From 190d6542d3d0be664ff14b11d7c93937293d8efe Mon Sep 17 00:00:00 2001
From: Karol Mazurek <karol.mazurek95@gmail.com>
Date: Mon, 22 Dec 2025 23:54:41 +0100
Subject: [PATCH] Add diff_apss.sh script for app patching analysis

---
 App Bundle Extension/custom/diff_apss.sh | 149 +++++++++++++++++++++++
 1 file changed, 149 insertions(+)
 create mode 100644 App Bundle Extension/custom/diff_apss.sh

diff --git a/App Bundle Extension/custom/diff_apss.sh b/App Bundle Extension/custom/diff_apss.sh
new file mode 100644
index 0000000..6b3ea14
--- /dev/null
+++ b/App Bundle Extension/custom/diff_apss.sh	
@@ -0,0 +1,149 @@
+#!/usr/bin/env bash 
+
+# Check if the correct number of arguments provided
+if [ $# -ne 2 ]; then
+    echo "Usage: $0 OLD_APP NEW_APP"
+    echo "Example: $0 OLD/Fantastical.app NEW/Fantastical.app"
+    exit 1
+fi
+
+OLD_APP="$1"
+NEW_APP="$2"
+
+# Check if directories exist
+if [ ! -d "$OLD_APP" ]; then
+    echo "Error: Old app directory '$OLD_APP' does not exist"
+    exit 1
+fi
+
+if [ ! -d "$NEW_APP" ]; then
+    echo "Error: New app directory '$NEW_APP' does not exist"
+    exit 1
+fi
+
+echo "=========================================="
+echo "APP PATCHING ANALYSIS"
+echo "=========================================="
+echo "Old App: $OLD_APP"
+echo "New App: $NEW_APP"
+echo "=========================================="
+
+# Run diff with -r for recursive and -q for brief output
+DIFF_OUTPUT=$(diff -rq "$OLD_APP" "$NEW_APP" 2>/dev/null)
+
+# Process new files
+echo -e "\n🆕 NEW FILES:"
+echo "----------------------------------------"
+NEW_LIST=$(echo "$DIFF_OUTPUT" | grep "Only in $NEW_APP" | sed "s|Only in $NEW_APP/||" | sed 's|: | → |')
+if [ -n "$NEW_LIST" ]; then
+    echo "$NEW_LIST" | while read -r line; do
+        echo "  + $line"
+    done
+else
+    echo "  (No new files)"
+fi
+
+# Process deleted files
+echo -e "\n❌ DELETED FILES:"
+echo "----------------------------------------"
+DELETED_LIST=$(echo "$DIFF_OUTPUT" | grep "Only in $OLD_APP" | sed "s|Only in $OLD_APP/||" | sed 's|: | → |')
+if [ -n "$DELETED_LIST" ]; then
+    echo "$DELETED_LIST" | while read -r line; do
+        echo "  - $line"
+    done
+else
+    echo "  (No deleted files)"
+fi
+
+# Process modified files
+echo -e "\n📝 MODIFIED FILES:"
+echo "----------------------------------------"
+MODIFIED_LIST=$(echo "$DIFF_OUTPUT" | grep "^Files.*differ$" | sed "s|Files $OLD_APP/||" | sed "s| and $NEW_APP/.*differ$||")
+if [ -n "$MODIFIED_LIST" ]; then
+    echo "$MODIFIED_LIST" | while read -r line; do
+        echo "  ~ $line"
+    done
+else
+    echo "  (No modified files)"
+fi
+
+# Find and report symlink changes
+echo -e "\n🔗 SYMLINK CHANGES:"
+echo "----------------------------------------"
+SYMLINK_CHANGES=""
+
+# Find all symlinks in OLD_APP
+while IFS= read -r old_symlink; do
+    rel_path="${old_symlink#$OLD_APP/}"
+    new_symlink="$NEW_APP/$rel_path"
+    
+    if [ ! -L "$new_symlink" ]; then
+        # Symlink was removed or converted to regular file
+        SYMLINK_CHANGES="${SYMLINK_CHANGES}  - Removed: $rel_path\n"
+    else
+        # Check if symlink target changed
+        old_target=$(readlink "$old_symlink")
+        new_target=$(readlink "$new_symlink")
+        if [ "$old_target" != "$new_target" ]; then
+            SYMLINK_CHANGES="${SYMLINK_CHANGES}  ~ Modified: $rel_path\n"
+            SYMLINK_CHANGES="${SYMLINK_CHANGES}      Old target: $old_target\n"
+            SYMLINK_CHANGES="${SYMLINK_CHANGES}      New target: $new_target\n"
+        fi
+    fi
+done < <(find "$OLD_APP" -type l)
+
+# Find new symlinks in NEW_APP
+while IFS= read -r new_symlink; do
+    rel_path="${new_symlink#$NEW_APP/}"
+    old_symlink="$OLD_APP/$rel_path"
+    
+    if [ ! -L "$old_symlink" ]; then
+        # New symlink added
+        new_target=$(readlink "$new_symlink")
+        SYMLINK_CHANGES="${SYMLINK_CHANGES}  + Added: $rel_path → $new_target\n"
+    fi
+done < <(find "$NEW_APP" -type l)
+
+if [ -n "$SYMLINK_CHANGES" ]; then
+    echo -e "$SYMLINK_CHANGES"
+else
+    echo "  (No symlink changes)"
+fi
+
+# Count totals
+NEW_COUNT=$(echo "$DIFF_OUTPUT" | grep -c "Only in $NEW_APP" 2>/dev/null || echo "0")
+DELETED_COUNT=$(echo "$DIFF_OUTPUT" | grep -c "Only in $OLD_APP" 2>/dev/null || echo "0")
+MODIFIED_COUNT=$(echo "$DIFF_OUTPUT" | grep -c "^Files.*differ$" 2>/dev/null || echo "0")
+
+# Ensure counts are single integers
+NEW_COUNT=$(echo "$NEW_COUNT" | head -n1 | tr -d '\n')
+DELETED_COUNT=$(echo "$DELETED_COUNT" | head -n1 | tr -d '\n')
+MODIFIED_COUNT=$(echo "$MODIFIED_COUNT" | head -n1 | tr -d '\n')
+
+# Summary
+echo -e "\n📊 SUMMARY:"
+echo "=========================================="
+echo "New files:      $NEW_COUNT"
+echo "Deleted files:  $DELETED_COUNT"  
+echo "Modified files: $MODIFIED_COUNT"
+echo "Total changes:  $((NEW_COUNT + DELETED_COUNT + MODIFIED_COUNT))"
+echo "=========================================="
+
+# Binary file detection
+BINARY_CHANGES=""
+while IFS= read -r file; do
+    if [ -n "$file" ]; then
+        full_path="$NEW_APP/$file"
+        if [ -f "$full_path" ] && [ ! -L "$full_path" ]; then
+            file_type=$(file -b "$full_path" 2>/dev/null)
+            if echo "$file_type" | grep -qE "(executable|shared library)"; then
+                BINARY_CHANGES="$BINARY_CHANGES$file\n"
+            fi
+        fi
+    fi
+done <<< "$MODIFIED_LIST"
+
+if [ -n "$BINARY_CHANGES" ]; then
+    echo "⚠️  Binary files modified:"
+    echo -e "$BINARY_CHANGES" | sed 's/^/    /'
+fi
\ No newline at end of file