Git diff between latest and previous tag

Question

I want to do a diff just like this one.

The only difference is that i don't want to inform the tag names 'manually' i want them to be retrieved by git commands.

I know that git describe --tags returns my latest tag. But what about the previous one? How to get it?

Basically what i want is:

$ git diff $(git_command_to_get_previous_tag) $(git describe --tags)

And what i don't want:

$ git diff 1.0 2.0

Answer 1

You can get the latest tag using:

git tag --sort version:refname | tail -n 1

And the previous tag using:

git tag --sort version:refname | tail -n 2 | head -n 1

Putting it together, you can get a diff using this:

git diff $(git tag --sort version:refname | tail -n 2 | head -n 1) $(git tag --sort version:refname | tail -n 1)