Git corruption recovery

git_corruption_recovery.sh

#!/bin/bash
# =====================================================
# Git Recovery Script
# =====================================================
# Purpose:
#   This script is designed to safely recover a local Git repository
#   when the .git folder is corrupted or lost, while preserving all
#   local changes and merging them with a remote repository.
#
# What it does:
#   1. Creates a backup of your current repository and its .git folder.
#   2. Initializes a fresh Git repository.
#   3. Commits all your current local code to preserve it.
#   4. Adds the remote repository and fetches its content.
#   5. Merges the remote branch into your local commit.
#      - Automatically keeps your local files if there are conflicts
#        (both code and binary files like models).
#   6. Pushes the recovered repository back to the remote.
#
# When to use:
#   - Your local repository's .git folder is corrupted or empty.
#   - You have local changes that are newer than the remote.
#   - You want to recover a repository without losing any local work.
#   - You want a clean repository setup with the remote synced.
#
# How to use:
#   ./git_recover.sh /path/to/your/repo <remote_url>
# Example:
#   ./git_recover.sh ~/Desktop/AcSYS/acsys-ai-vision-gui \
#       https://github.com/AcSYS-Engineering/acsys-ai-vision-gui.git

set -e

REPO_PATH="$1"
REMOTE_URL="$2"

if [ -z "$REPO_PATH" ] || [ -z "$REMOTE_URL" ]; then
    echo "Usage: $0 /path/to/repo remote_url"
    exit 1
fi

if [ ! -d "$REPO_PATH" ]; then
    echo "Error: Repository path does not exist: $REPO_PATH"
    exit 1
fi

cd "$REPO_PATH"

RECOVERY_DIR="$(dirname "$REPO_PATH")/git_recovery_snapshot"
mkdir -p "$RECOVERY_DIR"

REPO_NAME="$(basename "$REPO_PATH")"
cp -r "$REPO_PATH" "$RECOVERY_DIR/"

if [ -d ".git" ]; then
    mv .git .git_corrupted
fi

git init
git branch -M main
git remote add origin "$REMOTE_URL"

git add .
git commit -m "Initial commit of recovered local code"

git fetch origin
git merge origin/main --allow-unrelated-histories || true  # merge may produce conflicts

git checkout --ours .
git add .
git commit -m "Recovered local code and merged remote safely"

git push -u origin main

echo "Git recovery complete for $REPO_NAME"
echo "Backup snapshot is stored at $RECOVERY_DIR"
echo "Local code preserved and merged safely with remote."