ci: extract setup rpmrebuild and fix rebuild (fluent#827)

RpmUnpack implementation was changed from rpm2cpio to rpm2archive, but
it can't rebuild RPM because it handles outcome of rpm2archive wrongly.
It will be fixed in rpmrebuild 2.21.

See
  rpmrebuild 2.20: rpm2archive called with incorrect arguments
  https://sourceforge.net/p/rpmrebuild/bugs/18/

Signed-off-by: Kentaro Hayashi <hayashi@clear-code.com>

Author: kenhys

fluent-package/yum/systemd-test/setup-rpmrebuild.sh

@@ -0,0 +1,28 @@
+case $distribution in
+    amazon)
+        case $version in
+            2023)
+                curl -L -o rpmrebuild.noarch.rpm https://sourceforge.net/projects/rpmrebuild/files/latest/download
+                sudo $DNF install -y ./rpmrebuild.noarch.rpm
+                ;;
+            2)
+                sudo amazon-linux-extras install -y epel
+                sudo $DNF install -y rpmrebuild
+                ;;
+        esac
+        ;;
+    *)
+        sudo $DNF install -y epel-release
+        sudo $DNF install -y rpmrebuild
+        # hotfix for rpmrebuild 2.20 bug
+        # See https://sourceforge.net/p/rpmrebuild/bugs/18/
+        pkg_version=$(rpm -q rpmrebuild)
+        case $pkg_version in
+            rpmrebuild-2.20*)
+                curl -LO https://sourceforge.net/p/rpmrebuild/bugs/18/attachment/rpmrebuild-2.20-rpm2archive-bug.patch
+                hotfix=$(realpath rpmrebuild-2.20-rpm2archive-bug.patch)
+                (cd /usr/lib/rpmrebuild && sudo patch -p2 < $hotfix)
+                ;;
+        esac
+        ;;
+esac

fluent-package/yum/systemd-test/update-to-next-version-service-status.sh

@@ -27,24 +27,8 @@ fi
 main_pid=$(eval $(systemctl show fluentd --property=MainPID) && echo $MainPID)
 
 # Make a dummy pacakge for the next version
-case $distribution in
-    amazon)
-        case $version in
-            2023)
-                curl -L -o rpmrebuild.noarch.rpm https://sourceforge.net/projects/rpmrebuild/files/latest/download
-                sudo $DNF install -y ./rpmrebuild.noarch.rpm
-                ;;
-            2)
-                sudo amazon-linux-extras install -y epel
-                sudo $DNF install -y rpmrebuild
-                ;;
-        esac
-        ;;
-    *)
-        sudo $DNF install -y epel-release
-        sudo $DNF install -y rpmrebuild
-        ;;
-esac
+. $(dirname $0)/setup-rpmrebuild.sh
+
 # Example: "1.el9"
 release=$(rpmquery --queryformat="%{Release}" -p $package)
 # Example: "1"

fluent-package/yum/systemd-test/update-to-next-version-with-auto-and-manual.sh

@@ -7,25 +7,7 @@ set -exu
 package="/host/${distribution}/${DISTRIBUTION_VERSION}/x86_64/Packages/fluent-package-[0-9]*.rpm"
 
 # Make a dummy pacakge for the next version
-case $distribution in
-    amazon)
-        case $version in
-            2023)
-                curl -L -o rpmrebuild.noarch.rpm https://sourceforge.net/projects/rpmrebuild/files/latest/download
-                sudo $DNF install -y ./rpmrebuild.noarch.rpm
-                ;;
-            2)
-                sudo amazon-linux-extras install -y epel
-                sudo $DNF install -y rpmrebuild
-                ;;
-        esac
-        ;;
-    *)
-        sudo $DNF install -y epel-release
-        sudo $DNF install -y rpmrebuild
-        ;;
-esac
-
+. $(dirname $0)/setup-rpmrebuild.sh
 
 # Example: "1.el9"
 release=$(rpmquery --queryformat="%{Release}" -p $package)

fluent-package/yum/systemd-test/update-to-next-version-with-backward-compat-for-v4.sh

@@ -38,15 +38,8 @@ sudo systemctl enable fluentd # Enable the unit name alias
 systemctl status --no-pager td-agent
 
 # Make a dummy pacakge for the next version
-case $distribution in
-    amazon)
-        sudo amazon-linux-extras install -y epel
-        ;;
-    *)
-        sudo $DNF install -y epel-release
-        ;;
-esac
-sudo $DNF install -y rpmrebuild
+. $(dirname $0)/setup-rpmrebuild.sh
+
 # Example: "1.el9"
 release=$(rpmquery --queryformat="%{Release}" -p $package)
 # Example: "1"

fluent-package/yum/systemd-test/update-to-next-version.sh

@@ -11,24 +11,8 @@ sudo systemctl enable --now fluentd
 systemctl status --no-pager fluentd
 
 # Make a dummy pacakge for the next version
-case $distribution in
-    amazon)
-        case $version in
-	    2023)
-		curl -L -o rpmrebuild.noarch.rpm https://sourceforge.net/projects/rpmrebuild/files/latest/download
-		sudo $DNF install -y ./rpmrebuild.noarch.rpm
-		;;
-	    2)
-		sudo amazon-linux-extras install -y epel
-		sudo $DNF install -y rpmrebuild
-	;;
-	esac
-        ;;
-    *)
-        sudo $DNF install -y epel-release
-	sudo $DNF install -y rpmrebuild
-        ;;
-esac
+. $(dirname $0)/setup-rpmrebuild.sh
+
 # Example: "1.el9"
 release=$(rpmquery --queryformat="%{Release}" -p $package)
 # Example: "1"