Packit: custom action for copr rpm builds

The COPR rpm builds done by packit fetch version using `git describe`.
But this is a problem for the upgrade path from older copr builds
because currently `git describe` fails on the monorepo.

This commit adds a custom build script that sets rpm version from
`common/version/version.go` .

This will only affect COPR rpms and not official distro rpms.
Similar action has been enabled on other projects already.

Ref: https://github.com/containers/netavark/blob/main/.packit-copr-rpm.sh

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

Author: lsm5

.packit-copr-rpm.sh

@@ -0,0 +1,33 @@
+#!/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 -uexo pipefail
+
+PACKAGE="containers-common"
+SPEC_FILE=common/rpm/"$PACKAGE".spec
+
+# Get Version from HEAD
+VERSION=$(grep '^const Version' common/version/version.go | cut -d\" -f2)
+
+# RPM Version can't take "-"
+RPM_VERSION="${VERSION//-/\~}"
+
+# Generate source tarball from HEAD
+git-archive-all -C "$(git rev-parse --show-toplevel)" --prefix="$PACKAGE"-"$VERSION"/ common/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/" $SPEC_FILE
+
+# Update setup macro to use the correct build dir
+sed -i "s/^%autosetup.*/%autosetup -Sgit -n %{name}-$VERSION/" "$SPEC_FILE"

.packit.yaml

@@ -17,6 +17,15 @@ packages:
     downstream_package_name: containers-common
     specfile_path: common/rpm/containers-common.spec
 
+srpm_build_deps:
+  - git-archive-all
+  - make
+
+# https://packit.dev/docs/configuration/actions
+# fix-spec-file only operates on copr builds and doesn't affect official distro builds
+actions:
+  fix-spec-file: "bash .packit-copr-rpm.sh"
+
 jobs:
   - job: copr_build
     trigger: pull_request