From 595fe32e7680e75bca74addff27471138cfeb139 Mon Sep 17 00:00:00 2001
From: Arun Isaac
Date: Wed, 11 Jan 2023 23:29:29 +0000
Subject: Makefile: Add release tarball generation rules.

* Makefile (version, GIT, GPG, LZIP, distribute_files, dist_archive):
New variables.
(dist, $(dist_archive), %.asc): New rules.
(.PHONY): Add dist.
---
 Makefile | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 979c4f1..cc69eed 100644
--- a/Makefile
+++ b/Makefile
@@ -18,12 +18,16 @@
 # <http://www.gnu.org/licenses/>.
 
 project = guile-email
+version = $(subst v,,$(shell git describe --abbrev=0))
 # FIXME: Do not hardcode the effective version.
 guile_effective_version = 3.0
 
 EMACS ?= emacs
+GIT ?= git
+GPG ?= gpg
 GUILD ?= guild
 GUILE ?= guile
+LZIP ?= lzip
 MAKEINFO ?= makeinfo
 
 prefix ?= /usr/local
@@ -39,11 +43,15 @@ tests = $(wildcard tests/*.scm)
 doc_texi = doc/$(project).texi
 doc_html = $(doc_texi:.texi=.html)
 doc_info = $(doc_texi:.texi=.info)
+distribute_files = $(sources) tests $(doc_texi) \
+		   build-aux/test-driver.scm \
+		   COPYING NEWS README.org \
+		   guix.scm Makefile
 
 scmdir = $(datarootdir)/guile/site/$(guile_effective_version)
 godir = $(libdir)/guile/$(guile_effective_version)/site-ccache
 
-.PHONY: all check install clean
+.PHONY: all check install clean dist
 
 all: $(objects)
 
@@ -70,6 +78,17 @@ website/manual/dev/en: $(doc_html)
 check: $(tests)
 	$(GUILE) --no-auto-compile -L . build-aux/test-driver.scm $^
 
+dist_archive = $(project)-$(version).tar.lz
+
+dist: $(dist_archive) $(dist_archive).asc
+
+$(dist_archive): .git/refs/heads/master
+	$(GIT) archive --prefix $(basename $(basename $@))/ --format=tar master $(distribute_files) \
+		| $(LZIP) --force --output $@
+
+%.asc: %
+	$(GPG) --detach-sign --armor $<
+
 install: $(doc_info)
 	mkdir -p $(scmdir) $(godir)
 	cp --parents -vr $(sources) $(scmdir)
-- 
cgit v1.2.3