misc: Specific mkosi fixes for centos-7

Seems we need golang from epel, to mask out the old git version, and to
workaround mkosi bugs.

misc/make-deps.sh

@@ -76,7 +76,7 @@ fi
 if [ $travis -eq 0 ]; then
 	if [ ! -z "$YUM" ]; then
 		if [ -z "$GO" ]; then
-			$sudo_command $YUM install -y golang golang-googlecode-tools-stringer
+			$sudo_command $YUM install -y golang golang-googlecode-tools-stringer || $sudo_command $YUM install -y golang-bin # centos-7 epel
 		fi
 		# some go dependencies are stored in mercurial
 		$sudo_command $YUM install -y hg

misc/make-rpm-changelog.sh

@@ -15,6 +15,20 @@ if [ ! -d "$dir" ]; then
 	echo "changelog dir ($dir) does not exist"
 	exit 1
 fi
+
+if [ "$DISTRO" = "centos-7" ]; then
+	# FIXME: This will fail *inside* a build running on CentOS-7, until we
+	# improve the below script to work when we have an old version of git!
+	# Build a "fake" (temporary) changelog so that fpm doesn't fail.
+	echo "" > "$CHANGELOG"
+	echo "* $(date '+%a %b %d %Y') James Shubin <james@shubin.ca> ${VERSION}" >> "$CHANGELOG"
+	echo "" >> "$CHANGELOG"
+	echo " - James Shubin (1):" >> "$CHANGELOG"
+	echo "      Latest release of mgmt" >> "$CHANGELOG"
+	echo "" >> "$CHANGELOG"
+	exit 0	# `git tag` isn't new enough on centos-7, skip this here
+fi
+
 # input to format flag for git tag
 TAG_FORMAT="* %(creatordate:format:%a %b %d %Y) %(creator) %(refname:lstrip=2)"
 # a list of tags to be parsed in the loop

misc/mkosi/mkosi.default.centos-7

@@ -1,11 +1,13 @@
 [Distribution]
-Distribution=centos
+Distribution=centos_epel
 Release=7
 
 [Output]
 Format=raw_btrfs
 #Format=gpt_btrfs
-Bootable=yes
+# Bootable must be no or else systemd-udev package will be installed (some bug)
+# TODO: https://github.com/systemd/mkosi/issues/356
+Bootable=no
 
 # This can be a ramdisk to improve performance.
 OutputDirectory=mkosi.output
@@ -20,17 +22,17 @@ WithNetwork=true
 
 # The packages to appear in both the build and the final image.
 Packages=
-	dnf
+	yum
+	rpm-build
 	make
 	git
-	golang
 	tree
 # The packages to appear in the build image, but absent from the final image.
 #BuildPackages=
-#	dnf
+#	yum
+#	rpm-build
 #	make
 #	git
-#	golang
 #	tree
 
 # Store our build artifacts here. This makes them accessible to the outside.