Bash script to install Swift 5.9 on Ubuntu 22.04

install-swift.sh

#!/bin/bash

if [ -f "/opt/swift/bin/swift" ]; then
  echo ====== Swift is already installed at /opt/swift, exiting!
  exit 1
fi

for i in "$@"
do
case $i in
    -s|--skip-signature)
    SKIP_SIGNATURE_CHECK=YES
    shift
    ;;
    *)
    ;;
esac
done

echo ====== Installing dependencies...

export DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true

apt-get -qq update

apt-get -qq install \
          binutils \
          git \
          gnupg2 \
          libc6-dev \
          libcurl4-openssl-dev \
          libedit2 \
          libgcc-9-dev \
          libpython3.8 \
          libsqlite3-0 \
          libstdc++-9-dev \
          libxml2-dev \
          libz3-dev \
          pkg-config \
          tzdata \
          unzip \
          zlib1g-dev \
          curl

# pub   4096R/ED3D1561 2019-03-22 [expires: 2021-03-21]
#       Key fingerprint = A62A E125 BBBF BB96 A6E0  42EC 925C C1CC ED3D 1561
# uid                  Swift 5.x Release Signing Key <swift-infrastructure@swift.org
SWIFT_SIGNING_KEY=A62AE125BBBFBB96A6E042EC925CC1CCED3D1561
SWIFT_PLATFORM=ubuntu22.04
SWIFT_BRANCH=swift-5.9-release
SWIFT_VERSION=swift-5.9-RELEASE
SWIFT_WEBROOT=https://swift.org/builds/

set -e
SWIFT_WEBDIR="$SWIFT_WEBROOT/$SWIFT_BRANCH/$(echo $SWIFT_PLATFORM | tr -d .)/"
SWIFT_BIN_URL="$SWIFT_WEBDIR/$SWIFT_VERSION/$SWIFT_VERSION-$SWIFT_PLATFORM.tar.gz"
SWIFT_SIG_URL="$SWIFT_BIN_URL.sig"
export GNUPGHOME="$(mktemp -d)"

echo ====== Downloading toolchain...

curl -#fSL "$SWIFT_BIN_URL" -o swift.tar.gz "$SWIFT_SIG_URL" -o swift.tar.gz.sig

if [ -n "$SKIP_SIGNATURE_CHECK" ]
then
    echo ====== Skipped signature check!
else
    echo ====== Verifying signature...

    gpg --keyserver hkp://keyserver.ubuntu.com \
      --recv-keys \
      '7463 A81A 4B2E EA1B 551F  FBCF D441 C977 412B 37AD' \
      '1BE1 E29A 084C B305 F397  D62A 9F59 7F4D 21A5 6D5F' \
      'A3BA FD35 56A5 9079 C068  94BD 63BC 1CFE 91D3 06C6' \
      '5E4D F843 FB06 5D7F 7E24  FBA2 EF54 30F0 71E1 B235' \
      '8513 444E 2DA3 6B7C 1659  AF4D 7638 F1FB 2B2B 08C4' \
      'A62A E125 BBBF BB96 A6E0  42EC 925C C1CC ED3D 1561' \
      '8A74 9566 2C3C D4AE 18D9  5637 FAF6 989E 1BC1 6FEA' \
      'E813 C892 820A 6FA1 3755  B268 F167 DF1A CF9C E069'

    gpg --keyserver hkp://keyserver.ubuntu.com --refresh-keys Swift

    gpg --batch --verify swift.tar.gz.sig swift.tar.gz
fi

echo ====== Unpacking toolchain to /opt/swift...

sudo mkdir -p /opt/swift
sudo tar -xzf swift.tar.gz --directory /opt/swift --strip-components=2
sudo chmod -R o+r /opt/swift/lib/swift

echo ====== Cleaning up...

rm -rf "$GNUPGHOME" swift.tar.gz.sig swift.tar.gz

echo ====== Done.

/opt/swift/bin/swift --version