From 2b2d28afe6414e14da97486669a20beff578e1db Mon Sep 17 00:00:00 2001
From: Sebastian Mark <smark@posteo.net>
Date: Fri, 1 Apr 2022 15:03:39 +0200
Subject: [PATCH] FEAT: add script to check for baseline updates

---
 bin/list_app_versions.py | 85 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100755 bin/list_app_versions.py

diff --git a/bin/list_app_versions.py b/bin/list_app_versions.py
new file mode 100755
index 0000000..44bfac1
--- /dev/null
+++ b/bin/list_app_versions.py
@@ -0,0 +1,85 @@
+#! /usr/bin/env python
+# -*- encoding: utf-8; py-indent-offset: 4 -*-
+
+# Author: Sebastian Mark
+# CC-BY-SA (https://creativecommons.org/licenses/by-sa/4.0/deed.de)
+# for civil use only
+
+import os
+from urllib.request import Request, urlopen
+
+import pandas as pd
+
+import yaml
+
+
+def kubectl(cmd: str) -> str:
+    cmd = f"kubectl -n argocd {cmd}"
+    return os.popen(cmd).read()
+
+
+def get_latest_version(repo_url: str, chart: str) -> str:
+    req = Request(
+        repo_url + "/index.yaml",
+        headers={"User-Agent": "Mozilla/5.0"},
+    )
+    with urlopen(req) as response:
+        body = response.read()
+    repos = yaml.safe_load(body)
+
+    chart_df = pd.DataFrame(repos["entries"][chart])
+    chart_df = chart_df[
+        ~chart_df.version.str.contains("alpha") & ~chart_df.version.str.contains("beta")
+    ]  # remove alpha versions
+
+    return chart_df.version.iloc[0]
+
+
+def get_argo_as_app() -> dict:
+    cm = kubectl("get configmaps argocd-cm -o yaml")
+    cm_formatted = yaml.safe_load(cm)
+    version = cm_formatted["metadata"]["labels"]["helm.sh/chart"].lstrip("argo-cd-")
+
+    return dict(
+        {
+            "metadata": {
+                "name": "argocd",
+            },
+            "spec": {
+                "source": {
+                    "chart": "argo-cd",
+                    "repoURL": "https://argoproj.github.io/argo-helm",
+                    "targetRevision": version,
+                },
+            },
+        }
+    )
+
+
+def get_apps() -> list:
+    apps = kubectl("get applications -o yaml")
+    app_list = yaml.safe_load(apps)["items"]
+    app_list.append(get_argo_as_app())
+    return app_list
+
+
+def main():
+    print("{:<20}{:<15}{:<10}".format("name", "installed", "latest"))
+
+    for app in get_apps():
+        try:
+            app["spec"]["source"]["chart"]  # skip non-helm apps
+        except KeyError:
+            continue
+
+        name = app["metadata"]["name"]
+        chart = app["spec"]["source"]["chart"]
+        repo_url = app["spec"]["source"]["repoURL"]
+        installed = app["spec"]["source"]["targetRevision"]
+        latest = get_latest_version(repo_url, chart)
+
+        print("{:<20}{:<15}{:<10}".format(name, installed, latest))
+
+
+if __name__ == "__main__":
+    main()