40 lines
1.3 KiB
Common Lisp
40 lines
1.3 KiB
Common Lisp
;;;; config.lisp
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(in-package #:ql-config)
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(defun config-value-file-pathname (path)
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(let ((bad-position (position #\Space path)))
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(when bad-position
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(error "Space not allowed at position ~D in ~S"
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bad-position
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path)))
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(let* ((space-path (substitute #\Space #\/ path))
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(split (split-spaces space-path))
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(directory-parts (butlast split))
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(name (first (last split)))
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(base (qmerge "config/")))
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(merge-pathnames
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(make-pathname :name name
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:type "txt"
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:directory (list* :relative directory-parts))
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base)))
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(defun config-value (path)
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(let ((file (config-value-file-pathname path)))
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(with-open-file (stream file :if-does-not-exist nil)
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(when stream
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(values (read-line stream nil))))))
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(defun (setf config-value) (new-value path)
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(let ((file (config-value-file-pathname path)))
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(typecase new-value
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(null
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(delete-file-if-exists file))
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(string
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(ensure-directories-exist file)
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(with-open-file (stream file :direction :output
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:if-does-not-exist :create
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:if-exists :rename-and-delete)
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(write-line new-value stream)))
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(t
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(error "Bad config value ~S; must be a string or NIL" new-value)))))
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