Pull all git repositories in folder concurrently

pull-all.sh

#!/usr/bin/env bash

##
# pull-all
##
# AUTHOR: David J. Sequero
# Pull latest changes from all repositories within a directory.
#
# DEPENDENCIES
# - GNU parallel

REPOS_PATH="./"

if [[ ${1:0:1} == "-" ]]; then
    # Get the last argument passed (optional repo path)
    if [[ ${#} -gt 1 && -z "${@:-1}" ]]; then
        REPOS_PATH=${@:-1}
        # Get only the flags passed
        shift
    fi

    while getopts 'bh' OPTION
    do
        case ${OPTION} in
            b)  echo "Current branches:"
                for dir in `ls -d ${REPOS_PATH}*/`; do
                    pushd ${dir} &> /dev/null
                    BRANCH_NAME=$(git rev-parse --abbrev-ref HEAD)
                    echo "${dir} ===> ${BRANCH_NAME}"
                    popd &> /dev/null
                done
                exit 0
                ;;
            h)  cat <<_HELP_MSG
NAME
    pull-all - update all repositories located in specified directory

SYNOPSIS
    pull-all [-b] [path]
    
    Script defaults to current working directory if no path is supplied.

OPTIONS
    -b
        list current branches in specified directory (or CWD if none) without updating the trees
_HELP_MSG
                exit 0
                ;;
            ?)  echo "Unrecognised argument. Usage: pull-all [-b] [path]"
                exit 1
                ;;
        esac
    done
fi

function pullrepo() {
    pushd ${1} &> /dev/null
    echo "Pulling ${1} repo..."
    git pull
    
    if [[ ${?} == 0 ]]; then
        echo "Pulled ${1}"
    fi
    popd &> /dev/null
}

# Export the `pullrepo` function above so that it can be passed to `parallel`
export -f pullrepo

# Pull all repos under the directory simultaneously
ls -d ${REPOS_PATH}*/ | parallel pullrepo

# Wait for all jobs to complete
while [[ ! -z `jobs -r` ]]; do
    sleep 1
done

echo "Done."
exit 0