Raise the minimum Java version to 17 (#6905)

Require Java 17

Co-authored-by: sovdee <[email protected]>

.github/workflows/java-17-builds.yml

@@ -1,4 +1,4 @@
-name: Java 17 CI (MC 1.17-1.20.4)
+name: Java 17 CI (MC 1.19.4-1.20.4)
 
 on:
     push:

.github/workflows/junit-17-builds.yml

@@ -1,4 +1,4 @@
-name: JUnit (MC 1.17-1.20.4)
+name: JUnit (MC 1.19.4-1.20.4)
 
 on:
     push:

README.md

@@ -16,8 +16,8 @@ Skript requires **Spigot** to work. You heard it right, **CraftBukkit** does *no
 **Paper**, which is a fork of Spigot, is recommended; it is required for some
 parts of Skript to be available.
 
-Skript supports only the **latest** patch versions of Minecraft 1.13+.
-For example, this means that 1.16.5 is supported, but 1.16.4 is *not*.
+Skript supports only the **latest** patch versions of Minecraft 1.19 and newer.
+For example, this means that 1.19.4 is supported, but 1.19.3 is *not*.
 Testing with all old patch versions is not feasible for us.
 
 Minecraft 1.12 and earlier are not, and will not be supported. New Minecraft
@@ -77,15 +77,14 @@ Skript has some tests written in Skript. Running them requires a Minecraft
 server, but our build script will create one for you. Running the tests is easy:
 
 ```
-./gradlew (quickTest|skriptTest|skriptTestJava11|skriptTestJava17|skriptTestJava21)
+./gradlew (quickTest|skriptTest|skriptTestJava17|skriptTestJava21)
 ```
 
 <code>quickTest</code> runs the test suite on newest supported server version.
 <code>skriptTestJava21</code> (1.20.6+) runs the tests on Java 21 supported versions.
-<code>skriptTestJava17</code> (1.17-1.20.4) runs the tests on Java 17 supported versions.
-<code>skriptTestJava11</code> (1.13-1.16) runs the tests on Java 11 supported versions.
+<code>skriptTestJava17</code> (1.19.4-1.20.4) runs the tests on Java 17 supported versions.
 <code>skriptTest</code> runs the tests on all versions.
-That is, it runs skriptTestJava11, skriptTestJava17, and skriptTestJava21.
+That is, it runs skriptTestJava17, and skriptTestJava21.
 
 By running the tests, you agree to Mojang's End User License Agreement.
 

build.gradle

@@ -70,7 +70,7 @@ task build(overwrite: true, type: ShadowJar) {
 	from sourceSets.main.output
 }
 
-// Excludes the tests for the build task. Should be using junit, junitJava17, junitJava11, skriptTest, quickTest.
+// Excludes the tests for the build task. Should be using junit, junitJava17, skriptTest, quickTest.
 // We do not want tests to run for building. That's time consuming and annoying. Especially in development.
 test {
 	exclude '**/*'
@@ -233,11 +233,10 @@ void createTestTask(String name, String desc, String environments, int javaVersi
 
 def java21 = 21
 def java17 = 17
-def java11 = 11
 
 def latestEnv = 'java21/paper-1.21.0.json'
 def latestJava = java21
-def oldestJava = java11
+def oldestJava = java17
 
 def latestJUnitEnv = 'java17/paper-1.20.4.json'
 def latestJUnitJava = java17
@@ -260,25 +259,23 @@ int envJava = project.property('testEnvJavaVersion') == null ? latestJava : Inte
 createTestTask('quickTest', 'Runs tests on one environment being the latest supported Java and Minecraft.', environments + latestEnv, latestJava, 0)
 createTestTask('skriptTestJava21', 'Runs tests on all Java 21 environments.', environments + 'java21', java21, 0)
 createTestTask('skriptTestJava17', 'Runs tests on all Java 17 environments.', environments + 'java17', java17, 0)
-createTestTask('skriptTestJava11', 'Runs tests on all Java 11 environments.', environments + 'java11', java11, 0)
 createTestTask('skriptTestDev', 'Runs testing server and uses \'system.in\' for command input, stop server to finish.', environments + env, envJava, 0, Modifiers.DEV_MODE, Modifiers.DEBUG)
 createTestTask('skriptProfile', 'Starts the testing server with JProfiler support.', environments + latestEnv, latestJava, -1, Modifiers.PROFILE)
 createTestTask('genNightlyDocs', 'Generates the Skript documentation website html files.', environments + env, envJava, 0, Modifiers.GEN_NIGHTLY_DOCS)
 createTestTask('genReleaseDocs', 'Generates the Skript documentation website html files for a release.', environments + env, envJava, 0, Modifiers.GEN_RELEASE_DOCS)
 tasks.register('skriptTest') {
 	description = 'Runs tests on all environments.'
-	dependsOn skriptTestJava11, skriptTestJava17, skriptTestJava21
+	dependsOn skriptTestJava17, skriptTestJava21
 }
 
 createTestTask('JUnitQuick', 'Runs JUnit tests on one environment being the latest supported Java and Minecraft.', environments + latestJUnitEnv, latestJUnitJava, 0, Modifiers.JUNIT)
 // Disabled as EasyMock 5.2.0 is required for Java 21 support
 // However, we are currently using 5.0.1 (see https://github.com/SkriptLang/Skript/pull/6204#discussion_r1405302009)
 //createTestTask('JUnitJava21', 'Runs JUnit tests on all Java 21 environments.', environments + 'java21', java21, 0, Modifiers.JUNIT)
 createTestTask('JUnitJava17', 'Runs JUnit tests on all Java 17 environments.', environments + 'java17', java17, 0, Modifiers.JUNIT)
-createTestTask('JUnitJava11', 'Runs JUnit tests on all Java 11 environments.', environments + 'java11', java11, 0, Modifiers.JUNIT)
 tasks.register('JUnit') {
 	description = 'Runs JUnit tests on all environments.'
-	dependsOn JUnitJava11, JUnitJava17//, JUnitJava21
+	dependsOn JUnitJava17//, JUnitJava21
 }
 
 // Build flavor configurations

code-conventions.md

@@ -194,9 +194,8 @@ Your comments should look something like these:
 ## Language Features
 
 ### Compatibility
-[//]: # (To be updated for 2.10 for Java 17)
-* Contributions should maintain Java 11 source/binary compatibility, even though compiling Skript requires Java 21
-  - Users must not need JRE newer than version 11
+* Contributions should maintain Java 17 source/binary compatibility, even though compiling Skript requires Java 21
+  - Users must not need JRE newer than version 17
 * Versions up to and including Java 21 should work too
   - Please avoid using unsafe reflection
 * It is recommended to make fields final, if they are effectively final