141 lines
4.3 KiB
Scheme
141 lines
4.3 KiB
Scheme
;;; Haunt --- Static site generator for GNU Guile
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;;; Copyright © 2015 David Thompson <davet@gnu.org>
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;;;
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;;; This file is part of Haunt.
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;;;
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;;; Haunt is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or
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;;; (at your option) any later version.
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;;;
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;;; Haunt is distributed in the hope that it will be useful, but
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;;; WITnnnHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;;; General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with Haunt. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;
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;; Haunt user interface.
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;;
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;;; Code:
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(define-module (haunt ui)
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#:use-module (ice-9 format)
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#:use-module (ice-9 ftw)
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#:use-module (ice-9 match)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-26)
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#:use-module (srfi srfi-37)
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#:use-module (haunt config)
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#:use-module (haunt site)
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#:use-module (haunt utils)
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#:export (program-name
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show-version-and-exit
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simple-args-fold
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%common-options
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%default-common-options
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show-common-options-help
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leave
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string->number*
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load-config
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option?
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haunt-main))
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(define commands
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'("build" "serve"))
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(define program-name (make-parameter 'haunt))
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(define (show-haunt-help)
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(format #t "Usage: haunt COMMAND ARGS...
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Run COMMAND with ARGS.~%~%")
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(format #t "COMMAND must be one of the sub-commands listed below:~%~%")
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(format #t "~{ ~a~%~}" (sort commands string<?)))
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(define (show-haunt-usage)
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(format #t "Try `haunt --help' for more information.~%")
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(exit 1))
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(define (show-version-and-exit name)
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(format #t "~a ~a
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Copyright (C) 2015 the Haunt authors
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License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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This is free software: you are free to change and redistribute it.
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There is NO WARRANTY, to the extent permitted by law.~%"
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name %haunt-version)
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(exit 0))
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(define (leave format-string . args)
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"Display error message and exist."
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(apply format (current-error-port) format-string args)
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(newline)
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(exit 1))
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(define (string->number* str)
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"Like `string->number', but error out with an error message on failure."
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(or (string->number str)
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(leave "~a: invalid number" str)))
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(define (simple-args-fold args options default-options)
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(args-fold args options
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(lambda (opt name arg result)
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(leave "~A: unrecognized option" name))
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(lambda (arg result)
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(leave "~A: extraneuous argument" arg))
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default-options))
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(define %common-options
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(list (option '(#\c "config") #t #f
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(lambda (opt name arg result)
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(alist-cons 'config arg result)))))
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(define %default-common-options
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'((config . "haunt.scm")))
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(define (show-common-options-help)
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(display "
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-c, --config configuration file to load"))
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(define (option? str)
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(string-prefix? "-" str))
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(define* (load-config file-name)
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"Load configuration from FILE-NAME."
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(if (file-exists? file-name)
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(let ((obj (load (absolute-file-name file-name))))
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(if (site? obj)
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obj
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(leave "configuration object must be a site, got: ~a" obj)))
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(leave "configuration file not found: ~a" file-name)))
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(define (run-haunt-command command . args)
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(let* ((module
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(catch 'misc-error
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(lambda ()
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(resolve-interface `(haunt ui ,command)))
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(lambda -
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(format (current-error-port) "~a: invalid subcommand~%" command)
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(show-haunt-usage))))
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(command-main (module-ref module (symbol-append 'haunt- command))))
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(parameterize ((program-name command))
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(apply command-main args))))
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(define* (haunt-main arg0 . args)
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(match args
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(()
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(show-haunt-usage))
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((or ("-h") ("--help"))
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(show-haunt-help))
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(("--version")
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(show-version-and-exit "haunt"))
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(((? option? opt) _ ...)
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(format (current-error-port)
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"haunt: unrecognized option '~a'~%"
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opt)
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(show-haunt-usage))
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((command args ...)
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(apply run-haunt-command (string->symbol command) args))))
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