Add nop and source targets and keyring.

The key fingerprint is from <https://www.gnupg.org/signature_key.html>.

3 files changed, 25 insertions, 0 deletions

diff --git a/build b/build
new file mode 100755
index 0000000..2a40656
--- /dev/null
+++ b/build
@@ -0,0 +1,6 @@
+#!/usr/bin/make -f
+
+include ../source.mk
+
+nop:
+	@:
diff --git a/keyring.gpg b/keyring.gpg
new file mode 100644
index 0000000..d473acf
--- /dev/null
+++ b/keyring.gpg
diff --git a/source.mk b/source.mk
new file mode 100644
index 0000000..fc80a51
--- /dev/null
+++ b/source.mk
@@ -0,0 +1,19 @@
+upstream_archive = $(OPK_SOURCE)-$(OPK_SOURCE_VERSION_UPSTREAM).tar.bz2
+upstream_url = ftp://ftp.gnupg.org/gcrypt/$(OPK_SOURCE)/$(upstream_archive)
+source_archive = ../$(OPK_SOURCE)-$(OPK_SOURCE_VERSION_UPSTREAM).orig.tar.bz2
+keys = 'D869 2123 C406 5DEA 5E0F  3AB5 249B 39D2 4F25 E3B6'
+
+$(source_archive):
+	wget -c '$(upstream_url)'
+	set -e; if gpg --version >/dev/null 2>&1; then \
+		wget -c '$(upstream_url).sig'; \
+		[ -e ../keyring.gpg ] || \
+			gpg --keyring ../keyring.gpg --no-default-keyring \
+				--recv-keys $(keys) || true; \
+		rm -f ../keyring.gpg~; \
+		gpg --verify --keyring ../keyring.gpg \
+			'$(upstream_archive).sig'; \
+	fi
+	mv '$(upstream_archive)' '$(source_archive)'
+
+source: $(source_archive)