Onefetch Git Information on `cd`

README.md

Show Git Information when cding into a Git repository

1. Install onefetch by either:
   • Compiling it from scratch using the Rust compiler, Cargo: with the command cargo install onefetch
   • Downloading a pre-built binary from Onefetch's GitHub releases page (recommended) and placing it in your $PATH (such as /usr/local/bin/onefetch).
2. Add the snippet listed in onefetch_on_cd.sh to whatever file that gets run whenever you start a new Bash session. This differs per distro but common files include:
   • ~/.bashrc
   • ~/.bash_profile
   • sometimes ~/.bash_aliases?

Extra Information

Is this safe?

That depends.
Is it safe to blindly trust random code and programs from the internet?
I mean, what's the worst that could happen? Go on, do it. You know you want to.

Where did this come from?

From the Git repository where I store all my dotfiles, which includes lots more useful Bash aliases and shortcuts.
Start a dotfiles repo today, you'll be hooked forever! 🥳

Will it slow my computer down?

No, it's pretty fast. Unless you're cding into a massive repository like the Linux kernel which is several gigabytes in size and over 1.2 million commits. Then it takes about 20 seconds.

For normal web projects it's almost instant.

onefetch_on_cd.sh

## Add this to whatever file that gets run whenever you start a new Bash session
## Eg, `~/.bashrc` or `~/.bash_profile` etc.

## Keep a record of the last repository we cd'd into.
CD_LAST_REPO=""
## Git Repository Information on Directory Change
function cd {
    ## Perform the normal `cd` operation first. Return quickly if that fails (eg, directory does not exist).
    builtin cd "$@" || return;
    ## Only do this if both `git` and `onefetch` are installed.
    if command -v "onefetch" >"/dev/null" 2>&1 && command -v "git" >"/dev/null" 2>&1; then
        ## Get the directory of the Git repository we're in, regardless of how many directories we're nested in.
        if git rev-parse --show-toplevel >"/dev/null" 2>&1; then
            NEW_REPO="$(git rev-parse --show-toplevel 2>"/dev/null")"
            ## Only show information if we've cd'd into a _different_ repository.
            ## No need to display it every time we cd from `gitrepo` to `gitrepo/src`, etc.
            if [ "${CD_LAST_REPO}" != "${NEW_REPO}" ]; then
                ## Display Git repository information in all it's Rusty goodness.
                onefetch
                ## Remember the new Git repository we've cd'd into.
                CD_LAST_REPO="${NEW_REPO}"
            fi
        fi
    fi
}