Undo n recent commits, or to a specified hash. Easy terminal ux to specify drop or revert (revert will make the undo show in history as a new commit, drop drops those commits)

git-undo

#!/bin/bash
set -e

# Check for uncommitted changes
if ! git diff --quiet HEAD --; then
    echo "Error: Uncommitted changes detected in the working directory or index." >&2
    echo "Please commit or stash your changes before running git-undo." >&2
    exit 1
fi

default_target="HEAD~1"

# Determine the target based on $2
if [ -z "$2" ]; then
    # $2 is empty, use default
    target="$default_target"
elif [[ "$2" =~ ^[0-9]+$ ]]; then
    # $2 is a number N, use HEAD~N
    target="HEAD~$2"
else
    # $2 is not a number, use it directly as commit-ish
    target="$2"
fi

if [ "$1" = "drop" ]; then
    echo "Resetting to $target"
    git reset --hard "$target"
elif [ "$1" = "revert" ]; then
    echo "Reverting commits from $target..HEAD"
    git revert --no-commit "$target"..HEAD
    git commit -m "Revert commits from $target..HEAD"
else
    echo "Usage: git-undo [drop|revert] [<target>]"
    echo "  <target> can be a commit hash, tag, branch, HEAD~N, or just N (defaults to 1, meaning HEAD~1)"
    # Indicate failure for incorrect usage
    exit 1
fi