chore: workflow to upload only modified files

There was issues relating to file permissions when it came to building
RPM files. I've changed it around so it now only uploads the artifact
files that were modified, so we always checkout the repo but keep the
modified files when we build a release

.github/workflows/build-rpm.yml

@@ -12,11 +12,11 @@ on:
       tag:
         description: "Custom tag for release, e.g. v1.2.3-1234"
         required: false
-        default: ""
+        default: "v0.0.0"
 
 env:
-  REGISTRY_USER: ${{ github.actor }}
-  REGISTRY_PASSWORD: ${{ github.token }}
+  REGISTRY_USER: ${{ github.repository_owner }}
+  REGISTRY_PASSWORD: ${{ secrets.GITHUB_TOKEN }}
   IMAGE_REGISTRY: ghcr.io/${{ github.repository_owner }}
 
 jobs:
@@ -36,31 +36,34 @@ jobs:
           default: ${{ github.event.inputs.tag }} # Optional: Default version when tag not found
 
       - name: Update specfile to match tag
-        if: ${{ github.event_name != 'release' || steps.tag.outputs.tag != '' }}
+        if: ${{ github.event_name != 'release' && steps.tag.outputs.tag != '0.0.0' }}
         uses: jacobtomlinson/gha-find-replace@v3
         with:
           include: "packaging/convert2rhel.spec"
           find: "(Version: +).*"
           replace: "${1}${{steps.tag.outputs.tag}}"
 
       - name: Update convert2rhel version to match tag
-        if: ${{ github.event_name != 'release' || steps.tag.outputs.tag != '' }}
+        if: ${{ github.event_name != 'release' && steps.tag.outputs.tag != '0.0.0' }}
         uses: jacobtomlinson/gha-find-replace@v3
         with:
           include: "convert2rhel/__init__.py"
           find: "(__version__ += +).*"
-          replace: '${1}\"${{steps.tag.outputs.tag}}\"'
+          replace: '${1}"${{steps.tag.outputs.tag}}"'
 
-      - uses: actions/upload-artifact@v4
+      - name: Upload changed files
+        uses: actions/upload-artifact@v4
         with:
           name: github-repo
-          path: "."
+          path: |
+            packaging/convert2rhel.spec
+            convert2rhel/__init__.py
           retention-days: 1
 
   build_rpms:
     needs:
       - setup_version
-    name: Build EL${{ matrix.el.ver }} RPM
+    name: Build RPM
     strategy:
       fail-fast: false
       matrix:
@@ -70,7 +73,11 @@ jobs:
           - ver: 9
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/download-artifact@v4
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Download changed files
+        uses: actions/download-artifact@v4
         with:
           name: github-repo
 
@@ -88,6 +95,7 @@ jobs:
           make rpm${{ matrix.el.ver }}
 
       - uses: shogo82148/actions-upload-release-asset@v1
+        if: ${{ github.event.release.upload_url }}
         with:
           upload_url: ${{ github.event.release.upload_url }}
           asset_path: .rpms/*el${{ matrix.el.ver }}*