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+ #! /usr/bin/env bash
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+ # Set up the appropriate rustc toolchain
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+
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+ set -e
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+
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+ cd " $( dirname " $0 " ) "
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+
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+ RTIM_PATH=$( command -v rustup-toolchain-install-master) || INSTALLED=false
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+ CARGO_HOME=${CARGO_HOME:- $HOME / .cargo}
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+
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+ # Check if RTIM is not installed or installed in other locations not in ~/.cargo/bin
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+ if [[ " $INSTALLED " == false || " $RTIM_PATH " == $CARGO_HOME /bin/rustup-toolchain-install-master ]]; then
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+ cargo install rustup-toolchain-install-master
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+ else
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+ VERSION=$( rustup-toolchain-install-master -V | grep -o " [0-9.]*" )
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+ REMOTE=$( cargo search rustup-toolchain-install-master | grep -o " [0-9.]*" )
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+ echo " info: skipping updating rustup-toolchain-install-master at $RTIM_PATH "
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+ echo " current version : $VERSION "
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+ echo " remote version : $REMOTE "
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+ fi
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+
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+ RUST_COMMIT=$( git ls-remote https://github.com/rust-lang/rust master | awk ' {print $1}' )
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+
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+ if rustc +master -Vv 2> /dev/null | grep -q " $RUST_COMMIT " ; then
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+ echo " info: master toolchain is up-to-date"
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+ exit 0
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+ fi
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+
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+ if [[ -n " $HOST_TOOLCHAIN " ]]; then
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+ TOOLCHAIN=(' --host' " $HOST_TOOLCHAIN " )
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+ else
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+ TOOLCHAIN=()
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+ fi
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+
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+ rustup-toolchain-install-master -f -n master " ${TOOLCHAIN[@]} " -c rustc-dev -c llvm-tools -- " $RUST_COMMIT "
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+ rustup override set master
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+
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