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Add dir options to (lib:import->filename)

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This commit is contained in:
Justin Ethier 2017-01-31 17:51:37 -05:00
parent 7b927d8b35
commit bda80e8856
1 changed files with 33 additions and 9 deletions
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42
scheme/cyclone/libraries.sld
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@ -187,12 +187,23 @@
(error "Unexpected type in import set"))))
;; Resolve library filename given an import.
;; Assumes ".sld" file extension if one is not specified.
(define (lib:import->filename import . ext)
;; Options:
;; - Extension, assumes ".sld" file extension if one is not specified.
;; - Append path, list of strings
;; - Prepend path, list of strings
(define (lib:import->filename import . opts)
(let* ((file-ext
(if (null? ext)
(if (null? opts)
".sld"
(car ext)))
(car opts)))
(append-dirs
(if (or (null? opts) (null? (cdr opts)))
'()
(cadr opts)))
(prepend-dirs
(if (or (null? opts) (null? (cdr opts)) (null? (cddr opts)))
'()
(caddr opts)))
(filename*
(string-append
(apply
@ -203,11 +214,24 @@
import))
file-ext))
(filename
(substring filename* 1 (string-length filename*))))
(if (or (tagged-list? 'scheme import)
(tagged-list? 'srfi import))
(string-append (Cyc-installation-dir 'sld) "/" filename) ;; Built-in library
filename)))
(substring filename* 1 (string-length filename*)))
(dir (if (or (tagged-list? 'scheme import)
(tagged-list? 'srfi import))
(Cyc-installation-dir 'sld)
"")))
(call/cc
(lambda (return)
(for-each
(lambda (path)
(let ((f (string-append path "/" filename)))
(if (file-exists? f)
(return f))))
(append prepend-dirs (list dir) append-dirs))
;; Not found, just return base name
(if (> (string-length dir) 0)
(string-append dir "/" filename)
filename)))
))
;; Get path to directory that contains the library
(define (lib:import->path import)