Add asset purge script for git history cleanup

scripts/purge-generated-assets.sh

@@ -0,0 +1,67 @@
+#!/bin/bash
+
+# TimeSafari Generated Assets Purge Script
+# Removes generated Android assets and resources from git history
+# Author: Matthew Raymer
+
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(dirname "$SCRIPT_DIR")"
+
+echo "=== TimeSafari Generated Assets Purge ==="
+echo "[$(date '+%Y-%m-%d %H:%M:%S')] [INFO] Starting git history cleanup"
+
+# Check if we're in a git repository
+if [ ! -d ".git" ]; then
+    echo "[ERROR] Not in a git repository. Please run this script from the project root."
+    exit 1
+fi
+
+# Check if we have uncommitted changes
+if [ -n "$(git status --porcelain)" ]; then
+    echo "[ERROR] You have uncommitted changes. Please commit or stash them first."
+    echo "Current status:"
+    git status --short
+    exit 1
+fi
+
+# Create backup branch
+BACKUP_BRANCH="backup-before-asset-purge-$(date +%Y%m%d-%H%M%S)"
+echo "[INFO] Creating backup branch: $BACKUP_BRANCH"
+git branch "$BACKUP_BRANCH"
+
+echo "[INFO] Starting git filter-branch to remove generated assets..."
+
+# Use git filter-branch to remove the directories from history
+git filter-branch --force --index-filter '
+    # Remove generated Android assets directory
+    git rm -rf --cached --ignore-unmatch android/app/src/main/assets/public/ 2>/dev/null || true
+    
+    # Remove generated Android resources (but keep config files)
+    git rm -rf --cached --ignore-unmatch android/app/src/main/res/drawable*/ 2>/dev/null || true
+    git rm -rf --cached --ignore-unmatch android/app/src/main/res/mipmap*/ 2>/dev/null || true
+    git rm -rf --cached --ignore-unmatch android/app/src/main/res/values/ic_launcher_background.xml 2>/dev/null || true
+    
+    # Keep configuration files
+    git add android/app/src/main/res/values/strings.xml 2>/dev/null || true
+    git add android/app/src/main/res/values/styles.xml 2>/dev/null || true
+    git add android/app/src/main/res/layout/activity_main.xml 2>/dev/null || true
+    git add android/app/src/main/res/xml/config.xml 2>/dev/null || true
+    git add android/app/src/main/res/xml/file_paths.xml 2>/dev/null || true
+' --prune-empty --tag-name-filter cat -- --all
+
+echo "[INFO] Cleaning up git filter-branch temporary files..."
+rm -rf .git/refs/original/
+git reflog expire --expire=now --all
+git gc --prune=now --aggressive
+
+echo "[SUCCESS] Generated assets purged from git history!"
+echo "[INFO] Backup branch created: $BACKUP_BRANCH"
+echo "[INFO] Repository size should be significantly reduced"
+echo ""
+echo "Next steps:"
+echo "1. Test that the repository works correctly"
+echo "2. Force push to remote: git push --force-with-lease origin <branch>"
+echo "3. Inform team members to re-clone or reset their local repositories"
+echo "4. Delete backup branch when confident: git branch -D $BACKUP_BRANCH"