Make the Linux/macOS installer parent-independant

Author: ZakaHaceCosas

docs/install.sh

@@ -2,9 +2,29 @@
 
 # error handling
 set -e
-set -x
 set -u
 
+# self-extract process
+if [ "${EXTRACTED:-0}" != "1" ]; then
+    export EXTRACTED=1
+
+    # store parent (fkn) PID
+    OLD_PPID=$PPID
+    PARENT=$(ps -p $PPID -o comm=)
+
+    # rerun on a new "orphan" process
+    setsid "$0" "$@" &
+
+    # if possible, kill the parent
+    # that sounds so wrong omg
+    if [[ "$PARENT" == *"FuckingNode"* ]]; then
+        kill "$OLD_PPID" 2>/dev/null
+    fi
+
+    # exit the child process
+    exit
+fi
+
 # constants
 APP_NAME="FuckingNode"
 CLI_NAME="fuckingnode"