update build scripts to not expect default rust toolchain to be correct one

devops/git-hooks/pre-push

@@ -7,7 +7,7 @@ echo 'running clippy (rust linter)'
 # When custom build.rs triggers wasm-build-runner-impl to build we get error:
 # "Rust WASM toolchain not installed, please install it!"
 # So we skip building the WASM binary by setting BUILD_DUMMY_WASM_BINARY=1
-BUILD_DUMMY_WASM_BINARY=1 cargo clippy --release --all -- -D warnings
+BUILD_DUMMY_WASM_BINARY=1 cargo +nightly-2021-03-24 clippy --release --all -- -D warnings
 
 echo 'running cargo unit tests'
-cargo test --release --all
+cargo +nightly-2021-03-24 test --release --all

scripts/cargo-build.sh

@@ -2,4 +2,4 @@
 
 export WASM_BUILD_TOOLCHAIN=nightly-2021-03-24
 
-cargo build --release
+cargo +nightly-2021-03-24 build --release

scripts/cargo-tests-with-networking.sh

@@ -4,4 +4,4 @@ set -e
 export WASM_BUILD_TOOLCHAIN=nightly-2021-03-24
 
 echo 'running all cargo tests'
-cargo test --release --all -- --ignored
+cargo +nightly-2021-03-24 test --release --all -- --ignored

scripts/run-dev-chain.sh

@@ -3,11 +3,11 @@
 export WASM_BUILD_TOOLCHAIN=nightly-2021-03-24
 
 # Build release binary
-cargo build --release
+cargo +nightly-2021-03-24 build --release
 
 # Purge existing local chain
-yes | cargo run --release -- purge-chain --dev
+yes | cargo +nightly-2021-03-24 run --release -- purge-chain --dev
 
 # Run local development chain -
 # No need to specify `-p joystream-node` it is the default bin crate in the cargo workspace
-cargo run --release -- --dev
+cargo +nightly-2021-03-24 run --release -- --dev

setup.sh

@@ -15,7 +15,7 @@ elif [[ "$OSTYPE" == "darwin"* ]]; then
     fi
     # install additional packages
     brew update
-    brew install coreutils gnu-tar jq curl
+    brew install coreutils gnu-tar jq curl llvm || :
     echo "It is recommended to setup Docker desktop from: https://www.docker.com/products/docker-desktop"
 fi
 
@@ -28,8 +28,6 @@ source ~/.cargo/env
 rustup install nightly-2021-03-24
 rustup target add wasm32-unknown-unknown --toolchain nightly-2021-03-24
 
-rustup default nightly-2021-03-24
-
 rustup component add rustfmt clippy
 
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