rustbuild: Add install target. #34675

It just prints to the screen currently.

src/bootstrap/install.rs

@@ -0,0 +1,22 @@
+// 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.
+
+//! Implementation of the install aspects of the compiler.
+//!
+//! This module is responsible for installing the standard library,
+//! compiler, and documentation.
+
+use Build;
+
+/// Installs everything.
+pub fn install(_: &Build, stage: u32, host: &str) {
+    println!("Install everything stage{} ({})", stage, host);
+    println!("Note: install currently does nothing.");
+}

src/bootstrap/lib.rs

@@ -62,6 +62,7 @@ mod config;
 mod dist;
 mod doc;
 mod flags;
+mod install;
 mod native;
 mod sanity;
 mod step;
@@ -453,6 +454,8 @@ impl Build {
                 DistStd { compiler } => dist::std(self, &compiler, target.target),
                 DistSrc { _dummy } => dist::rust_src(self),
 
+                Install { stage } => install::install(self, stage, target.target),
+
                 DebuggerScripts { stage } => {
                     let compiler = Compiler::new(stage, target.target);
                     dist::debugger_scripts(self,

src/bootstrap/mk/Makefile.in

@@ -51,6 +51,8 @@ check-cargotest:
 	$(Q)$(BOOTSTRAP) --step check-cargotest
 dist:
 	$(Q)$(BOOTSTRAP) --step dist
+install:
+	$(Q)$(BOOTSTRAP) --step install
 tidy:
 	$(Q)$(BOOTSTRAP) --step check-tidy --stage 0
 

src/bootstrap/step.rs

@@ -140,6 +140,9 @@ macro_rules! targets {
             (dist_std, DistStd { compiler: Compiler<'a> }),
             (dist_src, DistSrc { _dummy: () }),
 
+            // install target
+            (install, Install { stage: u32 }),
+
             // Misc targets
             (android_copy_libs, AndroidCopyLibs { compiler: Compiler<'a> }),
         }
@@ -249,8 +252,7 @@ fn top_level(build: &Build) -> Vec<Step> {
         }
     }
 
-    return targets
-
+    targets
 }
 
 fn add_steps<'a>(build: &'a Build,
@@ -467,7 +469,7 @@ impl<'a> Step<'a> {
                         self.dist(stage),
                     ]);
                 }
-                return base
+                base
             }
             Source::CheckLinkcheck { stage } => {
                 vec![self.tool_linkchecker(stage), self.doc(stage)]
@@ -590,7 +592,11 @@ impl<'a> Step<'a> {
                         base.push(target.dist_std(compiler));
                     }
                 }
-                return base
+                base
+            }
+
+            Source::Install { stage } => {
+                vec![self.dist(stage)]
             }
 
             Source::AndroidCopyLibs { compiler } => {