Separate the driver into its own crate that uses trans, typeck.

mk/crates.mk

@@ -53,8 +53,8 @@ TARGET_CRATES := libc std flate arena term \
                  serialize getopts collections test time rand \
                  log regex graphviz core rbml alloc rustrt \
                  unicode
-HOST_CRATES := syntax rustc rustc_typeck rustc_trans rustdoc regex_macros fmt_macros \
-	       rustc_llvm rustc_back
+RUSTC_CRATES := rustc rustc_typeck rustc_driver rustc_trans rustc_back rustc_llvm 
+HOST_CRATES := syntax $(RUSTC_CRATES) rustdoc regex_macros fmt_macros
 CRATES := $(TARGET_CRATES) $(HOST_CRATES)
 TOOLS := compiletest rustdoc rustc
 
@@ -67,14 +67,16 @@ DEPS_std := core libc rand alloc collections rustrt unicode \
 	native:rust_builtin native:backtrace
 DEPS_graphviz := std
 DEPS_syntax := std term serialize log fmt_macros arena libc
+DEPS_rustc_driver := arena flate getopts graphviz libc rustc rustc_back \
+                     rustc_typeck log syntax serialize rustc_llvm rustc_trans
 DEPS_rustc_trans := arena flate getopts graphviz libc rustc rustc_back \
-                    rustc_typeck log syntax serialize rustc_llvm
+	                log syntax serialize rustc_llvm
 DEPS_rustc_typeck := rustc syntax
 DEPS_rustc := syntax flate arena serialize getopts rbml \
               time log graphviz rustc_llvm rustc_back
 DEPS_rustc_llvm := native:rustllvm libc std
 DEPS_rustc_back := std syntax rustc_llvm flate log libc
-DEPS_rustdoc := rustc rustc_trans native:hoedown serialize getopts \
+DEPS_rustdoc := rustc rustc_driver native:hoedown serialize getopts \
                 test time
 DEPS_flate := std native:miniz
 DEPS_arena := std
@@ -96,7 +98,7 @@ DEPS_fmt_macros = std
 
 TOOL_DEPS_compiletest := test getopts
 TOOL_DEPS_rustdoc := rustdoc
-TOOL_DEPS_rustc := rustc_trans
+TOOL_DEPS_rustc := rustc_driver
 TOOL_SOURCE_compiletest := $(S)src/compiletest/compiletest.rs
 TOOL_SOURCE_rustdoc := $(S)src/driver/driver.rs
 TOOL_SOURCE_rustc := $(S)src/driver/driver.rs
@@ -115,8 +117,9 @@ ONLY_RLIB_unicode := 1
 DOC_CRATES := $(filter-out rustc, \
               $(filter-out rustc_trans, \
               $(filter-out rustc_typeck, \
-              $(filter-out syntax, $(CRATES)))))
-COMPILER_DOC_CRATES := rustc rustc_trans rustc_typeck syntax
+              $(filter-out rustc_driver, \
+              $(filter-out syntax, $(CRATES))))))
+COMPILER_DOC_CRATES := rustc rustc_trans rustc_typeck rustc_driver syntax
 
 # This macro creates some simple definitions for each crate being built, just
 # some munging of all of the parameters above.

src/driver/driver.rs

@@ -12,6 +12,6 @@
 extern crate "rustdoc" as this;
 
 #[cfg(rustc)]
-extern crate "rustc_trans" as this;
+extern crate "rustc_driver" as this;
 
 fn main() { this::main() }

src/librustc_trans/driver/driver.rs → src/librustc_driver/driver.rs

@@ -8,22 +8,22 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use back::link;
-use back::write;
-use session::Session;
-use session::config::{mod, Input, OutputFilenames};
-use lint;
-use metadata::creader;
-use middle::{stability, ty, reachable};
-use middle::dependency_format;
-use middle;
-use plugin::load::Plugins;
-use plugin::registry::Registry;
-use plugin;
+use rustc::session::Session;
+use rustc::session::config::{mod, Input, OutputFilenames};
+use rustc::lint;
+use rustc::metadata::creader;
+use rustc::middle::{stability, ty, reachable};
+use rustc::middle::dependency_format;
+use rustc::middle;
+use rustc::plugin::load::Plugins;
+use rustc::plugin::registry::Registry;
+use rustc::plugin;
+use rustc::util::common::time;
+use rustc_trans::back::link;
+use rustc_trans::back::write;
+use rustc_trans::save;
+use rustc_trans::trans;
 use rustc_typeck as typeck;
-use trans;
-
-use util::common::time;
 
 use serialize::{json, Encodable};
 
@@ -31,7 +31,6 @@
 use std::io::fs;
 use std::os;
 use arena::TypedArena;
-use save;
 use syntax::ast;
 use syntax::ast_map;
 use syntax::attr;

src/librustc_trans/driver/mod.rs → src/librustc_driver/lib.rs

-// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
@@ -8,15 +8,46 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-pub use syntax::diagnostic;
+//! The Rust compiler.
+//!
+//! # Note
+//!
+//! This API is completely unstable and subject to change.
+
+#![crate_name = "rustc_driver"]
+#![experimental]
+#![crate_type = "dylib"]
+#![crate_type = "rlib"]
+#![doc(html_logo_url = "http://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
+      html_favicon_url = "http://www.rust-lang.org/favicon.ico",
+      html_root_url = "http://doc.rust-lang.org/nightly/")]
+
+#![feature(default_type_params, globs, if_let, import_shadowing, macro_rules, phase, quote)]
+#![feature(slicing_syntax, unsafe_destructor)]
+#![feature(rustc_diagnostic_macros)]
+
+extern crate arena;
+extern crate flate;
+extern crate getopts;
+extern crate graphviz;
+extern crate libc;
+extern crate rustc;
+extern crate rustc_typeck;
+extern crate rustc_back;
+extern crate rustc_trans;
+#[phase(plugin, link)] extern crate log;
+#[phase(plugin, link)] extern crate syntax;
+extern crate serialize;
+extern crate "rustc_llvm" as llvm;
 
-use back::link;
-use session::{config, Session, build_session};
-use session::config::Input;
-use lint::Lint;
-use lint;
-use metadata;
+pub use syntax::diagnostic;
 
+use rustc_trans::back::link;
+use rustc::session::{config, Session, build_session};
+use rustc::session::config::Input;
+use rustc::lint::Lint;
+use rustc::lint;
+use rustc::metadata;
 use rustc::DIAGNOSTICS;
 
 use std::any::AnyRefExt;
@@ -24,14 +55,15 @@
 use std::os;
 use std::task::TaskBuilder;
 
-use session::early_error;
+use rustc::session::early_error;
 
 use syntax::ast;
 use syntax::parse;
 use syntax::diagnostic::Emitter;
 use syntax::diagnostics;
 
-use getopts;
+#[cfg(test)]
+pub mod test;
 
 pub mod driver;
 pub mod pretty;
@@ -507,3 +539,9 @@ pub fn monitor(f: proc():Send) {
     }
 }
 
+pub fn main() {
+    let args = std::os::args();
+    let result = run(args);
+    std::os::set_exit_status(result);
+}
+

src/librustc_driver/mod.rs

+// Copyright 2012 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.
+

src/librustc_trans/driver/pretty.rs → src/librustc_driver/pretty.rs

@@ -15,19 +15,18 @@
 pub use self::PpMode::*;
 use self::NodesMatchingUII::*;
 
-use back::link;
-
-use session::Session;
-use session::config::{mod, Input};
-use driver::driver::{mod};
-
-use middle::ty;
-use middle::borrowck::{mod, FnPartsWithCFG};
-use middle::borrowck::graphviz as borrowck_dot;
-use middle::cfg;
-use middle::cfg::graphviz::LabelledCFG;
-
-use util::ppaux;
+use rustc_trans::back::link;
+
+use driver;
+
+use rustc::middle::ty;
+use rustc::middle::borrowck::{mod, FnPartsWithCFG};
+use rustc::middle::borrowck::graphviz as borrowck_dot;
+use rustc::middle::cfg;
+use rustc::middle::cfg::graphviz::LabelledCFG;
+use rustc::session::Session;
+use rustc::session::config::{mod, Input};
+use rustc::util::ppaux;
 
 use syntax::ast;
 use syntax::ast_map::{mod, blocks, NodePrinter};

src/librustc_trans/lib.rs

@@ -32,7 +32,6 @@
 extern crate graphviz;
 extern crate libc;
 extern crate rustc;
-extern crate rustc_typeck;
 extern crate rustc_back;
 #[phase(plugin, link)] extern crate log;
 #[phase(plugin, link)] extern crate syntax;
@@ -66,17 +65,7 @@ pub mod back {
 
 pub mod trans;
 pub mod save;
-pub mod driver;
 
 pub mod lib {
     pub use llvm;
 }
-
-pub fn main() {
-    let args = std::os::args();
-    let result = driver::run(args);
-    std::os::set_exit_status(result);
-}
-
-#[cfg(test)]
-pub mod test;

src/librustdoc/core.rs

@@ -9,7 +9,7 @@
 // except according to those terms.
 pub use self::MaybeTyped::*;
 
-use rustc_trans::driver::driver;
+use rustc_driver::driver;
 use rustc::session::{mod, config};
 use rustc::middle::{privacy, ty};
 use rustc::lint;

src/librustdoc/lib.rs

@@ -21,6 +21,7 @@
 extern crate libc;
 extern crate rustc;
 extern crate rustc_trans;
+extern crate rustc_driver;
 extern crate serialize;
 extern crate syntax;
 extern crate "test" as testing;
@@ -163,7 +164,7 @@ pub fn main_args(args: &[String]) -> int {
         usage(args[0].as_slice());
         return 0;
     } else if matches.opt_present("version") {
-        match rustc_trans::driver::version("rustdoc", &matches) {
+        match rustc_driver::version("rustdoc", &matches) {
             Some(err) => {
                 println!("{}", err);
                 return 1

src/librustdoc/test.rs

@@ -19,7 +19,7 @@
 use std::collections::{HashSet, HashMap};
 use testing;
 use rustc::session::{mod, config};
-use rustc_trans::driver::driver;
+use rustc_driver::driver;
 use syntax::ast;
 use syntax::codemap::{CodeMap, dummy_spanned};
 use syntax::diagnostic;