#!/usr/bin/make -f
ifeq ($(XDG_CACHE_HOME),)
default: all; @:
%:
	. ~/.profile && $(MAKE) '$@'
else

SHELL = /bin/bash -o pipefail
GIT_DIR = ${HOME}/.git
STATEDIR = ${XDG_CACHE_HOME}/config

targets = \
	${GIT_DIR}/info/exclude \
	${STATEDIR}/symlinks.stamp \
	$(if $(shell crontab -l),${STATEDIR}/crontab.stamp) \
	$(if $(wildcard ${HOME}/Maildir),${HOME}/.folders) \
	$(if $(wildcard ${XDG_CONFIG_HOME}/dconf/user),${XDG_CONFIG_HOME}/dconf/user.txt)

all: $(targets)
clean:
	rm -f -- $(targets)
.PHONY: all clean

ifneq ($(wildcard ${HOME}/Maildir),)
MAILDIRS = .
-include ${STATEDIR}/maildirs.mk
${HOME}/.folders: $(addprefix ${HOME}/Maildir/,${MAILDIRS})
	find -L $< \( -false \
		-o -type f -name maildirfolder \
		-o -type d -name new \
		-o -type d -name tmp \
		-o -type d -name cur \
	\) -printf '%P\0' | xargs -r0 dirname -z -- | sort -zu | xargs -0 printf -- '.%s\n' > '$@'
${STATEDIR}/maildirs.mk: ${HOME}/.folders
	< $< sed -n 's/^\.//p' | xargs -d $$'\n' -r dirname -- | sort -u | xargs -d $$'\n' -r printf 'MAILDIRS += %s\n' > $@
endif

${GIT_DIR}/info/exclude: ${HOME}/.git.info.exclude.in $(shell echo .??*/)
	( cat $<; find $^ -type f -name 'CACHEDIR.TAG' -printf '%h\n'|sed 's@^\./@/@' ) > $@

${XDG_CONFIG_HOME}/dconf/user.txt: ${XDG_CONFIG_HOME}/dconf/user
	dconf dump / > $@

${STATEDIR}/crontab.stamp: ${XDG_CONFIG_HOME}/cron
	-(cat $^/*; echo) | crontab - 2>/dev/null
	mkdir -p '$(@D)'
	date > '$@'

${STATEDIR}/symlinks.stamp: ${XDG_CONFIG_HOME}/symlinks
	config-symlinks
	mkdir -p '$(@D)'
	date > '$@'

${HOME}/Maildir/%: | ${HOME}/Maildir
	mkdir -p '$@'/{cur,new,tmp}
	touch '$@'/maildirfolder

.DELETE_ON_ERROR:
.SECONDARY:
endif