Backport rpmautospec fallback macros

rpmautospec koji plugin bakes in the result of %autorelease and
%autochangelog into the SRPM. When used on a Fedora or EL 9 machine with
rpmautospec installed, fedpkg does the same. However, it's currently
impossible to rebuild specfiles that use rpmautospec on EL 8 itself due
to the unexpanded %autorelease and %autochangelog macros failing the
SRPM build.

This adds the same fallback %autorelease and %autochangelog macro
definitions that are available in the Fedora and EPEL 9 buildroots. This
allows locally rebuilding packages that use rpmautospec with plain
rpmbuild or fedpkg on an EL 8 system or with `mock --spec`.

epel-rpm-macros.spec

@@ -1,6 +1,6 @@
 Name:           epel-rpm-macros
 Version:        8
-Release:        37
+Release:        38
 Summary:        Extra Packages for Enterprise Linux RPM macros
 
 License:        GPLv2
@@ -23,6 +23,9 @@ Source24:       sysusers.generate-pre.sh
 # misc macros
 Source150:      macros.build-constraints
 Source151:      https://src.fedoraproject.org/rpms/redhat-rpm-config/raw/rawhide/f/macros.shell-completions
+# autochangelog and autorelease fallback macros
+%global rpmautospec_commit 52f3c2017e10c5ab5a183fed772e9fe8a86a20fb
+Source152:      https://pagure.io/fedora-infra/rpmautospec/raw/%{rpmautospec_commit}/f/rpm/macros.d/macros.rpmautospec
 
 BuildArch:      noarch
 Requires:       redhat-release >= %{version}
@@ -99,10 +102,13 @@ install -Dpm 644 %{SOURCE150} \
     %{buildroot}%{_rpmmacrodir}/macros.build-constraints
 install -Dpm 644 %{SOURCE151} \
     %{buildroot}%{_rpmmacrodir}/macros.shell-completions
+install -Dpm 644 %{SOURCE152} \
+    %{buildroot}%{_rpmmacrodir}/macros.rpmautospec
 
 %files
 %license GPL
 %{_rpmmacrodir}/macros.epel-rpm-macros
+%{_rpmmacrodir}/macros.rpmautospec
 %{_sysconfdir}/rpm/macros.zzz-epel-override
 %{_fileattrsdir}/pythondist.attr
 
@@ -119,6 +125,9 @@ install -Dpm 644 %{SOURCE151} \
 
 
 %changelog
+* Fri Mar 10 2023 Maxwell G <maxwell@gtmx.me> - 8-38
+- Backport rpmautospec fallback macros
+
 * Wed Feb 08 2023 Maxwell G <gotmax@e.email> - 8-37
 - Stop overriding macros that are now in RHEL 8.7
 

macros.rpmautospec

@@ -0,0 +1,16 @@
+%autorelease(e:s:pb:n) %{?-p:0.}%{lua:
+    release_number = tonumber(rpm.expand("%{?_rpmautospec_release_number}%{!?_rpmautospec_release_number:1}"));
+    base_release_number = tonumber(rpm.expand("%{?-b*}%{!?-b:1}"));
+    print(release_number + base_release_number - 1);
+}%{?-e:.%{-e*}}%{?-s:.%{-s*}}%{!?-n:%{?dist}}
+%autochangelog %{lua:
+    locale = os.setlocale(nil)
+    os.setlocale("C.utf8")
+    date = os.date("%a %b %d %Y")
+    os.setlocale(locale)
+    packager = rpm.expand("%{?packager}%{!?packager:John Doe <packager@example.com>}")
+    evr = rpm.expand("%{?epoch:%{epoch}:}%{version}-%{release}")
+    print("* " .. date .. " " .. packager .. " - " .. evr .. "\\n")
+    print("- local build")
+}
+