# Most of this is probably too coreutils-centric to be useful to other packages.

bin=bin-$$$$

write_loser = printf '\#!%s\necho $$0: bad path 1>&2; exit 1\n' '$(SHELL)'

tmpdir = $(abs_top_builddir)/tests/torture

t=$(tmpdir)/$(PACKAGE)/test

pfx=$(t)/i

built_programs =						\

  $$(echo 'spy:;@echo $$(bin_PROGRAMS)'				\

    | MAKEFLAGS= $(MAKE) -s -f Makefile -f - spy		\

    | fmt -1 | sed 's,$(EXEEXT)$$,,' | sort -u)

# More than once, tainted build and source directory names would

# have caused at least one "make check" test to apply "chmod 700"

# to all directories under $HOME.  Make sure it doesn't happen again.

tp = $(tmpdir)/taint

t_prefix = $(tp)/a

t_taint = '$(t_prefix) b'

fake_home = $(tp)/home

# When extracting from a distribution tarball, extract using the fastest

# method possible.  With dist-xz, that means using the *.xz file.

ifneq ('', $(filter *.xz, $(DIST_ARCHIVES)))

  tar_decompress_opt_ = J

  suffix_ = xz

else

  ifneq ('', $(filter *.gz, $(DIST_ARCHIVES)))

    tar_decompress_opt_ = z

    suffix_ = gz

  else

    tar_decompress_opt_ = j

    suffix_ = bz2

  endif

endif

amtar_extract_ = $(AMTAR) -$(tar_decompress_opt_)xf

preferred_tarball_ = $(distdir).tar.$(suffix_)

# Ensure that tests run from tainted build and src dir names work,

# and don't affect anything in $HOME.  Create witness files in $HOME,

# record their attributes, and build/test.  Then ensure that the

# witnesses were not affected.

# Skip this test when using libtool, since libtool-generated scripts

# cannot deal with a space-tainted srcdir.

ALL_RECURSIVE_TARGETS += taint-distcheck

taint-distcheck: $(DIST_ARCHIVES)

	grep '^[	 ]*LT_INIT' configure.ac >/dev/null && exit 0 || :

	test -d $(t_taint) && chmod -R 700 $(t_taint) || :

	-rm -rf $(t_taint) $(fake_home)

	mkdir -p $(t_prefix) $(t_taint) $(fake_home)

	$(amtar_extract_) $(preferred_tarball_) -C $(t_taint)

	mkfifo $(fake_home)/fifo

	touch $(fake_home)/f

	mkdir -p $(fake_home)/d/e

	ls -lR $(fake_home) $(t_prefix) > $(tp)/.ls-before

	HOME=$(fake_home); export HOME;			\

	cd $(t_taint)/$(distdir)			\

	  && ./configure				\

	  && $(MAKE)					\

	  && $(MAKE) check				\

	  && ls -lR $(fake_home) $(t_prefix) > $(tp)/.ls-after \

	  && diff $(tp)/.ls-before $(tp)/.ls-after	\

	  && test -d $(t_prefix)

	rm -rf $(tp)

# Verify that a twisted use of --program-transform-name=PROGRAM works.

define install-transform-check

  echo running install-transform-check			\

    && rm -rf $(pfx)					\

    && $(MAKE) program_transform_name='s/.*/zyx/'	\

      prefix=$(pfx) install				\

    && test "$$(echo $(pfx)/bin/*)" = "$(pfx)/bin/zyx"	\

    && test "$$(find $(pfx)/share/man -type f|sed 's,.*/,,;s,\..*,,')" = "zyx"

endef

# Install, then verify that all binaries and man pages are in place.

# Note that neither the binary, ginstall, nor the [.1 man page is installed.

define my-instcheck

  echo running my-instcheck;				\

  $(MAKE) prefix=$(pfx) install				\

    && test ! -f $(pfx)/bin/ginstall			\

    && { fail=0;					\

      for i in $(built_programs); do			\

        test "$$i" = ginstall && i=install;		\

        for j in "$(pfx)/bin/$$i"			\

                 "$(pfx)/share/man/man1/$$i.1"; do	\

          case $$j in *'[.1') continue;; esac;		\

          test -f "$$j" && :				\

            || { echo "$$j not installed"; fail=1; };	\

        done;						\

      done;						\

      test $$fail = 1 && exit 1 || :;			\

    }

endef

# The hard-linking for-loop below ensures that there is a bin/ directory

# full of all of the programs under test (except the ones that are required

# for basic Makefile rules), all symlinked to the just-built "false" program.

# This is to ensure that if ever a test neglects to make PATH include

# the build srcdir, these always-failing programs will run.

# Otherwise, it is too easy to test the wrong programs.

# Note that "false" itself is a symlink to true, so it too will malfunction.

define coreutils-path-check

  {							\

    echo running coreutils-path-check;			\

    if test -f $(srcdir)/src/true.c; then		\

      fail=1;						\

      mkdir $(bin)					\

	&& ($(write_loser)) > $(bin)/loser		\

	&& chmod a+x $(bin)/loser			\

	&& for i in $(built_programs); do		\

	       case $$i in				\

		 rm|expr|basename|echo|sort|ls|tr);;	\

		 cat|dirname|mv|wc);;			\

		 *) ln $(bin)/loser $(bin)/$$i;;	\

	       esac;					\

	     done					\

	  && ln -sf ../src/true $(bin)/false		\

	  && PATH=`pwd`/$(bin)$(PATH_SEPARATOR)$$PATH	\

		$(MAKE) -C tests check			\

	  && { test -d gnulib-tests			\

		 && $(MAKE) -C gnulib-tests check	\

		 || :; }				\

	  && rm -rf $(bin)				\

	  && fail=0;					\

    else						\

      fail=0;						\

    fi;							\

    test $$fail = 1 && exit 1 || :;			\

  }

endef

# More generic version of the rule above.

define generic-path-check

  {							\

    echo running generic-path-check;			\

    if test -f /bin/false; then				\

      fail=1;						\

      mkdir $(bin)					\

	&& ($(write_loser)) > $(bin)/loser		\

	&& chmod a+x $(bin)/loser			\

	&& for i in $(built_programs); do		\

	     ln $(bin)/loser $(bin)/$$i;		\

	   done						\

	&& PATH=`pwd`/$(bin)$(PATH_SEPARATOR)$$PATH	\

	     $(MAKE) check				\

	&& { test -d gnulib-tests			\

	       && $(MAKE) -C gnulib-tests check		\

	       || :; }					\

	&& rm -rf $(bin)				\

	&& fail=0;					\

    else						\

      fail=0;						\

    fi;							\

    test $$fail = 1 && exit 1 || :;			\

  }

endef

# Use this to make sure we don't run these programs when building

# from a virgin compressed tarball file, below.

null_AM_MAKEFLAGS ?= \

  ACLOCAL=false \

  AUTOCONF=false \

  AUTOMAKE=false \

  AUTOHEADER=false \

  GPERF=false \

  MAKEINFO=false

ALL_RECURSIVE_TARGETS += my-distcheck

my-distcheck: $(DIST_ARCHIVES) $(local-check)

	$(MAKE) syntax-check

	$(MAKE) check

	-rm -rf $(t)

	mkdir -p $(t)

	$(amtar_extract_) $(preferred_tarball_) -C $(t)

	(set -e; cd $(t)/$(distdir);			\

	  ./configure --quiet --enable-gcc-warnings --disable-nls; \

	  $(MAKE) AM_MAKEFLAGS='$(null_AM_MAKEFLAGS)';	\

	  $(MAKE) dvi;					\

	  $(install-transform-check);			\

	  $(my-instcheck);				\

	  $(coreutils-path-check);			\

	  $(generic-path-check);			\

	  $(MAKE) distclean				\

	)

	(cd $(t) && mv $(distdir) $(distdir).old	\

	  && $(amtar_extract_) - ) < $(preferred_tarball_)

	find $(t)/$(distdir).old $(t)/$(distdir) -name .deps | xargs rmdir

	diff -ur $(t)/$(distdir).old $(t)/$(distdir)

	-rm -rf $(t)

	rmdir $(tmpdir)/$(PACKAGE) $(tmpdir)

	@echo "========================"; \

	echo "ready for distribution:"; \

	for i in $(DIST_ARCHIVES); do echo "  $$i"; done; \

	echo "========================"