get_rust_nightly.sh

#!/bin/sh -x

TARGET_TUPLE='x86_64-apple-darwin'

RUST_TARBALL="rust-nightly-${TARGET_TUPLE}.tar.gz"
CARGO_TARBALL="cargo-nightly-${TARGET_TUPLE}.tar.gz"

(cd /tmp; curl -O --retry 3 \
  "http://static.rust-lang.org/{dist/${RUST_TARBALL},cargo-dist/${CARGO_TARBALL}}")

CHECKSUM=$(openssl sha1 /tmp/${RUST_TARBALL} | cut -d ' ' -f2)

cd ~/Library/Local/Rust

OUTPUT=${PWD}/versions/${CHECKSUM}/
test -d ${OUTPUT} \
  && {
  exit 1;
} || {
  mkdir ${OUTPUT};
  tar xvf /tmp/${RUST_TARBALL} -C ${OUTPUT}/;
  tar xvf /tmp/${CARGO_TARBALL} -C ${OUTPUT}/;
  unlink ./current-rust
  unlink ./current-cargo
  ln -s ${OUTPUT}/$(basename ${RUST_TARBALL} .tar.gz) ./current-rust
  ln -s ${OUTPUT}/$(basename ${CARGO_TARBALL} .tar.gz) ./current-cargo
  exit 0;
}