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|
#!/usr/bin/env bash
source $(dirname ${BASH_SOURCE[0]})/nix-utils.sh
usage() {
cat <<EOS >&2
$(help_synopsis "${BASH_SOURCE[0]}" "[-h] [--shell]")
--shell If a command is not available, try to execute it in this shell
-h Show this help and exit
All nixos-script subcommands and their respective arguments are available.
In addition to the normal commands, these commands are available:
list | Lists all available commands
$(help_end "repl")
EOS
}
Color_Off='\e[0m'
Red='\e[0;31m'
Green='\e[32m'
__SHELL=0
for arg
do
case $arg in
--shell)
__SHELL=1
dbg "__SHELL = $__SHELL"
;;
"-h")
usage
exit 0
;;
*)
;;
esac
done
run() {
dbg $*; $*
}
__exists() {
dbg "Exists '$1'? ..."
which $1 >/dev/null 2>/dev/null
}
prompt() {
echo -en "${Green}nix-script repl >${Color_Off} "
}
__run_if_exists() {
[[ $(__exists $1) ]] && run $* || false
}
__list() {
dbg "Listing commands"
caller_util_list_subcommands_for "nix-script"
}
__verbosity() {
case $1 in
on)
export VERBOSE=1
dbg "VERBOSE = $VERBOSE"
stdout "Verbosity is now ON"
;;
off)
export VERBOSE=0
dbg "VERBOSE = $VERBOSE"
stdout "Verbosity is now ON"
;;
*)
stderr "Unknown argument: $1"
stderr "Usage: verbosity [on|off]"
;;
esac
}
__debugging() {
case $1 in
on)
export DEBUG=1
dbg "DEBUG = $DEBUG"
stdout "Debugging is now ON"
;;
off)
export DEBUG=0
dbg "DEBUG = $DEBUG"
stdout "Debugging is now ON"
;;
*)
stderr "Unknown argument: $1"
stderr "Usage: debuggig [on|off]"
;;
esac
}
__exit() {
stdout "Ready. Bye-Bye!"
[[ -z "$1" ]] && exit 0
exit $1
}
__builtin__() {
local str=$1; shift
local cmd=$1; shift
local args=$*
[[ $COMMAND =~ $str ]] && $cmd $args && prompt
}
prompt
while read COMMAND ARGS
do
__builtin__ "help" usage $ARGS && continue
__builtin__ "exit" __exit $ARGS && continue
__builtin__ "list" __list $ARGS && continue
__builtin__ "verbosity" __verbosity $ARGS && continue
__builtin__ "debugging" __debugging $ARGS && continue
dbg "Got '$COMMAND' with args '$ARGS'"
stdout "Searching for script for '$COMMAND'"
SCRIPT=$(script_for $COMMAND)
if [[ ! -f $SCRIPT || ! -x $SCRIPT ]]
then
dbg "Not available or executable: $COMMAND"
#
# Checks whether the args include bash-specific things like || or &&, as
# these cannot be executed by nix-script repl by now, and prints a
# warning and does not allow execution of these.
#
if [[ "$ARGS" =~ ^[a-zA-Z0-9_\ ]*$ && $__SHELL -eq 1 ]]
then
dbg "Executing: '$COMMAND $ARGS'"
$COMMAND $ARGS
fi
else
stdout "Calling: '$COMMAND $ARGS'"
bash $SCRIPT $ARGS
fi
prompt
done
|
