Browse Source
This was for Guile < 2.0.9 and we've been requiring 2.0.9+ for some time already. * configure.ac: Remove 'GUIX_CHECK_SRFI_37' use and 'INSTALL_SRFI_37' conditional. * Makefile.am: Remove code in "if INSTALL_SRFI_37". (EXTRA_DIST): Remove srfi/srfi-37.scm.in. * srfi/srfi-37.scm.in: Remove. * m4/guix.m4 (GUIX_CHECK_SRFI_37): Remove.wip-gexp-hygiene
Ludovic Courtès
5 years ago
4 changed files with 0 additions and 269 deletions
@ -1,233 +0,0 @@ |
|||
;;; srfi-37.scm --- args-fold |
|||
|
|||
;; Copyright (C) 2007, 2008, 2013 Free Software Foundation, Inc. |
|||
;; |
|||
;; This library is free software; you can redistribute it and/or |
|||
;; modify it under the terms of the GNU Lesser General Public |
|||
;; License as published by the Free Software Foundation; either |
|||
;; version 3 of the License, or (at your option) any later version. |
|||
;; |
|||
;; This library 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 |
|||
;; Lesser General Public License for more details. |
|||
;; |
|||
;; You should have received a copy of the GNU Lesser General Public |
|||
;; License along with this library; if not, write to the Free Software |
|||
;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|||
|
|||
|
|||
;;; Commentary: |
|||
;; |
|||
;; To use this module with Guile, use (cdr (program-arguments)) as |
|||
;; the ARGS argument to `args-fold'. Here is a short example: |
|||
;; |
|||
;; (args-fold (cdr (program-arguments)) |
|||
;; (let ((display-and-exit-proc |
|||
;; (lambda (msg) |
|||
;; (lambda (opt name arg) |
|||
;; (display msg) (quit) (values))))) |
|||
;; (list (option '(#\v "version") #f #f |
|||
;; (display-and-exit-proc "Foo version 42.0\n")) |
|||
;; (option '(#\h "help") #f #f |
|||
;; (display-and-exit-proc |
|||
;; "Usage: foo scheme-file ...")))) |
|||
;; (lambda (opt name arg) |
|||
;; (error "Unrecognized option `~A'" name)) |
|||
;; (lambda (op) (load op) (values))) |
|||
;; |
|||
;;; Code: |
|||
|
|||
|
|||
;;;; Module definition & exports |
|||
(define-module (srfi srfi-37) |
|||
#:use-module (srfi srfi-9) |
|||
#:export (option option-names option-required-arg? |
|||
option-optional-arg? option-processor |
|||
args-fold)) |
|||
|
|||
(cond-expand-provide (current-module) '(srfi-37)) |
|||
|
|||
;;;; args-fold and periphery procedures |
|||
|
|||
;;; An option as answered by `option'. `names' is a list of |
|||
;;; characters and strings, representing associated short-options and |
|||
;;; long-options respectively that should use this option's |
|||
;;; `processor' in an `args-fold' call. |
|||
;;; |
|||
;;; `required-arg?' and `optional-arg?' are mutually exclusive |
|||
;;; booleans and indicate whether an argument must be or may be |
|||
;;; provided. Besides the obvious, this affects semantics of |
|||
;;; short-options, as short-options with a required or optional |
|||
;;; argument cannot be followed by other short options in the same |
|||
;;; program-arguments string, as they will be interpreted collectively |
|||
;;; as the option's argument. |
|||
;;; |
|||
;;; `processor' is called when this option is encountered. It should |
|||
;;; accept the containing option, the element of `names' (by `equal?') |
|||
;;; encountered, the option's argument (or #f if none), and the seeds |
|||
;;; as variadic arguments, answering the new seeds as values. |
|||
(define-record-type srfi-37:option |
|||
(option names required-arg? optional-arg? processor) |
|||
option? |
|||
(names option-names) |
|||
(required-arg? option-required-arg?) |
|||
(optional-arg? option-optional-arg?) |
|||
(processor option-processor)) |
|||
|
|||
(define (error-duplicate-option option-name) |
|||
(scm-error 'program-error "args-fold" |
|||
"Duplicate option name `~A~A'" |
|||
(list (if (char? option-name) #\- "--") |
|||
option-name) |
|||
#f)) |
|||
|
|||
(define (build-options-lookup options) |
|||
"Answer an `equal?' Guile hash-table that maps OPTIONS' names back |
|||
to the containing options, signalling an error if a name is |
|||
encountered more than once." |
|||
(let ((lookup (make-hash-table (* 2 (length options))))) |
|||
(for-each |
|||
(lambda (opt) |
|||
(for-each (lambda (name) |
|||
(let ((assoc (hash-create-handle! |
|||
lookup name #f))) |
|||
(if (cdr assoc) |
|||
(error-duplicate-option (car assoc)) |
|||
(set-cdr! assoc opt)))) |
|||
(option-names opt))) |
|||
options) |
|||
lookup)) |
|||
|
|||
(define (args-fold args options unrecognized-option-proc |
|||
operand-proc . seeds) |
|||
"Answer the results of folding SEEDS as multiple values against the |
|||
program-arguments in ARGS, as decided by the OPTIONS' |
|||
`option-processor's, UNRECOGNIZED-OPTION-PROC, and OPERAND-PROC." |
|||
(let ((lookup (build-options-lookup options))) |
|||
;; I don't like Guile's `error' here |
|||
(define (error msg . args) |
|||
(scm-error 'misc-error "args-fold" msg args #f)) |
|||
|
|||
(define (mutate-seeds! procedure . params) |
|||
(set! seeds (call-with-values |
|||
(lambda () |
|||
(apply procedure (append params seeds))) |
|||
list))) |
|||
|
|||
;; Clean up the rest of ARGS, assuming they're all operands. |
|||
(define (rest-operands) |
|||
(for-each (lambda (arg) (mutate-seeds! operand-proc arg)) |
|||
args) |
|||
(set! args '())) |
|||
|
|||
;; Call OPT's processor with OPT, NAME, an argument to be decided, |
|||
;; and the seeds. Depending on OPT's *-arg? specification, get |
|||
;; the parameter by calling REQ-ARG-PROC or OPT-ARG-PROC thunks; |
|||
;; if no argument is allowed, call NO-ARG-PROC thunk. |
|||
(define (invoke-option-processor |
|||
opt name req-arg-proc opt-arg-proc no-arg-proc) |
|||
(mutate-seeds! |
|||
(option-processor opt) opt name |
|||
(cond ((option-required-arg? opt) (req-arg-proc)) |
|||
((option-optional-arg? opt) (opt-arg-proc)) |
|||
(else (no-arg-proc) #f)))) |
|||
|
|||
;; Compute and answer a short option argument, advancing ARGS as |
|||
;; necessary, for the short option whose character is at POSITION |
|||
;; in the current ARG. |
|||
(define (short-option-argument position) |
|||
(cond ((< (1+ position) (string-length (car args))) |
|||
(let ((result (substring (car args) (1+ position)))) |
|||
(set! args (cdr args)) |
|||
result)) |
|||
((pair? (cdr args)) |
|||
(let ((result (cadr args))) |
|||
(set! args (cddr args)) |
|||
result)) |
|||
((pair? args) |
|||
(set! args (cdr args)) |
|||
#f) |
|||
(else #f))) |
|||
|
|||
;; Interpret the short-option at index POSITION in (car ARGS), |
|||
;; followed by the remaining short options in (car ARGS). |
|||
(define (short-option position) |
|||
(if (>= position (string-length (car args))) |
|||
(begin |
|||
(set! args (cdr args)) |
|||
(next-arg)) |
|||
(let* ((opt-name (string-ref (car args) position)) |
|||
(option-here (hash-ref lookup opt-name))) |
|||
(cond ((not option-here) |
|||
(mutate-seeds! unrecognized-option-proc |
|||
(option (list opt-name) #f #f |
|||
unrecognized-option-proc) |
|||
opt-name #f) |
|||
(short-option (1+ position))) |
|||
(else |
|||
(invoke-option-processor |
|||
option-here opt-name |
|||
(lambda () |
|||
(or (short-option-argument position) |
|||
(error "Missing required argument after `-~A'" opt-name))) |
|||
(lambda () |
|||
;; edge case: -xo -zf or -xo -- where opt-name=#\o |
|||
;; GNU getopt_long resolves these like I do |
|||
(short-option-argument position)) |
|||
(lambda () #f)) |
|||
(if (not (or (option-required-arg? option-here) |
|||
(option-optional-arg? option-here))) |
|||
(short-option (1+ position)))))))) |
|||
|
|||
;; Process the long option in (car ARGS). We make the |
|||
;; interesting, possibly non-standard assumption that long option |
|||
;; names might contain #\=, so keep looking for more #\= in (car |
|||
;; ARGS) until we find a named option in lookup. |
|||
(define (long-option) |
|||
(let ((arg (car args))) |
|||
(let place-=-after ((start-pos 2)) |
|||
(let* ((index (string-index arg #\= start-pos)) |
|||
(opt-name (substring arg 2 (or index (string-length arg)))) |
|||
(option-here (hash-ref lookup opt-name))) |
|||
(if (not option-here) |
|||
;; look for a later #\=, unless there can't be one |
|||
(if index |
|||
(place-=-after (1+ index)) |
|||
(mutate-seeds! |
|||
unrecognized-option-proc |
|||
(option (list opt-name) #f #f unrecognized-option-proc) |
|||
opt-name #f)) |
|||
(invoke-option-processor |
|||
option-here opt-name |
|||
(lambda () |
|||
(if index |
|||
(substring arg (1+ index)) |
|||
(error "Missing required argument after `--~A'" opt-name))) |
|||
(lambda () (and index (substring arg (1+ index)))) |
|||
(lambda () |
|||
(if index |
|||
(error "Extraneous argument after `--~A'" opt-name)))))))) |
|||
(set! args (cdr args))) |
|||
|
|||
;; Process the remaining in ARGS. Basically like calling |
|||
;; `args-fold', but without having to regenerate `lookup' and the |
|||
;; funcs above. |
|||
(define (next-arg) |
|||
(if (null? args) |
|||
(apply values seeds) |
|||
(let ((arg (car args))) |
|||
(cond ((or (not (char=? #\- (string-ref arg 0))) |
|||
(= 1 (string-length arg))) ;"-" |
|||
(mutate-seeds! operand-proc arg) |
|||
(set! args (cdr args))) |
|||
((char=? #\- (string-ref arg 1)) |
|||
(if (= 2 (string-length arg)) ;"--" |
|||
(begin (set! args (cdr args)) (rest-operands)) |
|||
(long-option))) |
|||
(else (short-option 1))) |
|||
(next-arg)))) |
|||
|
|||
(next-arg))) |
|||
|
|||
;;; srfi-37.scm ends here |
|||
Loading…
Reference in new issue