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|
#!/usr/bin/env bash
usage() {
cat <<EOS >&2
$(help_synopsis "${BASE_SOURCE[0]}" "[options] <command> <commandoptions>")
-l | --list-commands List all available commands
-v Be verbose
-h Show this help and exit
$(help_end)
EOS
}
LIST_COMMANDS=0
VERBOSE=0
source $(dirname ${BASH_SOURCE[0]})/nix-utils.sh
#
# Get the name of the script file for the command passed as argument
#
# Does not check whether the file exists.
#
script_for() {
echo "$(dirname ${BASH_SOURCE[0]})/nix-script-${1}.sh"
}
SHIFT_ARGS=0
#
# Increase the SHIFT_ARGS variable
#
shift_one_more() {
SHIFT_ARGS=$(( SHIFT_ARGS + 1 ))
}
#
# Shift N times the arguments, so:
#
# shift_n 5 a b c d e f
#
# will print "f"
#
shift_n() {
for n in `seq 0 $1`; do shift; done
echo $*
}
#
# List all available commands
#
all_commands() {
find $(dirname ${BASH_SOURCE[0]}) -type f -name "nix-script-*.sh"
}
#
# Parse the arguments for this script
#
for cmd
do
case $cmd in
"--list-commands" )
LIST_COMMANDS=1
shift_one_more
;;
"-l" )
LIST_COMMANDS=1
shift_one_more
;;
"-v" )
export VERBOSE=1
stdout "Verbose now"
shift_one_more
;;
"-h" )
usage
exit 1
;;
* )
if [ ! -n $(script_for $cmd) ]
then
stderr "Unknown flag / command '$cmd'"
exit 1
else
if [ -z "$COMMAND" ]
then
stdout "Found command: '$cmd'"
COMMAND=$cmd
shift_one_more
fi
break
fi
esac
done
if [ $LIST_COMMANDS -eq 1 ]
then
stdout "Listing commands"
for cmd in $(all_commands)
do
echo $(scriptname_to_command $cmd)
done
exit 0
fi
[ -z "$COMMAND" ] && stderr "No command given" && exit 1
stdout "Searching for script for '$COMMAND'"
SCRIPT=$(script_for $COMMAND)
#
# Error checking whether the script is available and executable.
#
[ ! -f $SCRIPT ] && stderr "Not available: $COMMAND -> $SCRIPT" && exit 1
[[ ! -x $SCRIPT ]] && stderr "Not executeable: $SCRIPT" && exit 1
stdout "Parsing args for '$COMMAND'"
SCRIPT_ARGS=$(shift_n $SHIFT_ARGS $*)
#
# execute the script with its arguments
#
stdout "Calling: '$SCRIPT $SCRIPT_ARGS'"
exec bash $SCRIPT $SCRIPT_ARGS
|
