Compile with Java 21

.editorconfig

@@ -9,6 +9,7 @@ indent_size = 4
 ij_kotlin_allow_trailing_comma = true
 ij_kotlin_allow_trailing_comma_on_call_site = true
 ktlint_standard_property-naming = disabled
+ktlint_code_style = intellij_idea
 
 [{*.yml,yaml}]
 indent_size = 2

.github/workflows/default.yml

@@ -20,11 +20,10 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: set up JDK
-        uses: actions/setup-java@v3
+      - uses: actions/setup-java@v3
         with:
           distribution: 'temurin'
-          java-version: 20
+          java-version: 21
 
       - name: Write Gradle build properties to `~/.gradle/gradle.properties`
         run: |
@@ -87,7 +86,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        javaVersion: [ 17, 20 ]
+        javaVersion: [ 17, 21 ]
         gradle: [ release-candidate ]
         agp: ${{ fromJSON(needs.provide-agp-version-matrix.outputs.agp-versions) }}
         include:
@@ -107,8 +106,7 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: set up JDK
-        uses: actions/setup-java@v3
+      - uses: actions/setup-java@v3
         with:
           distribution: 'temurin'
           java-version: ${{ matrix.javaVersion }}
@@ -119,8 +117,6 @@ jobs:
           printf "org.gradle.jvmargs=-Xmx3G -XX:+UseParallelGC\n" >> ~/.gradle/gradle.properties
         shell: bash
 
-      - uses: android-actions/setup-android@v2
-
       - uses: gradle/gradle-build-action@v2
 
       - name: Pre-compile plugin
@@ -138,16 +134,15 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        javaVersion: [ 17, 20 ]
+        javaVersion: [ 17, 21 ]
         os: [ ubuntu-latest, windows-latest, macos-latest ]
 
     steps:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
-      - name: set up JDK
-        uses: actions/setup-java@v3
+      - uses: actions/setup-java@v3
         with:
           distribution: 'temurin'
           java-version: ${{ matrix.javaVersion }}
@@ -176,11 +171,10 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: set up JDK
-        uses: actions/setup-java@v3
+      - uses: actions/setup-java@v3
         with:
           distribution: 'temurin'
-          java-version: 20
+          java-version: 21
 
       - name: Write Gradle build properties to `~/.gradle/gradle.properties`
         run: |

.github/workflows/dependency_diff.yml

@@ -12,11 +12,10 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: set up JDK
-        uses: actions/setup-java@v3
+      - uses: actions/setup-java@v3
         with:
           distribution: 'temurin'
-          java-version: 20
+          java-version: 21
 
       - name: Write Gradle build properties to `~/.gradle/gradle.properties`
         run: |

.github/workflows/publish_release.yml

@@ -14,11 +14,10 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Set up JDK
-        uses: actions/setup-java@v3
+      - uses: actions/setup-java@v3
         with:
           distribution: 'temurin'
-          java-version: 20
+          java-version: 21
 
       - name: Write Gradle build properties to `~/.gradle/gradle.properties`
         run: |

easylauncher/build.gradle

@@ -48,7 +48,7 @@ tasks.withType(KotlinCompile).configureEach {
     }
 }
 kotlin {
-    jvmToolchain(20)
+    jvmToolchain(21)
 }
 
 dependencies {

gradle/plugins/build.gradle

@@ -19,7 +19,7 @@ dependencies {
 }
 
 kotlin {
-    jvmToolchain(20)
+    jvmToolchain(21)
 }
 
 gradlePlugin {

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip
 networkTimeout=10000
+validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradlew

@@ -83,10 +83,8 @@ done
 # This is normally unused
 # shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
-APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
-
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum
@@ -133,26 +131,29 @@ location of your Java installation."
     fi
 else
     JAVACMD=java
-    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
 
 Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
+    fi
 fi
 
 # Increase the maximum file descriptors if we can.
 if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
     case $MAX_FD in #(
       max*)
         # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
-        # shellcheck disable=SC3045
+        # shellcheck disable=SC2039,SC3045
         MAX_FD=$( ulimit -H -n ) ||
             warn "Could not query maximum file descriptor limit"
     esac
     case $MAX_FD in  #(
       '' | soft) :;; #(
       *)
         # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
-        # shellcheck disable=SC3045
+        # shellcheck disable=SC2039,SC3045
         ulimit -n "$MAX_FD" ||
             warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac
@@ -197,11 +198,15 @@ if "$cygwin" || "$msys" ; then
     done
 fi
 
-# Collect all arguments for the java command;
-#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
-#     shell script including quotes and variable substitutions, so put them in
-#     double quotes to make sure that they get re-expanded; and
-#   * put everything else in single quotes, so that it's not re-expanded.
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
 
 set -- \
         "-Dorg.gradle.appname=$APP_BASE_NAME" \