Add release-deb & release-rpm scripts.

These will create the apt & yum repos for the deb/rpms generated by build-deb
and build-rpm.

Adds sign-repo script which signs the repo metadata with a gpg key.

Signed-off-by: Jessica Frazelle <princess@docker.com>

hack/make/release-deb

@@ -0,0 +1,68 @@
+#!/bin/bash
+set -e
+
+# This script creates the apt repos for the .deb files generated by hack/make/build-deb
+#
+# The following can then be used as apt sources:
+# 	deb http://apt.dockerproject.org/repo $distro-$release $version
+#
+# For example:
+#	deb http://apt.dockerproject.org/repo ubuntu-trusy main
+#	deb http://apt.dockerproject.org/repo ubuntu-vivid testing
+#	deb http://apt.dockerproject.org/repo debian-wheezy experimental
+#	deb http://apt.dockerproject.org/repo debian-jessie main
+#
+# ... and so on and so forth for the builds created by hack/make/build-deb
+
+: ${DOCKER_RELEASE_DIR:=$DEST}
+APTDIR=$DOCKER_RELEASE_DIR/apt/repo
+
+# setup the apt repo (if it does not exist)
+mkdir -p "$APTDIR/conf" "$APTDIR/db"
+
+# create/update distributions file
+for suite in $(exec contrib/reprepro/suites.sh); do
+	cat <<-EOF
+	Origin: Docker
+	Suite: $suite
+	Codename: $suite
+	Architectures: amd64 i386
+	Components: main testing experimental
+	Description: Docker APT Repository
+
+	EOF
+done > "$APTDIR/conf/distributions"
+
+# set the component and priority for the version being released
+component="main"
+priority=700
+
+if [[ "$VERSION" == *-rc* ]]; then
+	component="testing"
+	priority=650
+fi
+
+if [ $DOCKER_EXPERIMENTAL ] || [[ "$VERSION" == *-dev ]] || [ -n "$(git status --porcelain)" ]; then
+	component="experimental"
+	priority=600
+fi
+
+# release the debs
+for dir in contrib/builder/deb/*/; do
+	version="$(basename "$dir")"
+	codename="${version//debootstrap-}"
+
+	# add the deb for each component for the distro version with reprepro
+	DEBFILE=( "bundles/$VERSION/build-deb/$version/docker-engine"*.deb )
+
+	# if we have a $GPG_PASSPHRASE we may as well
+	# dpkg-sign before reprepro
+	if [ ! -z "$GPG_PASSPHRASE" ]; then
+		dpkg-sig -g "--passphrase $GPG_PASSPHRASE" \
+			-k releasedocker --sign builder "${DEBFILE[@]}"
+	fi
+
+	reprepro -v --keepunreferencedfiles \
+		-S docker-engine -P "$priority" -C "$component" \
+		-b "$APTDIR" includedeb "$codename" "${DEBFILE[@]}"
+done