Upgrading rust to 1.2.0

[Sean Farley]

I've been looking at rust and thought I'd upgrade it to 1.2.0. I think
the bootstrapping is no longer needed since version 1.0 (the one we were
using was old as well).

Here is the patch I've come up with for upgrading. I was hoping to get
some feedback from those that know rust better than I. Thanks!


# HG changeset patch
# User Sean Farley <sean at farley.io>
# Date 1441301774 25200
#      Thu Sep 03 10:36:14 2015 -0700
# Node ID 7e8d821769e7bd4fd3083688841bc505afe5e779
# Parent  b7d548b79f4fec0a1126d3a47e96c12584ff975e
rust: update to 1.2.0 and prefer clang

This also drops the code to download a specific staging distribution because
rust has been able to do that since 1.0.0.

diff --git a/dports/lang/rust/Portfile b/dports/lang/rust/Portfile
--- a/dports/lang/rust/Portfile
+++ b/dports/lang/rust/Portfile
@@ -4,11 +4,11 @@
 PortSystem          1.0
 PortGroup           active_variants 1.1
 PortGroup           compiler_blacklist_versions 1.0
 
 name                rust
-version             1.0.0
+version             1.2.0
 categories          lang devel
 platforms           darwin
 supported_archs     i386 x86_64
 # https://github.com/mozilla/rust/issues/2024
 universal_variant   no
@@ -37,43 +37,18 @@ pre-fetch {
 # snapshot compiler, we let base treat it as the distfile and deal with
 # the actual Rust source "manually".
 
 # Download the snapshot compiler; see src/snapshots.txt in the Rust
 # distribution.
-master_sites            https://static.rust-lang.org/dist/:main \
-                        https://static.rust-lang.org/stage0-snapshots/:snap
+master_sites            https://static.rust-lang.org/dist/:main
 
 distfiles               ${name}c-${version}-src${extract.suffix}:main
 worksrcdir              ${name}c-${version}
 
 checksums               ${name}c-${version}-src${extract.suffix} \
-                            rmd160  b1127e616619fcd981e33896d4f00c4bf548ce6b \
-                            sha256  c304cbd4f7b25d116b73c249f66bdb5c9da8645855ce195a41bda5077b995eba
-
-set stage0(distdir)     rust-stage0
-set stage0(date)        2015-03-27
-set stage0(rev)         5520801
-set stage0(platform)    macos-${configure.build_arch}
-set stage0(hash)        [expr {${configure.build_arch} eq "i386" ?
-                                "0310b1a970f2da7e61770fd14dbbbdca3b518234" :
-                                "5f35d9c920b8083a7420ef8cf5b00d5ef3085dfa"}]
-
-set stage0_name         [join "rust stage0 ${stage0(date)}
-                                           ${stage0(rev)}
-                                           ${stage0(platform)}
-                                           ${stage0(hash)}" -].tar.bz2
-
-distfiles-append        ${stage0_name}:snap
-
-switch ${configure.build_arch} {
-    i386    {checksums-append   ${stage0_name} \
-                            rmd160  15a0ffbcee0def1a056d69aa851edf2b8ca490b6 \
-                            sha256  0cc20c5f3c808d6332bcc192b60d6a1e9ee313d481030d8d07ff42a831492ba2}
-    default {checksums-append   ${stage0_name} \
-                            rmd160  a5ef6ad68e6e49b40d045e45227ad858b0935988 \
-                            sha256  38076751be5a52a61285cced36879832a7a106d7ce0bfd2b2080c3cfc42de1ce}
-}
+                            rmd160  83a98c67a0aca97467d21150fa6a95fc77d10cc1 \
+                            sha256  ea6eb983daf2a073df57186a58f0d4ce0e85c711bec13c627a8c85d51b6a6d78
 
 # Only use compilers supported by upstream
 # (https://github.com/rust-lang/rust#building-from-source).
 compiler.blacklist  {clang < 211} \
                     *dragonegg* \
@@ -112,13 +87,12 @@ if {${configure.build_arch} eq "i386"} {
 # We need to use "--enable-rpath" as of a0546de, otherwise the build
 # produces improperly linked binaries.
 # (https://github.com/rust-lang/rust/issues/11747)
 # TODO: Build docs also, probably in a subport.
 configure.args      --disable-docs \
-                    --enable-local-rust \
                     --enable-rpath \
-                    --local-rust-root=${workpath}/${stage0(distdir)}
+                    --enable-clang
 
 build.type          gnu
 build.args          VERBOSE=1 \
                     CC=${configure.cc} \
                     CXX=${configure.cxx} \