From 981af15f206c5791218256d6a663961b5a94e315 Mon Sep 17 00:00:00 2001
From: Patrick McDermott <patrick.mcdermott@libiquity.com>
Date: Wed, 09 Dec 2020 17:25:51 -0500
Subject: Revert "source.mk: Remove (BusyBox lzip support is broken apparently)"

This reverts commit e2f8112ed95c899578396d00a49c5d30de7ffa2a.
---
diff --git a/build b/build
index 4bc43d5..b77adc9 100755
--- a/build
+++ b/build
@@ -1,5 +1,7 @@
 #!/usr/bin/make -f
 
+include ../source.mk
+
 TABLES = \
 	africa \
 	antarctica \
diff --git a/source.mk b/source.mk
new file mode 100644
index 0000000..4e32c18
--- /dev/null
+++ b/source.mk
@@ -0,0 +1,26 @@
+# The merged tzdb archive now has a top-level directory as opkbuild requires.
+
+upstream_archive = $(OPK_SOURCE)-$(OPK_SOURCE_VERSION_UPSTREAM).tar.lz
+upstream_url_base = http://data.iana.org/time-zones/releases
+upstream_url = $(upstream_url_base)/$(upstream_archive)
+source_archive = ../$(OPK_SOURCE)-$(OPK_SOURCE_VERSION_UPSTREAM).orig.tar.lz
+
+gpg = GNUPGHOME=gnupghome/ gpg --no-default-keyring --keyring ../keyring.gpg
+keys = \
+	'7E37 92A9 D8AC F7D6 33BC  1588 ED97 E90E 62AA 7E34'
+
+$(source_archive):
+	wget -c '$(upstream_url)' '$(upstream_url).asc'
+	install -m 0700 -d gnupghome/
+	[ -e ../keyring.gpg ] || \
+		$(gpg) --keyserver hkp://pool.sks-keyservers.net \
+			--recv-keys $(keys); \
+	rm -f ../keyring.gpg~; \
+	if ! $(gpg) --verify '$(upstream_archive).asc'; then \
+		rm -Rf gnupghome/; \
+		exit 1; \
+	fi
+	rm -Rf gnupghome/
+	mv '$(upstream_archive)' '$(source_archive)'
+
+source: $(source_archive)
--
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