Add qa-remove

Author: mariogrip

README.md

@@ -5,11 +5,12 @@ Messy scrips for updating your device using ubports dev ppa
 ## Install
 
 ```
-wget -O - https://github.com/raw/mariogrip/qa-scripts/master/qa-install | bash
+wget -qO - https://github.com/raw/mariogrip/qa-scripts/master/qa-install | bash
 ```
 
 
 ## Usage
 
 * `qa-add` - adds and setup ubports dev ppa
 * `qa-update` - Updates from the dev ppa
+* `qa-remove` - Remove dev ppa and revert back packages

qa-remove

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+if [ ! -f /etc/apt/sources.list.d/ubports-developers-ubuntu-overlay-dev-vivid.list ]; then
+  echo "The dev ppa is not added, nothing to remove."
+  exit
+fi
+
+# Gimme root
+[ $(id -u) -ne 0 ] && exec sudo $0 $@
+
+mount -o rw,remount /
+
+LINE=$(grep -n "Pin: release o=LP-PPA-ubports-developers-overlay-dev" /etc/apt/preferences.d/extra-ppas.pref | grep -Eo '^[^:]+')
+LINES="$((LINE - 2)),$((LINE + 1))d"
+
+sed -e "$LINES" /etc/apt/preferences.d/extra-ppas.pref | tee /etc/apt/preferences.d/extra-ppas.pref
+rm /etc/apt/sources.list.d/ubports-developers-ubuntu-overlay-dev-vivid.list || true
+
+apt update
+apt dist-upgrade