install-profile

#!/usr/bin/env bash

set -e

BASE_CONFIG="base"
CONFIG_SUFFIX=".yaml"

META_DIR="meta"
CONFIG_DIR="ingredients"
PROFILES_DIR="recipes"

DOTBOT_DIR="dotbot"
DOTBOT_BIN="bin/dotbot"

BASE_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

cd "${BASE_DIR}"

LOCK_FILE="${BASE_DIR}/.dotbot-profile"
REQUESTED="$1"

if [[ -f "$LOCK_FILE" ]]; then
	LOCKED="$(cat "$LOCK_FILE")"
	if [[ -z "$LOCKED" ]]; then
		echo "Error: lock file is empty or corrupt." >&2
		echo "To switch profiles, run: rm ${LOCK_FILE}" >&2
		exit 1
	fi
	RECIPE_FILE="${BASE_DIR}/${META_DIR}/${PROFILES_DIR}/${LOCKED}"
	if [[ ! -f "$RECIPE_FILE" ]]; then
		echo "Error: locked profile '$LOCKED' no longer exists in ${META_DIR}/${PROFILES_DIR}/." >&2
		echo "To switch profiles, run: rm ${LOCK_FILE}" >&2
		exit 1
	fi
	if [[ "$LOCKED" != "$REQUESTED" ]]; then
		echo "Error: this machine is locked to profile '$LOCKED'." >&2
		echo "Refusing to install profile '$REQUESTED'." >&2
		echo "To switch profiles, run: rm ${LOCK_FILE}" >&2
		exit 1
	fi
fi

git -C "${BASE_DIR}" submodule sync --quiet
git submodule update --init "${BASE_DIR}"

CONFIGS=()
while IFS= read -r config; do
	CONFIGS+=("$config")
done <"${META_DIR}/${PROFILES_DIR}/$1"

shift

for config in "${CONFIGS[@]}" "$@"; do
	echo -e "\nConfigure $config"
	# create temporary file
	configFile="$(mktemp)"
	suffix="-sudo"
	{
		cat "${BASE_DIR}/${META_DIR}/${BASE_CONFIG}${CONFIG_SUFFIX}"
		printf '\n'
		cat "${BASE_DIR}/${META_DIR}/${CONFIG_DIR}/${config%"$suffix"}${CONFIG_SUFFIX}"
	} >"$configFile"

	cmd=("${BASE_DIR}/${META_DIR}/${DOTBOT_DIR}/${DOTBOT_BIN}" -d "${BASE_DIR}" -c "$configFile")

	if [[ $config == *"sudo"* ]]; then
		cmd=(sudo "${cmd[@]}")
	fi

	"${cmd[@]}"
	rm -f "$configFile"
done

echo "$REQUESTED" > "$LOCK_FILE"

# Record which commit this machine has actually applied. A bare `git pull`
# moves HEAD without running a single dotbot step, so "git is clean" and
# "the machine is converged" are different facts -- `dot status` and the
# post-merge hook compare this stamp against HEAD to tell them apart.
# Written last on purpose: `set -e` aborts before it on a failed step, and a
# partial apply must not count as converged.
STAMP_DIR="${XDG_CACHE_HOME:-$HOME/.cache}"
mkdir -p "${STAMP_DIR}"
printf '%s %s\n' "$(git -C "${BASE_DIR}" rev-parse HEAD)" "$REQUESTED" >"${STAMP_DIR}/dot-profile-applied"

cd "${BASE_DIR}"