[CI:BUILD] Packit: Re-introduce packit with fix-spec-file action

Any new files installed by new PRs and those present in unreleased
versions of Podman will need additional manipulation of the
dist-git spec file in the files section to workaround the
`installed but unpackaged files` issue.

The fix-spec-file packit action is useful for this.

The default fix-spec-file action often has trouble guessing the correct
version from upstream code, so it would be beneficial to specify the
correct upstream version as well.

See: https://packit.dev/docs/actions/#fix-spec-file

Rename cirrus task: `Test build RPM` to
`Test build podman-next Copr RPM` for clarity.

[NO NEW TESTS NEEDED]

Signed-off-by: Lokesh Mandvekar <lsm5@fedoraproject.org>

.cirrus.yml

@@ -431,7 +431,7 @@ alt_build_task:
       - env:
             ALT_NAME: 'Build Without CGO'
       - env:
-            ALT_NAME: 'Test build RPM'
+            ALT_NAME: 'Test build podman-next Copr RPM'
       - env:
             ALT_NAME: 'Alt Arch. Cross'
     # This task cannot make use of the shared repo.tbz artifact.

.packit.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+
+# Packit's default fix-spec-file often doesn't fetch version string correctly.
+# This script handles any custom processing of the dist-git spec file and gets used by the
+# fix-spec-file action in .packit.yaml
+
+set -eo pipefail
+
+# Get Version from HEAD
+HEAD_VERSION=$(grep 'var Version = semver.MustParse' version/version.go | cut -d\" -f2 | sed -e 's/-/~/')
+
+# Generate source tarball
+git archive --prefix=podman-$HEAD_VERSION/ -o podman-$HEAD_VERSION.tar.gz HEAD
+
+# RPM Spec modifications
+
+# Fix Version
+sed -i "s/^Version:.*/Version: $HEAD_VERSION/" podman.spec
+
+# Fix Release
+sed -i "s/^Release: %autorelease/Release: $PACKIT_RPMSPEC_RELEASE%{?dist}/" podman.spec
+
+# Fix Source0
+sed -i "s/^Source0:.*.tar.gz/Source0: %{name}-$HEAD_VERSION.tar.gz/" podman.spec
+
+# Fix autosetup
+sed -i "s/^%autosetup.*/%autosetup -Sgit -n %{name}-$HEAD_VERSION/" podman.spec

.packit.yaml

@@ -0,0 +1,20 @@
+# See the documentation for more information:
+# https://packit.dev/docs/configuration/
+
+upstream_package_name: podman
+downstream_package_name: podman
+
+actions:
+  post-upstream-clone:
+    - "curl -O https://src.fedoraproject.org/rpms/podman/raw/main/f/podman.spec"
+  fix-spec-file:
+    - bash .packit.sh
+
+jobs:
+  - job: production_build
+    trigger: pull_request
+    targets: &production_dist_targets
+      - fedora-36
+      - fedora-37
+      - fedora-rawhide
+    scratch: true