From 00367bc4b7a0ede6fac7b3ae74305d834cf65bde Mon Sep 17 00:00:00 2001
From: Alejandro Colomar <alx@kernel.org>
Date: Tue, 6 Feb 2024 20:38:26 +0100
Subject: share/mk/: dist: Add target to create distribution tarballs

Signed-off-by: Alejandro Colomar <alx@kernel.org>
---
 share/mk/compress.mk | 42 +++++++++++++++++++++++
 share/mk/dist.mk     | 96 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 share/mk/version.mk  |  3 +-
 3 files changed, 140 insertions(+), 1 deletion(-)
 create mode 100644 share/mk/compress.mk
 create mode 100644 share/mk/dist.mk

diff --git a/share/mk/compress.mk b/share/mk/compress.mk
new file mode 100644
index 0000000..4ebad5d
--- /dev/null
+++ b/share/mk/compress.mk
@@ -0,0 +1,42 @@
+# Copyright 2023-2024 Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: LGPL-3.0-only WITH LGPL-3.0-linking-exception
+
+
+ifndef MAKEFILE_COMPRESS_INCLUDED
+MAKEFILE_COMPRESS_INCLUDED := 1
+
+
+Z :=
+ifeq ($(Z),)
+else ifeq ($(Z),.bz2)
+else ifeq ($(Z),.gz)
+else ifeq ($(Z),.lz)
+else ifeq ($(Z),.xz)
+else
+$(warning "Z": "$(Z)")
+$(error Valid values for "Z": ["", ".bz2", ".gz", ".lz", ".xz"])
+endif
+
+
+DEFAULT_BZIP2FLAGS :=
+EXTRA_BZIP2FLAGS   :=
+BZIP2FLAGS         := $(DEFAULT_BZIP2FLAGS) $(EXTRA_BZIP2FLAGS)
+BZIP2              := bzip2
+
+DEFAULT_GZIPFLAGS  := -n
+EXTRA_GZIPFLAGS    :=
+GZIPFLAGS          := $(DEFAULT_GZIPFLAGS) $(EXTRA_GZIPFLAGS)
+GZIP               := gzip
+
+DEFAULT_LZIPFLAGS  :=
+EXTRA_LZIPFLAGS    :=
+LZIPFLAGS          := $(DEFAULT_LZIPFLAGS) $(EXTRA_LZIPFLAGS)
+LZIP               := lzip
+
+DEFAULT_XZFLAGS    :=
+EXTRA_XZFLAGS      :=
+XZFLAGS            := $(DEFAULT_XZFLAGS) $(EXTRA_XZFLAGS)
+XZ                 := xz
+
+
+endif  # include guard
diff --git a/share/mk/dist.mk b/share/mk/dist.mk
new file mode 100644
index 0000000..0d9325f
--- /dev/null
+++ b/share/mk/dist.mk
@@ -0,0 +1,96 @@
+# Copyright 2021-2024 Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: LGPL-3.0-only WITH LGPL-3.0-linking-exception
+
+
+ifndef MAKEFILE_DIST_INCLUDED
+MAKEFILE_DIST_INCLUDED := 1
+
+
+include $(MAKEFILEDIR)/build.mk
+include $(MAKEFILEDIR)/cmd.mk
+include $(MAKEFILEDIR)/compress.mk
+include $(MAKEFILEDIR)/install.mk
+include $(MAKEFILEDIR)/version.mk
+include $(MAKEFILEDIR)/verbose.mk
+
+
+_DISTDIR := $(builddir)/dist
+
+
+DEFAULT_TARFLAGS := \
+	--sort=name \
+	--owner=root:0 \
+	--group=root:0 \
+	--mtime='$(DISTDATE)'
+EXTRA_TARFLAGS   :=
+TARFLAGS         := $(DEFAULT_TARFLAGS) $(EXTRA_TARFLAGS)
+TAR              := tar
+
+
+DISTFILES   := $(shell $(GIT) ls-files $(HIDE_ERR) \
+			| $(SED) 's,^,$(srcdir)/,' \
+			| $(SED) 's,:,\\:,g')
+_DISTFILES  := $(patsubst $(srcdir)/%,$(_DISTDIR)/%,$(DISTFILES))
+_DISTPAGES  := $(filter     $(_DISTDIR)/share/man/man%,$(_DISTFILES))
+_DISTOTHERS := $(filter-out $(_DISTDIR)/share/man/man%,$(_DISTFILES))
+
+DISTFILE    := $(builddir)/$(DISTNAME).tar
+compression := bz2 gz lz xz
+
+
+$(builddir)/dist/:
+	+$(info INSTALL	$@)
+	+$(INSTALL_DIR) $@
+
+
+$(builddir)/dist/%/: | $(builddir)/dist/
+	+$(info INSTALL	$@)
+	+$(INSTALL_DIR) $@
+
+
+$(_DISTPAGES): $(_DISTDIR)/share/man/man%: $(srcdir)/share/man/man% $(MK) | $$(@D)/
+	$(info INSTALL	$@)
+	<$< \
+	$(SED) "/^.TH/s/(date)/$$(git log --format=%cs -1 -- $< $(HIDE_ERR))/" \
+	| $(SED) '/^.TH/s/(unreleased)/$(DISTVERSION)/' \
+	| $(INSTALL_DATA) -T /dev/stdin $@
+
+$(_DISTOTHERS): $(_DISTDIR)/%: $(srcdir)/% $(MK) | $$(@D)/
+	$(info CP	$@)
+	$(CP) -dT $< $@
+
+
+$(DISTFILE): $(_DISTFILES) $(MK) | $$(@D)/
+	$(info TAR	$@)
+	$(TAR) $(TARFLAGS) -cf $@ -T /dev/null
+	$(GIT) ls-files \
+	| $(SED) 's,^,$(_DISTDIR)/,' \
+	| $(XARGS) $(TAR) $(TARFLAGS) -rf $@ -C $(srcdir) \
+		--transform 's,^$(_DISTDIR),$(DISTNAME),'
+
+define DISTFILE_z_rule
+$(DISTFILE).$(2): %.$(2): % $(MK) | $$$$(@D)/
+	$$(info	$(1)	$$@)
+	$($(1)) $($(1)FLAGS) -kf $$<
+	touch $$@
+endef
+
+$(eval $(call DISTFILE_z_rule,BZIP2,bz2))
+$(eval $(call DISTFILE_z_rule,GZIP,gz))
+$(eval $(call DISTFILE_z_rule,LZIP,lz))
+$(eval $(call DISTFILE_z_rule,XZ,xz))
+
+
+.PHONY: dist-tar
+dist-tar: $(DISTFILE);
+
+
+$(foreach z, $(compression),                                                  \
+	$(eval .PHONY: dist-$(z)))
+$(foreach z, $(compression),                                                  \
+	$(eval dist-$(z): $(DISTFILE).$(z);))
+.PHONY: dist
+dist: $(foreach z, $(compression), dist-$(z));
+
+
+endif  # include guard
diff --git a/share/mk/version.mk b/share/mk/version.mk
index ea26a57..f32265a 100644
--- a/share/mk/version.mk
+++ b/share/mk/version.mk
@@ -11,8 +11,9 @@ include $(MAKEFILEDIR)/verbose.mk
 
 
 libname       := liba2i
-DISTVERSION   := $(patsubst v%,%,$(shell $(GIT) describe $(HIDE_ERR) || $(ECHO) unreleased))
+DISTVERSION   := $(shell $(GIT) describe $(HIDE_ERR))
 DISTNAME      := $(libname)-$(DISTVERSION)
+DISTDATE      := $(shell $(GIT) log -1 --format='%aD')
 MAJOR_VERSION := $(shell $(ECHO) $(DISTVERSION) | $(CUT) -f1 -d. )
 
 
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