tools/check-help.sh

   1 #!/bin/sh
   2 set -eu
   3
   4 export SYSTEMD_LOG_LEVEL=info
   5
   6 # output width
   7 if "$1"  --help | grep -v 'default:' | grep -E -q '.{80}.'; then
   8     echo "$(basename "$1") --help output is too wide:"
   9     "$1"  --help | awk 'length > 80' | grep -E --color=yes '.{80}'
  10     exit 1
  11 fi
  12
  13 # --help prints something. Also catches case where args are ignored.
  14 if ! "$1"  --help | grep -q .; then
  15     echo "$(basename "$1") --help output is empty."
  16     exit 2
  17 fi
  18
  19 # no --help output to stdout
  20 if "$1" --help 2>&1 1>/dev/null | grep .; then
  21     echo "$(basename "$1") --help prints to stderr"
  22     exit 3
  23 fi
  24
  25 # error output to stderr
  26 if ! "$1" --no-such-parameter 2>&1 1>/dev/null | grep -q .; then
  27     echo "$(basename "$1") with an unknown parameter does not print to stderr"
  28     exit 4
  29 fi