Update upgrade script

linux.install

@@ -1,31 +1,29 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
-_5_2_2_2_changes() {
-  echo ":: A new command line option was added: add page_alloc.shuffle=1"
+function _5_2_2_2_changes() {
+ echo ":: Update 5.2.2-2: A new command line option was added: add page_alloc.shuffle=1"
 }
 
-_5_2_9_6_changes() {
-  echo ":: Microcode is no longer builtin. See https://wiki.archlinux.org/index.php/Microcode"
+function _5_2_9_6_changes() {
+ echo ":: Update 5.2.9-6: Microcode is no longer builtin. See https://wiki.archlinux.org/index.php/Microcode"
 }
 
-post_install() {
-  echo ":: Clear Linux bundles a custom command line which must be applied manually on other distributions."
-  echo "   This is their default command line:"
-  echo "   quiet console=tty0 console=ttyS0,115200n8 cryptomgr.notests initcall_debug"
-  echo "   intel_iommu=igfx_off kvm-intel.nested=1 no_timer_check noreplace-smp"
-  echo "   page_alloc.shuffle=1 rcupdate.rcu_expedited=1"
-  echo "   rootfstype=ext4,btrfs,xfs,f2fs tsc=reliable rw"
+function post_install() {
+ echo ":: Clear Linux bundles a custom command line which must be applied manually on other distributions."
+ echo "  This is their default command line:"
+ echo "  quiet console=tty0 console=ttyS0,115200n8 cryptomgr.notests initcall_debug"
+ echo "  intel_iommu=igfx_off kvm-intel.nested=1 no_timer_check noreplace-smp"
+ echo "  page_alloc.shuffle=1 rcupdate.rcu_expedited=1"
+ echo "  rootfstype=ext4,btrfs,xfs,f2fs tsc=reliable rw"
 }
 
-post_upgrade() {
-  local v upgrades=(
-    5.2.2-2
-    5.2.9-6
-  )
+function post_upgrade() {
+ local version upgrades=(
+  5.2.2-2
+  5.2.9-6
+ )
 
-  for v in "${upgrades[@]}"; do
-    if [[ $(vercmp "${v}" "$2") -eq 1 ]]; then
-      "_${v//[.-]/_}_changes"
-    fi
-  done
+ for version in "${upgrades[@]}"; do
+  [[ $(vercmp "${version}" "$2") -eq 1 ]] && "_${version//[.-]/_}_changes"
+ done
 }