adding more stuff for auto building releases

mobile coding is hell
its the only thing i can use though while being on vacation sob
i dont wanna stay for too long without doing shits

.github/workflows/release.yml

@@ -10,6 +10,9 @@ on:
         description: "Is this a prerelease?"
         required: true
         type: boolean
+      custom_message:
+        description: "Optional pre-changelog message"
+        required: false
 
 jobs:
   collect-release:
@@ -36,7 +39,7 @@ jobs:
           path: artifacts/windows/executable
           allow_forks: false
 
-      - name: Download macOS Full Build
+      - name: Download Mac OS Full Build
         uses: dawidd6/action-download-artifact@v6
         with:
           workflow: macos.yml
@@ -44,7 +47,7 @@ jobs:
           path: artifacts/macos/full_build
           allow_forks: false
 
-      - name: Download macOS Executable
+      - name: Download Mac OS Executable
         uses: dawidd6/action-download-artifact@v6
         with:
           workflow: macos.yml
@@ -78,7 +81,7 @@ jobs:
           zip -r ../../../renamed/"Codename Engine-Windows.zip" *
           cd -
 
-          # macOS
+          # Mac OS
           mv artifacts/macos/executable/CodenameEngine renamed/update-mac
           cd artifacts/macos/full_build
           if [ -f CodenameEngine.tar.gz ]; then
@@ -109,7 +112,7 @@ jobs:
               -L 50 -q '.[] | select(.isPrerelease==false and .isDraft==false) | .tagName' | head -n 1)
 
             if [ -z "$BASE" ]; then
-              echo "No stable release found, resorting to prereleases"
+              echo "No stable release found, resorting to prereleases."
               BASE=$(gh release list --repo ${{ github.repository }} --json tagName,isDraft \
                 -L 1 -q '.[] | select(.isDraft==false) | .tagName')
             fi
@@ -118,24 +121,59 @@ jobs:
               -L 50 -q '.[] | select(.isPrerelease==false and .isDraft==false) | .tagName' | head -n 1)
           fi
 
-          echo "Base release: $BASE"
-          echo "base_release=$BASE" >> $GITHUB_OUTPUT
+          if [ -z "$BASE" ]; then
+            echo "No older release found; please make sure to have at least one older release containing the 'update-assets.zip' file in order to generate the differences."
+            exit 1
+          else
+            echo "Base release: $BASE"
+            echo "base_release=$BASE" >> $GITHUB_OUTPUT
+          fi
 
       - name: Prepare update-assets.zip
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
-          mkdir -p update_assets_temp renamed
-          echo "Downloading assets from release ${{ steps.get_base_release.outputs.base_release }}"
-          gh release download "${{ steps.get_base_release.outputs.base_release }}" \
-            --repo ${{ github.repository }} \
-            --pattern "update-assets.zip" \
-            -D update_assets_temp
+          echo "Looking for 'update-assets.zip' from release '${{ steps.get_base_release.outputs.base_release }}'"
+          ASSETS=$(gh release view "${{ steps.get_base_release.outputs.base_release }}" \
+            --repo "${{ github.repository }}" \
+            --json assets \
+            | jq -r '.assets[].name')
 
-          unzip -q update_assets_temp/update-assets.zip -d update_assets_temp
-          cd update_assets_temp
-          zip -r ../renamed/update-assets.zip assets
-          cd ..
+          if echo "$ASSETS" | grep -xq "update-assets.zip"; then
+            mkdir -p update_assets_temp renamed
+            echo "Downloading assets from release '${{ steps.get_base_release.outputs.base_release }}'"
+            gh release download "${{ steps.get_base_release.outputs.base_release }}" \
+              --repo ${{ github.repository }} \
+              --pattern "update-assets.zip" \
+              -D update_assets_temp
+
+            unzip -q update_assets_temp/update-assets.zip -d update_assets_temp
+            cd update_assets_temp
+            zip -r ../renamed/update-assets.zip . -i assets
+          else
+            echo "No 'update-assets.zip' file found in release '${{ steps.get_base_release.outputs.base_release }}'; please make sure to have this file in that older release in order to generate the differences."
+            exit 1
+          fi
+
+      - name: Prepare pre-changelog message
+        id: pre_changelog_message
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          echo "Preparing a pre-changelog message..."
+
+          BODY="If you would like to download the full builds of the engine from this release, please ignore the files starting with 'update-' as they're needed for the engine's internal autoupdater.\n\n"
+
+          if [ -n "${{ github.event.inputs.custom_message }}" ]; then
+            BODY="${{ github.event.inputs.custom_message }}\n${BODY}"
+          fi
+
+          {
+            echo "body<<EOF"
+            echo -e "$BODY"
+            echo "EOF"
+          } >> $GITHUB_OUTPUT
+          echo -e "Final pre-changelog message:\n\n$BODY"
 
       - name: Create GitHub Release with Assets
         uses: softprops/action-gh-release@v1
@@ -146,13 +184,14 @@ jobs:
           name: Release ${{ github.event.inputs.tag_name }}
           draft: true
           prerelease: ${{ github.event.inputs.prerelease }}
+          body: ${{ steps.build_body.outputs.body }} 
           generate_release_notes: true
           files: |
             renamed/Codename Engine-Windows.zip
-            renamed/update-windows.exe
             renamed/Codename Engine-Mac.zip
             renamed/Codename Engine-Mac.tar.gz
-            renamed/update-mac
             renamed/Codename Engine-Linux.zip
-            renamed/update-linux
             renamed/update-assets.zip
+            renamed/update-windows.exe
+            renamed/update-mac
+            renamed/update-linux