RPM spec: add conditional Python and EPEL dependencies based on RHEL version

- Added Requires for python39 and related packages on RHEL 8
- Added Requires for python3 and related packages on RHEL 9
- Added a note in %prep explaining how to manually install EPEL on RHEL 8
  in case python39-jsonschema cannot be found

Author: SiskaPavel

pkg/rpm/ipfixprobe-msec.spec.in

@@ -39,9 +39,19 @@ Requires: libatomic
 Requires: fuse3
 Requires: lz4
 Requires: openssl
+
+%if 0%{?rhel} == 8
+Requires: epel-release
+Requires: python39
+Requires: python39-pyyaml
+Requires: python39-jsonschema
+%endif
+
+%if 0%{?rhel} == 9
 Requires: python3
 Requires: python3-pyyaml
 Requires: python3-jsonschema
+%endif
 
 %description
 ipfixprobe is a network traffic analysis tool that exports IPFIX flows with extended elements via plugins.
@@ -51,6 +61,9 @@ Export timestamp in milliseconds.
 %undefine __cmake_in_source_build
 
 %prep
+# If the package python39-jsonschema cannot be found, you may need to enable EPEL manually (for epel8):
+#   sudo dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
+
 %autosetup
 
 %build

pkg/rpm/ipfixprobe-nemea.spec.in

@@ -44,9 +44,19 @@ Requires: libatomic
 Requires: fuse3
 Requires: lz4
 Requires: openssl
+
+%if 0%{?rhel} == 8
+Requires: epel-release
+Requires: python39
+Requires: python39-pyyaml
+Requires: python39-jsonschema
+%endif
+
+%if 0%{?rhel} == 9
 Requires: python3
 Requires: python3-pyyaml
 Requires: python3-jsonschema
+%endif
 
 %description
 ipfixprobe is a network traffic analysis tool that exports IPFIX flows with extended elements via plugins.
@@ -75,6 +85,9 @@ Experimental process plugins.
 %undefine __cmake_in_source_build
 
 %prep
+# If the package python39-jsonschema cannot be found, you may need to enable EPEL manually (for epel8):
+#   sudo dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
+
 %autosetup
 
 %build

pkg/rpm/ipfixprobe.spec.in

@@ -45,9 +45,19 @@ Requires: libatomic
 Requires: fuse3
 Requires: lz4
 Requires: openssl
+
+%if 0%{?rhel} == 8
+Requires: epel-release
+Requires: python39
+Requires: python39-pyyaml
+Requires: python39-jsonschema
+%endif
+
+%if 0%{?rhel} == 9
 Requires: python3
 Requires: python3-pyyaml
 Requires: python3-jsonschema
+%endif
 
 %description
 ipfixprobe is a network traffic analysis tool that exports IPFIX flows with extended elements via plugins.
@@ -96,6 +106,9 @@ Experimental process plugins.
 %undefine __cmake_in_source_build
 
 %prep
+# If the package python39-jsonschema cannot be found, you may need to enable EPEL manually (for epel8):
+#   sudo dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
+
 %autosetup
 
 %build