From bced382ac7f2b40006abc3622a28d080083302bf Mon Sep 17 00:00:00 2001
From: Ali Afsharzadeh <afsharzadeh8@gmail.com>
Date: Wed, 3 Dec 2025 11:08:12 +0330
Subject: [PATCH] Make mongodb_exporter user creation idempotent in postinst
 script

The previous postinst script unconditionally ran `useradd` to create the `mongodb_exporter` system user.

That would fail if the user already existed (e.g., during package upgrade), breaking the post-install process.
---
 .scripts/postinst | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/.scripts/postinst b/.scripts/postinst
index 36b7bb079..355baed80 100755
--- a/.scripts/postinst
+++ b/.scripts/postinst
@@ -2,13 +2,15 @@
 
 set -e
 
-echo "Creating user and group..."
-
-useradd --system \
+# creating mongodb_exporter user if he isn't already there
+if ! getent passwd mongodb_exporter >/dev/null; then
+    useradd \
+        --system \
         --no-create-home \
         --shell /sbin/nologin \
         --comment "MongoDB Exporter" \
-        mongodb_exporter
+        mongodb_exporter >/dev/null
+fi
 
 systemctl daemon-reload > dev/null || exit $?