Report EOL and maintenance status for Gradle versions

sources/src/execution/gradle-version.ts

@@ -0,0 +1,24 @@
+export class GradleVersion {
+    static PATTERN = /((\d+)(\.\d+)+)(-([a-z]+)-(\w+))?(-(SNAPSHOT|\d{14}([-+]\d{4})?))?/
+
+    major: number
+    versionPart: string
+    stagePart: string
+    snapshotPart: string
+
+    constructor(readonly version: string) {
+        const matcher = GradleVersion.PATTERN.exec(version)
+        if (!matcher) {
+            throw new Error(`'${version}' is not a valid Gradle version string (examples: '1.0', '1.0-rc-1')`)
+        }
+
+        this.major = Number(matcher[2])
+        this.versionPart = matcher[1]
+        this.stagePart = matcher[4]
+        this.snapshotPart = matcher[7]
+    }
+
+    isFinalRelease(): boolean {
+        return !this.stagePart && !this.snapshotPart
+    }
+}