[release-1.24] Packit: enable pre-merge copr builds

Add el8 copr build tasks via packit to check for rpm buildability.

Signed-off-by: Lokesh Mandvekar <[email protected]>

.packit.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+
+# This script handles any custom processing of the spec file using the `fix-spec-file`
+# action in .packit.yaml. These steps only work on copr builds, not on official
+# Fedora builds.
+
+set -eox pipefail
+
+PACKAGE=buildah
+
+# Set path to rpm spec file
+SPEC_FILE=rpm/$PACKAGE.spec
+
+# Get Version from HEAD
+VERSION=$(grep 'Version = ' define/types.go | cut -d\" -f2)
+
+# RPM Version can't take "-"
+RPM_VERSION=$(echo $VERSION | sed -e 's/-/~/')
+
+# Generate source tarball from HEAD
+git-archive-all -C $(git rev-parse --show-toplevel) --prefix=$PACKAGE-$VERSION/ rpm/$PACKAGE-$VERSION.tar.gz
+
+# RPM Spec modifications
+
+# Use the Version from HEAD in rpm spec
+sed -i "s/^Version:.*/Version: $RPM_VERSION/" $SPEC_FILE
+
+# Use Packit's supplied variable in the Release field in rpm spec.
+sed -i "s/^Release:.*/Release: $PACKIT_RPMSPEC_RELEASE%{?dist}/" $SPEC_FILE
+
+# Use above generated tarball as Source in rpm spec
+sed -i "s/^Source0:.*.tar.gz/Source0: $PACKAGE-$VERSION.tar.gz/g" $SPEC_FILE
+
+# Update setup macro to use the correct build dir
+sed -i "s/^%autosetup.*/%autosetup -Sgit -n %{name}-$VERSION/" $SPEC_FILE

.packit.yaml

@@ -0,0 +1,24 @@
+---
+# See the documentation for more information:
+# https://packit.dev/docs/configuration/
+
+specfile_path: rpm/buildah.spec
+
+srpm_build_deps:
+  - make
+  - git-archive-all
+
+actions:
+  fix-spec-file:
+    - "bash .packit.sh"
+
+jobs:
+  - job: copr_build
+    trigger: pull_request
+    notifications:
+      failure_comment:
+        message: "Ephemeral COPR build failed. @containers/packit-build please check."
+    enable_net: true
+    targets:
+      - epel-8-x86_64
+      - epel-8-aarch64