Well, my full functions.sh won't fit in a comment, so here's 2 of my more unique functions that makes life a little easier when contributing to busy OSS projects:

# Git fork sync functions
# Assumes standard convention: origin = your fork, upstream = original repo
## Sync fork with upstream before starting work
gss() {
        # Safety checks
        if ! git rev-parse --git-dir >/dev/null 2>&1; then
                echo "❌ Not in a git repository"
                return 1
        fi

        # Check if we're in a git operation state
        local git_dir=$(git rev-parse --git-dir)
        if [[ -f "$git_dir/rebase-merge/interactive" ]] || [[ -d "$git_dir/rebase-apply" ]] || [[ -f "$git_dir/MERGE_HEAD" ]]; then
                echo "❌ Git operation in progress. Complete or abort current rebase/merge first:"
                echo "   git rebase --continue  (after resolving conflicts)"
                echo "   git rebase --abort     (to cancel rebase)"
                echo "   git merge --abort      (to cancel merge)"
                return 1
        fi

        # Check for uncommitted changes
        if ! git diff-index --quiet HEAD -- 2>/dev/null; then
                echo "❌ You have uncommitted changes. Commit or stash them first:"
                git status --porcelain
                echo ""
                echo "💡 Quick fix: git add . && git commit -m 'WIP' or git stash"
                return 1
        fi

        # Check for required remotes
        if ! git remote get-url upstream >/dev/null 2>&1; then
                echo "❌ No 'upstream' remote found. Add it first:"
                echo "   git remote add upstream <upstream-repo-url>"
                return 1
        fi

        if ! git remote get-url origin >/dev/null 2>&1; then
                echo "❌ No 'origin' remote found. Add it first:"
                echo "   git remote add origin <your-fork-url>"
                return 1
        fi

        local current_branch=$(git branch --show-current)

        # Ensure we have a main branch locally
        if ! git show-ref --verify --quiet refs/heads/main; then
                echo "❌ No local 'main' branch found. Create it first:"
                echo "   git checkout -b main upstream/main"
                return 1
        fi

        echo "🔄 Syncing fork with upstream..."
        echo "   Current branch: $current_branch"

        # Fetch with error handling
        if ! git fetch upstream; then
                echo "❌ Failed to fetch from upstream. Check network connection and remote URL."
                return 1
        fi

        echo "📌 Updating local main..."
        if ! git checkout main; then
                echo "❌ Failed to checkout main branch"
                return 1
        fi

        if ! git reset --hard upstream/main; then
                echo "❌ Failed to reset main to upstream/main"
                return 1
        fi

        echo "⬆️  Pushing updated main to fork..."
        if ! git push origin main; then
                echo "❌ Failed to push main to origin. Check push permissions."
                return 1
        fi

        echo "🔀 Rebasing feature branch on updated main..."
        if ! git checkout "$current_branch"; then
                echo "❌ Failed to checkout $current_branch"
                return 1
        fi

        if ! git rebase main; then
                echo "❌ Rebase failed due to conflicts. Resolve them and continue:"
                echo "   1. Edit conflicted files"
                echo "   2. git add <resolved-files>"
                echo "   3. git rebase --continue"
                echo "   Or: git rebase --abort to cancel"
                return 1
        fi

        echo "✅ Ready to work on branch: $current_branch"
}

## Sync fork and push feature branch
gsp() {
        # Safety checks
        if ! git rev-parse --git-dir >/dev/null 2>&1; then
                echo "❌ Not in a git repository"
                return 1
        fi

        local git_dir=$(git rev-parse --git-dir)
        if [[ -f "$git_dir/rebase-merge/interactive" ]] || [[ -d "$git_dir/rebase-apply" ]] || [[ -f "$git_dir/MERGE_HEAD" ]]; then
                echo "❌ Git operation in progress. Complete or abort first."
                return 1
        fi

        if ! git diff-index --quiet HEAD -- 2>/dev/null; then
                echo "❌ You have uncommitted changes. Commit or stash them first:"
                git status --porcelain
                return 1
        fi

        if ! git remote get-url upstream >/dev/null 2>&1; then
                echo "❌ No 'upstream' remote found"
                return 1
        fi

        if ! git remote get-url origin >/dev/null 2>&1; then
                echo "❌ No 'origin' remote found"
                return 1
        fi

        local current_branch=$(git branch --show-current)

        # Prevent pushing from main
        if [[ "$current_branch" == "main" ]]; then
                echo "❌ Cannot push from main branch. Switch to your feature branch first:"
                echo "   git checkout <your-feature-branch>"
                return 1
        fi

        # Show what we're about to do
        echo "⚠️  About to sync and push branch: $current_branch"
        echo "   This will:"
        echo "   • Fetch latest changes from upstream"
        echo "   • Rebase your branch on updated main"
        echo "   • Force-push to your fork (updates PR)"
        echo ""

        read -p "Continue? [y/N]: " -n 1 -r
        echo

        if [[ ! $REPLY =~ ^[Yy]$ ]]; then
                echo "❌ Operation cancelled"
                return 0
        fi

        echo "🔄 Final sync with upstream..."
        if ! git fetch upstream; then
                echo "❌ Failed to fetch from upstream"
                return 1
        fi

        echo "📌 Updating local main..."
        if ! git checkout main; then
                echo "❌ Failed to checkout main"
                return 1
        fi

        if ! git reset --hard upstream/main; then
                echo "❌ Failed to reset main"
                return 1
        fi

        if ! git push origin main; then
                echo "❌ Failed to push main to origin"
                return 1
        fi

        echo "🔀 Rebasing feature branch..."
        if ! git checkout "$current_branch"; then
                echo "❌ Failed to checkout $current_branch"
                return 1
        fi

        if ! git rebase main; then
                echo "❌ Rebase failed. Resolve conflicts and try again:"
                echo "   git add <resolved-files> && git rebase --continue"
                echo "   Then run 'gsp' again"
                return 1
        fi

        echo "🚀 Pushing feature branch to fork..."
        if ! git push origin "$current_branch" --force-with-lease; then
                echo "❌ Failed to push to origin. The branch may have been updated."
                echo "   Run 'git pull origin $current_branch' and try again"
                return 1
        fi

        echo "✅ Feature branch $current_branch successfully pushed to fork"
}