labgit-install.sh

#!/usr/bin/env bash
# labgit-install.sh
# Sets up labgit hooks and shell integration on a shared lab machine.
#
# Usage:
#   ./labgit-install.sh              # interactive
#   ./labgit-install.sh --global     # install hooks globally via core.hooksPath
#   ./labgit-install.sh /path/to/repo # install hooks into a specific repo

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
HOOKS_DIR="${SCRIPT_DIR}/hooks"

GREEN='\033[0;32m'
BOLD='\033[1m'
RESET='\033[0m'

info() { echo -e "${GREEN}${BOLD}labgit:${RESET} $*"; }

install_hooks_to() {
    local target="$1"
    mkdir -p "$target"
    for hook in pre-commit post-commit pre-push; do
        cp "${HOOKS_DIR}/${hook}" "${target}/${hook}"
        chmod +x "${target}/${hook}"
    done
    info "Hooks installed to ${target}"
}

# --- Parse arguments ---

if [[ "${1:-}" == "--global" ]]; then
    # Global hooks via core.hooksPath
    GLOBAL_HOOKS_DIR="${HOME}/.labgit/hooks"
    install_hooks_to "$GLOBAL_HOOKS_DIR"
    git config --global core.hooksPath "$GLOBAL_HOOKS_DIR"
    info "Global core.hooksPath set to ${GLOBAL_HOOKS_DIR}"
    info "All repos on this machine will now use labgit hooks."
    echo ""
    echo "Note: repos with their own .git/hooks will be overridden by the"
    echo "global hooksPath. To exempt a repo, run inside it:"
    echo "  git config --unset core.hooksPath"

elif [[ -n "${1:-}" ]]; then
    # Per-repo install
    REPO_DIR="$1"
    if [[ ! -d "${REPO_DIR}/.git" ]]; then
        echo "ERROR: ${REPO_DIR} is not a git repository."
        exit 1
    fi
    install_hooks_to "${REPO_DIR}/.git/hooks"

else
    # Interactive
    echo "labgit hook installer"
    echo ""
    echo "Options:"
    echo "  1) Global  -- all repos on this machine (sets core.hooksPath)"
    echo "  2) Per-repo -- install into a specific repo"
    echo ""
    read -rp "Choice [1/2]: " choice

    case "$choice" in
        1)
            GLOBAL_HOOKS_DIR="${HOME}/.labgit/hooks"
            install_hooks_to "$GLOBAL_HOOKS_DIR"
            git config --global core.hooksPath "$GLOBAL_HOOKS_DIR"
            info "Global core.hooksPath set to ${GLOBAL_HOOKS_DIR}"
            ;;
        2)
            read -rp "Path to repo: " repo_path
            if [[ ! -d "${repo_path}/.git" ]]; then
                echo "ERROR: ${repo_path} is not a git repository."
                exit 1
            fi
            install_hooks_to "${repo_path}/.git/hooks"
            ;;
        *)
            echo "Invalid choice."
            exit 1
            ;;
    esac
fi

echo ""
info "Done. Don't forget to source the shell integration in ~/.zshrc:"
echo "  source ${SCRIPT_DIR}/labgit-shell-integration.sh"