6 files changed, 144 insertions, 53 deletions
diff --git a/build-aux/Makefile.each.tail/00-dist.mk b/build-aux/Makefile.each.tail/00-dist.mk
new file mode 100644
index 0000000..bc2a3d5
--- /dev/null
+++ b/build-aux/Makefile.each.tail/00-dist.mk
@@ -0,0 +1 @@
+_dist.files := $(strip $(_dist.files) $(call at.addprefix,$(srcdir),$(files.src)))
diff --git a/build-aux/Makefile.each.tail/00-mod.mk b/build-aux/Makefile.each.tail/00-mod.mk
new file mode 100644
index 0000000..d6514dd
--- /dev/null
+++ b/build-aux/Makefile.each.tail/00-mod.mk
@@ -0,0 +1,44 @@
+# Copyright (C) 2016  Luke Shumaker
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+$(outdir)/at-variables $(outdir)/at-variables-local: _mod.VARIABLES := $(filter-out $(call quote.pattern,$(_at.VARIABLES)),$(.VARIABLES))
+$(outdir)/at-variables-global:
+	@printf '%s\n' $(call quote.shell-each,$(sort $(.VARIABLES)))
+$(outdir)/at-variables-local:
+	@printf '%s\n' $(call quote.shell-each,$(sort $(_mod.VARIABLES)))
+$(outdir)/at-variables $(outdir)/at-values:
+	@printf '%s\n' $(call quote.shell-each,$(sort $(.VARIABLES),$(_mod.VARIABLES)))
+$(outdir)/at-variables/%:
+	@printf '%s\n' $(call quote.shell,$($*))
+$(outdir)/at-values/%:
+	@printf '%s\n' $(call quote.shell,$(value $*))
+.PHONY:       $(addprefix $(outdir)/, at-variables-global at-variables-local at-variables at-values)
+at.targets += $(addprefix $(outdir)/, at-variables-global at-variables-local at-variables at-values at-variables/% at-values/%)
+
+$(outdir)/at-modules:
+	@printf 'Autothing modules used in this project:\n'
+	@printf ' - %s\n' $(foreach _mod.tmp,$(_mod.modules),$(call quote.shell,$(_mod.tmp)	$(mod.$(_mod.tmp).description)	$(if $(mod.$(_mod.tmp).doc),(more))))|column -t -s $$'\t'
+$(addprefix $(outdir)/at-modules/,$(_mod.modules)): $(outdir)/at-modules/%:
+	@printf 'Name          : %s\n' $(call quote.shell,$*)
+	@printf 'Description   : %s\n' $(call quote.shell,$(mod.$*.description))
+	@echo   'Depends on    :' $(sort $(mod.$*.depends))
+	@echo   'Files         :'
+	@printf '  %s\n' $(call quote.shell-each,$(call at.relto,$(topsrcdir),$(sort $(mod.$*.files) $(wildcard $(topsrcdir)/build-aux/Makefile.*/??-$*.mk))))
+	@echo   'Documentation :'
+	@printf '%s\n' $(call quote.shell,$(mod.$*.doc)) | sed -e 's/^# /  /' -e 's/^#//'
+
+$(outdir)/at-noop:
+.PHONY:       $(outdir)/at-noop
+at.targets += $(outdir)/at-noop
diff --git a/build-aux/Makefile.each.tail/00-var.mk b/build-aux/Makefile.each.tail/00-var.mk
new file mode 100644
index 0000000..c2fd9d7
--- /dev/null
+++ b/build-aux/Makefile.each.tail/00-var.mk
@@ -0,0 +1,22 @@
+# Copyright (C) 2016  Luke Shumaker
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+mod.var.depends += quote write-ifchanged
+
+$(outdir)/.var.%: _var.FORCE
+	@printf '%s' $(call quote.shell,$($*)) | sed 's/^/#/' | $(WRITE_IFCHANGED) $@
+-include $(wildcard $(outdir)/.var.*)
+
+at.targets += $(addprefix $(outdir)/,.var.%)
diff --git a/build-aux/Makefile.each.tail/10-files.mk b/build-aux/Makefile.each.tail/10-files.mk
new file mode 100644
index 0000000..8ab187b
--- /dev/null
+++ b/build-aux/Makefile.each.tail/10-files.mk
@@ -0,0 +1,57 @@
+# Copyright (C) 2015-2016  Luke Shumaker
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# Add some more defaults to the *_files variables
+
+$(eval \
+  $(foreach _files.var,$(filter files.src files.src.%,$(.VARIABLES)),\
+    _$(_files.var) = $$(call at.addprefix,$$(srcdir),$$($(_files.var)))$(at.nl))\
+  $(foreach _files.var,$(filter files.out files.out.%,$(.VARIABLES)),\
+    _$(_files.var) = $$(call at.addprefix,$$(outdir),$$($(_files.var)))$(at.nl))\
+  $(foreach _files.var,$(filter files.sys files.sys.%,$(.VARIABLES)),\
+    _$(_files.var) = $$(addprefix $$(DESTDIR),$$($(_files.var)))$(at.nl)))
+
+_files.all = $(_files.src) $(_files.out) $(_files.sys)
+
+at.targets += $(subst *,%,$(_files.all))
+
+# Creative targets
+$(outdir)/$(files.generate): $(_files.src.gen) $(_files.src.cfg)
+$(outdir)/install: $(_files.sys.$(files.default))
+$(outdir)/installdirs: $(sort $(dir $(_files.sys)))
+$(eval \
+  $(foreach _files.g,$(files.groups),\
+    $$(outdir)/$(_files.g): $$(_files.out.$(_files.g))$(at.nl))\
+  $(foreach _files.g,$(filter-out $(files.default),$(files.groups)),\
+    $$(outdir)/install-$(_files.g): $$(_files.sys.$(_files.g)))$(at.nl))
+
+# Destructive targets
+_files.uninstall   = $(_files.sys)
+_files.mostlyclean = $(filter-out $(_files.out.slow) $(_files.out.cfg),$(_files.out))
+_files.clean       = $(filter-out                    $(_files.out.cfg),$(_files.out))
+_files.distclean   =                                                   $(_files.out)
+$(addprefix $(outdir)/,uninstall mostlyclean clean distclean): %: %-hook
+	$(RM)    -- $(sort $(filter-out %/,$(_files.$(@F))))
+	$(RM) -r -- $(sort $(filter     %/,$(_files.$(@F))))
+	$(RMDIR_P) -- $(sort $(dir $(_files.$(@F))))
+_files.maintainer-clean   = $(filter-out $(_files.src.cfg) $(_files.src.src),$(_files.src))
+_files.$(files.vcsclean)  = $(filter-out                   $(_files.src.src),$(_files.src))
+$(addprefix $(outdir)/,maintainer-clean $(files.vcsclean)): $(outdir)/%: $(outdir)/distclean $(outdir)/%-hook
+	@echo 'This command is intended for maintainers to use; it'
+	@echo 'deletes files that may need special tools to rebuild.'
+	$(RM)    -- $(sort $(filter-out %/,$(_files.$(@F))))
+	$(RM) -r -- $(sort $(filter     %/,$(_files.$(@F))))
+	$(RMDIR_P) -- $(sort $(dir $(_files.$(@F))))
+$(foreach t,uninstall mostlyclean clean distclean maintainer-clean $(files.vcsclean), $(outdir)/$t-hook)::
+.PHONY: $(foreach t,uninstall mostlyclean clean distclean maintainer-clean $(files.vcsclean), $(outdir)/$t-hook)
diff --git a/build-aux/Makefile.each.tail/10-nested.mk b/build-aux/Makefile.each.tail/10-nested.mk
new file mode 100644
index 0000000..5e5a40b
--- /dev/null
+++ b/build-aux/Makefile.each.tail/10-nested.mk
@@ -0,0 +1,20 @@
+# Copyright (C) 2016  Luke Shumaker
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+$(eval $(foreach _tmp.nested,$(nested.targets),\
+  $$(outdir)/$(_tmp.nested): $$(addsuffix /$(_tmp.nested),$$(call at.addprefix,$$(outdir),$$(nested.subdirs)))$(at.nl)))
+.PHONY: $(addprefix $(outdir)/,$(nested.targets))
+
+at.subdirs += $(nested.subdirs)
diff --git a/build-aux/Makefile.each.tail/10-std.mk b/build-aux/Makefile.each.tail/10-std.mk
deleted file mode 100644
index 693f39d..0000000
--- a/build-aux/Makefile.each.tail/10-std.mk
+++ /dev/null
@@ -1,53 +0,0 @@
-# Copyright (C) 2015-2016  Luke Shumaker
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Affero General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Affero General Public License for more details.
-#
-# You should have received a copy of the GNU Affero General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-# Add some more defaults to the *_files variables
-std.clean_files += $(std.gen_files) $(std.cfg_files) $(std.out_files)
-
-# Fix each variable at its current value to avoid any weirdness
-$(foreach c,src gen cfg out sys clean slow,$(eval std.$c_files := $$(std.$c_files)))
-
-# Make each of the standard variables relative to the correct directory
-std.src_files   := $(patsubst ./%,%,$(addprefix $(srcdir)/,$(std.src_files)))
-std.gen_files   := $(patsubst ./%,%,$(addprefix $(srcdir)/,$(std.gen_files)))
-std.cfg_files   := $(patsubst ./%,%,$(addprefix $(outdir)/,$(std.cfg_files)))
-std.out_files   := $(patsubst ./%,%,$(addprefix $(outdir)/,$(std.out_files)))
-std.sys_files   :=                  $(addprefix $(DESTDIR),$(std.sys_files))
-std.clean_files := $(patsubst ./%,%,$(addprefix $(outdir)/,$(std.clean_files)))
-std.slow_files  := $(patsubst ./%,%,$(addprefix $(outdir)/,$(std.slow_files)))
-
-# Creative targets
-$(outdir)/build      :        $(std.out_files)
-$(outdir)/install    :        $(std.sys_files)
-$(outdir)/installdirs: $(sort $(dir $(std.sys_files)))
-
-# Destructive targets
-_std.uninstall/$(outdir)        := $(std.sys_files)
-_std.mostlyclean/$(outdir)      := $(filter-out $(std.slow_files) $(std.cfg_files) $(std.gen_files) $(std.src_files),$(std.clean_files))
-_std.clean/$(outdir)            := $(filter-out                   $(std.cfg_files) $(std.gen_files) $(std.src_files),$(std.clean_files))
-_std.distclean/$(outdir)        := $(filter-out                                    $(std.gen_files) $(std.src_files),$(std.clean_files))
-_std.maintainer-clean/$(outdir) := $(filter-out                                                     $(std.src_files),$(std.clean_files))
-$(addprefix $(outdir)/,mostlyclean clean distclean maintainer-clean): %: %-hook
-	$(RM)    -- $(sort $(filter-out %/,$(_std.$(@F)/$(@D))))
-	$(RM) -r -- $(sort $(filter     %/,$(_std.$(@F)/$(@D))))
-	$(RMDIR_P) $(sort $(dir $(_std.$(@F)/$(@D)))) 2>/dev/null || $(TRUE)
-# separate uninstall to support GNU Coding Standards' NORMAL_UNINSTALL
-$(addprefix $(outdir)/,uninstall): %: %-hook
-	$(NORMAL_UNINSTALL)
-	$(RM)    -- $(sort $(filter-out %/,$(_std.$(@F)/$(@D))))
-	$(RM) -r -- $(sort $(filter     %/,$(_std.$(@F)/$(@D))))
-	$(RMDIR_P) $(sort $(dir $(_std.$(@F)/$(@D)))) 2>/dev/null || $(TRUE)
-$(foreach t,uninstall mostlyclean clean distclean maintainer-clean, $(outdir)/$t-hook)::
-.PHONY: $(foreach t,uninstall mostlyclean clean distclean maintainer-clean, $(outdir)/$t-hook)