First checks for new releases.

It's annoying that reprepro includedeb fails if there is an existing release. If we're fixing that, we might as well not build if there is no need.

.github/workflows/main.yml

@@ -13,19 +13,21 @@ on:
   workflow_dispatch:
 
 jobs:
-  build-deb:
-    name: Build DEB Packages
+  check-upstream:
+    name: Check for a new releases upstream
     runs-on: ubuntu-latest
 
     outputs:
-      innernet_release: ${{ steps.download-release.outputs.innernet_release }}
+      innernet_release: ${{ steps.check-latest-release.outputs.innernet_release }}
+      tarball_url: ${{ steps.check-latest-release.outputs.tarball_url }}
+      new_release_exists: ${{ steps.check-repo-release.outputs.new_release_exists }}
       
     steps:
       - name: Install Distro Dependencies
-        run: sudo env DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends --yes dpkg-dev jq liblzma-dev
+        run: sudo env DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends --yes jq liblzma-dev reprepro
 
-      - name: Download Latest Release
-        id: download-release
+      - name: Check Latest Release
+        id: check-latest-release
         run: |
           wget -O- \
                -H'Accept: application/json' \
@@ -34,10 +36,35 @@ jobs:
               | (
                 read release tarball_url
                 echo "innernet_release=$release" >>"$GITHUB_OUTPUT"
-                wget -O- "$tarball_url" | tar xz
+                echo "tarball_url=$tarball_url" >>"$GITHUB_OUTPUT"
+              )
+
+      - name: Check Repo Release
+        id: check-repo-release
+        run: |
+          indexed=$(reprepro --list-format '${version}\n' listmatched unstable innernet)
+          if [ "x$indexed" = "x${{ steps.check-latest-release.outputs.innernet_release }}" ]; then
+            echo "new_release_exists=false" >>"$GITHUB_OUTPUT"
+          else
+            echo "new_release_exists=true" >>"$GITHUB_OUTPUT"
+          fi
+
+  build-deb:
+    name: Build DEB Packages
+    runs-on: ubuntu-latest
+    needs: [check-upstream]
+    if: ${{ needs.check-upstream.outputs.new_release_exists == 'true' }}
+
+    steps:
+      - name: Install Distro Dependencies
+        run: sudo env DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends --yes dpkg-dev liblzma-dev
+
+      - name: Download Latest Release
+        id: download-release
+        run: |
+          wget -O- "${{ needs.check-upstream.outputs.tarball_url }}" | tar xz
           mv tonarino-innernet-*/* .
           rm -fr tonarino-innernet-*
-              )
 
       - name: Install Rust
         uses: actions-rs/toolchain@v1
@@ -73,7 +100,8 @@ jobs:
           
   release:
     runs-on: ubuntu-latest
-    needs: [build-deb]
+    needs: [check-upstream, build-deb]
+    if: ${{ needs.check-upstream.outputs.new_release_exists == 'true' }}
 
     steps:
       - name: Install Distro Dependencies
@@ -124,7 +152,7 @@ jobs:
               git \
                   -c 'user.email=41898282+github-actions[bot]@users.noreply.github.com' \
                   -c 'user.name=github-actions[bot]' \
-                  commit -m "Included release tonarino/innernet@${{ needs.build-deb.outputs.innernet_release }}."
+                  commit -m "Included release tonarino/innernet@${{ needs.check-upstream.outputs.innernet_release }}."
           else
               echo 'No updates to commit.'
           fi