confgit.sh

#!/bin/bash
# Author: Emil Lundberg <[email protected]> <https://keybase.io/emlun>
#
# This is free and unencumbered software released into the public domain.
# See http://unlicense.org/ for the full license.
#
# Usage:
#
#     $ confgit ls                        # List git repositories in ~/.config/
#     $ confgit foo init                  # Clone 'foo.git' from remote into ~/.config/foo/
#     $ confgit foo log --graph --all     # Use any git command in ~/.config/foo/
#     $ confgit - update                  # Fetch and fast-forward all repositories in ~/.config/

CONFIG_ROOT="${HOME}/.config"
PROGRAM="$0"
PROGRAM_NAME="$(basename $PROGRAM)"

namespace="$1"
shift
command="$1"

remotename='origin'
remotehost='myserver'
remotepath="~/git/config/${namespace}.git"
remoteurl="${remotehost}:${remotepath}"

branchname="$HOSTNAME"

confdir="${CONFIG_ROOT}/${namespace}"
git="git -C ${confdir}"

if [[ "$namespace" == '-' ]]; then
    case $command in
        ls)
            for d in $(find "${CONFIG_ROOT}"/* -maxdepth 0 -type d); do
                d=$(basename $d)
                if git -C "${CONFIG_ROOT}/${d}" rev-parse &>/dev/null; then
                    echo "$d"
                fi
            done
            exit 0
            ;;
        push|update)
            for d in $($PROGRAM - ls); do
                echo
                echo "$command $d"
                $PROGRAM "$d" $command
            done
            exit 0
            ;;
        *)
            echo 1>&2 "Cannot perform operation '$command' on all repositories"
            exit 1
            ;;
    esac
else
    case $command in
        init)
            git init "$confdir"
            $git checkout -b $branchname
            $git branch --set-upstream-to="${remotename}/${branchname}"

            trap 'exit $?' ERR
            if $git remote | grep $remotename; then
                $git remote rm $remotename;
            fi
            if $git remote add $remotename "$remoteurl"; then
                ssh "${remotehost}" "git init --bare ${remotepath}"
                $git fetch --all
            fi
            exit 0
            ;;
        update)
            trap 'exit $?' ERR
            $git fetch --all
            $git merge --ff-only "${remotename}/master"
            ;;
        *)
            $git "$@"
            exit $?
            ;;
    esac
fi