dry run

I'm commenting on an issue that was already raised 3 years ago in #167, the scope of mine explains more and requests further things.

I'm want to see the release notes that green generates before committing. It is telling me that a release already exists, which is absolutely true, but I want to see what gren generates.

I can't do this because it's going to instantly overwrite the release notes for a release I've already pushed if I use the overwrite switch, this 100% not what I want to happen, I want to compare what I have against what green would generate.

The same is true of changelogs, although because green only creates them locally, it's not so much of an issue.

Please consider adding a --dry-run option.

I have been looking at the code, but I'm not really familiar with node and I can't get it to run from source, if I use npm start it complains that "./bin/gren.js" does not exist, which is absolutely true. There's no instructions that I could find in this repo on how to run it/build it/install it from source.

Bắt đầu bằng cách kiểm tra entry point npm start và đường dẫn bin/gren.js được tham chiếu, vì issue báo cáo rằng thiết lập mã nguồn không thể chạy. Theo dõi cách tạo release notes và changelogs cục bộ, sau đó xác minh rằng một dry run xem trước cả hai đầu ra mà không ghi đè một release hiện có.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.