yegor256/gitted

AI Summary: The user is encountering a `ValueError: Invalid diff chunk format` when trying to generate a commit message after making many changes. The error occurs because the diff output contains unusual characters in the file paths, which the `gitted` library's `prepare_diff` function cannot parse correctly. This suggests an issue with how the diff is being generated or handled by the tool.

AI Summary: Modify the Git commit message generation scripts within the `gitted` project to exclude changes to large files (like `package-lock.json`) from the prompt sent to the OpenAI API. This prevents excessively long prompts that might exceed API limitations or negatively impact the quality of the generated commit message.

AI Summary: Implement a new function, `fail_it`, in the `commons.sh` script of the `gitted` project. This function should take a string as input, print it as a warning message, and then exit with a status code of 1. This will replace the current pattern of using `warn_it` followed by `exit 1`.

AI Summary: Enhance the `gitted` tool's `push` command to automatically create a GitHub pull request if one doesn't already exist for the branch. This involves checking for existing PRs using the GitHub CLI (`gh`), and creating a new PR if necessary. The solution should integrate seamlessly with the existing `gitted` workflow and handle potential errors gracefully.