### @configure_input@

# Copyright (C) 2010-2017 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/>.

### Commentary:

## Some targets:
## check: re-run all tests, writing to .log files.
## check-maybe: run all tests which are outdated with their .log file
## or the source files they are testing.
## filename.log: run tests from filename.el(c) if .log file needs updating
## filename: re-run tests from filename.el(c), with no logging

### Code:

SHELL = @SHELL@

srcdir = @srcdir@
VPATH = $(srcdir)

FIND_DELETE = @FIND_DELETE@
MKDIR_P = @MKDIR_P@

SEPCHAR = @SEPCHAR@

# We never change directory before running Emacs, so a relative file
# name is fine, and makes life easier.  If we need to change
# directory, we can use emacs --chdir.
EMACS = ../src/emacs

EMACS_EXTRAOPT=

# Command line flags for Emacs.
# Apparently MSYS bash would convert "-L :" to "-L ;" anyway,
# but we might as well be explicit.
EMACSOPT = -batch --no-site-file --no-site-lisp -L "$(SEPCHAR)$(srcdir)" $(EMACS_EXTRAOPT)

# Prevent any settings in the user environment causing problems.
unexport EMACSDATA EMACSDOC EMACSPATH GREP_OPTIONS

## To run tests under a debugger, set this to eg: "gdb --args".
GDB =

# The locale to run tests under.  Tests should work if this is set to
# any supported locale.  Use the C locale by default, as it should be
# supported everywhere.
TEST_LOCALE = C

# The actual Emacs command run in the targets below.
# Prevent any setting of EMACSLOADPATH in user environment causing problems.
emacs = EMACSLOADPATH= LC_ALL=$(TEST_LOCALE) EMACS_TEST_DIRECTORY=$(srcdir) \
 $(GDB) "$(EMACS)" $(EMACSOPT)

.PHONY: all check

all: check

%.elc: %.el
	@echo Compiling $<
	@$(emacs) -f batch-byte-compile $<

## Ignore any test errors so we can continue to test other files.
## But compilation errors are always fatal.
WRITE_LOG = > $@ 2>&1 || { stat=ERROR; cat $@; }; echo $$stat: $@

## I'd prefer to use -emacs -f ert-run-tests-batch-and-exit rather
## than || true, since the former makes problems more obvious.
## I'd also prefer to @-hide the grep part and not the
## ert-run-tests-batch-and-exit part.
##
## We need to use $loadfile because:
## i) -L :$srcdir -l basename does not work, because we have files whose
## basename duplicates a file in lisp/ (eg eshell.el).
## ii) Although -l basename will automatically load .el or .elc,
## -l ./basename treats basename as a literal file (it would be nice
## to change this; bug#17848 - if that gets done, this can be simplified).
##
## Beware: it approximates 'no-byte-compile', so watch out for false-positives!
SELECTOR_DEFAULT = (quote (not (tag :expensive-test)))
SELECTOR_EXPENSIVE = nil
ifdef SELECTOR
SELECTOR_ACTUAL=$(SELECTOR)
else ifndef MAKECMDGOALS
SELECTOR_ACTUAL=$(SELECTOR_DEFAULT)
else ifeq ($(MAKECMDGOALS),all)
SELECTOR_ACTUAL=$(SELECTOR_DEFAULT)
else ifeq ($(MAKECMDGOALS),check)
SELECTOR_ACTUAL=$(SELECTOR_DEFAULT)
else ifeq ($(MAKECMDGOALS),check-maybe)
SELECTOR_ACTUAL=$(SELECTOR_DEFAULT)
else
SELECTOR_ACTUAL=$(SELECTOR_EXPENSIVE)
endif

## Byte-compile all test files to test for errors (unless explicitly
## told not to), but then evaluate the un-byte-compiled files, because
## they give cleaner stacktraces.

## Beware: it approximates 'no-byte-compile', so watch out for false-positives!
%.log: %.el
	elc=$<c; \
	if ! grep '^;.*no-byte-compile: t' $< > /dev/null; then \
	  ${MAKE} $$elc; \
	fi; \
	loadfile=$<; \
	echo Testing $$loadfile; \
	stat=OK ; \
	${MKDIR_P} $(dir $@) ; \
	$(emacs) -l ert -l $$loadfile \
	  --eval "(ert-run-tests-batch-and-exit ${SELECTOR_ACTUAL})" ${WRITE_LOG}

ELFILES := $(shell find ${srcdir} -path "${srcdir}/manual" -prune -o \
		-name "*resources" -prune -o -name "*.el" -print)
## .log files may be in a different directory for out of source builds
LOGFILES := $(patsubst %.el,%.log, \
		$(patsubst $(srcdir)/%,%,$(ELFILES)))
TESTS := $(LOGFILES:.log=)

## If we have to interrupt a hanging test, preserve the log so we can
## see what the problem was.
.PRECIOUS: %.log

.PHONY: ${TESTS}

define test_template
  ## A test FOO-tests depends on the source file with the similar
  ## name, unless FOO itself contains the string '-tests/'.
  ## The similar name is FOO.c if FOO begins with 'src/', FOO.el
  ## otherwise.  Although this heuristic does not identify all the
  ## dependencies, it is better than nothing.
  ifeq (,$(patsubst %-tests,,$(1))$(findstring -tests/,$(1)))
    $(1).log: $(patsubst %-tests,$(srcdir)/../%,$(1))$(if \
					$(patsubst src/%,,$(1)),.el,.c)
  endif

  ## Short aliases that always re-run the tests, with no logging.
  ## Define both with and without the directory name for ease of use.
  .PHONY: $(1) $(notdir $(1))
  $(1):
	@test ! -f $(1).log || mv $(1).log $(1).log~
	@$(MAKE) $(1).log WRITE_LOG=
  $(notdir $(1)): $(1)
endef

$(foreach test,${TESTS},$(eval $(call test_template,${test})))

## Check that there is no 'automated' subdirectory, which would
## indicate an incomplete merge from an older version of Emacs where
## the tests were arranged differently.
.PHONY: check-no-automated-subdir
check-no-automated-subdir:
	test ! -d $(srcdir)/automated

## Rerun all default tests.
check: mostlyclean check-no-automated-subdir
	@${MAKE} check-doit SELECTOR="${SELECTOR_ACTUAL}"

## Rerun all default and expensive tests.
.PHONY: check-expensive
check-expensive: mostlyclean check-no-automated-subdir
	@${MAKE} check-doit SELECTOR="${SELECTOR_EXPENSIVE}"

## Re-run all tests which are outdated. A test is outdated if its
## logfile is out-of-date with either the test file, or the source
## files that the tests depend on.  See test_template.
.PHONY: check-maybe
check-maybe: check-no-automated-subdir
	@${MAKE} check-doit SELECTOR="${SELECTOR_ACTUAL}"

## Run the tests.
.PHONY: check-doit
check-doit: ${LOGFILES}
	@$(emacs) -l ert -f ert-summarize-tests-batch-and-exit $^

.PHONY: mostlyclean clean bootstrap-clean distclean maintainer-clean

mostlyclean:
	-@for f in ${LOGFILES}; do test ! -f $$f || mv $$f $$f~; done
	rm -f *.tmp

clean:
	find . '(' -name '*.log' -o -name '*.log~' ')' $(FIND_DELETE)

bootstrap-clean: clean
	find $(srcdir) -name '*.elc' $(FIND_DELETE)

distclean: clean
	rm -f Makefile

maintainer-clean: distclean bootstrap-clean