Fix Publishing to the Downloads API (#499)

* Update build process

* Ensure BUILD_JSON env is init

* Fallback to GH run number

* Use tmp file for metadata.json

Signed-off-by: Joshua Castle <26531652+Kas-tle@users.noreply.github.com>

---------

Signed-off-by: Joshua Castle <26531652+Kas-tle@users.noreply.github.com>

.github/workflows/pullrequest.yml

@@ -8,38 +8,55 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+      - name: Set Build Number
+        run: |
+          echo "BUILD_NUMBER=${GITHUB_RUN_NUMBER}" >> $GITHUB_ENV
+
       - name: Checkout repository and submodules
-        uses: actions/checkout@v3
+        # See https://github.com/actions/checkout/commits
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
           submodules: recursive
 
-      - name: Set up JDK 17
-        uses: actions/setup-java@v2
-        with:
-          distribution: 'temurin'
-          java-version: '17'
-          cache: 'gradle'
+      - name: Validate Gradle Wrapper
+        # See https://github.com/gradle/wrapper-validation-action/commits
+        uses: gradle/wrapper-validation-action@699bb18358f12c5b78b37bb0111d3a0e2276e0e2 # v2.1.1
 
-      - name: Build
-        run: ./gradlew build
+      - name: Set up JDK 17
+        # See https://github.com/actions/setup-java/commits
+        uses: actions/setup-java@387ac29b308b003ca37ba93a6cab5eb57c8f5f93 # v4.0.0
+        with:
+          java-version: 17
+          distribution: temurin
+
+      - name: Build Floodgate
+        # See https://github.com/gradle/actions/commits
+        uses: gradle/actions/setup-gradle@417ae3ccd767c252f5661f1ace9f835f9654f2b5 # v3.1.0
+        with:
+          arguments: build
+          cache-read-only: true
 
       - name: Archive artifacts (Floodgate Bungee)
-        uses: actions/upload-artifact@v2
+        # See https://github.com/actions/upload-artifact/commits
+        uses: actions/upload-artifact@5d5d22a31266ced268874388b861e4b58bb5c2f3 # v4.3.1
         if: success()
         with:
           name: Floodgate Bungee
           path: bungee/build/libs/floodgate-bungee.jar
+          if-no-files-found: error
 
       - name: Archive artifacts (Floodgate Spigot)
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@5d5d22a31266ced268874388b861e4b58bb5c2f3
         if: success()
         with:
           name: Floodgate Spigot
           path: spigot/build/libs/floodgate-spigot.jar
+          if-no-files-found: error
 
       - name: Archive artifacts (Floodgate Velocity)
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@5d5d22a31266ced268874388b861e4b58bb5c2f3
         if: success()
         with:
           name: Floodgate Velocity
           path: velocity/build/libs/floodgate-velocity.jar
+          if-no-files-found: error