install_environment.sh

#!/bin/bash

set -Eeuo pipefail
shopt -s lastpipe

function callstack() {
	local -i SKIP=${1-1}
	local -i i
	for i in $(seq $SKIP $((${#FUNCNAME[@]} - 1))); do
		if [[ ${BASH_SOURCE[$((i + 1))]+found} == "found" ]]; then
			echo "  $i: ${BASH_SOURCE[$((i + 1))]}:${BASH_LINENO[$i]} ${FUNCNAME[$i]}()"
		else
			echo "  $i: ${FUNCNAME[$i]}()"
		fi
	done
}
function _exit_handle() {
	RET=$?
	echo -ne "\e[0m"
	if [[ $RET -ne 0 ]]; then
		callstack 1
	fi
	exit $RET
}
trap _exit_handle EXIT

echo "starting installer...."

function die() {
	echo "" >&2
	echo -e "\e[38;5;9m$@\e[0m" >&2
	exit 1
}
function pad() {
	local i
	for ((i = 0; i < $1; i++)); do echo -n '  '; done
}

cd $(dirname ${BASH_SOURCE}) \
	|| die "internal error: can't get script folder"

export MY_SCRIPT_ROOT=$(pwd)
export _INSTALLING_=$(pwd)
export GEN_BIN_PATH="${MY_SCRIPT_ROOT}/.bin"
export PATH+=":${GEN_BIN_PATH}:${MY_SCRIPT_ROOT}/bin"
mkdir -p "${GEN_BIN_PATH}"
echo -e "installing scripts into \e[38;5;14m${MY_SCRIPT_ROOT}\e[0m."

if [[ -e /etc/profile.d/linux-toolbox.sh ]]; then
	rm -f /etc/profile.d/linux-toolbox.sh
fi
if [[ -e /etc/profile.d/01-linux-toolbox.sh ]]; then
	rm -f /etc/profile.d/01-linux-toolbox.sh
fi
if [[ -e /etc/profile.d/00-environment.sh ]]; then
	mv /etc/profile.d/00-environment.sh /etc/profile.d/50-environment.sh
fi

if touch /etc/profile.d/51-linux-toolbox.sh; then
	declare -r TARGET=/etc/profile.d/51-linux-toolbox.sh
	MY_LIBEXEC=/usr/local/libexec/linux-toolbox
	declare -xr SUDO=""
else
	declare -r TARGET=$GEN_BIN_PATH/.BASHPROFILE
	MY_LIBEXEC="$HOME/.local/lib/linux-toolbox"

	ENTRY_FILE="$HOME/.bashrc"
	file-section "$ENTRY_FILE" "MY LINUX TOOLBOX" "source '$TARGET'"
	declare -xr SUDO="sudo"
fi
function emit() {
	echo "$@" >>"${TARGET}"
}
function emit_stdin() {
	cat >>"${TARGET}"
}
function emit_file() {
	cat "${_INSTALLING_}/$1" >>"${TARGET}"
}
function emit_source() {
	local CMD=$1
	shift

	echo -n "source ${VAR_HERE}/$CMD.sh" >>"${TARGET}"
	if [[ $# -eq 0 ]]; then
		echo -n ' ""' >>"${TARGET}"
	else
		for i in "$@"; do
			echo -n " '$i'" >>"${TARGET}"
		done
	fi

	echo "" >>"${TARGET}"
}
SUDOLIST=()
function emit_alias_sudo() { # command line ...
	SUDOLIST+=("alias $1='sudo --preserve-env $@'")
}
function emit_alias_sudo2() { # command line ...
	local NAME=$1
	shift
	SUDOLIST+=("alias $NAME='sudo --preserve-env $@'")
}
function copy_bin_with_env() {
	local ENV="$1"
	local SRC="$2"
	local DST="${3-$(basename "$SRC")}"
	local F="${_INSTALLING_}/$SRC"
	local T="${GEN_BIN_PATH}/$DST"
	rm -f "$T"
	{
		head -n 1 "$F"
		echo
		echo "$ENV"
		echo
		tail -n +2 "$F"
	} >"$T"
	chmod a+x "$T"
}
function copy_bin() {
	local SRC="$1"
	local DST="${2-$(basename "$SRC")}"
	local F="${_INSTALLING_}/$SRC"
	local T="${GEN_BIN_PATH}/$DST"
	if [[ -e $T ]] && [[ "$(readlink "$T")" == "$F" ]]; then
		return
	fi
	rm -f "$T"
	# echo ln -s "${F}" "$T"
	ln -s "${F}" "$T"
	chmod a+x "$F"
}
function copy_libexec() {
	local F="${_INSTALLING_}/$1"
	local TN="${2-$(basename "${F}")}"
	local T="$MY_LIBEXEC/$TN"
	mkdir -p "$(dirname "$T")"
	cat "$F" >"$T"
	chmod a+x "$T"
	echo "$T"
}
function emit_path() {
	local PA="${MY_SCRIPT_ROOT}/$1"
	if [[ ! -e $PA ]]; then
		die "required folder not exists: ${PA}"
	fi

	chmod a+rx "$PA"

	local P="\$MY_SCRIPT_ROOT/$1"
	emit "path-var prepend \"${P}\""
	path-var prepend "${PA}"
}
function install_script() {
	local FOLDER="${1}"

	local PWD=$(pwd)
	echo -e "$(pad ${_INSTALL_LEVEL_-0})installing \e[38;5;11m.${PWD/"$MY_SCRIPT_ROOT"/}/${FOLDER}/${2-install}.sh\e[0m ..."

	pushd "${FOLDER}" >/dev/null \
		|| die "can't run install script: $(pwd)/${FOLDER}"
	local _INSTALLING_=$(pwd) HERE=$(pwd)
	local VAR_HERE="\$MY_SCRIPT_ROOT${HERE/"$MY_SCRIPT_ROOT"/}"

	# echo -e "\e[2mHERE=$HERE\e[0m"
	# echo -e "\e[2mVAR_HERE=$VAR_HERE\e[0m"

	local -i _INSTALL_LEVEL_="${_INSTALL_LEVEL_+$_INSTALL_LEVEL_} + 1"

	source "${_INSTALLING_}/${2-install}.sh"

	_INSTALL_LEVEL_="${_INSTALL_LEVEL_} - 1"

	echo -ne "$(pad ${_INSTALL_LEVEL_})${FOLDER}"
	[[ ${2+found} == found ]] && echo -n " -> $2"
	echo -e " - \e[38;5;10mOK!\e[0m"

	popd >/dev/null
	_INSTALLING_=$(pwd) HERE=$(pwd)
	VAR_HERE="\$MY_SCRIPT_ROOT${HERE/"$MY_SCRIPT_ROOT"/}"
}

### start
echo "create ${TARGET}"
[ -e "${TARGET}" ] && rm ${TARGET} || true

emit "MY_LIBEXEC=$MY_LIBEXEC"

echo ": common tools..."
install_script common

echo ": system-spec tools..."
install_script system

echo ": quick-alias..."
install_script quick-alias

echo ": bash source..."
install_script bash_source

echo ": applications..."
for FILE in "${MY_SCRIPT_ROOT}/applications/"*.sh; do
	install_script applications $(basename "$FILE" .sh)
done

echo ": user apps..."
install_script user

if [[ ${#SUDOLIST[@]} -gt 0 ]]; then
	emit "if ! is_root ; then"
	for L in "${SUDOLIST[@]}"; do
		emit $'\t'"$L"
	done
	emit "fi"
fi

echo ": ssh rc file..."
if [[ -e ~/.bashrc ]]; then
	sed -i "/LINUX_TOOLBOX_INITED/d" ~/.bashrc
fi
install_script rc

echo -n "complete, try start it - "

# shellcheck source=01-linux-toolbox.sh
source "${TARGET}" \
	|| {
		unlink "${TARGET}"
		die "can't start scripts, install failed."
	}

if command_exists shfmt; then
	shfmt -s -ln=bash -bn -w "$TARGET" "$TARGET"
fi

echo "ok."