Makefile for dotfiles

Makefile

HOSTNAME = $(shell hostname -s)
PWD = $(shell pwd)
LN = ln
LN_FLAGS = -sf

INPUT = $(shell find $(PWD) -path $(PWD)/.git -prune -o -name "*.symlink" -print | grep -v host-specific)
INPUT += $(shell find $(PWD) -name "*.symlink" -print | grep host-specific/$(HOSTNAME))
OUTPUT = $(addprefix ~/.,$(basename $(notdir $(INPUT))))

help:
	@echo "This script is used to install and remove dotfile."
	@echo "The available targets are:"
	@echo " help - Display this help information"
	@echo " install - Link your dotfiles"
	@echo " uninstall - Unlink your dotfiles"

install: $(OUTPUT)

uninstall:
	@rm $(OUTPUT)
	@for target in $(OUTPUT); do \
		if [ -e $$target.backup ]; then \
			mv $$target.backup $$target; \
		fi; \
	done

~/.%: .git/FETCH_HEAD
	@if [ -e $@ ]; then \
		dest=`readlink $@`; \
		if [ "$$dest" != "$(filter %/$*.symlink, $(INPUT))" ]; then \
			mv $@ $@.backup; \
		fi; \
	fi
	@$(LN) $(LN_FLAGS) $(filter %/$*.symlink, $(INPUT)) $@

.PHONY: install uninstall help