rustc: Remove CrateId and all related support

This commit removes all support in the compiler for the #[crate_id] attribute
and all of its derivative infrastructure. A list of the functionality removed is:

* The #[crate_id] attribute no longer exists
* There is no longer the concept of a version of a crate
* Version numbers are no longer appended to symbol names
* The --crate-id command line option has been removed

To migrate forward, rename #[crate_id] to #[crate_name] and only the name of the
crate itself should be mentioned. The version/path of the old crate id should be
removed.

For a transitionary state, the #[crate_id] attribute is still accepted if
the #[crate_name] is not present, but it is warned about if it is the only
identifier present.

RFC: 0035-remove-crate-id
[breaking-change]

1 files changed, 11 insertions, 3 deletions

diff --git a/src/librustdoc/core.rs b/src/librustdoc/core.rs
index 245b2d162a7..058face151c 100644
--- a/src/librustdoc/core.rs
+++ b/src/librustdoc/core.rs
@@ -12,6 +12,7 @@ use rustc;
 use rustc::{driver, middle};
 use rustc::middle::{privacy, ty};
 use rustc::lint;
+use rustc::back::link;
 
 use syntax::ast;
 use syntax::parse::token;
@@ -83,7 +84,8 @@ fn get_ast_and_resolve(cpath: &Path, libs: HashSet<Path>, cfgs: Vec<String>)
     use rustc::driver::driver::{FileInput,
                                 phase_1_parse_input,
                                 phase_2_configure_and_expand,
-                                phase_3_run_analysis_passes};
+                                phase_3_run_analysis_passes,
+                                build_output_filenames};
     use rustc::driver::config::build_configuration;
 
     let input = FileInput(cpath.clone());
@@ -115,13 +117,19 @@ fn get_ast_and_resolve(cpath: &Path, libs: HashSet<Path>, cfgs: Vec<String>)
     }
 
     let krate = phase_1_parse_input(&sess, cfg, &input);
+
+    let t_outputs = build_output_filenames(&input, &None, &None,
+                                           krate.attrs.as_slice(), &sess);
+    let name = link::find_crate_name(Some(&sess), krate.attrs.as_slice(),
+                                     t_outputs.out_filestem.as_slice());
+
     let (krate, ast_map)
-        = phase_2_configure_and_expand(&sess, krate, &from_str("rustdoc").unwrap())
+        = phase_2_configure_and_expand(&sess, krate, name.as_slice())
             .expect("phase_2_configure_and_expand aborted in rustdoc!");
 
     let driver::driver::CrateAnalysis {
         exported_items, public_items, ty_cx, ..
-    } = phase_3_run_analysis_passes(sess, &krate, ast_map);
+    } = phase_3_run_analysis_passes(sess, &krate, ast_map, name);
 
     debug!("crate: {:?}", krate);
     (DocContext {