# Maintenance productions for the automated test directory
# Copyright (C) 2010-2011 Free Software Foundation, Inc.

# This file is part of GNU Emacs.

# GNU Emacs is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# GNU Emacs is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.

SHELL = /bin/sh

srcdir = @srcdir@
top_srcdir = @top_srcdir@
abs_top_builddir = @abs_top_builddir@
test = $(srcdir)
VPATH = $(srcdir)
lispsrc = $(top_srcdir)/lisp
lisp = ${abs_top_builddir}/lisp

# You can specify a different executable on the make command line,
# e.g. "make EMACS=../src/emacs ...".

# We sometimes change directory before running Emacs (typically when
# building out-of-tree, we chdir to the source directory), so we need
# to use an absolute file name.
EMACS = ${abs_top_builddir}/src/emacs

# Command line flags for Emacs.

EMACSOPT = -batch --no-site-file --no-site-lisp

# Extra flags to pass to the byte compiler
BYTE_COMPILE_EXTRA_FLAGS =
# For example to not display the undefined function warnings you can use this:
# BYTE_COMPILE_EXTRA_FLAGS = --eval '(setq byte-compile-warnings (quote (not unresolved)))'
# The example above is just for developers, it should not be used by default.

# The actual Emacs command run in the targets below.
emacs = EMACSLOADPATH=$(lispsrc):$(test) LC_ALL=C $(EMACS) $(EMACSOPT)

# Common command to find subdirectories
setwins=subdirs=`(find . -type d -print)`; \
	for file in $$subdirs; do \
	   case $$file in */.* | */.*/* | */=* ) ;; \
		*) wins="$$wins $$file" ;; \
	   esac; \
        done

all: test

doit:


# Files MUST be compiled one by one. If we compile several files in a
# row (i.e., in the same instance of Emacs) we can't make sure that
# the compilation environment is clean.  We also set the load-path of
# the Emacs used for compilation to the current directory and its
# subdirectories, to make sure require's and load's in the files being
# compiled find the right files.

.SUFFIXES: .elc .el

# An old-fashioned suffix rule, which, according to the GNU Make manual,
# cannot have prerequisites.
.el.elc:
	@echo Compiling $<
	@$(emacs) $(BYTE_COMPILE_EXTRA_FLAGS) -f batch-byte-compile $<

.PHONY: lisp-compile compile-main compile compile-always

lisp-compile:
	cd $(lisp); $(MAKE) $(MFLAGS) compile EMACS=$(EMACS)

# In `compile-main' we could directly do
#    ... | xargs $(MAKE) $(MFLAGS) EMACS="$(EMACS)"
# and it works, but it generates a lot of messages like
#    make[2]: « gnus/gnus-mlspl.elc » is up to date.
# so instead, we use "xargs echo" to split the list of file into manageable
# chunks and then use an intermediate `compile-targets' target so the
# actual targets (the .elc files) are not mentioned as targets on the
# make command line.


.PHONY: compile-targets
# TARGETS is set dynamically in the recursive call from `compile-main'.
compile-targets: $(TARGETS)

# Compile all the Elisp files that need it.  Beware: it approximates
# `no-byte-compile', so watch out for false-positives!
compile-main: compile-clean lisp-compile
	@(cd $(test); $(setwins); \
	els=`echo "$$wins " | sed -e 's|/\./|/|g' -e 's|/\. | |g' -e 's| |/*.el |g'`; \
	for el in $$els; do \
	  test -f $$el || continue; \
	  test ! -f $${el}c && GREP_OPTIONS= grep '^;.*no-byte-compile: t' $$el > /dev/null && continue; \
	  echo "$${el}c"; \
	done | xargs echo) | \
	while read chunk; do \
	  $(MAKE) $(MFLAGS) compile-targets EMACS="$(EMACS)" TARGETS="$$chunk"; \
	done

.PHONY: compile-clean
# Erase left-over .elc files that do not have a corresponding .el file.
compile-clean:
	@cd $(test); $(setwins); \
	elcs=`echo "$$wins " | sed -e 's|/\./|/|g' -e 's|/\. | |g' -e 's| |/*.elc |g'`; \
	for el in $$(echo $$elcs | sed -e 's/\.elc/\.el/g'); do \
	  if test -f "$$el" -o \! -f "$${el}c"; then :; else \
	    echo rm "$${el}c"; \
	    rm "$${el}c"; \
	  fi \
	done

# Compile all Lisp files, but don't recompile those that are up to
# date.  Some .el files don't get compiled because they set the
# local variable no-byte-compile.
# Calling make recursively because suffix rule cannot have prerequisites.
# Explicitly pass EMACS (sometimes ../src/bootstrap-emacs) to those
# sub-makes that run rules that use it, for the sake of some non-GNU makes.
compile: $(LOADDEFS) autoloads compile-first
	$(MAKE) $(MFLAGS) compile-main EMACS=$(EMACS)

# Compile all Lisp files.  This is like `compile' but compiles files
# unconditionally.  Some files don't actually get compiled because they
# set the local variable no-byte-compile.
compile-always: doit
	cd $(test); rm -f *.elc */*.elc */*/*.elc */*/*/*.elc
	$(MAKE) $(MFLAGS) compile EMACS=$(EMACS)

bootstrap-clean:
	cd $(test); rm -f *.elc */*.elc */*/*.elc */*/*/*.elc

distclean:
	-rm -f ./Makefile

maintainer-clean: distclean bootstrap-clean

check: compile-main
	@(cd $(test); $(setwins); \
	pattern=`echo "$$wins " | sed -e 's|/\./|/|g' -e 's|/\. | |g' -e 's| |/*.el |g'`; \
	for el in $$pattern; do \
	  test -f $$el || continue; \
	  args="$$args -l $$el"; \
	  els="$$els $$el"; \
	done; \
	echo Testing $$els; \
	$(emacs) $$args -f ert-run-tests-batch-and-exit)

# Makefile ends here.