rebar3/priv/templates/lib.template

{description, "OTP Library application (no processes)"}.
{variables, [
    {appid, "mylib", "Name of the OTP library application"},
    {desc, "An OTP library", "Short description of the app"}
]}.
{template, "mod.erl.dtl", "src/{{appid}}.erl"}.
{template, "otp_lib.app.src.dtl", "src/{{appid}}.app.src"}.
{template, "rebar.config.dtl", "rebar.config"}.
{template, "gitignore.dtl", ".gitignore"}.
{template, "LICENSE.dtl", "LICENSE"}.
{template, "README.md.dtl", "README.md"}.