From 396953fe408a22d946a3101615462e5ad54a487c Mon Sep 17 00:00:00 2001
From: Patrick McDermott <patrick.mcdermott@libiquity.com>
Date: Tue, 05 Jan 2021 01:54:57 -0500
Subject: Initial commit

---
(limited to 'source.mk')

diff --git a/source.mk b/source.mk
new file mode 100644
index 0000000..1c6fa0a
--- /dev/null
+++ b/source.mk
@@ -0,0 +1,37 @@
+z = xz
+keys = \
+	'E1F0 36B1 FEE7 221F C778  ECEF B0B5 E886 96AF E6CB'
+
+upstream_archive = $(OPK_SOURCE)-$(OPK_SOURCE_VERSION_UPSTREAM).tar
+upstream_url = https://www.kernel.org/pub/software/scm/git/$(upstream_archive)
+source_archive = ../$(OPK_SOURCE)-$(OPK_SOURCE_VERSION_UPSTREAM).orig.tar.$(z)
+
+GNUPGHOME = gnupghome
+# TODO: When GnuPG is built with TLS support, delete the second "keyserver" line
+# to switch to a non-SKS keyserver.  We can't switch yet, because the Web server
+# at keys.openpgp.org redirects (HTTP 301) to HTTPS (and enforces it with HSTS).
+keyserver = hkps://keys.openpgp.org
+keyserver = hkp://pool.sks-keyservers.net
+keyring = ../keyring.gpg
+cleanup = gpgconf --kill all; rm -Rf '$(GNUPGHOME)'; sleep 5
+
+$(keyring):
+	gpg --recv-keys $(keys) || { rm -Rf '$@'; exit 1; }
+	rm -f '$@~'
+
+$(source_archive): $(keyring)
+	wget -c '$(upstream_url).$(z)' '$(upstream_url).sign'
+	unxz -c '$(upstream_archive).$(z)' 1>'$(upstream_archive)'
+	gpg --verify '$(upstream_archive).sign'
+	rm '$(upstream_archive)'
+	mv '$(upstream_archive).$(z)' '$(source_archive)'
+
+source:
+	install -m 0700 -d '$(GNUPGHOME)'
+	umask 0177; printf 'keyserver $(keyserver)\n' \
+		1>'$(GNUPGHOME)/dirmngr.conf'
+	umask 0177; printf 'no-default-keyring\nkeyring $(keyring)\nverbose\n' \
+		1>'$(GNUPGHOME)/gpg.conf'
+	GNUPGHOME='$(GNUPGHOME)' $(MAKE) -f ../source.mk '$(source_archive)' \
+		|| { $(cleanup); exit 1; }
+	$(cleanup)
--
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