From 483b9da8b7b7850389dc259127bc226311dde1b2 Mon Sep 17 00:00:00 2001
From: Hanno Fellmann <mail@hanno-fellmann.de>
Date: Fri, 27 Oct 2023 12:13:08 +0200
Subject: [PATCH] add sha generation

---
 build.gradle.kts | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/build.gradle.kts b/build.gradle.kts
index 8c237a63..26de4f81 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,5 +1,8 @@
 import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
 import org.jetbrains.dokka.gradle.DokkaTask
+import java.io.OutputStream
+import java.security.DigestOutputStream
+import java.security.MessageDigest
 
 plugins {
     id("org.jetbrains.kotlin.jvm") version "1.8.20" // Apply the Kotlin JVM plugin to add support for Kotlin.
@@ -188,4 +191,19 @@ tasks {
     test {
         jvmArgs("--add-opens=java.base/java.lang=ALL-UNNAMED")
     }
-}
\ No newline at end of file
+    shadowJar {
+        doLast {
+            println(calcSha1(File("$buildDir/libs/$executableName.jar")))
+        }
+    }
+}
+
+fun calcSha1(file: File): String {
+    val md = DigestOutputStream(
+        OutputStream.nullOutputStream(), MessageDigest.getInstance("SHA-1")
+    )
+    file.inputStream().copyTo(md)
+    return md.messageDigest.digest().toHex()
+}
+
+fun ByteArray.toHex() = joinToString(separator = "") { eachByte -> "%02x".format(eachByte) }