FreeBSD finally removed the last of the $Id$ in the source some months ago. I don't entirely know why they were so keen to do this but I'm sure they had a reason.
I don't see this, or binary .ident strings as e.g. clashing with idempotent builds.
I don't see this, or binary .ident strings as e.g. clashing with idempotent builds.
They were very useful when you were looking at a source file, to see what version of that file you had.
Git had something similar with Git Attributes[3], but AFAIK, they were just references to blob ids, so they never really took off.
For git, I now use tags (and versioning based on tags), that more or less replaced svn/cvs keyword substitution in the git ecosystem.
[1] - https://svnbook.red-bean.com/en/1.7/svn.advanced.props.speci...
[2] - https://www.gnu.org/software/trans-coord/manual/cvs/html_nod...
[3] - https://git-scm.com/book/en/v2/Customizing-Git-Git-Attribute...