shell/git.sh at master · chteau/shell · GitHub

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#!/bin/sh
# Git bootstrapper
# https://git-scm.com/

APP_NAME="Git"

OS=$(uname -s)
ARCH=$(uname -m)

# --- Detect distro (Linux only) ---
detect_distro() {
    DISTRO=""
    if [ -f /etc/os-release ]; then
        . /etc/os-release
        case "$ID $ID_LIKE" in
            *arch*)              DISTRO="arch" ;;
            *debian*|*ubuntu*)   DISTRO="debian" ;;
            *fedora*|*rhel*|*centos*) DISTRO="fedora" ;;
        esac
    fi
    if [ -z "$DISTRO" ]; then
        command -v pacman >/dev/null 2>&1 && DISTRO="arch"
        command -v dpkg   >/dev/null 2>&1 && DISTRO="debian"
        command -v rpm    >/dev/null 2>&1 && DISTRO="fedora"
    fi
}

set -e

case "$OS" in
    Darwin)
        if command -v brew >/dev/null 2>&1; then
            echo "Installing ${APP_NAME} via Homebrew..."
            brew install git
        elif command -v port >/dev/null 2>&1; then
            echo "Installing ${APP_NAME} via MacPorts..."
            sudo port install git
        else
            # Xcode Command Line Tools include git — no package manager needed
            echo "Installing ${APP_NAME} via Xcode Command Line Tools..."
            xcode-select --install
            echo "Follow the prompt to complete installation."
            exit 0
        fi
        echo "Done! $(git --version)"
        ;;

    Linux)
        detect_distro
        case "$DISTRO" in
            debian) sudo apt-get install -y git ;;
            fedora) sudo dnf install -y git ;;
            arch)   sudo pacman -Syu --noconfirm git ;;
            *)
                echo "Error: unsupported distro. Install git manually from https://git-scm.com/" >&2
                exit 1
                ;;
        esac
        echo "Done! $(git --version)"
        ;;

    MINGW*|CYGWIN*|MSYS*)
        if command -v winget.exe >/dev/null 2>&1; then
            echo "Installing ${APP_NAME} via winget..."
            set +e
            winget.exe install --id Git.Git -e --source winget
            EC=$?
            set -e
            [ "$EC" = "0" ] || [ "$EC" = "43" ] || exit "$EC"
            echo "Done! Restart your terminal for PATH changes to apply."
        else
            echo "Fetching latest Git for Windows release..."
            API_JSON=$(curl -fsSL "https://api.github.com/repos/git-for-windows/git/releases/latest")
            TAG=$(echo "$API_JSON" | grep '"tag_name"' | sed 's/.*"tag_name": *"\([^"]*\)".*/\1/')
            VERSION=$(echo "$TAG" | sed 's/^v//;s/\.windows\.[0-9]*//')
            case "$ARCH" in
                arm64) FILENAME="Git-${VERSION}-arm64.exe" ;;
                *)     FILENAME="Git-${VERSION}-64-bit.exe" ;;
            esac
            DOWNLOAD_URL="https://github.com/git-for-windows/git/releases/download/${TAG}/${FILENAME}"
            echo "Downloading: ${DOWNLOAD_URL}"
            DEST="${TEMP}/GitInstaller.exe"
            curl -fSL -o "$DEST" "$DOWNLOAD_URL"
            echo "Launching installer..."
            cmd.exe /c start "" "$DEST"
        fi
        ;;

    *)
        echo "Error: unsupported OS: $OS" >&2
        exit 1
        ;;
esac