system.lisp 3.6 KB
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;;;; -------------------------------------------------------------------------
;;;; Systems

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(asdf/package:define-package :asdf/system
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  (:recycle :asdf :asdf/system)
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  (:use :asdf/common-lisp :asdf/driver :asdf/upgrade :asdf/component)
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  (:export
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   #:system #:proto-system
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   #:system-source-file #:system-source-directory #:system-relative-pathname
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   #:reset-system
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   #:system-description #:system-long-description
   #:system-author #:system-maintainer #:system-licence #:system-license
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   #:system-defsystem-depends-on
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   #:component-build-pathname #:build-pathname
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   #:component-entry-point #:entry-point
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   #:find-system #:builtin-system-p)) ;; forward-reference, defined in find-system
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(in-package :asdf/system)

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(defgeneric* (find-system) (system &optional error-p))
(defgeneric* (system-source-file) (system)
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  (:documentation "Return the source file in which system is defined."))
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(defgeneric* builtin-system-p (system))
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(defgeneric* component-build-pathname (component))
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(defgeneric* component-entry-point (component))
(defmethod component-entry-point ((c component))
  (declare (ignorable c))
  nil)


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;;;; The system class
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(defclass proto-system () ; slots to keep when resetting a system
  ;; To preserve identity for all objects, we'd need keep the components slots
  ;; but also to modify parse-component-form to reset the recycled objects.
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  ((name) (source-file) #|(children) (children-by-names)|#))
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(defclass system (module proto-system)
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  ;; Backward-compatibility: inherit from module. ASDF4: only inherit from parent-component.
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  (;; {,long-}description is now inherited from component, but we add the legacy accessors
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   (description :accessor system-description)
   (long-description :accessor system-long-description)
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   (author :accessor system-author :initarg :author)
   (maintainer :accessor system-maintainer :initarg :maintainer)
   (licence :accessor system-licence :initarg :licence
            :accessor system-license :initarg :license)
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   (build-pathname
    :initform nil :initarg :build-pathname :accessor component-build-pathname)
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   (entry-point
    :initform nil :initarg :entry-point :accessor component-entry-point)
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   (source-file :initform nil :initarg :source-file :accessor system-source-file)
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   (defsystem-depends-on :reader system-defsystem-depends-on :initarg :defsystem-depends-on)))

(defun* reset-system (system &rest keys &key &allow-other-keys)
  (change-class (change-class system 'proto-system) 'system)
  (apply 'reinitialize-instance system keys))


;;;; Pathnames

(defmethod system-source-file ((system-name string))
  (system-source-file (find-system system-name)))
(defmethod system-source-file ((system-name symbol))
  (system-source-file (find-system system-name)))

(defun* system-source-directory (system-designator)
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  "Return a pathname object corresponding to the directory
in which the system specification (.asd file) is located."
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  (pathname-directory-pathname (system-source-file system-designator)))

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(defun* (system-relative-pathname) (system name &key type)
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  (subpathname (system-source-directory system) name :type type))

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(defmethod component-pathname ((system system))
  (or (call-next-method)
      (system-source-directory system)))

(defmethod component-relative-pathname ((system system))
  (parse-unix-namestring
   (and (slot-boundp system 'relative-pathname)
        (slot-value system 'relative-pathname))
   :want-relative t
   :type :directory
   :ensure-absolute t
   :defaults (system-source-directory system)))

(defmethod component-parent-pathname ((system system))
  (system-source-directory system))

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(defmethod component-build-pathname ((c component))
  (declare (ignorable c))
  nil)