#! /bin/sh
#
# Copyright (C) 2003, 2005-2007, 2011, 2015 Free Software Foundation,
# Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

# Find a way to echo strings without interpreting backslash.
if test "X$(shell {echo '\t'} )" = 'X\t' {
  setvar echo = ''echo''
} else {
  if test "X$(shell {printf '%s\n' '\t'} )" = 'X\t' {
    setvar echo = ''printf %s\n''
  } else {
    proc echo_func {
      cat <<< """
$[join(ARGV)]
"""
    }
    setvar echo = ''echo_func''
  }
}

# This script is primarily a shell function library. In order for
# ". gettext.sh" to find it, we install it in $PREFIX/bin (that is usually
# contained in $PATH), rather than in some other location such as
# $PREFIX/share/sh-scripts or $PREFIX/share/gettext. In order to not violate
# the Filesystem Hierarchy Standard when doing so, this script is executable.
# Therefore it needs to support the standard --help and --version.
if test -z ${ZSH_VERSION+set} {
  # zsh is not POSIX compliant: By default, while ". gettext.sh" is executed,
  # it sets $0 to "gettext.sh", defeating the purpose of this test. But
  # fortunately we know that when running under zsh, this script is always
  # being sourced, not executed, because hardly anyone is crazy enough to
  # install zsh as /bin/sh.
  case (0) {
    gettext.sh | */gettext.sh | *\\gettext.sh {
      setvar progname = "$0"
      setvar package = 'gettext-runtime'
      setvar version = '0.19.7'
      # func_usage
      # outputs to stdout the --help usage message.
      proc func_usage {
        echo "GNU gettext shell script function library version $version"
        echo "Usage: . gettext.sh"
      }
      # func_version
      # outputs to stdout the --version message.
      proc func_version {
        echo "$progname (GNU $package) $version"
        echo "Copyright (C) 2003-2007 Free Software Foundation, Inc.
License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law."
        echo "Written by" "Bruno Haible"
      }
      if test $Argc = 1 {
        case (1) {
          --help | --hel | --he | --h  {
            func_usage; exit 0 }
          --version | --versio | --versi | --vers | --ver | --ve | --v  {
            func_version; exit 0 }
        }
      }
      func_usage 1>&2
      exit 1
      }
  }
}

# eval_gettext MSGID
# looks up the translation of MSGID and substitutes shell variables in the
# result.
proc eval_gettext {
  gettext $1 | shell {export PATH $(envsubst --variables $1); envsubst $1}
}

# eval_ngettext MSGID MSGID-PLURAL COUNT
# looks up the translation of MSGID / MSGID-PLURAL for COUNT and substitutes
# shell variables in the result.
proc eval_ngettext {
  ngettext $1 $2 $3 | shell {export PATH $(envsubst --variables "$1 $2); envsubst "$1 $2"}
}

# Note: This use of envsubst is much safer than using the shell built-in 'eval'
# would be.
# 1) The security problem with Chinese translations that happen to use a
#    character such as \xe0\x60 is avoided.
# 2) The security problem with malevolent translators who put in command lists
#    like "$(...)" or "`...`" is avoided.
# 3) The translations can only refer to shell variables that are already
#    mentioned in MSGID or MSGID-PLURAL.
#
# Note: "export PATH" above is a dummy; this is for the case when
# `envsubst --variables ...` returns nothing.
#
# Note: In eval_ngettext above, "$1 $2" means a string whose variables set is
# the union of the variables set of "$1" and "$2".
#
# Note: The minimal use of backquote above ensures that trailing newlines are
# not dropped, not from the gettext invocation and not from the value of any
# shell variable.
#
# Note: Field splitting on the `envsubst --variables ...` result is desired,
# since envsubst outputs the variables, separated by newlines. Pathname
# wildcard expansion or tilde expansion has no effect here, since the words
# output by "envsubst --variables ..." consist solely of alphanumeric
# characters and underscore.