restructured source for GitHub

4 files changed, 2483 insertions, 0 deletions

diff --git a/lib/shflags b/lib/shflags
new file mode 100644
index 0000000..9e69e64
--- /dev/null
+++ b/lib/shflags
@@ -0,0 +1,1156 @@
+# $Id: shflags 189 2013-01-15 00:13:10Z kate.ward@forestent.com $
+# vim:et:ft=sh:sts=2:sw=2
+#
+# Copyright 2008 Kate Ward. All Rights Reserved.
+# Released under the LGPL (GNU Lesser General Public License)
+#
+# shFlags -- Advanced command-line flag library for Unix shell scripts.
+# http://code.google.com/p/shflags/
+#
+# Author: kate.ward@forestent.com (Kate Ward)
+#
+# This module implements something like the google-gflags library available
+# from http://code.google.com/p/google-gflags/.
+#
+# FLAG TYPES: This is a list of the DEFINE_*'s that you can do.  All flags take
+# a name, default value, help-string, and optional 'short' name (one-letter
+# name).  Some flags have other arguments, which are described with the flag.
+#
+# DEFINE_string: takes any input, and intreprets it as a string.
+#
+# DEFINE_boolean: does not take any arguments. Say --myflag to set
+#   FLAGS_myflag to true, or --nomyflag to set FLAGS_myflag to false. For short
+#   flags, passing the flag on the command-line negates the default value, i.e.
+#   if the default is true, passing the flag sets the value to false.
+#
+# DEFINE_float: takes an input and intreprets it as a floating point number. As
+#   shell does not support floats per-se, the input is merely validated as
+#   being a valid floating point value.
+#
+# DEFINE_integer: takes an input and intreprets it as an integer.
+#
+# SPECIAL FLAGS: There are a few flags that have special meaning:
+#   --help (or -?)  prints a list of all the flags in a human-readable fashion
+#   --flagfile=foo  read flags from foo.  (not implemented yet)
+#   --              as in getopt(), terminates flag-processing
+#
+# EXAMPLE USAGE:
+#
+#   -- begin hello.sh --
+#   #! /bin/sh
+#   . ./shflags
+#   DEFINE_string name 'world' "somebody's name" n
+#   FLAGS "$@" || exit $?
+#   eval set -- "${FLAGS_ARGV}"
+#   echo "Hello, ${FLAGS_name}."
+#   -- end hello.sh --
+#
+#   $ ./hello.sh -n Kate
+#   Hello, Kate.
+#
+# CUSTOMIZABLE BEHAVIOR:
+#
+# A script can override the default 'getopt' command by providing the path to
+# an alternate implementation by defining the FLAGS_GETOPT_CMD variable.
+#
+# NOTES:
+#
+# * Not all systems include a getopt version that supports long flags. On these
+#   systems, only short flags are recognized.
+
+#==============================================================================
+# shFlags
+#
+# Shared attributes:
+#   flags_error:  last error message
+#   flags_output: last function output (rarely valid)
+#   flags_return: last return value
+#
+#   __flags_longNames: list of long names for all flags
+#   __flags_shortNames: list of short names for all flags
+#   __flags_boolNames: list of boolean flag names
+#
+#   __flags_opts: options parsed by getopt
+#
+# Per-flag attributes:
+#   FLAGS_<flag_name>: contains value of flag named 'flag_name'
+#   __flags_<flag_name>_default: the default flag value
+#   __flags_<flag_name>_help: the flag help string
+#   __flags_<flag_name>_short: the flag short name
+#   __flags_<flag_name>_type: the flag type
+#
+# Notes:
+# - lists of strings are space separated, and a null value is the '~' char.
+
+# return if FLAGS already loaded
+[ -n "${FLAGS_VERSION:-}" ] && return 0
+FLAGS_VERSION='1.0.4pre'
+
+# return values that scripts can use
+FLAGS_TRUE=0
+FLAGS_FALSE=1
+FLAGS_ERROR=2
+
+# determine some reasonable command defaults
+__FLAGS_UNAME_S=`uname -s`
+case "${__FLAGS_UNAME_S}" in
+  BSD) __FLAGS_EXPR_CMD='gexpr' ;;
+  *) __FLAGS_EXPR_CMD='expr' ;;
+esac
+
+# commands a user can override if needed
+FLAGS_EXPR_CMD=${FLAGS_EXPR_CMD:-${__FLAGS_EXPR_CMD}}
+FLAGS_GETOPT_CMD=${FLAGS_GETOPT_CMD:-getopt}
+
+# specific shell checks
+if [ -n "${ZSH_VERSION:-}" ]; then
+  setopt |grep "^shwordsplit$" >/dev/null
+  if [ $? -ne ${FLAGS_TRUE} ]; then
+    _flags_fatal 'zsh shwordsplit option is required for proper zsh operation'
+  fi
+  if [ -z "${FLAGS_PARENT:-}" ]; then
+    _flags_fatal "zsh does not pass \$0 through properly. please declare' \
+\"FLAGS_PARENT=\$0\" before calling shFlags"
+  fi
+fi
+
+# can we use built-ins?
+( echo "${FLAGS_TRUE#0}"; ) >/dev/null 2>&1
+if [ $? -eq ${FLAGS_TRUE} ]; then
+  __FLAGS_USE_BUILTIN=${FLAGS_TRUE}
+else
+  __FLAGS_USE_BUILTIN=${FLAGS_FALSE}
+fi
+
+#
+# constants
+#
+
+# reserved flag names
+__FLAGS_RESERVED_LIST=' ARGC ARGV ERROR FALSE GETOPT_CMD HELP PARENT TRUE '
+__FLAGS_RESERVED_LIST="${__FLAGS_RESERVED_LIST} VERSION "
+
+# getopt version
+__FLAGS_GETOPT_VERS_STD=0
+__FLAGS_GETOPT_VERS_ENH=1
+__FLAGS_GETOPT_VERS_BSD=2
+
+${FLAGS_GETOPT_CMD} >/dev/null 2>&1
+case $? in
+  0) __FLAGS_GETOPT_VERS=${__FLAGS_GETOPT_VERS_STD} ;;  # bsd getopt
+  2)
+    # TODO(kward): look into '-T' option to test the internal getopt() version
+    if [ "`${FLAGS_GETOPT_CMD} --version`" = '-- ' ]; then
+      __FLAGS_GETOPT_VERS=${__FLAGS_GETOPT_VERS_STD}
+    else
+      __FLAGS_GETOPT_VERS=${__FLAGS_GETOPT_VERS_ENH}
+    fi
+    ;;
+  *) _flags_fatal 'unable to determine getopt version' ;;
+esac
+
+# getopt optstring lengths
+__FLAGS_OPTSTR_SHORT=0
+__FLAGS_OPTSTR_LONG=1
+
+__FLAGS_NULL='~'
+
+# flag info strings
+__FLAGS_INFO_DEFAULT='default'
+__FLAGS_INFO_HELP='help'
+__FLAGS_INFO_SHORT='short'
+__FLAGS_INFO_TYPE='type'
+
+# flag lengths
+__FLAGS_LEN_SHORT=0
+__FLAGS_LEN_LONG=1
+
+# flag types
+__FLAGS_TYPE_NONE=0
+__FLAGS_TYPE_BOOLEAN=1
+__FLAGS_TYPE_FLOAT=2
+__FLAGS_TYPE_INTEGER=3
+__FLAGS_TYPE_STRING=4
+
+# set the constants readonly
+__flags_constants=`set |awk -F= '/^FLAGS_/ || /^__FLAGS_/ {print $1}'`
+for __flags_const in ${__flags_constants}; do
+  # skip certain flags
+  case ${__flags_const} in
+    FLAGS_HELP) continue ;;
+    FLAGS_PARENT) continue ;;
+  esac
+  # set flag readonly
+  if [ -z "${ZSH_VERSION:-}" ]; then
+    readonly ${__flags_const}
+  else  # handle zsh
+    case ${ZSH_VERSION} in
+      [123].*) readonly ${__flags_const} ;;
+      *) readonly -g ${__flags_const} ;;  # declare readonly constants globally
+    esac
+  fi
+done
+unset __flags_const __flags_constants
+
+#
+# internal variables
+#
+
+# space separated lists
+__flags_boolNames=' '  # boolean flag names
+__flags_longNames=' '  # long flag names
+__flags_shortNames=' '  # short flag names
+__flags_definedNames=' ' # defined flag names (used for validation)
+
+__flags_columns=''  # screen width in columns
+__flags_opts=''  # temporary storage for parsed getopt flags
+
+#------------------------------------------------------------------------------
+# private functions
+#
+
+# logging functions
+_flags_debug() { echo "flags:DEBUG $@" >&2; }
+_flags_warn() { echo "flags:WARN $@" >&2; }
+_flags_error() { echo "flags:ERROR $@" >&2; }
+_flags_fatal() { echo "flags:FATAL $@" >&2; exit ${FLAGS_ERROR}; }
+
+# Define a flag.
+#
+# Calling this function will define the following info variables for the
+# specified flag:
+#   FLAGS_flagname - the name for this flag (based upon the long flag name)
+#   __flags_<flag_name>_default - the default value
+#   __flags_flagname_help - the help string
+#   __flags_flagname_short - the single letter alias
+#   __flags_flagname_type - the type of flag (one of __FLAGS_TYPE_*)
+#
+# Args:
+#   _flags__type: integer: internal type of flag (__FLAGS_TYPE_*)
+#   _flags__name: string: long flag name
+#   _flags__default: default flag value
+#   _flags__help: string: help string
+#   _flags__short: string: (optional) short flag name
+# Returns:
+#   integer: success of operation, or error
+_flags_define()
+{
+  if [ $# -lt 4 ]; then
+    flags_error='DEFINE error: too few arguments'
+    flags_return=${FLAGS_ERROR}
+    _flags_error "${flags_error}"
+    return ${flags_return}
+  fi
+
+  _flags_type_=$1
+  _flags_name_=$2
+  _flags_default_=$3
+  _flags_help_=$4
+  _flags_short_=${5:-${__FLAGS_NULL}}
+
+  _flags_return_=${FLAGS_TRUE}
+  _flags_usName_=`_flags_underscoreName ${_flags_name_}`
+
+  # check whether the flag name is reserved
+  _flags_itemInList ${_flags_usName_} "${__FLAGS_RESERVED_LIST}"
+  if [ $? -eq ${FLAGS_TRUE} ]; then
+    flags_error="flag name (${_flags_name_}) is reserved"
+    _flags_return_=${FLAGS_ERROR}
+  fi
+
+  # require short option for getopt that don't support long options
+  if [ ${_flags_return_} -eq ${FLAGS_TRUE} \
+      -a ${__FLAGS_GETOPT_VERS} -ne ${__FLAGS_GETOPT_VERS_ENH} \
+      -a "${_flags_short_}" = "${__FLAGS_NULL}" ]
+  then
+    flags_error="short flag required for (${_flags_name_}) on this platform"
+    _flags_return_=${FLAGS_ERROR}
+  fi
+
+  # check for existing long name definition
+  if [ ${_flags_return_} -eq ${FLAGS_TRUE} ]; then
+    if _flags_itemInList ${_flags_usName_} ${__flags_definedNames}; then
+      flags_error="definition for ([no]${_flags_name_}) already exists"
+      _flags_warn "${flags_error}"
+      _flags_return_=${FLAGS_FALSE}
+    fi
+  fi
+
+  # check for existing short name definition
+  if [ ${_flags_return_} -eq ${FLAGS_TRUE} \
+      -a "${_flags_short_}" != "${__FLAGS_NULL}" ]
+  then
+    if _flags_itemInList "${_flags_short_}" ${__flags_shortNames}; then
+      flags_error="flag short name (${_flags_short_}) already defined"
+      _flags_warn "${flags_error}"
+      _flags_return_=${FLAGS_FALSE}
+    fi
+  fi
+
+  # handle default value. note, on several occasions the 'if' portion of an
+  # if/then/else contains just a ':' which does nothing. a binary reversal via
+  # '!' is not done because it does not work on all shells.
+  if [ ${_flags_return_} -eq ${FLAGS_TRUE} ]; then
+    case ${_flags_type_} in
+      ${__FLAGS_TYPE_BOOLEAN})
+        if _flags_validBool "${_flags_default_}"; then
+          case ${_flags_default_} in
+            true|t|0) _flags_default_=${FLAGS_TRUE} ;;
+            false|f|1) _flags_default_=${FLAGS_FALSE} ;;
+          esac
+        else
+          flags_error="invalid default flag value '${_flags_default_}'"
+          _flags_return_=${FLAGS_ERROR}
+        fi
+        ;;
+
+      ${__FLAGS_TYPE_FLOAT})
+        if _flags_validFloat "${_flags_default_}"; then
+          :
+        else
+          flags_error="invalid default flag value '${_flags_default_}'"
+          _flags_return_=${FLAGS_ERROR}
+        fi
+        ;;
+
+      ${__FLAGS_TYPE_INTEGER})
+        if _flags_validInt "${_flags_default_}"; then
+          :
+        else
+          flags_error="invalid default flag value '${_flags_default_}'"
+          _flags_return_=${FLAGS_ERROR}
+        fi
+        ;;
+
+      ${__FLAGS_TYPE_STRING}) ;;  # everything in shell is a valid string
+
+      *)
+        flags_error="unrecognized flag type '${_flags_type_}'"
+        _flags_return_=${FLAGS_ERROR}
+        ;;
+    esac
+  fi
+
+  if [ ${_flags_return_} -eq ${FLAGS_TRUE} ]; then
+    # store flag information
+    eval "FLAGS_${_flags_usName_}='${_flags_default_}'"
+    eval "__flags_${_flags_usName_}_${__FLAGS_INFO_TYPE}=${_flags_type_}"
+    eval "__flags_${_flags_usName_}_${__FLAGS_INFO_DEFAULT}=\
+\"${_flags_default_}\""
+    eval "__flags_${_flags_usName_}_${__FLAGS_INFO_HELP}=\"${_flags_help_}\""
+    eval "__flags_${_flags_usName_}_${__FLAGS_INFO_SHORT}='${_flags_short_}'"
+
+    # append flag names to name lists
+    __flags_shortNames="${__flags_shortNames}${_flags_short_} "
+    __flags_longNames="${__flags_longNames}${_flags_name_} "
+    [ ${_flags_type_} -eq ${__FLAGS_TYPE_BOOLEAN} ] && \
+        __flags_boolNames="${__flags_boolNames}no${_flags_name_} "
+
+    # append flag names to defined names for later validation checks
+    __flags_definedNames="${__flags_definedNames}${_flags_usName_} "
+    [ ${_flags_type_} -eq ${__FLAGS_TYPE_BOOLEAN} ] && \
+        __flags_definedNames="${__flags_definedNames}no${_flags_usName_} "
+  fi
+
+  flags_return=${_flags_return_}
+  unset _flags_default_ _flags_help_ _flags_name_ _flags_return_ \
+      _flags_short_ _flags_type_ _flags_usName_
+  [ ${flags_return} -eq ${FLAGS_ERROR} ] && _flags_error "${flags_error}"
+  return ${flags_return}
+}
+
+# Underscore a flag name by replacing dashes with underscores.
+#
+# Args:
+#   unnamed: string: log flag name
+# Output:
+#   string: underscored name
+_flags_underscoreName()
+{
+  echo $1 |tr '-' '_'
+}
+
+# Return valid getopt options using currently defined list of long options.
+#
+# This function builds a proper getopt option string for short (and long)
+# options, using the current list of long options for reference.
+#
+# Args:
+#   _flags_optStr: integer: option string type (__FLAGS_OPTSTR_*)
+# Output:
+#   string: generated option string for getopt
+# Returns:
+#   boolean: success of operation (always returns True)
+_flags_genOptStr()
+{
+  _flags_optStrType_=$1
+
+  _flags_opts_=''
+
+  for _flags_name_ in ${__flags_longNames}; do
+    _flags_usName_=`_flags_underscoreName ${_flags_name_}`
+    _flags_type_=`_flags_getFlagInfo ${_flags_usName_} ${__FLAGS_INFO_TYPE}`
+    [ $? -eq ${FLAGS_TRUE} ] || _flags_fatal 'call to _flags_type_ failed'
+    case ${_flags_optStrType_} in
+      ${__FLAGS_OPTSTR_SHORT})
+        _flags_shortName_=`_flags_getFlagInfo \
+            ${_flags_usName_} ${__FLAGS_INFO_SHORT}`
+        if [ "${_flags_shortName_}" != "${__FLAGS_NULL}" ]; then
+          _flags_opts_="${_flags_opts_}${_flags_shortName_}"
+          # getopt needs a trailing ':' to indicate a required argument
+          [ ${_flags_type_} -ne ${__FLAGS_TYPE_BOOLEAN} ] && \
+              _flags_opts_="${_flags_opts_}:"
+        fi
+        ;;
+
+      ${__FLAGS_OPTSTR_LONG})
+        _flags_opts_="${_flags_opts_:+${_flags_opts_},}${_flags_name_}"
+        # getopt needs a trailing ':' to indicate a required argument
+        [ ${_flags_type_} -ne ${__FLAGS_TYPE_BOOLEAN} ] && \
+            _flags_opts_="${_flags_opts_}:"
+        ;;
+    esac
+  done
+
+  echo "${_flags_opts_}"
+  unset _flags_name_ _flags_opts_ _flags_optStrType_ _flags_shortName_ \
+      _flags_type_ _flags_usName_
+  return ${FLAGS_TRUE}
+}
+
+# Returns flag details based on a flag name and flag info.
+#
+# Args:
+#   string: underscored flag name
+#   string: flag info (see the _flags_define function for valid info types)
+# Output:
+#   string: value of dereferenced flag variable
+# Returns:
+#   integer: one of FLAGS_{TRUE|FALSE|ERROR}
+_flags_getFlagInfo()
+{
+  # note: adding gFI to variable names to prevent naming conflicts with calling
+  # functions
+  _flags_gFI_usName_=$1
+  _flags_gFI_info_=$2
+
+  _flags_infoVar_="__flags_${_flags_gFI_usName_}_${_flags_gFI_info_}"
+  _flags_strToEval_="_flags_infoValue_=\"\${${_flags_infoVar_}:-}\""
+  eval "${_flags_strToEval_}"
+  if [ -n "${_flags_infoValue_}" ]; then
+    flags_return=${FLAGS_TRUE}
+  else
+    # see if the _flags_gFI_usName_ variable is a string as strings can be
+    # empty...
+    # note: the DRY principle would say to have this function call itself for
+    # the next three lines, but doing so results in an infinite loop as an
+    # invalid _flags_name_ will also not have the associated _type variable.
+    # Because it doesn't (it will evaluate to an empty string) the logic will
+    # try to find the _type variable of the _type variable, and so on. Not so
+    # good ;-)
+    _flags_typeVar_="__flags_${_flags_gFI_usName_}_${__FLAGS_INFO_TYPE}"
+    _flags_strToEval_="_flags_typeValue_=\"\${${_flags_typeVar_}:-}\""
+    eval "${_flags_strToEval_}"
+    if [ "${_flags_typeValue_}" = "${__FLAGS_TYPE_STRING}" ]; then
+      flags_return=${FLAGS_TRUE}
+    else
+      flags_return=${FLAGS_ERROR}
+      flags_error="missing flag info variable (${_flags_infoVar_})"
+    fi
+  fi
+
+  echo "${_flags_infoValue_}"
+  unset _flags_gFI_usName_ _flags_gfI_info_ _flags_infoValue_ _flags_infoVar_ \
+      _flags_strToEval_ _flags_typeValue_ _flags_typeVar_
+  [ ${flags_return} -eq ${FLAGS_ERROR} ] && _flags_error "${flags_error}"
+  return ${flags_return}
+}
+
+# Check for presense of item in a list.
+#
+# Passed a string (e.g. 'abc'), this function will determine if the string is
+# present in the list of strings (e.g.  ' foo bar abc ').
+#
+# Args:
+#   _flags_str_: string: string to search for in a list of strings
+#   unnamed: list: list of strings
+# Returns:
+#   boolean: true if item is in the list
+_flags_itemInList() {
+  _flags_str_=$1
+  shift
+
+  echo " ${*:-} " |grep " ${_flags_str_} " >/dev/null
+  if [ $? -eq 0 ]; then
+    flags_return=${FLAGS_TRUE}
+  else
+    flags_return=${FLAGS_FALSE}
+  fi
+
+  unset _flags_str_
+  return ${flags_return}
+}
+
+# Returns the width of the current screen.
+#
+# Output:
+#   integer: width in columns of the current screen.
+_flags_columns()
+{
+  if [ -z "${__flags_columns}" ]; then
+    # determine the value and store it
+    if eval stty size >/dev/null 2>&1; then
+      # stty size worked :-)
+      set -- `stty size`
+      __flags_columns=$2
+    elif eval tput cols >/dev/null 2>&1; then
+      set -- `tput cols`
+      __flags_columns=$1
+    else
+      __flags_columns=80  # default terminal width
+    fi
+  fi
+  echo ${__flags_columns}
+}
+
+# Validate a boolean.
+#
+# Args:
+#   _flags__bool: boolean: value to validate
+# Returns:
+#   bool: true if the value is a valid boolean
+_flags_validBool()
+{
+  _flags_bool_=$1
+
+  flags_return=${FLAGS_TRUE}
+  case "${_flags_bool_}" in
+    true|t|0) ;;
+    false|f|1) ;;
+    *) flags_return=${FLAGS_FALSE} ;;
+  esac
+
+  unset _flags_bool_
+  return ${flags_return}
+}
+
+# Validate a float.
+#
+# Args:
+#   _flags_float_: float: value to validate
+# Returns:
+#   bool: true if the value is a valid integer
+_flags_validFloat()
+{
+  flags_return=${FLAGS_FALSE}
+  [ -n "$1" ] || return ${flags_return}
+  _flags_float_=$1
+
+  if _flags_validInt ${_flags_float_}; then
+    flags_return=${FLAGS_TRUE}
+  elif _flags_useBuiltin; then
+    _flags_float_whole_=${_flags_float_%.*}
+    _flags_float_fraction_=${_flags_float_#*.}
+    if _flags_validInt ${_flags_float_whole_:-0} -a \
+      _flags_validInt ${_flags_float_fraction_}; then
+      flags_return=${FLAGS_TRUE}
+    fi
+    unset _flags_float_whole_ _flags_float_fraction_
+  else
+    flags_return=${FLAGS_TRUE}
+    case ${_flags_float_} in
+      -*)  # negative floats
+        _flags_test_=`${FLAGS_EXPR_CMD} -- "${_flags_float_}" :\
+            '\(-[0-9]*\.[0-9]*\)'`
+        ;;
+      *)  # positive floats
+        _flags_test_=`${FLAGS_EXPR_CMD} -- "${_flags_float_}" :\
+            '\([0-9]*\.[0-9]*\)'`
+        ;;
+    esac
+    [ "${_flags_test_}" != "${_flags_float_}" ] && flags_return=${FLAGS_FALSE}
+    unset _flags_test_
+  fi
+
+  unset _flags_float_ _flags_float_whole_ _flags_float_fraction_
+  return ${flags_return}
+}
+
+# Validate an integer.
+#
+# Args:
+#   _flags_int_: integer: value to validate
+# Returns:
+#   bool: true if the value is a valid integer
+_flags_validInt()
+{
+  flags_return=${FLAGS_FALSE}
+  [ -n "$1" ] || return ${flags_return}
+  _flags_int_=$1
+
+  case ${_flags_int_} in
+    -*.*) ;;  # ignore negative floats (we'll invalidate them later)
+    -*)  # strip possible leading negative sign
+      if _flags_useBuiltin; then
+        _flags_int_=${_flags_int_#-}
+      else
+        _flags_int_=`${FLAGS_EXPR_CMD} -- "${_flags_int_}" : '-\([0-9][0-9]*\)'`
+      fi
+      ;;
+  esac
+
+  case ${_flags_int_} in
+    *[!0-9]*) flags_return=${FLAGS_FALSE} ;;
+    *) flags_return=${FLAGS_TRUE} ;;
+  esac
+
+  unset _flags_int_
+  return ${flags_return}
+}
+
+# Parse command-line options using the standard getopt.
+#
+# Note: the flag options are passed around in the global __flags_opts so that
+# the formatting is not lost due to shell parsing and such.
+#
+# Args:
+#   @: varies: command-line options to parse
+# Returns:
+#   integer: a FLAGS success condition
+_flags_getoptStandard()
+{
+  flags_return=${FLAGS_TRUE}
+  _flags_shortOpts_=`_flags_genOptStr ${__FLAGS_OPTSTR_SHORT}`
+
+  # check for spaces in passed options
+  for _flags_opt_ in "$@"; do
+    # note: the silliness with the x's is purely for ksh93 on Ubuntu 6.06
+    _flags_match_=`echo "x${_flags_opt_}x" |sed 's/ //g'`
+    if [ "${_flags_match_}" != "x${_flags_opt_}x" ]; then
+      flags_error='the available getopt does not support spaces in options'
+      flags_return=${FLAGS_ERROR}
+      break
+    fi
+  done
+
+  if [ ${flags_return} -eq ${FLAGS_TRUE} ]; then
+    __flags_opts=`getopt ${_flags_shortOpts_} $@ 2>&1`
+    _flags_rtrn_=$?
+    if [ ${_flags_rtrn_} -ne ${FLAGS_TRUE} ]; then
+      _flags_warn "${__flags_opts}"
+      flags_error='unable to parse provided options with getopt.'
+      flags_return=${FLAGS_ERROR}
+    fi
+  fi
+
+  unset _flags_match_ _flags_opt_ _flags_rtrn_ _flags_shortOpts_
+  return ${flags_return}
+}
+
+# Parse command-line options using the enhanced getopt.
+#
+# Note: the flag options are passed around in the global __flags_opts so that
+# the formatting is not lost due to shell parsing and such.
+#
+# Args:
+#   @: varies: command-line options to parse
+# Returns:
+#   integer: a FLAGS success condition
+_flags_getoptEnhanced()
+{
+  flags_return=${FLAGS_TRUE}
+  _flags_shortOpts_=`_flags_genOptStr ${__FLAGS_OPTSTR_SHORT}`
+  _flags_boolOpts_=`echo "${__flags_boolNames}" \
+      |sed 's/^ *//;s/ *$//;s/ /,/g'`
+  _flags_longOpts_=`_flags_genOptStr ${__FLAGS_OPTSTR_LONG}`
+
+  __flags_opts=`${FLAGS_GETOPT_CMD} \
+      -o ${_flags_shortOpts_} \
+      -l "${_flags_longOpts_},${_flags_boolOpts_}" \
+      -- "$@" 2>&1`
+  _flags_rtrn_=$?
+  if [ ${_flags_rtrn_} -ne ${FLAGS_TRUE} ]; then
+    _flags_warn "${__flags_opts}"
+    flags_error='unable to parse provided options with getopt.'
+    flags_return=${FLAGS_ERROR}
+  fi
+
+  unset _flags_boolOpts_ _flags_longOpts_ _flags_rtrn_ _flags_shortOpts_
+  return ${flags_return}
+}
+
+# Dynamically parse a getopt result and set appropriate variables.
+#
+# This function does the actual conversion of getopt output and runs it through
+# the standard case structure for parsing. The case structure is actually quite
+# dynamic to support any number of flags.
+#
+# Args:
+#   argc: int: original command-line argument count
+#   @: varies: output from getopt parsing
+# Returns:
+#   integer: a FLAGS success condition
+_flags_parseGetopt()
+{
+  _flags_argc_=$1
+  shift
+
+  flags_return=${FLAGS_TRUE}
+
+  if [ ${__FLAGS_GETOPT_VERS} -ne ${__FLAGS_GETOPT_VERS_ENH} ]; then
+    set -- $@
+  else
+    # note the quotes around the `$@' -- they are essential!
+    eval set -- "$@"
+  fi
+
+  # Provide user with the number of arguments to shift by later.
+  # NOTE: the FLAGS_ARGC variable is obsolete as of 1.0.3 because it does not
+  # properly give user access to non-flag arguments mixed in between flag
+  # arguments. Its usage was replaced by FLAGS_ARGV, and it is being kept only
+  # for backwards compatibility reasons.
+  FLAGS_ARGC=`_flags_math "$# - 1 - ${_flags_argc_}"`
+
+  # handle options. note options with values must do an additional shift
+  while true; do
+    _flags_opt_=$1
+    _flags_arg_=${2:-}
+    _flags_type_=${__FLAGS_TYPE_NONE}
+    _flags_name_=''
+
+    # determine long flag name
+    case "${_flags_opt_}" in
+      --) shift; break ;;  # discontinue option parsing
+
+      --*)  # long option
+        if _flags_useBuiltin; then
+          _flags_opt_=${_flags_opt_#*--}
+        else
+          _flags_opt_=`${FLAGS_EXPR_CMD} -- "${_flags_opt_}" : '--\(.*\)'`
+        fi
+        _flags_len_=${__FLAGS_LEN_LONG}
+        if _flags_itemInList "${_flags_opt_}" ${__flags_longNames}; then
+          _flags_name_=${_flags_opt_}
+        else
+          # check for negated long boolean version
+          if _flags_itemInList "${_flags_opt_}" ${__flags_boolNames}; then
+            if _flags_useBuiltin; then
+              _flags_name_=${_flags_opt_#*no}
+            else
+              _flags_name_=`${FLAGS_EXPR_CMD} -- "${_flags_opt_}" : 'no\(.*\)'`
+            fi
+            _flags_type_=${__FLAGS_TYPE_BOOLEAN}
+            _flags_arg_=${__FLAGS_NULL}
+          fi
+        fi
+        ;;
+
+      -*)  # short option
+        if _flags_useBuiltin; then
+          _flags_opt_=${_flags_opt_#*-}
+        else
+          _flags_opt_=`${FLAGS_EXPR_CMD} -- "${_flags_opt_}" : '-\(.*\)'`
+        fi
+        _flags_len_=${__FLAGS_LEN_SHORT}
+        if _flags_itemInList "${_flags_opt_}" ${__flags_shortNames}; then
+          # yes. match short name to long name. note purposeful off-by-one
+          # (too high) with awk calculations.
+          _flags_pos_=`echo "${__flags_shortNames}" \
+              |awk 'BEGIN{RS=" ";rn=0}$0==e{rn=NR}END{print rn}' \
+                  e=${_flags_opt_}`
+          _flags_name_=`echo "${__flags_longNames}" \
+              |awk 'BEGIN{RS=" "}rn==NR{print $0}' rn="${_flags_pos_}"`
+        fi
+        ;;
+    esac
+
+    # die if the flag was unrecognized
+    if [ -z "${_flags_name_}" ]; then
+      flags_error="unrecognized option (${_flags_opt_})"
+      flags_return=${FLAGS_ERROR}
+      break
+    fi
+
+    # set new flag value
+    _flags_usName_=`_flags_underscoreName ${_flags_name_}`
+    [ ${_flags_type_} -eq ${__FLAGS_TYPE_NONE} ] && \
+        _flags_type_=`_flags_getFlagInfo \
+            "${_flags_usName_}" ${__FLAGS_INFO_TYPE}`
+    case ${_flags_type_} in
+      ${__FLAGS_TYPE_BOOLEAN})
+        if [ ${_flags_len_} -eq ${__FLAGS_LEN_LONG} ]; then
+          if [ "${_flags_arg_}" != "${__FLAGS_NULL}" ]; then
+            eval "FLAGS_${_flags_usName_}=${FLAGS_TRUE}"
+          else
+            eval "FLAGS_${_flags_usName_}=${FLAGS_FALSE}"
+          fi
+        else
+          _flags_strToEval_="_flags_val_=\
+\${__flags_${_flags_usName_}_${__FLAGS_INFO_DEFAULT}}"
+          eval "${_flags_strToEval_}"
+          if [ ${_flags_val_} -eq ${FLAGS_FALSE} ]; then
+            eval "FLAGS_${_flags_usName_}=${FLAGS_TRUE}"
+          else
+            eval "FLAGS_${_flags_usName_}=${FLAGS_FALSE}"
+          fi
+        fi
+        ;;
+
+      ${__FLAGS_TYPE_FLOAT})
+        if _flags_validFloat "${_flags_arg_}"; then
+          eval "FLAGS_${_flags_usName_}='${_flags_arg_}'"
+        else
+          flags_error="invalid float value (${_flags_arg_})"
+          flags_return=${FLAGS_ERROR}
+          break
+        fi
+        ;;
+
+      ${__FLAGS_TYPE_INTEGER})
+        if _flags_validInt "${_flags_arg_}"; then
+          eval "FLAGS_${_flags_usName_}='${_flags_arg_}'"
+        else
+          flags_error="invalid integer value (${_flags_arg_})"
+          flags_return=${FLAGS_ERROR}
+          break
+        fi
+        ;;
+
+      ${__FLAGS_TYPE_STRING})
+        eval "FLAGS_${_flags_usName_}='${_flags_arg_}'"
+        ;;
+    esac
+
+    # handle special case help flag
+    if [ "${_flags_usName_}" = 'help' ]; then
+      if [ ${FLAGS_help} -eq ${FLAGS_TRUE} ]; then
+        flags_help
+        flags_error='help requested'
+        flags_return=${FLAGS_TRUE}
+        break
+      fi
+    fi
+
+    # shift the option and non-boolean arguements out.
+    shift
+    [ ${_flags_type_} != ${__FLAGS_TYPE_BOOLEAN} ] && shift
+  done
+
+  # give user back non-flag arguments
+  FLAGS_ARGV=''
+  while [ $# -gt 0 ]; do
+    FLAGS_ARGV="${FLAGS_ARGV:+${FLAGS_ARGV} }'$1'"
+    shift
+  done
+
+  unset _flags_arg_ _flags_len_ _flags_name_ _flags_opt_ _flags_pos_ \
+      _flags_strToEval_ _flags_type_ _flags_usName_ _flags_val_
+  return ${flags_return}
+}
+
+# Perform some path using built-ins.
+#
+# Args:
+#   $@: string: math expression to evaluate
+# Output:
+#   integer: the result
+# Returns:
+#   bool: success of math evaluation
+_flags_math()
+{
+  if [ $# -eq 0 ]; then
+    flags_return=${FLAGS_FALSE}
+  elif _flags_useBuiltin; then
+    # Variable assignment is needed as workaround for Solaris Bourne shell,
+    # which cannot parse a bare $((expression)).
+    _flags_expr_='$(($@))'
+    eval echo ${_flags_expr_}
+    flags_return=$?
+    unset _flags_expr_
+  else
+    eval expr $@
+    flags_return=$?
+  fi
+
+  return ${flags_return}
+}
+
+# Cross-platform strlen() implementation.
+#
+# Args:
+#   _flags_str: string: to determine length of
+# Output:
+#   integer: length of string
+# Returns:
+#   bool: success of strlen evaluation
+_flags_strlen()
+{
+  _flags_str_=${1:-}
+
+  if [ -z "${_flags_str_}" ]; then
+    flags_output=0
+  elif _flags_useBuiltin; then
+    flags_output=${#_flags_str_}
+  else
+    flags_output=`${FLAGS_EXPR_CMD} -- "${_flags_str_}" : '.*'`
+  fi
+  flags_return=$?
+
+  unset _flags_str_
+  echo ${flags_output}
+  return ${flags_return}
+}
+
+# Use built-in helper function to enable unit testing.
+#
+# Args:
+#   None
+# Returns:
+#   bool: true if built-ins should be used
+_flags_useBuiltin()
+{
+  return ${__FLAGS_USE_BUILTIN}
+}
+
+#------------------------------------------------------------------------------
+# public functions
+# 
+# A basic boolean flag. Boolean flags do not take any arguments, and their
+# value is either 1 (false) or 0 (true). For long flags, the false value is
+# specified on the command line by prepending the word 'no'. With short flags,
+# the presense of the flag toggles the current value between true and false.
+# Specifying a short boolean flag twice on the command results in returning the
+# value back to the default value.
+#
+# A default value is required for boolean flags.
+#
+# For example, lets say a Boolean flag was created whose long name was 'update'
+# and whose short name was 'x', and the default value was 'false'. This flag
+# could be explicitly set to 'true' with '--update' or by '-x', and it could be
+# explicitly set to 'false' with '--noupdate'.
+DEFINE_boolean() { _flags_define ${__FLAGS_TYPE_BOOLEAN} "$@"; }
+
+# Other basic flags.
+DEFINE_float()   { _flags_define ${__FLAGS_TYPE_FLOAT} "$@"; }
+DEFINE_integer() { _flags_define ${__FLAGS_TYPE_INTEGER} "$@"; }
+DEFINE_string()  { _flags_define ${__FLAGS_TYPE_STRING} "$@"; }
+
+# Parse the flags.
+#
+# Args:
+#   unnamed: list: command-line flags to parse
+# Returns:
+#   integer: success of operation, or error
+FLAGS()
+{
+  # define a standard 'help' flag if one isn't already defined
+  [ -z "${__flags_help_type:-}" ] && \
+      DEFINE_boolean 'help' false 'show this help' 'h'
+
+  # parse options
+  if [ $# -gt 0 ]; then
+    if [ ${__FLAGS_GETOPT_VERS} -ne ${__FLAGS_GETOPT_VERS_ENH} ]; then
+      _flags_getoptStandard "$@"
+    else
+      _flags_getoptEnhanced "$@"
+    fi
+    flags_return=$?
+  else
+    # nothing passed; won't bother running getopt
+    __flags_opts='--'
+    flags_return=${FLAGS_TRUE}
+  fi
+
+  if [ ${flags_return} -eq ${FLAGS_TRUE} ]; then
+    _flags_parseGetopt $# "${__flags_opts}"
+    flags_return=$?
+  fi
+
+  [ ${flags_return} -eq ${FLAGS_ERROR} ] && _flags_fatal "${flags_error}"
+  return ${flags_return}
+}
+
+# This is a helper function for determining the 'getopt' version for platforms
+# where the detection isn't working. It simply outputs debug information that
+# can be included in a bug report.
+#
+# Args:
+#   none
+# Output:
+#   debug info that can be included in a bug report
+# Returns:
+#   nothing
+flags_getoptInfo()
+{
+  # platform info
+  _flags_debug "uname -a: `uname -a`"
+  _flags_debug "PATH: ${PATH}"
+
+  # shell info
+  if [ -n "${BASH_VERSION:-}" ]; then
+    _flags_debug 'shell: bash'
+    _flags_debug "BASH_VERSION: ${BASH_VERSION}"
+  elif [ -n "${ZSH_VERSION:-}" ]; then
+    _flags_debug 'shell: zsh'
+    _flags_debug "ZSH_VERSION: ${ZSH_VERSION}"
+  fi
+
+  # getopt info
+  ${FLAGS_GETOPT_CMD} >/dev/null
+  _flags_getoptReturn=$?
+  _flags_debug "getopt return: ${_flags_getoptReturn}"
+  _flags_debug "getopt --version: `${FLAGS_GETOPT_CMD} --version 2>&1`"
+
+  unset _flags_getoptReturn
+}
+
+# Returns whether the detected getopt version is the enhanced version.
+#
+# Args:
+#   none
+# Output:
+#   none
+# Returns:
+#   bool: true if getopt is the enhanced version
+flags_getoptIsEnh()
+{
+  test ${__FLAGS_GETOPT_VERS} -eq ${__FLAGS_GETOPT_VERS_ENH}
+}
+
+# Returns whether the detected getopt version is the standard version.
+#
+# Args:
+#   none
+# Returns:
+#   bool: true if getopt is the standard version
+flags_getoptIsStd()
+{
+  test ${__FLAGS_GETOPT_VERS} -eq ${__FLAGS_GETOPT_VERS_STD}
+}
+
+# This is effectively a 'usage()' function. It prints usage information and
+# exits the program with ${FLAGS_FALSE} if it is ever found in the command line
+# arguments. Note this function can be overridden so other apps can define
+# their own --help flag, replacing this one, if they want.
+#
+# Args:
+#   none
+# Returns:
+#   integer: success of operation (always returns true)
+flags_help()
+{
+  if [ -n "${FLAGS_HELP:-}" ]; then
+    echo "${FLAGS_HELP}" >&2
+  else
+    echo "USAGE: ${FLAGS_PARENT:-$0} [flags] args" >&2
+  fi
+  if [ -n "${__flags_longNames}" ]; then
+    echo 'flags:' >&2
+    for flags_name_ in ${__flags_longNames}; do
+      flags_flagStr_=''
+      flags_boolStr_=''
+      flags_usName_=`_flags_underscoreName ${flags_name_}`
+
+      flags_default_=`_flags_getFlagInfo \
+          "${flags_usName_}" ${__FLAGS_INFO_DEFAULT}`
+      flags_help_=`_flags_getFlagInfo \
+          "${flags_usName_}" ${__FLAGS_INFO_HELP}`
+      flags_short_=`_flags_getFlagInfo \
+          "${flags_usName_}" ${__FLAGS_INFO_SHORT}`
+      flags_type_=`_flags_getFlagInfo \
+          "${flags_usName_}" ${__FLAGS_INFO_TYPE}`
+
+      [ "${flags_short_}" != "${__FLAGS_NULL}" ] && \
+          flags_flagStr_="-${flags_short_}"
+
+      if [ ${__FLAGS_GETOPT_VERS} -eq ${__FLAGS_GETOPT_VERS_ENH} ]; then
+        [ "${flags_short_}" != "${__FLAGS_NULL}" ] && \
+            flags_flagStr_="${flags_flagStr_},"
+        # add [no] to long boolean flag names, except the 'help' flag
+        [ ${flags_type_} -eq ${__FLAGS_TYPE_BOOLEAN} \
+          -a "${flags_usName_}" != 'help' ] && \
+            flags_boolStr_='[no]'
+        flags_flagStr_="${flags_flagStr_}--${flags_boolStr_}${flags_name_}:"
+      fi
+
+      case ${flags_type_} in
+        ${__FLAGS_TYPE_BOOLEAN})
+          if [ ${flags_default_} -eq ${FLAGS_TRUE} ]; then
+            flags_defaultStr_='true'
+          else
+            flags_defaultStr_='false'
+          fi
+          ;;
+        ${__FLAGS_TYPE_FLOAT}|${__FLAGS_TYPE_INTEGER})
+          flags_defaultStr_=${flags_default_} ;;
+        ${__FLAGS_TYPE_STRING}) flags_defaultStr_="'${flags_default_}'" ;;
+      esac
+      flags_defaultStr_="(default: ${flags_defaultStr_})"
+
+      flags_helpStr_="  ${flags_flagStr_}  ${flags_help_} ${flags_defaultStr_}"
+      _flags_strlen "${flags_helpStr_}" >/dev/null
+      flags_helpStrLen_=${flags_output}
+      flags_columns_=`_flags_columns`
+
+      if [ ${flags_helpStrLen_} -lt ${flags_columns_} ]; then
+        echo "${flags_helpStr_}" >&2
+      else
+        echo "  ${flags_flagStr_}  ${flags_help_}" >&2
+        # note: the silliness with the x's is purely for ksh93 on Ubuntu 6.06
+        # because it doesn't like empty strings when used in this manner.
+        flags_emptyStr_="`echo \"x${flags_flagStr_}x\" \
+            |awk '{printf "%"length($0)-2"s", ""}'`"
+        flags_helpStr_="  ${flags_emptyStr_}  ${flags_defaultStr_}"
+        _flags_strlen "${flags_helpStr_}" >/dev/null
+        flags_helpStrLen_=${flags_output}
+
+        if [ ${__FLAGS_GETOPT_VERS} -eq ${__FLAGS_GETOPT_VERS_STD} \
+            -o ${flags_helpStrLen_} -lt ${flags_columns_} ]; then
+          # indented to match help string
+          echo "${flags_helpStr_}" >&2
+        else
+          # indented four from left to allow for longer defaults as long flag
+          # names might be used too, making things too long
+          echo "    ${flags_defaultStr_}" >&2
+        fi
+      fi
+    done
+  fi
+
+  unset flags_boolStr_ flags_default_ flags_defaultStr_ flags_emptyStr_ \
+      flags_flagStr_ flags_help_ flags_helpStr flags_helpStrLen flags_name_ \
+      flags_columns_ flags_short_ flags_type_ flags_usName_
+  return ${FLAGS_TRUE}
+}
+
+# Reset shflags back to an uninitialized state.
+#
+# Args:
+#   none
+# Returns:
+#   nothing
+flags_reset()
+{
+  for flags_name_ in ${__flags_longNames}; do
+    flags_usName_=`_flags_underscoreName ${flags_name_}`
+    flags_strToEval_="unset FLAGS_${flags_usName_}"
+    for flags_type_ in \
+        ${__FLAGS_INFO_DEFAULT} \
+        ${__FLAGS_INFO_HELP} \
+        ${__FLAGS_INFO_SHORT} \
+        ${__FLAGS_INFO_TYPE}
+    do
+      flags_strToEval_=\
+"${flags_strToEval_} __flags_${flags_usName_}_${flags_type_}"
+    done
+    eval ${flags_strToEval_}
+  done
+
+  # reset internal variables
+  __flags_boolNames=' '
+  __flags_longNames=' '
+  __flags_shortNames=' '
+  __flags_definedNames=' '
+
+  unset flags_name_ flags_type_ flags_strToEval_ flags_usName_
+}
diff --git a/lib/shlib b/lib/shlib
new file mode 100644
index 0000000..d294636
--- /dev/null
+++ b/lib/shlib
@@ -0,0 +1,40 @@
+# $Id: shlib 14 2007-02-18 19:43:41Z sfsetse $
+# vim:et:ft=sh:sts=2:sw=2
+#
+# Copyright 2011 Kate Ward. All Rights Reserved.
+# Released under the LGPL (GNU Lesser General Public License).
+#
+# Author: kate.ward@forestent.com (Kate Ward)
+#
+# Library of shell functions.
+
+# Convert a relative path into it's absolute equivalent.
+#
+# This function will automatically prepend the current working directory if the
+# path is not already absolute. It then removes all parent references (../) to
+# reconstruct the proper absolute path.
+#
+# Args:
+#   shlib_path_: string: relative path
+# Outputs:
+#   string: absolute path
+shlib_relToAbsPath()
+{
+  shlib_path_=$1
+
+  # prepend current directory to relative paths
+  echo "${shlib_path_}" |grep '^/' >/dev/null 2>&1 \
+      || shlib_path_="`pwd`/${shlib_path_}"
+
+  # clean up the path. if all seds supported true regular expressions, then
+  # this is what it would be:
+  shlib_old_=${shlib_path_}
+  while true; do
+    shlib_new_=`echo "${shlib_old_}" |sed 's/[^/]*\/\.\.\/*//g;s/\/\.\//\//'`
+    [ "${shlib_old_}" = "${shlib_new_}" ] && break
+    shlib_old_=${shlib_new_}
+  done
+  echo "${shlib_new_}"
+
+  unset shlib_path_ shlib_old_ shlib_new_
+}
diff --git a/lib/shunit2 b/lib/shunit2
new file mode 100644
index 0000000..590a5a8
--- /dev/null
+++ b/lib/shunit2
@@ -0,0 +1,1048 @@
+#! /bin/sh
+# $Id: shunit2 322 2011-04-24 00:09:45Z kate.ward@forestent.com $
+# vim:et:ft=sh:sts=2:sw=2
+#
+# Copyright 2008 Kate Ward. All Rights Reserved.
+# Released under the LGPL (GNU Lesser General Public License)
+#
+# shUnit2 -- Unit testing framework for Unix shell scripts.
+# http://code.google.com/p/shunit2/
+#
+# Author: kate.ward@forestent.com (Kate Ward)
+#
+# shUnit2 is a xUnit based unit test framework for Bourne shell scripts. It is
+# based on the popular JUnit unit testing framework for Java.
+
+# return if shunit already loaded
+[ -n "${SHUNIT_VERSION:-}" ] && exit 0
+
+SHUNIT_VERSION='2.1.6'
+
+SHUNIT_TRUE=0
+SHUNIT_FALSE=1
+SHUNIT_ERROR=2
+
+# enable strict mode by default
+SHUNIT_STRICT=${SHUNIT_STRICT:-${SHUNIT_TRUE}}
+
+_shunit_warn() { echo "shunit2:WARN $@" >&2; }
+_shunit_error() { echo "shunit2:ERROR $@" >&2; }
+_shunit_fatal() { echo "shunit2:FATAL $@" >&2; exit ${SHUNIT_ERROR}; }
+
+# specific shell checks
+if [ -n "${ZSH_VERSION:-}" ]; then
+  setopt |grep "^shwordsplit$" >/dev/null
+  if [ $? -ne ${SHUNIT_TRUE} ]; then
+    _shunit_fatal 'zsh shwordsplit option is required for proper operation'
+  fi
+  if [ -z "${SHUNIT_PARENT:-}" ]; then
+    _shunit_fatal "zsh does not pass \$0 through properly. please declare \
+\"SHUNIT_PARENT=\$0\" before calling shUnit2"
+  fi
+fi
+
+#
+# constants
+#
+
+__SHUNIT_ASSERT_MSG_PREFIX='ASSERT:'
+__SHUNIT_MODE_SOURCED='sourced'
+__SHUNIT_MODE_STANDALONE='standalone'
+__SHUNIT_PARENT=${SHUNIT_PARENT:-$0}
+
+# set the constants readonly
+shunit_constants_=`set |grep '^__SHUNIT_' |cut -d= -f1`
+echo "${shunit_constants_}" |grep '^Binary file' >/dev/null && \
+    shunit_constants_=`set |grep -a '^__SHUNIT_' |cut -d= -f1`
+for shunit_constant_ in ${shunit_constants_}; do
+  shunit_ro_opts_=''
+  case ${ZSH_VERSION:-} in
+    '') ;;  # this isn't zsh
+    [123].*) ;;  # early versions (1.x, 2.x, 3.x)
+    *) shunit_ro_opts_='-g' ;;  # all later versions. declare readonly globally
+  esac
+  readonly ${shunit_ro_opts_} ${shunit_constant_}
+done
+unset shunit_constant_ shunit_constants_ shunit_ro_opts_
+
+# variables
+__shunit_lineno=''  # line number of executed test
+__shunit_mode=${__SHUNIT_MODE_SOURCED}  # operating mode
+__shunit_reportGenerated=${SHUNIT_FALSE}  # is report generated
+__shunit_script=''  # filename of unittest script (standalone mode)
+__shunit_skip=${SHUNIT_FALSE}  # is skipping enabled
+__shunit_suite=''  # suite of tests to execute
+
+# counts of tests
+__shunit_testSuccess=${SHUNIT_TRUE}
+__shunit_testsTotal=0
+__shunit_testsPassed=0
+__shunit_testsFailed=0
+
+# counts of asserts
+__shunit_assertsTotal=0
+__shunit_assertsPassed=0
+__shunit_assertsFailed=0
+__shunit_assertsSkipped=0
+
+# macros
+_SHUNIT_LINENO_='eval __shunit_lineno=""; if [ "${1:-}" = "--lineno" ]; then [ -n "$2" ] && __shunit_lineno="[$2] "; shift 2; fi'
+
+#-----------------------------------------------------------------------------
+# assert functions
+#
+
+# Assert that two values are equal to one another.
+#
+# Args:
+#   message: string: failure message [optional]
+#   expected: string: expected value
+#   actual: string: actual value
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+assertEquals()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -lt 2 -o $# -gt 3 ]; then
+    _shunit_error "assertEquals() requires two or three arguments; $# given"
+    _shunit_error "1: ${1:+$1} 2: ${2:+$2} 3: ${3:+$3}"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 3 ]; then
+    shunit_message_="${shunit_message_}$1"
+    shift
+  fi
+  shunit_expected_=$1
+  shunit_actual_=$2
+
+  shunit_return=${SHUNIT_TRUE}
+  if [ "${shunit_expected_}" = "${shunit_actual_}" ]; then
+    _shunit_assertPass
+  else
+    failNotEquals "${shunit_message_}" "${shunit_expected_}" "${shunit_actual_}"
+    shunit_return=${SHUNIT_FALSE}
+  fi
+
+  unset shunit_message_ shunit_expected_ shunit_actual_
+  return ${shunit_return}
+}
+_ASSERT_EQUALS_='eval assertEquals --lineno "${LINENO:-}"'
+
+# Assert that two values are not equal to one another.
+#
+# Args:
+#   message: string: failure message [optional]
+#   expected: string: expected value
+#   actual: string: actual value
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+assertNotEquals()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -lt 2 -o $# -gt 3 ]; then
+    _shunit_error "assertNotEquals() requires two or three arguments; $# given"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 3 ]; then
+    shunit_message_="${shunit_message_}$1"
+    shift
+  fi
+  shunit_expected_=$1
+  shunit_actual_=$2
+
+  shunit_return=${SHUNIT_TRUE}
+  if [ "${shunit_expected_}" != "${shunit_actual_}" ]; then
+    _shunit_assertPass
+  else
+    failSame "${shunit_message_}" "$@"
+    shunit_return=${SHUNIT_FALSE}
+  fi
+
+  unset shunit_message_ shunit_expected_ shunit_actual_
+  return ${shunit_return}
+}
+_ASSERT_NOT_EQUALS_='eval assertNotEquals --lineno "${LINENO:-}"'
+
+# Assert that a value is null (i.e. an empty string)
+#
+# Args:
+#   message: string: failure message [optional]
+#   actual: string: actual value
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+assertNull()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -lt 1 -o $# -gt 2 ]; then
+    _shunit_error "assertNull() requires one or two arguments; $# given"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 2 ]; then
+    shunit_message_="${shunit_message_}$1"
+    shift
+  fi
+  assertTrue "${shunit_message_}" "[ -z '$1' ]"
+  shunit_return=$?
+
+  unset shunit_message_
+  return ${shunit_return}
+}
+_ASSERT_NULL_='eval assertNull --lineno "${LINENO:-}"'
+
+# Assert that a value is not null (i.e. a non-empty string)
+#
+# Args:
+#   message: string: failure message [optional]
+#   actual: string: actual value
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+assertNotNull()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -gt 2 ]; then  # allowing 0 arguments as $1 might actually be null
+    _shunit_error "assertNotNull() requires one or two arguments; $# given"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 2 ]; then
+    shunit_message_="${shunit_message_}$1"
+    shift
+  fi
+  shunit_actual_=`_shunit_escapeCharactersInString "${1:-}"`
+  test -n "${shunit_actual_}"
+  assertTrue "${shunit_message_}" $?
+  shunit_return=$?
+
+  unset shunit_actual_ shunit_message_
+  return ${shunit_return}
+}
+_ASSERT_NOT_NULL_='eval assertNotNull --lineno "${LINENO:-}"'
+
+# Assert that two values are the same (i.e. equal to one another).
+#
+# Args:
+#   message: string: failure message [optional]
+#   expected: string: expected value
+#   actual: string: actual value
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+assertSame()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -lt 2 -o $# -gt 3 ]; then
+    _shunit_error "assertSame() requires two or three arguments; $# given"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 3 ]; then
+    shunit_message_="${shunit_message_}$1"
+    shift
+  fi
+  assertEquals "${shunit_message_}" "$1" "$2"
+  shunit_return=$?
+
+  unset shunit_message_
+  return ${shunit_return}
+}
+_ASSERT_SAME_='eval assertSame --lineno "${LINENO:-}"'
+
+# Assert that two values are not the same (i.e. not equal to one another).
+#
+# Args:
+#   message: string: failure message [optional]
+#   expected: string: expected value
+#   actual: string: actual value
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+assertNotSame()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -lt 2 -o $# -gt 3 ]; then
+    _shunit_error "assertNotSame() requires two or three arguments; $# given"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 3 ]; then
+    shunit_message_="${shunit_message_:-}$1"
+    shift
+  fi
+  assertNotEquals "${shunit_message_}" "$1" "$2"
+  shunit_return=$?
+
+  unset shunit_message_
+  return ${shunit_return}
+}
+_ASSERT_NOT_SAME_='eval assertNotSame --lineno "${LINENO:-}"'
+
+# Assert that a value or shell test condition is true.
+#
+# In shell, a value of 0 is true and a non-zero value is false. Any integer
+# value passed can thereby be tested.
+#
+# Shell supports much more complicated tests though, and a means to support
+# them was needed. As such, this function tests that conditions are true or
+# false through evaluation rather than just looking for a true or false.
+#
+# The following test will succeed:
+#   assertTrue 0
+#   assertTrue "[ 34 -gt 23 ]"
+# The folloing test will fail with a message:
+#   assertTrue 123
+#   assertTrue "test failed" "[ -r '/non/existant/file' ]"
+#
+# Args:
+#   message: string: failure message [optional]
+#   condition: string: integer value or shell conditional statement
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+assertTrue()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -gt 2 ]; then
+    _shunit_error "assertTrue() takes one two arguments; $# given"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 2 ]; then
+    shunit_message_="${shunit_message_}$1"
+    shift
+  fi
+  shunit_condition_=$1
+
+  # see if condition is an integer, i.e. a return value
+  shunit_match_=`expr "${shunit_condition_}" : '\([0-9]*\)'`
+  shunit_return=${SHUNIT_TRUE}
+  if [ -z "${shunit_condition_}" ]; then
+    # null condition
+    shunit_return=${SHUNIT_FALSE}
+  elif [ -n "${shunit_match_}" -a "${shunit_condition_}" = "${shunit_match_}" ]
+  then
+    # possible return value. treating 0 as true, and non-zero as false.
+    [ ${shunit_condition_} -ne 0 ] && shunit_return=${SHUNIT_FALSE}
+  else
+    # (hopefully) a condition
+    ( eval ${shunit_condition_} ) >/dev/null 2>&1
+    [ $? -ne 0 ] && shunit_return=${SHUNIT_FALSE}
+  fi
+
+  # record the test
+  if [ ${shunit_return} -eq ${SHUNIT_TRUE} ]; then
+    _shunit_assertPass
+  else
+    _shunit_assertFail "${shunit_message_}"
+  fi
+
+  unset shunit_message_ shunit_condition_ shunit_match_
+  return ${shunit_return}
+}
+_ASSERT_TRUE_='eval assertTrue --lineno "${LINENO:-}"'
+
+# Assert that a value or shell test condition is false.
+#
+# In shell, a value of 0 is true and a non-zero value is false. Any integer
+# value passed can thereby be tested.
+#
+# Shell supports much more complicated tests though, and a means to support
+# them was needed. As such, this function tests that conditions are true or
+# false through evaluation rather than just looking for a true or false.
+#
+# The following test will succeed:
+#   assertFalse 1
+#   assertFalse "[ 'apples' = 'oranges' ]"
+# The folloing test will fail with a message:
+#   assertFalse 0
+#   assertFalse "test failed" "[ 1 -eq 1 -a 2 -eq 2 ]"
+#
+# Args:
+#   message: string: failure message [optional]
+#   condition: string: integer value or shell conditional statement
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+assertFalse()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -lt 1 -o $# -gt 2 ]; then
+    _shunit_error "assertFalse() quires one or two arguments; $# given"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 2 ]; then
+    shunit_message_="${shunit_message_}$1"
+    shift
+  fi
+  shunit_condition_=$1
+
+  # see if condition is an integer, i.e. a return value
+  shunit_match_=`expr "${shunit_condition_}" : '\([0-9]*\)'`
+  shunit_return=${SHUNIT_TRUE}
+  if [ -z "${shunit_condition_}" ]; then
+    # null condition
+    shunit_return=${SHUNIT_FALSE}
+  elif [ -n "${shunit_match_}" -a "${shunit_condition_}" = "${shunit_match_}" ]
+  then
+    # possible return value. treating 0 as true, and non-zero as false.
+    [ ${shunit_condition_} -eq 0 ] && shunit_return=${SHUNIT_FALSE}
+  else
+    # (hopefully) a condition
+    ( eval ${shunit_condition_} ) >/dev/null 2>&1
+    [ $? -eq 0 ] && shunit_return=${SHUNIT_FALSE}
+  fi
+
+  # record the test
+  if [ ${shunit_return} -eq ${SHUNIT_TRUE} ]; then
+    _shunit_assertPass
+  else
+    _shunit_assertFail "${shunit_message_}"
+  fi
+
+  unset shunit_message_ shunit_condition_ shunit_match_
+  return ${shunit_return}
+}
+_ASSERT_FALSE_='eval assertFalse --lineno "${LINENO:-}"'
+
+#-----------------------------------------------------------------------------
+# failure functions
+#
+
+# Records a test failure.
+#
+# Args:
+#   message: string: failure message [optional]
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+fail()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -gt 1 ]; then
+    _shunit_error "fail() requires zero or one arguments; $# given"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 1 ]; then
+    shunit_message_="${shunit_message_}$1"
+    shift
+  fi
+
+  _shunit_assertFail "${shunit_message_}"
+
+  unset shunit_message_
+  return ${SHUNIT_FALSE}
+}
+_FAIL_='eval fail --lineno "${LINENO:-}"'
+
+# Records a test failure, stating two values were not equal.
+#
+# Args:
+#   message: string: failure message [optional]
+#   expected: string: expected value
+#   actual: string: actual value
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+failNotEquals()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -lt 2 -o $# -gt 3 ]; then
+    _shunit_error "failNotEquals() requires one or two arguments; $# given"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 3 ]; then
+    shunit_message_="${shunit_message_}$1"
+    shift
+  fi
+  shunit_expected_=$1
+  shunit_actual_=$2
+
+  _shunit_assertFail "${shunit_message_:+${shunit_message_} }expected:<${shunit_expected_}> but was:<${shunit_actual_}>"
+
+  unset shunit_message_ shunit_expected_ shunit_actual_
+  return ${SHUNIT_FALSE}
+}
+_FAIL_NOT_EQUALS_='eval failNotEquals --lineno "${LINENO:-}"'
+
+# Records a test failure, stating two values should have been the same.
+#
+# Args:
+#   message: string: failure message [optional]
+#   expected: string: expected value
+#   actual: string: actual value
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+failSame()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -lt 2 -o $# -gt 3 ]; then
+    _shunit_error "failSame() requires two or three arguments; $# given"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 3 ]; then
+    shunit_message_="${shunit_message_}$1"
+    shift
+  fi
+
+  _shunit_assertFail "${shunit_message_:+${shunit_message_} }expected not same"
+
+  unset shunit_message_
+  return ${SHUNIT_FALSE}
+}
+_FAIL_SAME_='eval failSame --lineno "${LINENO:-}"'
+
+# Records a test failure, stating two values were not equal.
+#
+# This is functionally equivalent to calling failNotEquals().
+#
+# Args:
+#   message: string: failure message [optional]
+#   expected: string: expected value
+#   actual: string: actual value
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+failNotSame()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -lt 2 -o $# -gt 3 ]; then
+    _shunit_error "failNotEquals() requires one or two arguments; $# given"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 3 ]; then
+    shunit_message_="${shunit_message_}$1"
+    shift
+  fi
+  failNotEquals "${shunit_message_}" "$1" "$2"
+  shunit_return=$?
+
+  unset shunit_message_
+  return ${shunit_return}
+}
+_FAIL_NOT_SAME_='eval failNotSame --lineno "${LINENO:-}"'
+
+#-----------------------------------------------------------------------------
+# skipping functions
+#
+
+# Force remaining assert and fail functions to be "skipped".
+#
+# This function forces the remaining assert and fail functions to be "skipped",
+# i.e. they will have no effect. Each function skipped will be recorded so that
+# the total of asserts and fails will not be altered.
+#
+# Args:
+#   None
+startSkipping()
+{
+  __shunit_skip=${SHUNIT_TRUE}
+}
+
+# Resume the normal recording behavior of assert and fail calls.
+#
+# Args:
+#   None
+endSkipping()
+{
+  __shunit_skip=${SHUNIT_FALSE}
+}
+
+# Returns the state of assert and fail call skipping.
+#
+# Args:
+#   None
+# Returns:
+#   boolean: (TRUE/FALSE constant)
+isSkipping()
+{
+  return ${__shunit_skip}
+}
+
+#-----------------------------------------------------------------------------
+# suite functions
+#
+
+# Stub. This function should contains all unit test calls to be made.
+#
+# DEPRECATED (as of 2.1.0)
+#
+# This function can be optionally overridden by the user in their test suite.
+#
+# If this function exists, it will be called when shunit2 is sourced. If it
+# does not exist, shunit2 will search the parent script for all functions
+# beginning with the word 'test', and they will be added dynamically to the
+# test suite.
+#
+# This function should be overridden by the user in their unit test suite.
+# Note: see _shunit_mktempFunc() for actual implementation
+#
+# Args:
+#   None
+#suite() { :; }  # DO NOT UNCOMMENT THIS FUNCTION
+
+# Adds a function name to the list of tests schedule for execution.
+#
+# This function should only be called from within the suite() function.
+#
+# Args:
+#   function: string: name of a function to add to current unit test suite
+suite_addTest()
+{
+  shunit_func_=${1:-}
+
+  __shunit_suite="${__shunit_suite:+${__shunit_suite} }${shunit_func_}"
+  __shunit_testsTotal=`expr ${__shunit_testsTotal} + 1`
+
+  unset shunit_func_
+}
+
+# Stub. This function will be called once before any tests are run.
+#
+# Common one-time environment preparation tasks shared by all tests can be
+# defined here.
+#
+# This function should be overridden by the user in their unit test suite.
+# Note: see _shunit_mktempFunc() for actual implementation
+#
+# Args:
+#   None
+#oneTimeSetUp() { :; }  # DO NOT UNCOMMENT THIS FUNCTION
+
+# Stub. This function will be called once after all tests are finished.
+#
+# Common one-time environment cleanup tasks shared by all tests can be defined
+# here.
+#
+# This function should be overridden by the user in their unit test suite.
+# Note: see _shunit_mktempFunc() for actual implementation
+#
+# Args:
+#   None
+#oneTimeTearDown() { :; }  # DO NOT UNCOMMENT THIS FUNCTION
+
+# Stub. This function will be called before each test is run.
+#
+# Common environment preparation tasks shared by all tests can be defined here.
+#
+# This function should be overridden by the user in their unit test suite.
+# Note: see _shunit_mktempFunc() for actual implementation
+#
+# Args:
+#   None
+#setUp() { :; }
+
+# Note: see _shunit_mktempFunc() for actual implementation
+# Stub. This function will be called after each test is run.
+#
+# Common environment cleanup tasks shared by all tests can be defined here.
+#
+# This function should be overridden by the user in their unit test suite.
+# Note: see _shunit_mktempFunc() for actual implementation
+#
+# Args:
+#   None
+#tearDown() { :; }  # DO NOT UNCOMMENT THIS FUNCTION
+
+#------------------------------------------------------------------------------
+# internal shUnit2 functions
+#
+
+# Create a temporary directory to store various run-time files in.
+#
+# This function is a cross-platform temporary directory creation tool. Not all
+# OSes have the mktemp function, so one is included here.
+#
+# Args:
+#   None
+# Outputs:
+#   string: the temporary directory that was created
+_shunit_mktempDir()
+{
+  # try the standard mktemp function
+  ( exec mktemp -dqt shunit.XXXXXX 2>/dev/null ) && return
+
+  # the standard mktemp didn't work.  doing our own.
+  if [ -r '/dev/urandom' -a -x '/usr/bin/od' ]; then
+    _shunit_random_=`/usr/bin/od -vAn -N4 -tx4 </dev/urandom \
+        |sed 's/^[^0-9a-f]*//'`
+  elif [ -n "${RANDOM:-}" ]; then
+    # $RANDOM works
+    _shunit_random_=${RANDOM}${RANDOM}${RANDOM}$$
+  else
+    # $RANDOM doesn't work
+    _shunit_date_=`date '+%Y%m%d%H%M%S'`
+    _shunit_random_=`expr ${_shunit_date_} / $$`
+  fi
+
+  _shunit_tmpDir_="${TMPDIR:-/tmp}/shunit.${_shunit_random_}"
+  ( umask 077 && mkdir "${_shunit_tmpDir_}" ) || \
+      _shunit_fatal 'could not create temporary directory! exiting'
+
+  echo ${_shunit_tmpDir_}
+  unset _shunit_date_ _shunit_random_ _shunit_tmpDir_
+}
+
+# This function is here to work around issues in Cygwin.
+#
+# Args:
+#   None
+_shunit_mktempFunc()
+{
+  for _shunit_func_ in oneTimeSetUp oneTimeTearDown setUp tearDown suite noexec
+  do
+    _shunit_file_="${__shunit_tmpDir}/${_shunit_func_}"
+    cat <<EOF >"${_shunit_file_}"
+#! /bin/sh
+exit ${SHUNIT_TRUE}
+EOF
+    chmod +x "${_shunit_file_}"
+  done
+
+  unset _shunit_file_
+}
+
+# Final cleanup function to leave things as we found them.
+#
+# Besides removing the temporary directory, this function is in charge of the
+# final exit code of the unit test. The exit code is based on how the script
+# was ended (e.g. normal exit, or via Ctrl-C).
+#
+# Args:
+#   name: string: name of the trap called (specified when trap defined)
+_shunit_cleanup()
+{
+  _shunit_name_=$1
+
+  case ${_shunit_name_} in
+    EXIT) _shunit_signal_=0 ;;
+    INT) _shunit_signal_=2 ;;
+    TERM) _shunit_signal_=15 ;;
+    *)
+      _shunit_warn "unrecognized trap value (${_shunit_name_})"
+      _shunit_signal_=0
+      ;;
+  esac
+
+  # do our work
+  rm -fr "${__shunit_tmpDir}"
+
+  # exit for all non-EXIT signals
+  if [ ${_shunit_name_} != 'EXIT' ]; then
+    _shunit_warn "trapped and now handling the (${_shunit_name_}) signal"
+    # disable EXIT trap
+    trap 0
+    # add 128 to signal and exit
+    exit `expr ${_shunit_signal_} + 128`
+  elif [ ${__shunit_reportGenerated} -eq ${SHUNIT_FALSE} ] ; then
+    _shunit_assertFail 'Unknown failure encountered running a test'
+    _shunit_generateReport
+    exit ${SHUNIT_ERROR}
+  fi
+
+  unset _shunit_name_ _shunit_signal_
+}
+
+# The actual running of the tests happens here.
+#
+# Args:
+#   None
+_shunit_execSuite()
+{
+  for _shunit_test_ in ${__shunit_suite}; do
+    __shunit_testSuccess=${SHUNIT_TRUE}
+
+    # disable skipping
+    endSkipping
+
+    # execute the per-test setup function
+    setUp
+
+    # execute the test
+    echo "${_shunit_test_}"
+    eval ${_shunit_test_}
+
+    # execute the per-test tear-down function
+    tearDown
+
+    # update stats
+    if [ ${__shunit_testSuccess} -eq ${SHUNIT_TRUE} ]; then
+      __shunit_testsPassed=`expr ${__shunit_testsPassed} + 1`
+    else
+      __shunit_testsFailed=`expr ${__shunit_testsFailed} + 1`
+    fi
+  done
+
+  unset _shunit_test_
+}
+
+# Generates the user friendly report with appropriate OK/FAILED message.
+#
+# Args:
+#   None
+# Output:
+#   string: the report of successful and failed tests, as well as totals.
+_shunit_generateReport()
+{
+  _shunit_ok_=${SHUNIT_TRUE}
+
+  # if no exit code was provided one, determine an appropriate one
+  [ ${__shunit_testsFailed} -gt 0 \
+      -o ${__shunit_testSuccess} -eq ${SHUNIT_FALSE} ] \
+          && _shunit_ok_=${SHUNIT_FALSE}
+
+  echo
+  if [ ${__shunit_testsTotal} -eq 1 ]; then
+    echo "Ran ${__shunit_testsTotal} test."
+  else
+    echo "Ran ${__shunit_testsTotal} tests."
+  fi
+
+  _shunit_failures_=''
+  _shunit_skipped_=''
+  [ ${__shunit_assertsFailed} -gt 0 ] \
+      && _shunit_failures_="failures=${__shunit_assertsFailed}"
+  [ ${__shunit_assertsSkipped} -gt 0 ] \
+      && _shunit_skipped_="skipped=${__shunit_assertsSkipped}"
+
+  if [ ${_shunit_ok_} -eq ${SHUNIT_TRUE} ]; then
+    _shunit_msg_='OK'
+    [ -n "${_shunit_skipped_}" ] \
+        && _shunit_msg_="${_shunit_msg_} (${_shunit_skipped_})"
+  else
+    _shunit_msg_="FAILED (${_shunit_failures_}"
+    [ -n "${_shunit_skipped_}" ] \
+        && _shunit_msg_="${_shunit_msg_},${_shunit_skipped_}"
+    _shunit_msg_="${_shunit_msg_})"
+  fi
+
+  echo
+  echo ${_shunit_msg_}
+  __shunit_reportGenerated=${SHUNIT_TRUE}
+
+  unset _shunit_failures_ _shunit_msg_ _shunit_ok_ _shunit_skipped_
+}
+
+# Test for whether a function should be skipped.
+#
+# Args:
+#   None
+# Returns:
+#   boolean: whether the test should be skipped (TRUE/FALSE constant)
+_shunit_shouldSkip()
+{
+  [ ${__shunit_skip} -eq ${SHUNIT_FALSE} ] && return ${SHUNIT_FALSE}
+  _shunit_assertSkip
+}
+
+# Records a successful test.
+#
+# Args:
+#   None
+_shunit_assertPass()
+{
+  __shunit_assertsPassed=`expr ${__shunit_assertsPassed} + 1`
+  __shunit_assertsTotal=`expr ${__shunit_assertsTotal} + 1`
+}
+
+# Records a test failure.
+#
+# Args:
+#   message: string: failure message to provide user
+_shunit_assertFail()
+{
+  _shunit_msg_=$1
+
+  __shunit_testSuccess=${SHUNIT_FALSE}
+  __shunit_assertsFailed=`expr ${__shunit_assertsFailed} + 1`
+  __shunit_assertsTotal=`expr ${__shunit_assertsTotal} + 1`
+  echo "${__SHUNIT_ASSERT_MSG_PREFIX}${_shunit_msg_}"
+
+  unset _shunit_msg_
+}
+
+# Records a skipped test.
+#
+# Args:
+#   None
+_shunit_assertSkip()
+{
+  __shunit_assertsSkipped=`expr ${__shunit_assertsSkipped} + 1`
+  __shunit_assertsTotal=`expr ${__shunit_assertsTotal} + 1`
+}
+
+# Prepare a script filename for sourcing.
+#
+# Args:
+#   script: string: path to a script to source
+# Returns:
+#   string: filename prefixed with ./ (if necessary)
+_shunit_prepForSourcing()
+{
+  _shunit_script_=$1
+  case "${_shunit_script_}" in
+    /*|./*) echo "${_shunit_script_}" ;;
+    *) echo "./${_shunit_script_}" ;;
+  esac
+  unset _shunit_script_
+}
+
+# Escape a character in a string.
+#
+# Args:
+#   c: string: unescaped character
+#   s: string: to escape character in
+# Returns:
+#   string: with escaped character(s)
+_shunit_escapeCharInStr()
+{
+  [ -n "$2" ] || return  # no point in doing work on an empty string
+
+  # Note: using shorter variable names to prevent conflicts with
+  # _shunit_escapeCharactersInString().
+  _shunit_c_=$1
+  _shunit_s_=$2
+
+
+  # escape the character
+  echo ''${_shunit_s_}'' |sed 's/\'${_shunit_c_}'/\\\'${_shunit_c_}'/g'
+
+  unset _shunit_c_ _shunit_s_
+}
+
+# Escape a character in a string.
+#
+# Args:
+#   str: string: to escape characters in
+# Returns:
+#   string: with escaped character(s)
+_shunit_escapeCharactersInString()
+{
+  [ -n "$1" ] || return  # no point in doing work on an empty string
+
+  _shunit_str_=$1
+
+  # Note: using longer variable names to prevent conflicts with
+  # _shunit_escapeCharInStr().
+  for _shunit_char_ in '"' '$' "'" '`'; do
+    _shunit_str_=`_shunit_escapeCharInStr "${_shunit_char_}" "${_shunit_str_}"`
+  done
+
+  echo "${_shunit_str_}"
+  unset _shunit_char_ _shunit_str_
+}
+
+# Extract list of functions to run tests against.
+#
+# Args:
+#   script: string: name of script to extract functions from
+# Returns:
+#   string: of function names
+_shunit_extractTestFunctions()
+{
+  _shunit_script_=$1
+
+  # extract the lines with test function names, strip of anything besides the
+  # function name, and output everything on a single line.
+  _shunit_regex_='^[ 	]*(function )*test[A-Za-z0-9_]* *\(\)'
+  egrep "${_shunit_regex_}" "${_shunit_script_}" \
+  |sed 's/^[^A-Za-z0-9_]*//;s/^function //;s/\([A-Za-z0-9_]*\).*/\1/g' \
+  |xargs
+
+  unset _shunit_regex_ _shunit_script_
+}
+
+#------------------------------------------------------------------------------
+# main
+#
+
+# determine the operating mode
+if [ $# -eq 0 ]; then
+  __shunit_script=${__SHUNIT_PARENT}
+  __shunit_mode=${__SHUNIT_MODE_SOURCED}
+else
+  __shunit_script=$1
+  [ -r "${__shunit_script}" ] || \
+      _shunit_fatal "unable to read from ${__shunit_script}"
+  __shunit_mode=${__SHUNIT_MODE_STANDALONE}
+fi
+
+# create a temporary storage location
+__shunit_tmpDir=`_shunit_mktempDir`
+
+# provide a public temporary directory for unit test scripts
+# TODO(kward): document this
+SHUNIT_TMPDIR="${__shunit_tmpDir}/tmp"
+mkdir "${SHUNIT_TMPDIR}"
+
+# setup traps to clean up after ourselves
+trap '_shunit_cleanup EXIT' 0
+trap '_shunit_cleanup INT' 2
+trap '_shunit_cleanup TERM' 15
+
+# create phantom functions to work around issues with Cygwin
+_shunit_mktempFunc
+PATH="${__shunit_tmpDir}:${PATH}"
+
+# make sure phantom functions are executable. this will bite if /tmp (or the
+# current $TMPDIR) points to a path on a partition that was mounted with the
+# 'noexec' option. the noexec command was created with _shunit_mktempFunc().
+noexec 2>/dev/null || _shunit_fatal \
+    'please declare TMPDIR with path on partition with exec permission'
+
+# we must manually source the tests in standalone mode
+if [ "${__shunit_mode}" = "${__SHUNIT_MODE_STANDALONE}" ]; then
+  . "`_shunit_prepForSourcing \"${__shunit_script}\"`"
+fi
+
+# execute the oneTimeSetUp function (if it exists)
+oneTimeSetUp
+
+# execute the suite function defined in the parent test script
+# deprecated as of 2.1.0
+suite
+
+# if no suite function was defined, dynamically build a list of functions
+if [ -z "${__shunit_suite}" ]; then
+  shunit_funcs_=`_shunit_extractTestFunctions "${__shunit_script}"`
+  for shunit_func_ in ${shunit_funcs_}; do
+    suite_addTest ${shunit_func_}
+  done
+fi
+unset shunit_func_ shunit_funcs_
+
+# execute the tests
+_shunit_execSuite
+
+# execute the oneTimeTearDown function (if it exists)
+oneTimeTearDown
+
+# generate the report
+_shunit_generateReport
+
+# that's it folks
+[ ${__shunit_testsFailed} -eq 0 ]
+exit $?
diff --git a/lib/versions b/lib/versions
new file mode 100755
index 0000000..7ca55e7
--- /dev/null
+++ b/lib/versions
@@ -0,0 +1,239 @@
+#! /bin/sh
+# $Id$
+# vim:et:ft=sh:sts=2:sw=2
+#
+# Copyright 2008 Kate Ward. All Rights Reserved.
+# Released under the LGPL (GNU Lesser General Public License)
+#
+# Author: kate.ward@forestent.com (Kate Ward)
+#
+# This library provides reusable functions that determine actual names and
+# versions of installed shells and the OS. The library can also be run as a
+# script if set execuatable.
+
+ARGV0=`basename "$0"`
+LSB_RELEASE='/etc/lsb-release'
+VERSIONS_SHELLS="/bin/bash /bin/dash /bin/ksh /bin/pdksh /bin/sh /bin/zsh"
+
+TRUE=0
+FALSE=1
+ERROR=2
+
+UNAME_R=`uname -r`
+UNAME_S=`uname -s`
+
+__versions_haveStrings=${ERROR}
+
+#------------------------------------------------------------------------------
+# functions
+#
+
+versions_osName()
+{
+  os_name_='unrecognized'
+  os_system_=${UNAME_S}
+  case ${os_system_} in
+    CYGWIN_NT-*) os_name_='Cygwin' ;;
+    Darwin) os_name_='Mac OS X' ;;
+    FreeBSD) os_name_='FreeBSD' ;;
+    Linux) os_name_='Linux' ;;
+    SunOS)
+      if grep 'OpenSolaris' /etc/release >/dev/null; then
+        os_name_='OpenSolaris'
+      else
+        os_name_='Solaris'
+      fi
+      ;;
+  esac
+
+  echo ${os_name_}
+  unset os_name_ os_system_
+}
+
+versions_osVersion()
+{
+  os_version_='unrecognized'
+  os_system_=${UNAME_S}
+  os_release_=${UNAME_R}
+  case ${os_system_} in
+    CYGWIN_NT-*)
+      os_version_=`expr "${os_release_}" : '\([0-9]*\.[0-9]\.[0-9]*\).*'`
+      ;;
+    Darwin)
+      major_='10'
+      sub_=`echo ${os_release_} |sed 's/^[0-9]*\.\([0-9]*\)\.[0-9]*$/\1/'`
+      case ${os_release_} in
+        8.*) minor_='4' ;;
+        9.*) minor_='5' ;;
+        10.*) minor_='6' ;;
+        11.*) minor_='7' ;;
+        12.*) minor_='8' ;;
+        *) minor_='X'; sub_='X' ;;
+      esac
+      os_version_="${major_}.${minor_}.${sub_}"
+      ;;
+    FreeBSD)
+      os_version_=`expr "${os_release_}" : '\([0-9]*\.[0-9]*\)-.*'`
+      ;;
+    Linux)
+      if [ -r "${LSB_RELEASE}" ]; then
+        if grep -q 'DISTRIB_ID=Ubuntu' "${LSB_RELEASE}"; then
+          os_version_=`cat "${LSB_RELEASE}" \
+            |awk -F= '$1~/DISTRIB_DESCRIPTION/{print $2}' \
+            |sed 's/"//g;s/ /-/g'`
+        fi
+      elif [ -r '/etc/redhat-release' ]; then
+        os_version_=`cat /etc/redhat-release`
+      fi
+      ;;
+    SunOS)
+      if grep 'OpenSolaris' /etc/release >/dev/null; then
+        os_version_=`grep 'OpenSolaris' /etc/release |awk '{print $2"("$3")"}'`
+      else
+        major_=`echo ${os_release_} |sed 's/[0-9]*\.\([0-9]*\)/\1/'`
+        minor_=`grep Solaris /etc/release |sed 's/[^u]*\(u[0-9]*\).*/\1/'`
+        os_version_="${major_}${minor_}"
+      fi
+      ;;
+  esac
+
+  echo ${os_version_}
+  unset os_name_ os_release_ os_version_ major_ minor_ sub_
+}
+
+versions_shellVersion()
+{
+  shell_=$1
+
+  if [ ! -x "${shell_}" ]; then
+    echo 'not installed'
+    return
+  fi
+
+  version_=''
+  case ${shell_} in
+    */sh)
+      # TODO(kward): fix this
+      ## this could be one of any number of shells. try until one fits.
+      #version_=`versions_shell_bash ${shell_}`
+      ## dash cannot be self determined yet
+      #[ -z "${version_}" ] && version_=`versions_shell_ksh ${shell_}`
+      ## pdksh is covered in versions_shell_ksh()
+      #[ -z "${version_}" ] && version_=`versions_shell_zsh ${shell_}`
+      ;;
+    */bash) version_=`versions_shell_bash ${shell_}` ;;
+    */dash)
+      # simply assuming Ubuntu Linux until somebody comes up with a better
+      # test. the following test will return an empty string if dash is not
+      # installed.
+      version_=`versions_shell_dash`
+      ;;
+    */ksh) version_=`versions_shell_ksh ${shell_}` ;;
+    */pdksh) version_=`versions_shell_pdksh ${shell_}` ;;
+    */zsh) version_=`versions_shell_zsh ${shell_}` ;;
+    *) version_='invalid'
+  esac
+
+  echo ${version_:-unknown}
+  unset shell_ version_
+}
+
+versions_shell_bash()
+{
+  $1 --version 2>&1 |grep 'GNU bash' |sed 's/.*version \([^ ]*\).*/\1/'
+}
+
+versions_shell_dash()
+{
+  eval dpkg >/dev/null 2>&1
+  [ $? -eq 127 ] && return  # return if dpkg not found
+
+  dpkg -l |grep ' dash ' |awk '{print $3}'
+}
+
+versions_shell_ksh()
+{
+  versions_shell_=$1
+
+  # try a few different ways to figure out the version
+  versions_version_=`${versions_shell_} --version : 2>&1`
+  if [ $? -eq 0 ]; then
+    versions_version_=`echo "${versions_version_}" \
+      |sed 's/.*\([0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]\).*/\1/'`
+  else
+    versions_version_=''
+  fi
+
+  if [ -z "${versions_version_}" ]; then
+    _versions_have_strings
+    versions_version_=`strings ${versions_shell_} 2>&1 \
+      |grep Version \
+      |sed 's/^.*Version \(.*\)$/\1/;s/ s+ \$$//;s/ /-/g'`
+  fi
+
+  if [ -z "${versions_version_}" ]; then
+    versions_version_=`versions_shell_pdksh ${versions_shell_}`
+  fi
+
+  echo ${versions_version_}
+  unset versions_shell_ versions_version_
+}
+
+versions_shell_pdksh()
+{
+  _versions_have_strings
+  strings $1 2>&1 \
+  |grep 'PD KSH' \
+  |sed -e 's/.*PD KSH \(.*\)/\1/;s/ /-/g'
+}
+
+versions_shell_zsh()
+{
+  versions_shell_=$1
+
+  # try a few different ways to figure out the version
+  versions_version_=`echo 'echo ${ZSH_VERSION}' |${versions_shell_}`
+
+  if [ -z "${versions_version_}" ]; then
+    versions_version_=`${versions_shell_} --version 2>&1 |awk '{print $2}'`
+  fi
+
+  echo ${versions_version_}
+  unset versions_shell_ versions_version_
+}
+
+# Determine if the 'strings' binary installed.
+_versions_have_strings()
+{
+  [ ${__versions_haveStrings} -ne ${ERROR} ] && return
+  eval strings /dev/null >/dev/null 2>&1
+  if [ $? -eq 0 ]; then
+    __versions_haveStrings=${TRUE}
+  else
+    echo 'WARN: strings not installed. try installing binutils?' >&2
+    __versions_haveStrings=${FALSE}
+  fi
+}
+
+#------------------------------------------------------------------------------
+# main
+#
+
+versions_main()
+{
+  # treat unset variables as an error
+  set -u
+
+  os_name=`versions_osName`
+  os_version=`versions_osVersion`
+  echo "os: ${os_name} version: ${os_version}"
+
+  for shell in ${VERSIONS_SHELLS}; do
+    shell_version=`versions_shellVersion ${shell}`
+    echo "shell: ${shell} version: ${shell_version}"
+  done
+}
+
+if [ "${ARGV0}" = 'versions' ]; then
+  versions_main "$@"
+fi