# Override on the command line, for example
#   make Q=""
# would print on the console all the commands being run, instead of just their outputs
Q		:= @

# The role of echo is to print, so never print the command itsef
ECHO		:= @echo
LN		:= ${Q}ln -sf
MKDIR		:= ${Q}mkdir -p
MV		:= ${Q}mv

# Make sure that all files moved during this invokation of make get the same
# timestamp.
TS		:= $(shell date +%Y-%m-%d-T%H:%M:%S%z)

OHMYZSH_URL	:= https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh
VUNDLE_URL	:= https://github.com/gmarik/vundle.git

# Some things have to be done in varying ways depending on the OS
ARCH		:= $(shell uname -s)

# For GNU/Linux
ifeq (${ARCH},Linux)
ARCH_DEFINED	:= ok
HOSTNAME	:= $(shell hostname)
endif

# For MacOS X
ifeq (${ARCH},Darwin)
ARCH_DEFINED	:= ok
HOSTNAME	:= $(shell hostname -s)
endif

# For Windows
ifeq ($(word 2,$(subst -, ,$(subst _, ,${ARCH}))),NT)
ARCH_DEFINED	:= ok
HOSTNAME	:= $(shell hostname)
endif

ifneq (${ARCH_DEFINED},ok)
$(info )
$(info :: ERROR: Please add the necessary support or use one of:)
$(info ::        Linux, Mac OS X (Darwin), Windows.)
$(info )
$(error Unsupported architecture: $(ARCH))
else

.PHONY:
help:
	${ECHO} "help:\tShow this help"
	${ECHO} "all:\tSetup all the dot files in one go"
	${ECHO}
	${ECHO} "omz:\tInstall oh-my-zsh"
	${ECHO} "git:\tInstall GIT configuration files"
	${ECHO} "bash:\tInstall BASH configuration files"
	${ECHO} "zsh:\tInstall ZSH configuration files"
	${ECHO} "vim:\tInstall VIM configuration files"
	${ECHO} "tmux:\tInstall tmux configuration files"
	${ECHO} "x11:\tInstall X configuration files"
	${ECHO} "i3:\tInstall i3wm configuration files"
	${ECHO}

.PHONY:
all: sh bash zsh git vim x11 i3
	@# Prevent running the pattern rule

.PHONY:
git: config/git
	@# Prevent running the pattern rule
config/git: config/dir

.PHONY:
sh: profile
	@# Prevent running the pattern rule

.PHONY:
bash: profile bashrc bash_aliases bash_logout
	@# Prevent running the pattern rule

.PHONY:
zsh: profile zprofile zshrc oh-my-zsh/themes/sambuc.zsh-theme
	@# Prevent running the pattern rule
oh-my-zsh/themes/sambuc.zsh-theme: oh-my-zsh/themes/dir

.PHONY:
omz:
	${MV} "${HOME}/.oh-my-zsh" "${HOME}/.oh-my-zsh-${TS}" || true
	@curl -fsSL ${OHMYZSH_URL} > omz-setup.sh
	@sh omz-setup.sh --unattended

.PHONY:
vim: vim/bundle/vundle
	${ECHO}
	vim +BundleInstall +qall
	${ECHO}
	${ECHO} Do not forget to install and set a Nerdfont enhanced font.

vim/bundle/vundle: vim/bundle/dir vimrc vim/filetype.vim vim/syntax
	${MV} "${HOME}/.$@" "${HOME}/.$@-${TS}" || true
	git clone "${VUNDLE_URL}" "${HOME}/.$@"

vim/filetype.vim vim/syntax: .vim/dir

.PHONY:
tmux: config/tmux
	@# Prevent running the pattern rule
config/tmux: config/dir

.PHONY:
i3: config/i3 config/i3status.conf
	@# Prevent running the pattern rule
config/i3 config/i3status.conf: config/dir

.PHONY:
x11: Xdefaults xinitrc xsession
	@# Prevent running the pattern rule

%/dir:
	${MKDIR} "${HOME}/.$(shell dirname $@)"

%:
	@# Prevent generating link within links to folders
	${Q}[ -e ${HOME}/.$* ] && mv ${HOME}/.$* ${HOME}/.$*-${TS} || true
	${LN} $(shell pwd)/_$* ${HOME}/.$*
	${Q}[ -e ${HOSTNAME}.$* ] && ( [ -e ${HOME}/.host.$* ] && mv ${HOME}/.host.$* ${HOME}/.host.$*-${TS}; ln -s $(shell pwd)/${HOSTNAME}.$* ${HOME}/.host.$* ) || true

endif