From 005ea4146be8d9dcd56b67782954ec38d2fc5b74 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gergely=20B=C3=A9k=C3=A9si?= <gergely.bekesi@ethswarm.org>
Date: Tue, 5 May 2026 12:00:10 +0200
Subject: [PATCH] feat: show warning when new swarm-cli version is available

---
 src/command/root-command/index.ts |  3 +++
 src/service/version_checker.ts    | 22 ++++++++++++++++++++++
 2 files changed, 25 insertions(+)
 create mode 100644 src/service/version_checker.ts

diff --git a/src/command/root-command/index.ts b/src/command/root-command/index.ts
index 11f62adf..33e882ba 100644
--- a/src/command/root-command/index.ts
+++ b/src/command/root-command/index.ts
@@ -6,6 +6,7 @@ import { parseHeaders } from '../../utils'
 import { ConfigOption } from '../../utils/types/config-option'
 import { CONFIG_OPTIONS, CommandConfig } from './command-config'
 import { CommandLog, VerbosityLevel } from './command-log'
+import { checkForUpdates } from '../../service/version_checker'
 
 export class RootCommand {
   @ExternalOption('bee-api-url')
@@ -57,6 +58,8 @@ export class RootCommand {
     this.commandConfig = new CommandConfig(this.appName, this.console, this.configFile, this.configFolder)
     this.sourcemap = Utils.getSourcemap()
 
+    checkForUpdates()
+
     CONFIG_OPTIONS.forEach((option: ConfigOption) => {
       this.maybeSetFromConfig(option)
     })
diff --git a/src/service/version_checker.ts b/src/service/version_checker.ts
new file mode 100644
index 00000000..0a776c67
--- /dev/null
+++ b/src/service/version_checker.ts
@@ -0,0 +1,22 @@
+import PackageJson from '../../package.json'
+import { CommandLog, VerbosityLevel } from '../command/root-command/command-log'
+import { warningText } from '../utils/text'
+
+const LATEST_RELEASE_URL = 'https://api.github.com/repos/ethersphere/swarm-cli/releases/latest'
+
+export async function checkForUpdates() {
+  const console = new CommandLog(VerbosityLevel.Normal)
+  await fetch(LATEST_RELEASE_URL)
+    .then(res => res.json())
+    .then((data: { tag_name: string }) => {
+      const latestVersion = data.tag_name.replace(/^v/, '')
+
+      if (latestVersion !== PackageJson.version) {
+        console.log(
+          warningText(
+            `A new version of swarm-cli is available: ${latestVersion}. You are using version ${PackageJson.version}. Please update to the latest version.`,
+          ),
+        )
+      }
+    })
+}