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;;; Chickadee Game Toolkit
;;; Copyright © 2021 David Thompson <dthompson2@worcester.edu>
;;;
;;; Chickadee is free software: you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published
;;; by the Free Software Foundation, either version 3 of the License,
;;; or (at your option) any later version.
;;;
;;; Chickadee 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
;;; General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with this program. If not, see
;;; <http://www.gnu.org/licenses/>.
(define-module (chickadee cli)
#:use-module (chickadee)
#:use-module (chickadee config)
#:use-module (ice-9 format)
#:use-module (ice-9 match)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-37)
#:export (launch-chickadee
display-version-and-exit
leave
simple-args-fold
operands))
(define (display-version-and-exit)
(format #t "Chickadee ~a
Copyright (C) 2021 David Thompson and Chickadee contributors
License GPLv3+: GNU GPL version 3 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.~%"
%chickadee-version)
(exit 0))
(define (display-help-and-exit)
(format #t "Usage: chickadee SUBCOMMAND ARGS ...~%
Run SUBCOMMAND with ARGS
Valid subcommands:
* bundle
* play~%")
(exit 1))
(define (leave format-string . args)
"Display error message and exist."
(apply format (current-error-port) format-string args)
(newline)
(exit 1))
(define (simple-args-fold args options defaults)
(args-fold args options
(lambda (opt name arg result)
(leave "unrecognized option: ~A" name))
(lambda (arg result)
(alist-cons 'operand arg result))
defaults))
(define (operands opts)
(filter-map (match-lambda
(('operand . arg) arg)
(_ #f))
opts))
(define (run-chickadee-command command . args)
(define (invalid-command)
(format (current-error-port) "invalid subcommand: ~a~%~%" command)
(display-help-and-exit))
(let* ((module
(catch 'misc-error
(lambda ()
(resolve-interface `(chickadee cli ,command)))
(lambda args
(invalid-command))))
(proc-name (symbol-append 'chickadee- command))
(command-proc (false-if-exception (module-ref module proc-name))))
(if (procedure? command-proc)
(apply command-proc args)
(invalid-command))))
(define (subcommand? arg)
(not (string-prefix? "-" arg)))
(define (launch-chickadee . args)
(match args
((program (or "--verison" "-v"))
(display-version-and-exit))
((or (program) (program (or "--help" "-h")))
(display-help-and-exit))
((program (? subcommand? subcommand) . args*)
(apply run-chickadee-command (string->symbol subcommand) args*))
((program invalid-subcommand . args*)
(leave "invalid subcommand: ~A" invalid-subcommand))))
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