Commit number as build number Git

Question

I have a private git repository that I do all of my staging on before pushing it up to Github. I have the following template

/**
 *
 * @version ${commit}
 * @since ${initial_commit}
 */
public class Foo {

}

What I want is to have the ${initial_commit} to be replaced with the commit number when the file was added to the repo, and every time there is a change, change the ${commit} to the resulting commit number. Is there some way to accomplish this? I saw another post about using a post-commit hook, but my thinking is that, the commit number (or value/hash) is calculated based on the changes, but by changing the values in the post-commit hook when committing to the public repo, it would have a different number. Or am I mistaken?

Answer 1

You are correct. The hash refelcts the content of the commit. This makes it impossible to have the hash number anywhere in the commited data.

You could wirte a script which replaces initial_commit with a hash. This of course requires a new commit.