Add --show option to print only the version number

External tools currently have to use grep and sed to extract the version number from the output of bump2version --list.

bump2version --dry-run --list patch | grep current_version | sed -r s,"^.*=",,

This is long and not very readable. Worse yet, Windows doesn’t offer grep or sed unless you install Cygwin/GnuWin32/Linux subsystem for Windows[/…] .

Because it’s a common need, I’d like to see (and can contribute) this instead:

# print current version
>>> bump2version --show
2.11.3
# print current version with modified serialization
>>> bump2version --show --serialize "Release {major}.{minor} patchlevel {patch}."
Release 2.11 patchlevel 3.
# print 'next' (bumped) version
>>> bump2version patch --show
2.11.4

I would propose that show enforces dry-run behavior so it never touches physical files. If you want to physically bump the version and also show it, you simply have to call bump2version two times.

[florisla]

Sorry it’s slow. I have a working branch but each time I want to make a pull request I’m not sure all the code in there is necessary or understandable.

I’ll aim for end of February for the pull request.

[tukataka]

@florisla Hello! It’s useful feature for me. Do you have estimation for it ?