multiver build

.github/workflows/build-multiver.yml

@@ -0,0 +1,57 @@
+name: build
+on: [ pull_request, push ]
+
+jobs:
+    build:
+        if: "!startsWith(github.event.head_commit.message, '[skip]')"
+        strategy:
+            matrix:
+                java: [ 17 ]
+        runs-on: ubuntu-latest
+        steps:
+
+            - name: steal code from repository
+              uses: actions/checkout@v2
+
+            - name: setup jdk ${{ matrix.java }}
+              uses: actions/setup-java@v1
+              with:
+                  java-version: ${{ matrix.java }}
+
+            - name: cache gradle
+              uses: actions/cache@v2
+              with:
+                  path: |
+                      ~/.gradle/caches
+                      ~/.gradle/loom-cache
+                      ~/.gradle/wrapper
+                  key: ${{ runner.os }}-gradle-${{ hashFiles('**/gradle-wrapper.properties') }}
+                  restore-keys: ${{ runner.os }}-gradle
+
+            - name: give gradle permission to murder github servers
+              run: chmod +x ./gradlew
+
+            - name: gradle murders github servers (1.19.2)
+              run: ./gradlew assemble -PmcVer="1.19.2"
+
+            - name: gradle murders github servers (1.20.1)
+              run: ./gradlew assemble -PmcVer="1.20.1"
+
+            - name: upload forge build artifacts
+              uses: actions/upload-artifact@v3
+              with:
+                  name: cu-artifacts-forge
+                  path: forge/build/libs/*.jar
+
+            - name: upload fabric build artifacts
+              uses: actions/upload-artifact@v3
+              with:
+                  name: cu-artifacts-fabric
+                  path: fabric/build/libs/*.jar
+
+            - name: upload merged build artifact
+              uses: actions/upload-artifact@v3
+              with:
+                  name: cu-artifacts-merged
+                  path: |
+                      build/libs/merged/*.jar