feat: Inform user if cli is outdated (#81)

Author: prateek-who

src/main/kotlin/app/morphe/cli/command/PatchCommand.kt

@@ -20,6 +20,7 @@ import app.morphe.cli.command.model.toPatchBundle
 import app.morphe.cli.command.model.toSerializablePatch
 import app.morphe.cli.command.model.withUpdatedBundle
 import app.morphe.engine.ApkLibraryStripper
+import app.morphe.engine.UpdateChecker
 import app.morphe.patcher.apk.ApkUtils
 import app.morphe.patcher.apk.ApkUtils.applyTo
 import app.morphe.library.installation.installer.*
@@ -318,6 +319,9 @@ internal object PatchCommand : Callable<Int> {
     private var updateOptions: Boolean = false
 
     override fun call(): Int {
+        // Check for any newer version
+        UpdateChecker.check()?.let { logger.info(it) }
+
         // region Setup
 
         val outputFilePath =

src/main/kotlin/app/morphe/engine/UpdateChecker.kt

@@ -0,0 +1,41 @@
+package app.morphe.engine
+
+import java.net.HttpURLConnection
+import java.net.URL
+import java.util.Properties
+
+
+object UpdateChecker {
+    fun check(): String? {
+        try {
+            // Try to get the latest version. (TTL IS SET TO 3000)
+            val currentVersion = javaClass.getResourceAsStream("/app/morphe/cli/version.properties")
+                ?.use { stream ->
+                    Properties().apply { load(stream) }.getProperty("version")
+                }
+                ?: return null
+
+            val connection = URL("https://api.github.com/repos/MorpheApp/morphe-cli/releases/latest")
+                .openConnection() as HttpURLConnection
+
+            connection.connectTimeout = 3000
+            connection.readTimeout = 3000
+            connection.setRequestProperty("Accept", "application/vnd.github.v3+json")
+
+            //
+            val response = connection.getInputStream().bufferedReader().use { it.readText() }
+
+            val latestVersion = Regex(""""tag_name"\s*:\s*"v?([^"]+)"""").find(response)
+                ?.groupValues?.get(1) ?: return null
+
+            if (latestVersion != currentVersion) {
+                return "Update available: v$latestVersion (current: v$currentVersion). Download from https://github.com/MorpheApp/morphe-cli/releases/latest"
+            }
+            return  null
+
+        }catch (e: Exception) {
+            // In case we fail anything, we silently return.
+            return null
+        }
+    }
+}