task: add publish configuration to Gradle

Author: jwilkinson87

build.gradle.kts

@@ -1,6 +1,7 @@
 plugins {
     kotlin("jvm") version "2.0.21"
     kotlin("plugin.serialization") version "2.1.0"
+    `maven-publish`
 }
 
 group = "org.ctrlhub"
@@ -23,6 +24,42 @@ dependencies {
     testImplementation(libs.ktor.client.mock)
 }
 
+fun Project.getGitTag(): String {
+    return try {
+        val process = ProcessBuilder("git", "describe", "--tags", "--abbrev=0")
+            .redirectErrorStream(true)
+            .start()
+        process.waitFor(10, TimeUnit.SECONDS)
+        process.inputStream.bufferedReader().readText().trim()
+    } catch (e: Exception) {
+        "0.0.0" // Default version if no tags are found
+    }
+}
+
+publishing {
+    repositories {
+        maven {
+            name = "GitHubPackages"
+            url = uri("https://maven.pkg.github.com/ctrl-hub/sdk.kotlin")
+
+            credentials {
+                username = System.getenv("GITHUB_USERNAME")
+                password = System.getenv("GITHUB_TOKEN")
+            }
+        }
+    }
+
+    publications {
+        create<MavenPublication>("gpr") {
+            groupId = "com.ctrlhub"
+            artifactId = "sdk"
+            version = project.getGitTag()
+
+            from(components["kotlin"])
+        }
+    }
+}
+
 tasks.test {
     useJUnitPlatform()
 }