AutoPkg: Modularize pre/postinstall scripts

ci_tooling/autopkg/postinstall.sh

@@ -1,13 +1,64 @@
-#!/bin/sh
+#!/bin/zsh --no-rcs
+# ------------------------------------------------------
+# AutoPkg Assets Postinstall Script
+# ------------------------------------------------------
+# Create alias for app, start patching and reboot.
+# ------------------------------------------------------
 
-# Create alias for OpenCore-Patcher.app
-if [ ! -d "/Applications/OpenCore-Patcher.app" ]; then
-    ln -s "/Library/Application Support/Dortania/OpenCore-Patcher.app" "/Applications/OpenCore-Patcher.app"
-fi
 
-# Start root patching
-app_path="/Library/Application Support/Dortania/OpenCore-Patcher.app/Contents/MacOS/OpenCore-Patcher"
-args="--patch_sys_vol"
-"$app_path" "$args" &> "/Users/Shared/.OCLP-AutoPatcher-Log-$(date +"%Y_%m_%d_%I_%M_%p").txt"
-log show --last boot > "/Users/Shared/.OCLP-System-Log-$(date +"%Y_%m_%d_%I_%M_%p").txt"
-reboot
+# MARK: Variables
+# ---------------------------
+
+mainAppPath="/Library/Application Support/Dortania/OpenCore-Patcher.app"
+shimAppPath="/Applications/OpenCore-Patcher.app"
+executablePath="$mainAppPath/Contents/MacOS/OpenCore-Patcher"
+
+
+# MARK: Functions
+# ---------------------------
+
+function _createAlias() {
+    local mainPath=$1
+    local aliasPath=$2
+
+    # Check if alias path exists
+    if [[ -e $aliasPath ]]; then
+        # Check if alias path is a symbolic link
+        if [[ -L $aliasPath ]]; then
+            /bin/rm -f $aliasPath
+        else
+            /bin/rm -rf $aliasPath
+        fi
+    fi
+
+    # Create symbolic link
+    /bin/ln -s $mainPath $aliasPath
+}
+
+function _startPatching() {
+    local executable=$1
+    local logPath=$(_logFile)
+
+    # Start patching
+    "$executable" "--patch_sys_vol" &> $logPath
+}
+
+function _logFile() {
+    echo "/Users/Shared/.OCLP-AutoPatcher-Log-$(/bin/date +"%Y_%m_%d_%I_%M_%p").txt"
+}
+
+function _reboot() {
+    /sbin/reboot
+}
+
+function _main() {
+    _createAlias "$mainAppPath" "$shimAppPath"
+    _startPatching "$executablePath"
+    _reboot
+}
+
+
+# MARK: Main
+# ---------------------------
+
+_main