Add packit config for Fedora copr builds

Builds are triggered by commits to master branch and by pull requests

.github/workflows/pr-welcome-msg.yml

@@ -23,6 +23,7 @@ jobs:
             If you want to re-run tests or request review, you can use following commands as a comment:
             - **leapp-ci build** to run copr build and e2e tests in **OAMG CI**
             - **review please** to notify leapp developers of review request
+            - **/packit copr-build** to submit a public copr build using packit
 
             Please [open ticket](https://url.corp.redhat.com/oamg-ci-issue) in case you experience technical problem with the CI. (RH internal only)
 

.packit.yaml

@@ -0,0 +1,42 @@
+specfile_path: packaging/leapp.spec
+
+upstream_project_url: https://github.com/oamg/leapp
+
+jobs:
+- job: copr_build
+  trigger: pull_request
+  metadata:
+    owner: "@oamg"
+    project: leapp
+    targets:
+    - epel-7-ppc64le
+    - epel-7-x86_64
+    - epel-8-x86_64
+    - fedora-all-aarch64
+    - fedora-all-x86_64
+  actions:
+    post-upstream-clone:
+    # builds from PRs should have lower NVR than those from master branch
+    - sed -i "s/1%{?dist}/0%{?dist}/g" packaging/leapp.spec
+    get-current-version:
+    # get version from spec file instead from git tag
+    - bash -c "grep -m1 '^Version:' packaging/leapp.spec | grep -om1 '[0-9].[0-9.]**'"
+- job: copr_build
+  trigger: commit
+  metadata:
+    branch: master
+    owner: "@oamg"
+    project: leapp
+    targets:
+    - epel-7-ppc64le
+    - epel-7-x86_64
+    - epel-8-x86_64
+    - fedora-all-aarch64
+    - fedora-all-x86_64
+  actions:
+    post-upstream-clone:
+    # builds from master branch should have the highest NVR
+    - sed -i "s/1%{?dist}/100%{?dist}/g" packaging/leapp.spec
+    get-current-version:
+    # get version from spec file instead from git tag
+    - bash -c "grep -m1 '^Version:' packaging/leapp.spec | grep -om1 '[0-9].[0-9.]**'"