chore: deprecated Gradle internal VersionNumber not used

* Do not use deprecated gradle internal VersionNumber

This fixes caused deprecation warnings and incompatibility with
Gradle => 8.1

* Tweak comment

* Simplify VersionNumber to usecases of this plugin

* Minor test polishing

src/main/groovy/com/avast/gradle/dockercompose/ComposeExecutor.groovy

@@ -14,14 +14,15 @@ import org.gradle.api.services.BuildServiceParameters
 import org.gradle.internal.UncheckedException
 import org.gradle.process.ExecOperations
 import org.gradle.process.ExecSpec
-import org.gradle.util.VersionNumber
 import org.yaml.snakeyaml.Yaml
 
 import javax.inject.Inject
 import java.lang.ref.WeakReference
 import java.util.concurrent.ConcurrentHashMap
 import java.util.concurrent.Executors
 
+import com.avast.gradle.dockercompose.util.VersionNumber
+
 abstract class ComposeExecutor implements BuildService<Parameters>, AutoCloseable {
     static interface Parameters extends BuildServiceParameters {
         abstract DirectoryProperty getProjectDirectory()

src/main/groovy/com/avast/gradle/dockercompose/tasks/ComposeDownForced.groovy

@@ -3,13 +3,13 @@ package com.avast.gradle.dockercompose.tasks
 import com.avast.gradle.dockercompose.ComposeExecutor
 import com.avast.gradle.dockercompose.RemoveImages
 import com.avast.gradle.dockercompose.ServiceInfoCache
+import com.avast.gradle.dockercompose.util.VersionNumber
 import org.gradle.api.DefaultTask
 import org.gradle.api.file.RegularFileProperty
 import org.gradle.api.provider.ListProperty
 import org.gradle.api.provider.Property
 import org.gradle.api.tasks.Internal
 import org.gradle.api.tasks.TaskAction
-import org.gradle.util.VersionNumber
 
 import java.time.Duration
 

src/main/groovy/com/avast/gradle/dockercompose/util/VersionNumber.java

@@ -0,0 +1,119 @@
+package com.avast.gradle.dockercompose.util;
+
+import javax.annotation.Nullable;
+import java.util.Objects;
+
+/**
+ * This class is a simplified version of the deprecated org.gradle.util.VersionNumber class
+ * See https://github.com/gradle/gradle/blob/7d8cacafe70e5c4cc06173550cb13511cfbf3749/subprojects/core/src/main/java/org/gradle/util/VersionNumber.java
+ * causing compatibility issues with Gradle 8.1 onwards.
+ */
+public class VersionNumber implements Comparable<VersionNumber> {
+    public static final VersionNumber UNKNOWN = new VersionNumber(0, 0, 0);
+
+    private final int major;
+    private final int minor;
+    private final int micro;
+
+    private VersionNumber(int major, int minor, int micro) {
+        this.major = major;
+        this.minor = minor;
+        this.micro = micro;
+    }
+
+    @Override
+    public int compareTo(VersionNumber other) {
+        if (major != other.major) {
+            return major - other.major;
+        }
+        if (minor != other.minor) {
+            return minor - other.minor;
+        }
+        if (micro != other.micro) {
+            return micro - other.micro;
+        }
+        return 0;
+    }
+
+    @Override
+    public boolean equals(@Nullable Object other) {
+        return other instanceof VersionNumber && compareTo((VersionNumber) other) == 0;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(major, minor, micro);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("%d.%d.%d", major, minor, micro);
+    }
+
+    public static VersionNumber parse(String versionString) {
+        if (versionString == null || versionString.length() == 0) {
+            return UNKNOWN;
+        }
+        Scanner scanner = new Scanner(versionString);
+
+        int major = 0;
+        int minor = 0;
+        int micro = 0;
+
+        if (!scanner.hasDigit()) {
+            return UNKNOWN;
+        }
+        major = scanner.scanDigit();
+        if (scanner.isSeparatorAndDigit()) {
+            scanner.skipSeparator();
+            minor = scanner.scanDigit();
+            if (scanner.isSeparatorAndDigit()) {
+                scanner.skipSeparator();
+                micro = scanner.scanDigit();
+            }
+        }
+
+        if (scanner.isEnd()) {
+            return new VersionNumber(major, minor, micro);
+        }
+
+        return UNKNOWN;
+    }
+
+    private static class Scanner {
+        int pos;
+        final String str;
+
+        private Scanner(String string) {
+            this.str = string;
+        }
+
+        boolean hasDigit() {
+            return pos < str.length() && Character.isDigit(str.charAt(pos));
+        }
+
+        boolean isSeparatorAndDigit() {
+            return pos < str.length() - 1 && isSeparator() && Character.isDigit(str.charAt(pos + 1));
+        }
+
+        private boolean isSeparator() {
+            return str.charAt(pos) == '.';
+        }
+
+        int scanDigit() {
+            int start = pos;
+            while (hasDigit()) {
+                pos++;
+            }
+            return Integer.parseInt(str.substring(start, pos));
+        }
+
+        public boolean isEnd() {
+            return pos == str.length();
+        }
+
+        public void skipSeparator() {
+            pos++;
+        }
+    }
+}

src/test/groovy/com/avast/gradle/dockercompose/util/VersionNumberTest.groovy

@@ -0,0 +1,30 @@
+package com.avast.gradle.dockercompose.util
+
+import spock.lang.Specification
+import spock.lang.Unroll
+
+import static com.avast.gradle.dockercompose.util.VersionNumber.parse
+
+class VersionNumberTest extends Specification {
+
+    @Unroll
+    def "can compare version #a and #b"() {
+        expect:
+        parse(a) <=> parse(b) == expected
+        where:
+        a        | b        | expected
+        "0.0.1"  | "0.0.1"  | 0
+        "0.0.1"  | "0.0.2"  | -1
+        "0.0.2"  | "0.0.1"  | 1
+        "0.1.0"  | "0.1.0"  | 0
+        "0.1.0"  | "0.1.0"  | 0
+        "1.1.1"  | "1.1.1"  | 0
+        "1.1.0"  | "1.2.0"  | -1
+        "1.28.0" | "1.16.0" | 1
+    }
+
+    def "handles non parseable versions as UNKNOWN"() {
+        expect:
+        parse("SomeInvalid") == VersionNumber.UNKNOWN
+    }
+}