rustup cargo install-upgrade

.travis.yml

@@ -12,7 +12,7 @@ cache:
   directories:
     - $HOME/.cargo
 before_cache:
-  - cargo install -Z install-upgrade cargo-cache --debug
+  - cargo install cargo-cache --debug
   - find $HOME/.cargo/bin/ ! -type d -exec strip {} \;
   - cargo cache --autoclean
 
@@ -28,7 +28,7 @@ install:
   - |
     if [[ -z ${INTEGRATION} ]]; then
       if ! rustup component add rustfmt; then
-        cargo install -Z install-upgrade --git https://github.com/rust-lang/rustfmt --bin rustfmt
+        cargo install --git https://github.com/rust-lang/rustfmt --bin rustfmt
       fi
       if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
         . $HOME/.nvm/nvm.sh

appveyor.yml

@@ -18,7 +18,7 @@ cache:
   - '%USERPROFILE%\.cargo'
 # before cache
 after_test:
-  - cargo install -Z install-upgrade cargo-cache --debug
+  - cargo install cargo-cache --debug
   - cargo cache --autoclean
 
 install:
@@ -27,7 +27,7 @@ install:
   - set PATH=%USERPROFILE%\.cargo\bin;%PATH%
   - rustup component add rustfmt --toolchain nightly & exit 0 # Format test handles missing rustfmt
   - del rust-toolchain
-  - cargo install -Z install-upgrade rustup-toolchain-install-master
+  - cargo install rustup-toolchain-install-master
   - rustup-toolchain-install-master -f -n master -c rustc-dev
   - rustup override set master
   - rustc -V

setup-toolchain.sh

@@ -5,14 +5,13 @@ set -e
 
 cd "$(dirname "$0")"
 
-ERRNO=0
-RTIM_PATH=$(command -v rustup-toolchain-install-master) || ERRNO=$?
+RTIM_PATH=$(command -v rustup-toolchain-install-master)
 CARGO_HOME=${CARGO_HOME:-$HOME/.cargo}
 
 # Check if people also install RTIM in other locations beside
 # ~/.cargo/bin
-if [[ "$ERRNO" -ne 0 ]] || [[ "$RTIM_PATH" == $CARGO_HOME/bin/rustup-toolchain-install-master ]]; then
-    cargo install -Z install-upgrade rustup-toolchain-install-master
+if [[ "$RTIM_PATH" == $CARGO_HOME/bin/rustup-toolchain-install-master ]]; then
+    cargo +nightly install rustup-toolchain-install-master
 else
     VERSION=$(rustup-toolchain-install-master -V | grep -o "[0-9.]*")
     REMOTE=$(cargo search rustup-toolchain-install-master | grep -o "[0-9.]*")