On Wed, 2013-01-23 at 19:28 +0800, Nala Ginrut wrote:
> As I talked with Andy, we may add a feature to list all available
> languages. And if users add a new language to the %load-path, they may
> see it listed out. Besides, this feature could be used in 'guild
> compile' to detect all the language available.
>
> Attached is a proc named 'get-all-available-languages', it'll scan all %
> load-path and list the union of the languages available.
>
> Please review it.
> If accepted, I'll format a patch into (ice-9 command-line).
>
> Thanks!
I think Regular Expression would better choice ;-p
New patch attached.
(use-modules (ice-9 ftw) (srfi srfi-1))
(define (not-inner-lang? str)
(not (string-match
"glil|glil\\.scm|assembly|assembly\\.scm|bytecode|objcode\\.scm|objcode|tree-il|tree-il\\.scm|value|\\.\\.|\\."
str)))
(define (get-all-available-languages)
(let lp((rest (map (lambda (x) (string-append x "/language")) %load-path)) (result '()))
(cond
((null? rest) (apply lset-union string=? result))
(else
(let ((ll (scandir (car rest) not-inner-lang?)))
(lp (cdr rest) (if ll (cons ll result) result)))))))
