Config git USER+EMAIL for every repository inside a directory

set_repo_user.sh

#!/bin/sh

GIT_USER="${GIT_USER:-My Name}"
GIT_EMAIL="${GIT_EMAIL:-mymail@users.noreply.github.com}"
INFO=${INFO:-yes}

DIR="${1:-.}"

apply_git_config() {
    target=$1
    [ -d "${target}/.git" ] || return

    (
        [ "x$INFO" = "xyes" ] && echo "INFO: Applying git config to ${DIR}/${target}"
        cd "${target}" || { echo "failed entering ${target}."; return; }
        git config user.name "$GIT_USER"
        git config user.email "$GIT_EMAIL"
    )
}

cd "$DIR" || { echo "\"$DIR\" is not a directory (or you have no permission)" ; exit 2 ; }
if [ -d .git ]; then
    apply_git_config .
else
    for repo in * ; do
        apply_git_config "$repo"
    done
fi