install.sh

#!/usr/bin/env bash

: <<'EOF'
Installs git_auto_pull.sh and registers it to run every 30 minutes:
	- macOS:  launchd agent  (~/Library/LaunchAgents)
	- Linux:  systemd --user timer (~/.config/systemd/user)

Safe to re-run: copies are overwritten and the scheduler is
reloaded/re-enabled rather than duplicated.

Pass --uninstall to remove the symlink and scheduler registration.
EOF

set -euo pipefail

BIN_DIR="$HOME/.local/bin"
SCRIPT_NAME="git_auto_pull.sh"
LABEL="com.pythoninthegrass.git-auto-pull"
RAW_BASE="https://raw.githubusercontent.com/pythoninthegrass/git_auto_pull/main"

SCRIPT_SOURCE="${BASH_SOURCE[0]:-}"
FROM_LOCAL_CHECKOUT=1

if [ -n "$SCRIPT_SOURCE" ] && [ -f "$SCRIPT_SOURCE" ]; then
	SCRIPT_DIR="$(cd "$(dirname "$SCRIPT_SOURCE")" && pwd)"
else
	# Running via `curl | bash`: no local file, so fetch the files
	# install.sh expects to sit alongside into a temp dir.
	FROM_LOCAL_CHECKOUT=0
	SCRIPT_DIR="$(mktemp -d)"
	trap 'rm -rf "$SCRIPT_DIR"' EXIT

	for f in "$SCRIPT_NAME" "${LABEL}.plist" git-auto-pull.service git-auto-pull.timer; do
		curl -fsSL "${RAW_BASE}/${f}" -o "${SCRIPT_DIR}/${f}"
	done
fi

install_script() {
	mkdir -p "$BIN_DIR"
	chmod +x "${SCRIPT_DIR}/${SCRIPT_NAME}"

	if [ "$FROM_LOCAL_CHECKOUT" -eq 1 ]; then
		# Symlink to the checkout so `git pull` there keeps the installed script current.
		ln -sf "${SCRIPT_DIR}/${SCRIPT_NAME}" "${BIN_DIR}/${SCRIPT_NAME}"
	else
		# SCRIPT_DIR is a temp dir that gets removed on exit; copy instead of symlinking.
		# rm first: cp -f won't write through a dangling symlink left by a prior run.
		rm -f "${BIN_DIR}/${SCRIPT_NAME}"
		cp -f "${SCRIPT_DIR}/${SCRIPT_NAME}" "${BIN_DIR}/${SCRIPT_NAME}"
	fi
}

uninstall() {
	case "$1" in
	Darwin)
		agents_dir="${HOME}/Library/LaunchAgents"
		plist_dest="${agents_dir}/${LABEL}.plist"
		uid="$(id -u)"

		launchctl bootout "gui/${uid}" "$plist_dest" >/dev/null 2>&1 || true
		rm -f "$plist_dest"

		echo "Removed launchd agent: $plist_dest"
		;;
	Linux)
		systemd_dir="${HOME}/.config/systemd/user"

		systemctl --user disable --now git-auto-pull.timer >/dev/null 2>&1 || true
		rm -f "${systemd_dir}/git-auto-pull.service" "${systemd_dir}/git-auto-pull.timer"
		systemctl --user daemon-reload

		echo "Removed systemd user timer: ${systemd_dir}/git-auto-pull.timer"
		;;
	*)
		echo "Unsupported OS: $1" >&2
		exit 1
		;;
	esac

	rm -f "${BIN_DIR}/${SCRIPT_NAME}"
	echo "Removed script symlink: ${BIN_DIR}/${SCRIPT_NAME}"
}

install() {
	case "$1" in
	Darwin)
		agents_dir="${HOME}/Library/LaunchAgents"
		plist_dest="${agents_dir}/${LABEL}.plist"
		uid="$(id -u)"

		mkdir -p "$agents_dir"

		# Template ships with /Users/lance hardcoded; retarget to this $HOME.
		sed "s|/Users/lance|${HOME}|g" "${SCRIPT_DIR}/${LABEL}.plist" >"$plist_dest"

		launchctl bootout "gui/${uid}" "$plist_dest" >/dev/null 2>&1 || true
		launchctl bootstrap "gui/${uid}" "$plist_dest"
		launchctl enable "gui/${uid}/${LABEL}"

		echo "Installed launchd agent: $plist_dest"
		;;
	Linux)
		systemd_dir="${HOME}/.config/systemd/user"
		mkdir -p "$systemd_dir"

		cp -f "${SCRIPT_DIR}/git-auto-pull.service" "${systemd_dir}/git-auto-pull.service"
		cp -f "${SCRIPT_DIR}/git-auto-pull.timer" "${systemd_dir}/git-auto-pull.timer"

		systemctl --user daemon-reload
		systemctl --user enable --now git-auto-pull.timer

		echo "Installed systemd user timer: ${systemd_dir}/git-auto-pull.timer"
		;;
	*)
		echo "Unsupported OS: $1" >&2
		exit 1
		;;
	esac
}

main() {
	if [ "${1:-}" = "--uninstall" ]; then
		uninstall "$(uname -s)"
		return
	fi

	install_script
	echo "Installed script: ${BIN_DIR}/${SCRIPT_NAME}"
	install "$(uname -s)"
}

main "$@"