You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
97 lines
3.6 KiB
97 lines
3.6 KiB
#!/bin/bash
|
|
|
|
# Copyright 2012 Johns Hopkins University (Author: Daniel Povey);
|
|
# Arnab Ghoshal, Karel Vesely
|
|
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
|
# KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
|
|
# WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
|
|
# MERCHANTABLITY OR NON-INFRINGEMENT.
|
|
# See the Apache 2 License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
|
|
# Parse command-line options.
|
|
# To be sourced by another script (as in ". parse_options.sh").
|
|
# Option format is: --option-name arg
|
|
# and shell variable "option_name" gets set to value "arg."
|
|
# The exception is --help, which takes no arguments, but prints the
|
|
# $help_message variable (if defined).
|
|
|
|
|
|
###
|
|
### The --config file options have lower priority to command line
|
|
### options, so we need to import them first...
|
|
###
|
|
|
|
# Now import all the configs specified by command-line, in left-to-right order
|
|
for ((argpos=1; argpos<$#; argpos++)); do
|
|
if [ "${!argpos}" == "--config" ]; then
|
|
argpos_plus1=$((argpos+1))
|
|
config=${!argpos_plus1}
|
|
[ ! -r $config ] && echo "$0: missing config '$config'" && exit 1
|
|
. $config # source the config file.
|
|
fi
|
|
done
|
|
|
|
|
|
###
|
|
### No we process the command line options
|
|
###
|
|
while true; do
|
|
[ -z "${1:-}" ] && break; # break if there are no arguments
|
|
case "$1" in
|
|
# If the enclosing script is called with --help option, print the help
|
|
# message and exit. Scripts should put help messages in $help_message
|
|
--help|-h) if [ -z "$help_message" ]; then echo "No help found." 1>&2;
|
|
else printf "$help_message\n" 1>&2 ; fi;
|
|
exit 0 ;;
|
|
--*=*) echo "$0: options to scripts must be of the form --name value, got '$1'"
|
|
exit 1 ;;
|
|
# If the first command-line argument begins with "--" (e.g. --foo-bar),
|
|
# then work out the variable name as $name, which will equal "foo_bar".
|
|
--*) name=`echo "$1" | sed s/^--// | sed s/-/_/g`;
|
|
# Next we test whether the variable in question is undefned-- if so it's
|
|
# an invalid option and we die. Note: $0 evaluates to the name of the
|
|
# enclosing script.
|
|
# The test [ -z ${foo_bar+xxx} ] will return true if the variable foo_bar
|
|
# is undefined. We then have to wrap this test inside "eval" because
|
|
# foo_bar is itself inside a variable ($name).
|
|
eval '[ -z "${'$name'+xxx}" ]' && echo "$0: invalid option $1" 1>&2 && exit 1;
|
|
|
|
oldval="`eval echo \\$$name`";
|
|
# Work out whether we seem to be expecting a Boolean argument.
|
|
if [ "$oldval" == "true" ] || [ "$oldval" == "false" ]; then
|
|
was_bool=true;
|
|
else
|
|
was_bool=false;
|
|
fi
|
|
|
|
# Set the variable to the right value-- the escaped quotes make it work if
|
|
# the option had spaces, like --cmd "queue.pl -sync y"
|
|
eval $name=\"$2\";
|
|
|
|
# Check that Boolean-valued arguments are really Boolean.
|
|
if $was_bool && [[ "$2" != "true" && "$2" != "false" ]]; then
|
|
echo "$0: expected \"true\" or \"false\": $1 $2" 1>&2
|
|
exit 1;
|
|
fi
|
|
shift 2;
|
|
;;
|
|
*) break;
|
|
esac
|
|
done
|
|
|
|
|
|
# Check for an empty argument to the --cmd option, which can easily occur as a
|
|
# result of scripting errors.
|
|
[ ! -z "${cmd+xxx}" ] && [ -z "$cmd" ] && echo "$0: empty argument to --cmd option" 1>&2 && exit 1;
|
|
|
|
|
|
true; # so this script returns exit code 0. |