Install PowerShell 7 on Ubuntu (23.04/22.04/20.04/18.04), Debian (12/11/10/9) Fedora/RHEL(8/7), Alpine, or macOS(Intel/M1)

install-pwsh.sh

#!/usr/bin/env bash

# Check if user is root
if [ "$(id -u)" -ne 0 ]; then
    echo "Please run as root"
    exit
fi

Use_Package_Manager=0
Help_Message=0

POSITIONAL=()
while (($# > 0)); do
    case "${1}" in
    -p | --package-manager)
        echo "Using package manager"
        Use_Package_Manager=1
        shift
        ;;
    -h | --help)
        echo "Usage:"
        echo " -p|--package-manager  Use the systems package manager."
        echo "                        When Microsoft's repo's are already"
        echo "                        added to the system's package manager."
        echo "                        Note: On macOS, this will attempt to"
        echo "                         install brew if not found."
        echo " -h|--help  Displays usage help info."
        Help_Message=1
        shift
        ;;
    *)
        echo "Usage:"
        echo " -p|--package-manager  Use the systems package manager."
        echo "                        When Microsoft's repo's are already"
        echo "                        added to the system's package manager."
        echo "                        Note: On macOS, this will attempt to"
        echo "                         install brew if not found."
        echo " -h|--help  Displays usage help info."
        Help_Message=1
        shift
        ;;
    esac
done

set -- "${POSITIONAL[@]}" # restore positional params

if ((Help_Message == 1)); then
    exit 0
fi

if ((Use_Package_Manager == 1)); then
    if [[ $OSTYPE == 'darwin'* ]]; then
        if [ "$(command -v brew)" ]; then
            echo "Command \"brew\" exists on system"
        else
            echo "Command \"brew\" does not exists on system, installing..."
            /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
        fi
        echo "Installing powershell via brew"
        brew install --cask powershell && exit 0 || exit 1
    else
        echo "Installing powershell via systems's package manager"
        if [[ $(which dnf) ]]; then
            echo "Using dnf"
            dnf install powershell
        elif [[ $(which yum) ]]; then
            echo "Using yum"
            yum install powershell
        elif [[ $(which apt) ]]; then
            echo "Using apt"
            apt -y install powershell
        fi
    fi
fi

download_latest_release() {
    if [[ $OSTYPE == 'darwin'* ]]; then
        if [[ $(uname -m) == 'arm64' ]]; then
            # M1
            PKG="powershell-*-osx-arm64.pkg"
        else
            # Intel
            PKG="powershell-*-osx-x64.pkg"
        fi
    else
        if [[ $(which apk) ]]; then
            PKG="powershell-*-linux-alpine-x64.tar.gz"
        else
            PKG="powershell-*-linux-x64.tar.gz"
        fi
    fi
    curl -s https://api.github.com/repos/PowerShell/PowerShell/releases/latest | grep "${PKG}" | cut -d : -f 2,3 | tr -d \" | wget -qi -
}

# Install pwsh
if [ "$(command -v pwsh)" ]; then
    echo "PowerShell already installed."
    exit 0
else
    if [[ $OSTYPE == 'darwin'* ]]; then
        # macOS
        download_latest_release
        xattr -rd com.apple.quarantine "$(ls powershell-*-osx-*.pkg)"
        installer -pkg "$(ls powershell-*-osx-*.pkg)" -target /
    else
        # Linux
        if [[ $(which yum) ]]; then
            majversion=$(lsb_release -rs | cut -f1 -d.)
            fedoraversion=$(rpm -q --queryformat '%{VERSION}\n' fedora-release)
            if [ "$majversion" -eq "7" ]; then
                yum install -y https://packages.microsoft.com/config/rhel/7/packages-microsoft-prod.rpm
            elif [ "$majversion" -eq "8" ]; then
                yum install -y https://packages.microsoft.com/config/rhel/8/packages-microsoft-prod.rpm
            elif [ "$fedoraversion" -ge "31" ]; then
                rpm --import https://packages.microsoft.com/keys/microsoft.asc
                curl https://packages.microsoft.com/config/rhel/7/prod.repo | sudo tee /etc/yum.repos.d/microsoft.repo
                dnf check-update
                dnf install compat-openssl10
                dnf install -y powershell
            fi
        elif [[ $(which apt) ]]; then
            if [ -f /etc/debian_version ]; then
                IFS='.' read -r -a VERSION </etc/debian_version
                v=${VERSION[0]}
                if [[ ${v} == 9 ]]; then
                    apt update -y
                    apt install -y curl gnupg apt-transport-https
                    wget https://packages.microsoft.com/config/debian/9/packages-microsoft-prod.deb || exit 1
                    curl https://packages.microsoft.com/keys/microsoft.asc | sudo apt-key add - || exit 1
                    sh -c 'echo "deb [arch=amd64] https://packages.microsoft.com/repos/microsoft-debian-stretch-prod stretch main" > /etc/apt/sources.list.d/microsoft.list'
                else
                    wget "https://packages.microsoft.com/config/debian/$v/packages-microsoft-prod.deb"
                    sudo dpkg -i packages-microsoft-prod.deb
                fi
                apt update -y
                apt install -y powershell
            else
                r=$(lsb_release -rs)
                apt update -y
                apt install -y wget apt-transport-https software-properties-common
                wget -q "https://packages.microsoft.com/config/ubuntu/$r/packages-microsoft-prod.deb" || exit 1
                dpkg -i packages-microsoft-prod.deb
                rm packages-microsoft-prod.deb
                apt update -y
                apt install -y powershell
            fi
        elif [[ $(which apk) ]]; then
            apk add --no-cache ca-certificates less ncurses-terminfo-base krb5-libs \
                libgcc libintl libssl1.1 libstdc++ tzdata userspace-rcu zlib icu-libs \
                curl
            apk -X https://dl-cdn.alpinelinux.org/alpine/edge/main add --no-cache lttng-ust
            cd /tmp/ || exit 1
            download_latest_release
            mkdir -p /opt/microsoft/powershell/7
            tar zxf "/tmp/$(ls -A1 powershell-*-linux-alpine-x64.tar.gz)" -C /opt/microsoft/powershell/7
            chmod +x /opt/microsoft/powershell/7/pwsh
            ln -s /opt/microsoft/powershell/7/pwsh /usr/bin/pwsh
        else
            echo "Unknown/Unsupported OS. Please install PowerShell before running this script."
            exit 1
        fi
    fi
fi