Made ci bit smaller

.gitlab-ci.yml

@@ -1,6 +1,6 @@
 # use Eclipse's JDK
 image: gradle:eclipse-temurin
-# The ci should always use an unix/unix-like OS to work
+# The ci should always use a unix(-like) OS to work
 
 
 # all stages need to be defined here
@@ -14,18 +14,26 @@ stages:
   - pages
 
 variables:
-    # Pull core when building
-    GIT_SUBMODULE_STRATEGY: recursive
+  # Pull core when building
+  GIT_SUBMODULE_STRATEGY: recursive
 
 
-# This can be extended so code is a bit less duplicated
+# These can be extended so code is a bit less duplicated
+.build_java:
+  image: eclipse-temurin:17
+  cache:
+    key: "gradleCache"
+    policy: pull-push
+    paths:
+      - .gradle
+      - cache/
+  allow_failure: true
 .build_mc:
   script:
     # this both runs the unit tests and assembles the code
     - ./gradlew clean -PmcVer="${MC_VER}" --gradle-user-home cache/;
     - ./gradlew build -PmcVer="${MC_VER}" --gradle-user-home cache/;
     - ./gradlew mergeJars -PmcVer="${MC_VER}" --gradle-user-home cache/;
-  image: eclipse-temurin:17
   artifacts:
     name: "NightlyBuild_${MC_VER}-${CI_COMMIT_SHORT_SHA}-${CI_COMMIT_TIMESTAMP}"
     paths:
@@ -43,13 +51,7 @@ variables:
       - quilt/build/libs/*-sources.jar
     expire_in: 1 day
     when: always
-  cache:
-    key: "gradleCache"
-    policy: pull-push
-    paths:
-      - .gradle
-      - cache/
-  allow_failure: true
+  extends: .build_java
 
 
 # 1.18.2 build
@@ -92,7 +94,6 @@ api:
     # this also runs unit tests
     - ./gradlew api:build --gradle-user-home cache/;
     - ./gradlew api:addSourcesToCompiledJar --gradle-user-home cache/;
-  image: eclipse-temurin:17
   artifacts:
     name: "Api_NightlyBuild-${CI_COMMIT_SHORT_SHA}-${CI_COMMIT_TIMESTAMP}"
     paths:
@@ -104,13 +105,7 @@ api:
       - coreSubProjects/api/build/libs/merged/*-sources.jar
     expire_in: 1 day
     when: always
-  cache:
-    key: "gradleCache"
-    policy: pull-push
-    paths:
-      - .gradle
-      - cache/
-  allow_failure: true
+  extends: .build_java
 
 
 # generate and publish API javadocs
@@ -124,17 +119,11 @@ pages:
     - ./gradlew api:javadoc --gradle-user-home cache/;
     - mkdir public
     - cp -r $CI_PROJECT_DIR/coreSubProjects/api/build/docs/javadoc/. public
-  image: eclipse-temurin:17
   artifacts:
     paths:
       - public
-  cache:
-    key: "gradleCache"
-    policy: pull-push
-    paths:
-      - .gradle
-      - cache/
   allow_failure: false
+  extends: .build_java