Allow using cargo install --git <url> to install latest tag

[Coekjan]

Problem

Users may want to install latest tagged version of binary from git repo. But they now must:

1. Browse to the repo and find the latest tag <tag>.
2. Run cargo install --git <url> --tag <tag>.

Proposed Solution

Maybe we can allow users to directly install the latest tag, like: cargo install --git <url> --tag latest. To implement this behavior, we need to query the git repo (like the following bash script), and take the latest one to install.

git -c 'versionsort.suffix=-' ls-remote --refs --tags --sort=version:refname $URL

Notes

No response

[epage]

We likely wouldn't want to assume a tag named latest doesn't exist. While generally people treat tags as immutable, there are exception cases.

As for version-sorting the tags, this doesn't work in monorepos. I tried this on a repo for one of my bin packages and the tags returned have nothing to do with my bin and could be much older than the latest tag for my bin.

[Coekjan]

I just realized that, at the most time, we can install the latest one from registry instead of git repo. So the proposal makes less sense.

If so, we can close the issue.