From 9674513c004d34ef942fee8f96f3f992224cb5a2 Mon Sep 17 00:00:00 2001
From: nicksinger <nsinger@suse.de>
Date: Wed, 7 Aug 2024 12:29:04 +0200
Subject: [PATCH] Add dehydrated cron output filter script

This can be used to filter `dehydrated --cron` output to only contain
error messages. This is the suggested solution from upstream:
https://github.com/dehydrated-io/dehydrated/issues/47#issuecomment-221867853

Can be tested with:

```
echo "# INFO: Using main config file /etc/dehydrated/config
Processing openqa.opensuse.org
 + Checking domain name(s) of existing cert... unchanged.
 + Checking expire date of existing cert...
 + Valid till Oct 17 23:00:12 2024 GMT (Longer than 30 days). Skipping renew!" | ./filter-dehydrated-cron-output
```

Related issue: https://progress.opensuse.org/issues/165027
---
 filter-dehydrated-cron-output | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100755 filter-dehydrated-cron-output

diff --git a/filter-dehydrated-cron-output b/filter-dehydrated-cron-output
new file mode 100755
index 0000000..0be4670
--- /dev/null
+++ b/filter-dehydrated-cron-output
@@ -0,0 +1,30 @@
+#!/bin/bash
+set -euo pipefail
+usage() {
+    cat << EOF
+Usage: dehydrated --cron | $0 [OPTIONS]
+
+Filter dehydrated cron output to only contain error messages as upstream suggested in
+https://github.com/dehydrated-io/dehydrated/issues/47#issuecomment-221867853
+
+Options:
+ -h, --help         display this help
+EOF
+    exit "$1"
+}
+main() {
+    opts=$(getopt -o h -l help -n "$0" -- "$@") || usage 1
+    eval set -- "$opts"
+    while true; do
+        case "$1" in
+            -h | --help) usage 0 ;;
+            --)
+                shift
+                break
+                ;;
+            *) break ;;
+        esac
+    done
+    grep -v "^# INFO" | perl -0pe "s/Processing (.*)*\n \+ (.*)unchanged.\n \+ Checking .*\.\.\.\n \+ Valid till (.*) \(Longer than .* Skipping renew!//gm" | grep -v "^$"
+}
+caller 0 > /dev/null || main "$@"