## -*-makefile-*-

all::
.SECONDEXPANSION: #sorry

###--------------------------------------------------------------------------
### Utilities.

##
quote			 = '$(subst ','\'',$1)'#'

## Suss out how to print stuff.
print			 = printf "%s" $(call quote,$1)

## Looking configuration things up.
mdw-conf		 = $(shell bin/mdw-conf "$1" "$2")

## Checking symlink targets.
symlink-ok-p		 = $(shell \
	case $$(readlink 2>/dev/null $1) in ($2) echo t ;; esac)

## Silent rules machinery.
V			 = 0
V_AT			 = $(V_AT_$V)
V_AT_0			 = @
v_print			 = $(call v_print_$V,$1,$2)
v_print_0		 = \
	printf "  %-8s %s\n" "$1" $(call quote,$(patsubst $(HOME)/%,~/%,$2));
v_tag			 = $(V_AT)$(call v_print_$V,$1,$@)

## Hack.
relax			 =

###--------------------------------------------------------------------------
### Configuration.

## Figure out where I am.
HERE			:= $(shell pwd)

## Decide on how to fetch things from URLs.
ifeq ($(shell (curl >/dev/null 2>&1 --version || [ $$? -eq 2 ]) && echo t),t)
  get-url		 = curl -fs -o $1 $2
else
  get-url		 = wget -q -O $1 $2
endif

## Which Emacs should I use?
EMACS			:= $(shell \
	emacs=nil; \
	for i in emacs24 emacs23 emacs22 emacs21 emacs; do \
	  if type >/dev/null 2>&1 $$i; then emacs=$$i; break; fi; \
	done; \
	echo $$emacs)

## Whence to obtain externally hosted stuff.
REPO			 = https://ftp.distorted.org.uk/u/mdw/profile

## Additional local configuration.
-include local.mk

###--------------------------------------------------------------------------
### Some utility rules.

_force:
.PHONY: _force

###--------------------------------------------------------------------------
### Emacs.

ifneq ($(EMACS),nil)

EMACSLIB		 = $(HOME)/lib/emacs

EMACS_VERSION		:= $(shell $(EMACS) 2>&1 -Q --batch --eval \
	'(message "%s %s" emacs-major-version emacs-minor-version)' | \
	tail -n1)
emacs-version-p		 = $(shell set -- $(EMACS_VERSION); \
	if [ $$1 -gt $1 ] || ([ $$1 -eq $1 ] && [ $$2 -ge $2 ]); then \
	  echo t; \
	fi)

ELISP			+= make-regexp ew-hols
ELISP			+= mdw-gnus-patch
ELISP			+= mdw-multiple-cursors
ELISP			+= git git-blame vc-git stgit quilt

ifeq ($(call emacs-version-p,24,3),t)
ELISP			+= bracketed-paste
endif

ELISP			+= dot-emacs
dot-emacs_DEPS		 = make-regexp

SCRIPTLINKS		+= emacsclient-hack movemail-hack sendmail-hack
SCRIPTLINKS		+= aspell-hack emerge-hack

%.elc: %.el $$(foreach e, $$($$*_DEPS), $$(DEP_$$e))
	$(call v_tag,EMACS)if ! $(EMACS) >$*.build-log 2>&1 \
		-L el/ -L $(EMACSLIB) \
		--batch --no-site-file \
		--eval '(byte-compile-file "$<")'; then \
	  cat $*.build-log; exit 2; \
	fi

LOCAL_ELISP		 = $(filter $(notdir $(wildcard el/*.el)), \
				$(addsuffix .el, $(ELISP)))
$(foreach e, $(LOCAL_ELISP), \
	$(eval DEP_$(basename $e) = $(EMACSLIB)/$(e:.el=.elc)))
$(addprefix $(EMACSLIB)/, $(LOCAL_ELISP)): $(EMACSLIB)/%: el/%
	$(call v_tag,SYMINK)mkdir -p $(EMACSLIB) && \
		rm -f $@.new && \
		ln -s $(HERE)/$< $@.new && \
		mv $@.new $@

REMOTE_ELISP		 = $(filter-out $(notdir $(wildcard el/*.el)), \
				$(addsuffix .el, $(ELISP)))
$(foreach e, $(REMOTE_ELISP), \
	$(eval DEP_$(basename $e) = $(if $(shell \
		if $(EMACS) >/dev/null 2>&1 --no-site-file -q --batch \
			--eval ' \
			  (progn \
			    (kill-emacs (condition-case nil \
					    (progn (load-library "$e") 0) \
					  (error 1))))'; then \
		  echo t; \
		fi),, $(EMACSLIB)/$(e:.el=.elc))))
$(addprefix $(EMACSLIB)/, $(REMOTE_ELISP)): $(EMACSLIB)/%:
	$(call v_tag,FETCH)mkdir -p $(EMACSLIB) && \
		$(call get-url,$@.new,$(REPO)/$*) && \
		mv $@.new $@

DOTLINKS		+= .emacs .emacs-calc .vm .gnus.el .ercrc.el

all:: $(foreach e, $(ELISP), $(DEP_$e))
$(foreach e, $(ELISP), $(eval _emacs.$e: $(EMACSLIB)/$e.elc))

endif

###--------------------------------------------------------------------------
### Other simpler things.

$(HOME)/.mdw.conf:
	$(call v_tag,COPY)cp mdw.conf $@.new && mv $@.new $@

## Utility packages.
PACKAGES		+= mlib checkpath
mlib_CHECK		 = crc-mktab
checkpath_CHECK		 = tmpdir
checkpath_DEPS		 = mlib

## Packaging machinery.
SCRIPTLINKS		+= mdw-build mdw-sbuild mdw-sbuild-server
SCRIPTLINKS		+= update-buildable-branch

## Shells.
DOTLINKS		+= .profile .shell-rc .shell-logout
DOTLINKS		+= .shrc
DOTLINKS		+= .zprofile .zshrc .zlogout .zshenv
DOTLINKS		+= .bash_profile .bash_completion .bash_logout
DOTLINKS		+= .bashrc .inputrc
.bash_profile_SRC	 = bash-profile
.bash_completion_SRC	 = bash-completion
.bash_logout_SRC	 = shell-logout
.zlogout_SRC		 = shell-logout

all::
	$(V_AT)if [ $(HOME)/.zcompdump -ot dot/zshrc ]; then \
	  $(call v_print,ZAP,$(HOME)/.zcompdump)rm -f $(HOME)/.zcompdump; \
	fi

## The Plan 9 `rc' shell.  This needs special hacking, because the Linux port
## and Plan 9 From User Space have incompatible syntax.
DOTLINKS		+= lib/profile
lib/profile_SRC		 = rcrc
all:: $(HOME)/.rcrc
$(HOME)/.rcrc: dot/rcrc
	$(call v_tag,SED)sed 's/; if not/else/' $< >$@.new && mv $@.new $@

## Git.
DOTSUBST		+= .gitconfig
SCRIPTLINKS		+= git-copyright-dates
DOTLINKS		+= .cgrc .tigrc
.gitconfig_SUBSTS	 = \
	$(call substvar,releasekey,$(call mdw-conf,release-key,481334C2))
$(HOME)/.gitconfig: $(HOME)/.mdw.conf

## PulseAudio.
DOTLINKS		+= .pulse/daemon.conf
DOTSUBST		+= .pulse/default.pa
.pulse/daemon.conf_SRC	 = pulse-daemon.conf
.pulse/default.pa_SRC	 = pulse-default.pa.in

## Other editors.
DOTLINKS		+= .vimrc .mg .zile

## Mail.
DOTLINKS		+= .mailrc .signature .muttrc

## Lisp.
DOTLINKS		+= .cmucl-init.lisp .sbclrc .clisprc.lisp .eclrc
.cmucl-init.lisp_SRC	 = lisp-init.lisp
.sbclrc_SRC		 = lisp-init.lisp
.clisprc.lisp_SRC	 = lisp-init.lisp
.eclrc_SRC		 = lisp-init.lisp
DOTLINKS		+= .swank.lisp

## IPython.
DOTLINKS		+= .ipython/profile_default/ipython_config.py
DOTLINKS		+= .ipython/profile_default/startup/50-key-bindings.py
.ipython/profile_default/ipython_config.py_SRC = ipython-config.py
.ipython/profile_default/startup/50-key-bindings.py_SRC = ipython-key-bindings.py

## Other languages.
DOTLINKS		+= .guile
DOTLINKS		+= .tclshrc .wishrc
.tclshrc_SRC		 = tclshrc
.wishrc_SRC		 = tclshrc

## Random scripts.
SCRIPTLINKS		+= mdw-editor mdw-pager
SCRIPTLINKS		+= mdw-conf
SCRIPTLINKS		+= svnwrap
SCRIPTLINKS		+= guest-console
SCRIPTLINKS		+= hyperspec

## Random odds and ends.
DOTLINKS		+= .infokey .sqliterc
DOTLINKS		+= .gdbinit .toprc .aspell.conf
DOTLINKS		+= .dircolors .colordiffrc .screenrc .tmux.conf
DOTLINKS		+= .cvsrc .indent.pro .ditz-config
DOTLINKS		+= .lftp/rc
.lftp/rc_SRC		 = lftp-rc
DOTSUBST		+= .mykermrc
SCRIPTLINKS		+= lesspipe.sh

SCRIPTLINKS		+= run-with-shell-env
SCRIPTLINKS		+= start-ssh-agent start-ssh-pageant
SCRIPTLINKS		+= add-ssh-keys
SCRIPTLINKS		+= hacks/ssh/ssh
hacks/ssh/ssh_SRC	 = hacks/ssh

DOTLINKS		+= .w3m/config .elinks/elinks.conf
.w3m/config_SRC		 = w3m-config
.elinks/elinks.conf_SRC	 = elinks.conf

DOTLINKS		+= .mc/ini .mc/panels.ini
.mc/ini_SRC		 = mc-ini
.mc/panels.ini_SRC	 = mc-panels.ini

DOTLINKS		+= .parallel/config
.parallel/config_SRC	 = parallel-config

all:: $(HOME)/.less
$(HOME)/.less: dot/lesskey
	$(V_AT)rm -f $(HOME)/.lesskey
	$(call v_tag,LESSKEY)lesskey -o$@ $<

###--------------------------------------------------------------------------
### X11 configuration.

ifeq ($X,t)

PACKAGES		+= xtoys
xtoys_CHECK		 = xatom
xtoys_DEPS		 = mlib

DOTLINKS		+= .xinitrc .xsession .xmodmap .vncrc .vncsession
DOTLINKS		+= .fonts.conf
DOTLINKS		+= .stalonetrayrc

DOTLINKS		+= .putty/sessions/Default%20Settings
.putty/sessions/Default%20Settings_SRC = putty-defaults

DOTLINKS		+= .config/gnome-session/sessions/mdw.session
.config/gnome-session/sessions/mdw.session_SRC = mdw.session

DOTLINKS		+= .Eterm/themes/Eterm/theme.cfg
DOTLINKS		+= .enlightenment/keybindings.cfg
DOTLINKS		+= .enlightenment-vnc/keybindings.cfg
DOTLINKS		+= .e16/bindings.cfg
.Eterm/themes/Eterm/theme.cfg_SRC = eterm-theme.cfg
.enlightenment/keybindings.cfg_SRC = e-keybindings.cfg
.enlightenment-vnc/keybindings.cfg_SRC = evnc-keybindings.cfg
.e16/bindings.cfg_SRC	 = e16-bindings

DOTLINKS		+= .gtkrc-2.0
DOTLINKS		+= .config/gtk-3.0/gtk.css
DOTLINKS		+= .config/gtk-3.0/settings.ini
.config/gtk-3.0/gtk.css_SRC = gtk3.css
.config/gtk-3.0/settings.ini_SRC = gtk3-settings.ini

SCRIPTLINKS		+= xinitcmd lock-screen xshutdown
SCRIPTLINKS		+= un-backslashify-selection
SCRIPTLINKS		+= xpra-start-xdummy
SCRIPTLINKS		+= play-rawk
SCRIPTLINKS		+= media-keys
SCRIPTLINKS		+= disorder-notify

DOTCPP			+= .Xdefaults
Xdefaults_DEFS		 = -DEMACSWD=$(call mdw-conf,emacs-width,77)
$(HOME)/.Xdefaults: $(HOME)/.mdw.conf

ifeq ($(shell case $${DISPLAY-nil} in (:[0-9]*) echo t ;; (*) echo nil ;; esac),t)
dotfile-hook/.Xdefaults = \
	$(call v_tag,XRDB)xrdb -override $<
endif

endif

###--------------------------------------------------------------------------
### Processing dotfiles.

dotfile-source		 = $(HERE)/dot/$(or $($1_SRC), $(1:.%=%)$2)

## Easiest: just make symlinks.
dotlink-ok-p		 = \
	$(call symlink-ok-p,$(HOME)/$1,$(call dotfile-source,$1))
all:: $(addprefix $(HOME)/, $(DOTLINKS))
$(addprefix $(HOME)/, $(subst %,\%,$(DOTLINKS))): $(HOME)/%: \
		$$(if $$(call dotlink-ok-p,$$*),,_force)
	$(call v_tag,SYMLINK)mkdir -p $(dir $@) && \
		rm -f $@.new && \
		ln -s $(call dotfile-source,$*) $@.new && \
		mv $@.new $@
	$(dotfile-hook/$*)

## Hack with the C preprocessor.
all:: $(addprefix $(HOME)/, $(DOTCPP))
$(addprefix $(HOME)/, $(subst %,\%,$(DOTCPP))): $(HOME)/%: \
		$$(call dotfile-source,$$*) Makefile
	$(call v_tag,CPP)mkdir -p $(dir $@) && \
		rm -f $@.new && \
		cpp -P -o$@.new $($*_DEFS) $< && \
		mv $@.new $@
	$(dotfile-hook/$*)

## Hack by making simple substitutions.
substvar		 = -e $(call quote,s@$1@$2g)
SUBSTS			+= $(call substvar,home,$(HOME))
SUBSTS			+= $(call substvar,profile,$(HERE))
all:: $(addprefix $(HOME)/, $(DOTSUBST))
$(addprefix $(HOME)/, $(subst %,\%,$(DOTSUBST))): $(HOME)/%: \
		$$(call dotfile-source,$$*,.in) Makefile
	$(call v_tag,SUBST)mkdir -p $(dir $@) && \
		rm -f $@.new && \
		sed -e "1i\
$(relax)### generated by $(HERE)/Makefile; do not edit!" \
			$(SUBSTS) $($*_SUBSTS) \
			$(call dotfile-source,$*,.in) >$@.new && \
		mv $@.new $@
	$(dotfile-hook/$*)

###--------------------------------------------------------------------------
### Processing script links.

script-source		 = $(HERE)/bin/$(or $($1_SRC), $1)

ifeq ($(prefix-shebang-p),t)
all:: $(addprefix $(HOME)/bin/, $(SCRIPTLINKS))
$(addprefix $(HOME)/bin/, $(SCRIPTLINKS)): $(HOME)/bin/%: \
		$$(call script-source,$$*) Makefile
	$(call v_tag,SHEBANG)mkdir -p $(dir $@) && \
		rm -f $@.new && \
		sed "1s\(#! *\)/\1$(SHEBANG_PREFIX)/" \
			$(call script-source,$*) >$@.new && \
		chmod --reference=$(call script-source,$*) $@.new && \
		mv $@.new $@
	$(script-hook/$*)
else
scriptlink-ok-p		 = \
	$(call symlink-ok-p,$(HOME)/bin/$1,$(call script-source,$1))
all:: $(addprefix $(HOME)/bin/, $(SCRIPTLINKS))
$(addprefix $(HOME)/bin/, $(SCRIPTLINKS)): $(HOME)/bin/%: \
		$$(if $$(call scriptlink-ok-p,$$*),,_force)
	$(call v_tag,SYMLINK)mkdir -p $(dir $@) && \
		rm -f $@.new && \
		ln -s $(call script-source,$*) $@.new && \
		mv $@.new $@
	$(script-hook/$*)
endif

all:: $(addprefix $(HOME)/bin/, $(SCRIPTLINKS))

###--------------------------------------------------------------------------
### Building packages from source tarballs.

SRCDIR			 = $(HOME)/src/profile

pkg-builddir		 = $(SRCDIR)/$1/build
pkg-stamp		 = $(call pkg-builddir,$1)/$2-stamp

$(foreach p, $(PACKAGES), $(eval DEP_$p = $(if $(shell \
	if $($p_CHECK) >/dev/null 2>&1 --version; then echo t; fi),, \
	$(call pkg-stamp,$p,install))))

$(PACKAGES:%=$(SRCDIR)/%.tar.gz): $(SRCDIR)/%.tar.gz:
	$(call v_tag,FETCH)mkdir -p $(SRCDIR) && \
		rm -f $@.new && \
		$(call get-url,$@.new,$(REPO)/$*.tar.gz) && \
		mv $@.new $@

$(foreach p, $(PACKAGES), $(call pkg-stamp,$p,unpack)): \
		$(call pkg-stamp,%,unpack): $(SRCDIR)/%.tar.gz
	$(call v_tag,EXTRACT)rm -rf $(SRCDIR)/$* && \
		mkdir $(SRCDIR)/$*.tmp-unpack && \
		cd $(SRCDIR)/$*.tmp-unpack && \
		gzip -cd ../$*.tar.gz | tar xf - && \
		mv * ../$* && \
		cd .. && \
		rmdir $*.tmp-unpack && \
		mkdir $*/build && \
		touch $*/build/unpack-stamp

$(foreach p, $(PACKAGES), $(call pkg-stamp,$p,configure)): \
		$(call pkg-stamp,%,configure): \
		$(call pkg-stamp,%,unpack) \
		$$(foreach p, $$($$*_DEPS), $$(DEP_$$p))
	$(call v_tag,CONFIG)cd $(dir $@) && \
		../configure --prefix=$(HOME) \
			PKG_CONFIG_PATH=$(HOME)/lib/pkgconfig \
			$($*_CONFIG) >>buildlog 2>&1 && \
		touch configure-stamp

$(foreach p, $(PACKAGES), $(call pkg-stamp,$p,build)): \
		$(call pkg-stamp,%,build): \
		$(call pkg-stamp,%,configure)
	$(call v_tag,BUILD)cd $(dir $@) && \
		$(MAKE) $($*_MAKEFLAGS) >>buildlog 2>&1 && \
		touch build-stamp

$(foreach p, $(PACKAGES), $(call pkg-stamp,$p,install)): \
		$(call pkg-stamp,%,install): \
		$(call pkg-stamp,%,build)
	$(call v_tag,INSTALL)cd $(dir $@) && \
		$(MAKE) $($*_MAKEFLAGS) install >>buildlog 2>&1 && \
		touch install-stamp
	$(package-hook/$*)

all:: $(foreach p, $(PACKAGES), $(DEP_$p))
$(foreach p, $(PACKAGES), $(eval _pkg.$p: $(call pkg-stamp,$p,install)))

###----- That's all, folks --------------------------------------------------