chore(rust): Install rust via rustup

projects/rust-lang.org/package.yml

@@ -31,50 +31,26 @@ options:
 
 dependencies:
   tea.xyz/gx/cc: c99
-  #FIXME ^^ strictly rustc only needs a linker
-  zlib.net: 1
+
+runtime:
+  env:
+    RUST_SRC_PATH: ${{prefix}}/lib/rustlib/src/rust/src
 
 build:
   dependencies:
-    tea.xyz/gx/make: '*'  #FIXME surely we don’t need make AND ninja
-    cmake.org: ^3.20
-    ninja-build.org: ^1.10
-    python.org: 3
-    openssl.org: '*' # needed to build openssl-sys
-    freedesktop.org/pkg-config: ^0.29
-    crates.io/semverator: 0
+    rust-lang.org/rustup: '*'
   script: |-
-    # --enable-optimize not available as of 1.63.0
-    if semverator satisfies '<1.63' {{ version }}; then
-      export ARGS="$ARGS --enable-optimize"
-    fi
-
-    # 1.68.0 introduced a regression w.r.t. CI builds
-    # https://github.com/rust-lang/rust/issues/108959
-    if semverator satisfies '>=1.68<1.70' {{ version }}; then
-      sed -i.bak -e 's/CiEnv::is_ci()/CiEnv::is_ci() \&\& config.rust_info.is_managed_git_subrepository()/' src/bootstrap/native.rs
-      rm src/bootstrap/native.rs.bak
-    fi
-
-    ./configure $ARGS
-    make install
-
-    for tool in $tools; do
-      ./x.py install $tool
-    done
-
+    rustup default {{ version }}
+    rustup component add rust-analyzer
+    # used for type checking in IDEs
+    rustup component add rust-src
+
+    # copy installation
+    mkdir -p {{ prefix }}
+    cp -r ~/.rustup/toolchains/*/* {{prefix}}
+
+    # do cleanup
     rm -rf {{prefix}}/share/doc
-  env:
-    ARGS:
-      - --enable-vendor
-      - --prefix={{ prefix }}
-      - --enable-ninja
-      - --disable-docs  # docs are online
-      - --tools=clippy,rustfmt,analysis
-    tools:
-      - clippy
-      - rustfmt
-      - rust-analyzer
 
 test:
   script: |