samhuri.net/bin/bootstrap

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#!/bin/bash
# bail on errors and unset variables
set -euo pipefail
SWIFT_VERSION=5.1.3
SWIFT_DIR=swift-$SWIFT_VERSION-RELEASE/swift-$SWIFT_VERSION-RELEASE-ubuntu18.04
SWIFT_FILENAME=$SWIFT_DIR.tar.gz
if [[ $(uname) = "Linux" ]]; then
if which swiftc >/dev/null 2>/dev/null; then
echo "*** swift is installed: $(swift --version)"
else
echo "*** installing swift"
pushd $HOME
wget https://swift.org/builds/swift-$SWIFT_VERSION-release/ubuntu1804/$SWIFT_FILENAME
tar xzf $SWIFT_FILENAME
echo "export PATH=\"\$HOME/$SWIFT_DIR/usr/bin:\$PATH\"" >> $HOME/.bashrc
popd
fi
fi
echo "*** done"