Cli.tty_columns: def of cli@0.2.0.0
Import: import cli@0.2.0.0/cli.bend as Cli
Lines 7821-7827 of cli@0.2.0.0/cli.bend: https://jend.leeeet.dev/read.txt?path=cli@0.2.0.0/cli.bend&start_line=7821&end_line=7827

import Base

# stdout's columns if it is a TTY, else stderr's if it is one, else 0.
def tty_columns(out_tty: Bool, err_tty: Bool, out_cols: U32,
    err_cols: U32) -> Nat:
  match out_tty err_tty:
    case True{} _: U32.to_nat(out_cols)
    case False{} True{}: U32.to_nat(err_cols)
    case False{} False{}: 0n

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.to_nat