#! @AM_TEST_RUNNER_SHELL@
# Copyright (C) 2012-2025 Free Software Foundation, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

# A "shell" that chokes on '-c' commands and/or shell scripts having
# a trailing '\' character (possibly followed by whitespace only).
# This is to emulate problems seen in older bash versions (e.g., bash
# 2.05b). See also automake bug#10436.

set -u

am_SHELL=${AM_TESTSUITE_SHELL-'@SHELL@'}

(
  set -e
  shell_command=; unset shell_command
  shell_script=; unset shell_script
  while test $# -gt 0; do
    case $1 in
      # The shell might be invoked by make e.g. as "sh -ec" or "sh -ce".
      # Be liberal (in the spirit of defensive programming) and accept
      # both forms.
      -*c*) shell_command=$2; shift;;
       -?*) ;;
         *) break;;
    esac
    shift
  done

  if test x${shell_command+"set"} != x"set"; then
    if test $# -gt 0; then
      shell_script=$1
      shell_command=$(cat <"$shell_script")
    else
      # Some make implementations, like *BSD's, pass the recipes to the
      # shell through its standard input.  Trying to run our extra checks
      # in this case would be too tricky, so we just skip them.
      exit 0
    fi
  fi
  original_shell_command=$shell_command

  tab='	'
  nl='
'
  case "$shell_command" in
    *" "|*"$tab"|*"$nl")
      shell_command=$(printf '%s\n' "$shell_command" | tr -d " $tab$nl");;
  esac

  case "$shell_command" in
    *\\)
      {
        printf '%s\n' "$0: recipe/script ends with backslash character"
        printf '%s\n' "=== BEGIN recipe/script"
        if test x${shell_script+"set"} = x"set"; then
          cat <"$shell_script"
        else
          printf '%s\n' "$original_shell_command"
        fi
        printf '%s\n' "=== END recipe/script"
      } >&2
      exit 1
      ;;
  esac
)

if test $? -gt 0; then
  # Some of our scripts or makefile recipes had invalid contents.
  exit 3
fi

exec ${AM_TESTSUITE_SHELL-'@SHELL@'} ${1+"$@"}
