Interned;
+use toolstate::ToolState;
+use build_helper::BuildExpectation;
 
 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
 pub struct CleanTools {
@@ -64,6 +66,7 @@ struct ToolBuild {
     tool: &'static str,
     path: &'static str,
     mode: Mode,
+    expectation: BuildExpectation,
 }
 
 impl Step for ToolBuild {
@@ -83,6 +86,7 @@ impl Step for ToolBuild {
         let target = self.target;
         let tool = self.tool;
         let path = self.path;
+        let expectation = self.expectation;
 
         match self.mode {
             Mode::Libstd => builder.ensure(compile::Std { compiler, target }),
@@ -95,7 +99,7 @@ impl Step for ToolBuild {
         println!("Building stage{} tool {} ({})", compiler.stage, tool, target);
 
         let mut cargo = prepare_tool_cargo(builder, compiler, target, "build", path);
-        build.run(&mut cargo);
+        build.run_expecting(&mut cargo, expectation);
         build.cargo_out(compiler, Mode::Tool, target).join(exe(tool, &compiler.host))
     }
 }
@@ -200,6 +204,7 @@ macro_rules! tool {
                     tool: $tool_name,
                     mode: $mode,
                     path: $path,
+                    expectation: BuildExpectation::None,
                 })
             }
         }
@@ -247,6 +252,7 @@ impl Step for RemoteTestServer {
             tool: "remote-test-server",
             mode: Mode::Libstd,
             path: "src/tools/remote-test-server",
+            expectation: BuildExpectation::None,
         })
     }
 }
@@ -359,6 +365,7 @@ impl Step for Cargo {
             tool: "cargo",
             mode: Mode::Librustc,
             path: "src/tools/cargo",
+            expectation: BuildExpectation::None,
         })
     }
 }
@@ -398,6 +405,7 @@ impl Step for Clippy {
             tool: "clippy",
             mode: Mode::Librustc,
             path: "src/tools/clippy",
+            expectation: BuildExpectation::None,
         })
     }
 }
@@ -441,6 +449,7 @@ impl Step for Rls {
             tool: "rls",
             mode: Mode::Librustc,
             path: "src/tools/rls",
+            expectation: BuildExpectation::None,
         })
     }
 }
@@ -492,8 +501,8 @@ impl Step for Miri {
     const ONLY_HOSTS: bool = true;
 
     fn should_run(run: ShouldRun) -> ShouldRun {
-        let builder = run.builder;
-        run.path("src/tools/miri").default_condition(builder.build.config.test_miri)
+        let build_miri = run.builder.build.config.test_miri;
+        run.path("src/tools/miri").default_condition(build_miri)
     }
 
     fn make_run(run: RunConfig) {
@@ -510,6 +519,7 @@ impl Step for Miri {
             tool: "miri",
             mode: Mode::Librustc,
             path: "src/tools/miri",
+            expectation: builder.build.config.toolstate.miri.passes(ToolState::Compiling),
         })
     }
 }

src/bootstrap/toolstate.rs

@@ -0,0 +1,48 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use build_helper::BuildExpectation;
+
+#[derive(Copy, Clone, Debug, Deserialize, PartialEq, Eq)]
+/// Whether a tool can be compiled, tested or neither
+pub enum ToolState {
+    /// The tool compiles successfully, but the test suite fails
+    Compiling = 1,
+    /// The tool compiles successfully and its test suite passes
+    Testing = 2,
+    /// The tool can't even be compiled
+    Broken = 0,
+}
+
+impl ToolState {
+    /// If a tool with the current toolstate should be working on
+    /// the given toolstate
+    pub fn passes(self, other: ToolState) -> BuildExpectation {
+        if self as usize >= other as usize {
+            BuildExpectation::Succeeding
+        } else {
+            BuildExpectation::Failing
+        }
+    }
+}
+
+impl Default for ToolState {
+    fn default() -> Self {
+        // err on the safe side
+        ToolState::Broken
+    }
+}
+
+#[derive(Copy, Clone, Debug, Deserialize, Default)]
+/// Used to express which tools should (not) be compiled or tested.
+/// This is created from `toolstate.toml`.
+pub struct ToolStates {
+    pub miri: ToolState,
+}