Oper is a basic history tool for git repositories managed by google's git-repo tool.
It can show the history of the last n days across all managed git repositories.
Oper is inspired by tig, but is far for more basic. Don't expect any commands or additional views.
Oper is written in rust. You need the rust toolchain installed to be able to use it:
https://www.rust-lang.org/tools/install
Then you simply install oper with:
cargo install oper