From 0c85b2d3fd3e9dee6a79091064e4fb7078adcdfb Mon Sep 17 00:00:00 2001
From: Matthias Stecher <matthiasstecher@gmx.de>
Date: Mon, 5 Oct 2020 18:26:47 +0200
Subject: [PATCH] __netbox: uninstall not anymore required packages

This code tries to remove packages not needed anymore. As it presumably
not removing dependencies, it's not that perfect pice of script.
---
 type/__netbox/gencode-remote | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/type/__netbox/gencode-remote b/type/__netbox/gencode-remote
index d7bc219..1cd4939 100755
--- a/type/__netbox/gencode-remote
+++ b/type/__netbox/gencode-remote
@@ -36,18 +36,35 @@ ps -axo pid,cmd | awk '\$2 ~ "^/opt/netbox/venv/"{print \$1}' | xargs kill || tr
 EOF
 
     cat << EOF
+# backup requirement files
+if [ -f /opt/netbox/requirements.txt]; then
+    cp /opt/netbox/requirements.txt /opt/netbox/old-requirements.txt
+else
+    # preseve file-not-found errors and warnings
+    touch /opt/netbox/old-requirements.txt
+fi
+cp '$src/requirements.txt' /opt/netbox/
+
 # Deploy sources and restore configuration.
 rm -r '$install_dir'
 cp -r '$src/netbox' '$install_dir'
 
-cp '$src/requirements.txt' /opt/netbox/  # backup dependency info
 ln -s /opt/netbox/cdist/configuration.py '$install_dir/netbox/configuration.py'
 ln -s /opt/netbox/cdist/ldap_config.py '$install_dir/netbox/ldap_config.py'
 
+
 # Setup & enter python virtualenv.
 #  forcing python3 to be sure (till python4 gets released ..)
 virtualenv -p python3 /opt/netbox/venv
 
+# Uninstall packages not required anymore
+# if versions not shortend, they will be ignored by pip, but not by comm
+# all of this could be done with grep, too, but it's still must be shortend with awk
+awk -F== '{print $1}' '/opt/netbox/requirements.txt' | sort > "\$tmpdir/curr-reqs.txt"
+awk -F== '{print $1}' '/opt/netbox/old-requirements.txt' | sort > "\$tmpdir/old-reqs.txt"
+comm -23 "\$tmpdir/curr-reqs.txt" "\$tmpdir/old-reqs.txt" \
+    | xargs /opt/netbox/venv/bin/pip3 uninstall -y
+
 # Install python dependencies.
 #  avoid gunicorn, because it will be done in an other type
 grep -v "^gunicorn==" "\$tmpdir/$src/requirements.txt" \
@@ -57,7 +74,7 @@ EOF
     if [ -f "$__object/parameter/ldap-server" ]; then
         echo "/opt/netbox/venv/bin/pip3 install django-auth-ldap"
     else
-        echo "/opt/netbox/venv/bin/pip3 uninstall django-auth-ldap"
+        echo "/opt/netbox/venv/bin/pip3 uninstall -y django-auth-ldap"
     fi
 
     cat << EOF