runner-images/images/linux/scripts/installers/swift.sh

#!/bin/bash
################################################################################
##  File:  swift.sh
##  Desc:  Installs Swift
################################################################################

# Source the helpers for use with the script
source $HELPER_SCRIPTS/document.sh

# Install
image_label="$(lsb_release -rs)"
swift_version=$(curl -s https://swift.org/download/ | grep -m1 "id=\"swift-" | awk -F"[ <]" '{print $4}')

wget -P /tmp https://swift.org/builds/swift-$swift_version-release/ubuntu${image_label//./}/swift-$swift_version-RELEASE/swift-$swift_version-RELEASE-ubuntu$image_label.tar.gz
tar xzf /tmp/swift-$swift_version-RELEASE-ubuntu$image_label.tar.gz
mv swift-$swift_version-RELEASE-ubuntu$image_label /usr/share/swift

SWIFT_PATH="/usr/share/swift/usr/bin"
SWIFT_BIN="$SWIFT_PATH/swift"
ln -s "$SWIFT_BIN" /usr/local/bin/swift
echo "SWIFT_PATH=$SWIFT_PATH" | tee -a /etc/environment

# Run tests to determine that the software installed as expected
echo "Testing to make sure that script performed as expected, and basic scenarios work"
if ! command -v swift; then
    echo "Swift was not installed"
    exit 1
fi

# Document what was added to the image
echo "Lastly, documenting what we added to the metadata file"
DocumentInstalledItem "$(swift --version)"