parse-defsystem.lisp 15.9 KB
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;;;; -------------------------------------------------------------------------
;;;; Defsystem

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(uiop/package:define-package :asdf/parse-defsystem
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  (:recycle :asdf/parse-defsystem :asdf/defsystem :asdf)
  (:nicknames :asdf/defsystem) ;; previous name, to be compatible with, in case anyone cares
  (:use :uiop/common-lisp :asdf/driver :asdf/upgrade
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   :asdf/cache :asdf/component :asdf/system
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   :asdf/find-system :asdf/find-component :asdf/action :asdf/lisp-action :asdf/operate)
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  (:import-from :asdf/system #:depends-on #:weakly-depends-on)
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  (:export
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   #:defsystem #:register-system-definition
   #:class-for-type #:*default-component-class*
   #:determine-system-directory #:parse-component-form
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   #:non-toplevel-system #:non-system-system
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   #:sysdef-error-component #:check-component-input))
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(in-package :asdf/parse-defsystem)
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;;; Pathname
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(with-upgradability ()
  (defun determine-system-directory (pathname)
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    ;; The defsystem macro calls this function to determine the pathname of a system as follows:
    ;; 1. If the pathname argument is an pathname object (NOT a namestring),
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    ;;    that is already an absolute pathname, return it.
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    ;; 2. Otherwise, the directory containing the LOAD-PATHNAME
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    ;;    is considered (as deduced from e.g. *LOAD-PATHNAME*), and
    ;;    if it is indeed available and an absolute pathname, then
    ;;    the PATHNAME argument is normalized to a relative pathname
    ;;    as per PARSE-UNIX-NAMESTRING (with ENSURE-DIRECTORY T)
    ;;    and merged into that DIRECTORY as per SUBPATHNAME.
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    ;;    Note: avoid *COMPILE-FILE-PATHNAME* because the .asd is loaded as source,
    ;;    but may be from within the EVAL-WHEN of a file compilation.
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    ;; If no absolute pathname was found, we return NIL.
    (check-type pathname (or null string pathname))
    (pathname-directory-pathname
     (resolve-symlinks*
      (ensure-absolute-pathname
       (parse-unix-namestring pathname :type :directory)
       #'(lambda () (ensure-absolute-pathname
                     (load-pathname) 'get-pathname-defaults nil))
       nil)))))
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;;; Component class
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(with-upgradability ()
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  ;; What :file gets interpreted as, unless overridden by a :default-component-class
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  (defvar *default-component-class* 'cl-source-file)

  (defun class-for-type (parent type)
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      (or (coerce-class type :package :asdf/interface :super 'component :error nil)
          (and (eq type :file)
               (coerce-class
                (or (loop :for p = parent :then (component-parent p) :while p
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                      :thereis (module-default-component-class p))
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                    *default-component-class*)
                :package :asdf/interface :super 'component :error nil))
          (sysdef-error "don't recognize component type ~S" type))))
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;;; Check inputs
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(with-upgradability ()
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  (define-condition non-system-system (system-definition-error)
    ((name :initarg :name :reader non-system-system-name)
     (class-name :initarg :class-name :reader non-system-system-class-name))
    (:report (lambda (c s)
               (format s (compatfmt "~@<Error while defining system ~S: class ~S isn't a subclass of ~S~@:>")
                       (non-system-system-name c) (non-system-system-class-name c) 'system))))

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  (define-condition non-toplevel-system (system-definition-error)
    ((parent :initarg :parent :reader non-toplevel-system-parent)
     (name :initarg :name :reader non-toplevel-system-name))
    (:report (lambda (c s)
               (format s (compatfmt "~@<Error while defining system: component ~S claims to have a system ~S as a child~@:>")
                       (non-toplevel-system-parent c) (non-toplevel-system-name c)))))

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  (defun sysdef-error-component (msg type name value)
    (sysdef-error (strcat msg (compatfmt "~&~@<The value specified for ~(~A~) ~A is ~S~@:>"))
                  type name value))

  (defun check-component-input (type name weakly-depends-on
                                depends-on components)
    "A partial test of the values of a component."
    (unless (listp depends-on)
      (sysdef-error-component ":depends-on must be a list."
                              type name depends-on))
    (unless (listp weakly-depends-on)
      (sysdef-error-component ":weakly-depends-on must be a list."
                              type name weakly-depends-on))
    (unless (listp components)
      (sysdef-error-component ":components must be NIL or a list of components."
                              type name components)))

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  ;; Given a form used as :version specification, in the context of a system definition
  ;; in a file at PATHNAME, for given COMPONENT with given PARENT, normalize the form
  ;; to an acceptable ASDF-format version.
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  (defun* (normalize-version) (form &key pathname component parent)
    (labels ((invalid (&optional (continuation "using NIL instead"))
               (warn (compatfmt "~@<Invalid :version specifier ~S~@[ for component ~S~]~@[ in ~S~]~@[ from file ~S~]~@[, ~A~]~@:>")
                     form component parent pathname continuation))
             (invalid-parse (control &rest args)
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               (unless (if-let (target (find-component parent component)) (builtin-system-p target))
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                 (apply 'warn control args)
                 (invalid))))
      (if-let (v (typecase form
                   ((or string null) form)
                   (real
                    (invalid "Substituting a string")
                    (format nil "~D" form)) ;; 1.0 becomes "1.0"
                   (cons
                    (case (first form)
                      ((:read-file-form)
                       (destructuring-bind (subpath &key (at 0)) (rest form)
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                         (safe-read-file-form (subpathname pathname subpath)
                                              :at at :package :asdf-user)))
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                      ((:read-file-line)
                       (destructuring-bind (subpath &key (at 0)) (rest form)
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                         (safe-read-file-line (subpathname pathname subpath)
                                              :at at)))
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                      (otherwise
                       (invalid))))
                   (t
                    (invalid))))
        (if-let (pv (parse-version v #'invalid-parse))
          (unparse-version pv)
          (invalid))))))
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;;; "inline methods"
(with-upgradability ()
  (defparameter* +asdf-methods+
    '(perform-with-restarts perform explain output-files operation-done-p))

  (defun %remove-component-inline-methods (component)
    (dolist (name +asdf-methods+)
      (map ()
           ;; this is inefficient as most of the stored
           ;; methods will not be for this particular gf
           ;; But this is hardly performance-critical
           #'(lambda (m)
               (remove-method (symbol-function name) m))
           (component-inline-methods component)))
    (component-inline-methods component) nil)

  (defun %define-component-inline-methods (ret rest)
    (loop* :for (key value) :on rest :by #'cddr
           :for name = (and (keywordp key) (find key +asdf-methods+ :test 'string=))
           :when name :do
           (destructuring-bind (op &rest body) value
             (loop :for arg = (pop body)
                   :while (atom arg)
                   :collect arg :into qualifiers
                   :finally
                      (destructuring-bind (o c) arg
                        (pushnew
                         (eval `(defmethod ,name ,@qualifiers ((,o ,op) (,c (eql ,ret))) ,@body))
                         (component-inline-methods ret)))))))

  (defun %refresh-component-inline-methods (component rest)
    ;; clear methods, then add the new ones
    (%remove-component-inline-methods component)
    (%define-component-inline-methods component rest)))


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;;; Main parsing function
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(with-upgradability ()
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  (defun parse-dependency-def (dd)
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    (if (listp dd)
        (case (first dd)
          (:feature
           (unless (= (length dd) 3)
             (sysdef-error "Ill-formed feature dependency: ~s" dd))
           (let ((embedded (parse-dependency-def (third dd))))
             `(:feature ,(second dd) ,embedded)))
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          (feature
           (sysdef-error "`feature' has been removed from the dependency spec language of ASDF. Use :feature instead in ~s." dd))
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          (:require
           (unless (= (length dd) 2)
             (sysdef-error "Ill-formed require dependency: ~s" dd))
           dd)
          (:version
           (unless (= (length dd) 3)
             (sysdef-error "Ill-formed version dependency: ~s" dd))
           `(:version ,(coerce-name (second dd)) ,(third dd)))
          (otherwise (sysdef-error "Ill-formed dependency: ~s" dd)))
      (coerce-name dd)))

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  (defun parse-dependency-defs (dd-list)
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    "Parse the dependency defs in DD-LIST into canonical form by translating all
system names contained using COERCE-NAME. Return the result."
    (mapcar 'parse-dependency-def dd-list))

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  (defun* (parse-component-form) (parent options &key previous-serial-component)
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    (destructuring-bind
        (type name &rest rest &key
                                (builtin-system-p () bspp)
                                ;; the following list of keywords is reproduced below in the
                                ;; remove-plist-keys form.  important to keep them in sync
                                components pathname perform explain output-files operation-done-p
                                weakly-depends-on depends-on serial
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                                do-first if-component-dep-fails version
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                                ;; list ends
         &allow-other-keys) options
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Francois-Rene Rideau committed
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      (declare (ignore perform explain output-files operation-done-p builtin-system-p))
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      (check-component-input type name weakly-depends-on depends-on components)
      (when (and parent
                 (find-component parent name)
                 (not ;; ignore the same object when rereading the defsystem
                  (typep (find-component parent name)
                         (class-for-type parent type))))
        (error 'duplicate-names :name name))
      (when do-first (error "DO-FIRST is not supported anymore as of ASDF 3"))
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      (let* ((name (coerce-name name))
             (args `(:name ,name
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                     :pathname ,pathname
                     ,@(when parent `(:parent ,parent))
                     ,@(remove-plist-keys
                        '(:components :pathname :if-component-dep-fails :version
                          :perform :explain :output-files :operation-done-p
                          :weakly-depends-on :depends-on :serial)
                        rest)))
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             (component (find-component parent name))
             (class (class-for-type parent type)))
        (when (and parent (subtypep class 'system))
          (error 'non-toplevel-system :parent parent :name name))
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        (if component ; preserve identity
            (apply 'reinitialize-instance component args)
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            (setf component (apply 'make-instance class args)))
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        (component-pathname component) ; eagerly compute the absolute pathname
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        (when (typep component 'system)
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          ;; cache information for introspection
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          (setf (slot-value component 'depends-on)
                (parse-dependency-defs depends-on)
                (slot-value component 'weakly-depends-on)
                ;; these must be a list of systems, cannot be features or versioned systems
                (mapcar 'coerce-name weakly-depends-on)))
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        (let ((sysfile (system-source-file (component-system component)))) ;; requires the previous
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          (when (and (typep component 'system) (not bspp))
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            (setf (builtin-system-p component) (lisp-implementation-pathname-p sysfile)))
          (setf version (normalize-version version :component name :parent parent :pathname sysfile)))
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        ;; Don't use the accessor: kluge to avoid upgrade issue on CCL 1.8.
        ;; A better fix is required.
        (setf (slot-value component 'version) version)
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        (when (typep component 'parent-component)
          (setf (component-children component)
                (loop
                  :with previous-component = nil
                  :for c-form :in components
                  :for c = (parse-component-form component c-form
                                                 :previous-serial-component previous-component)
                  :for name = (component-name c)
                  :collect c
                  :when serial :do (setf previous-component name)))
          (compute-children-by-name component))
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        (when previous-serial-component
          (push previous-serial-component depends-on))
        (when weakly-depends-on
          ;; ASDF4: deprecate this feature and remove it.
          (appendf depends-on
                   (remove-if (complement #'(lambda (x) (find-system x nil))) weakly-depends-on)))
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        ;; Used by POIU. ASDF4: rename to component-depends-on?
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        (setf (component-sideway-dependencies component) depends-on)
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        (%refresh-component-inline-methods component rest)
        (when if-component-dep-fails
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          (error "The system definition for ~S uses deprecated ~
            ASDF option :IF-COMPONENT-DEP-FAILS. ~
            Starting with ASDF 3, please use :IF-FEATURE instead"
           (coerce-name (component-system component))))
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        component)))

  (defun register-system-definition
      (name &rest options &key pathname (class 'system) (source-file () sfp)
                            defsystem-depends-on &allow-other-keys)
    ;; The system must be registered before we parse the body,
    ;; otherwise we recur when trying to find an existing system
    ;; of the same name to reuse options (e.g. pathname) from.
    ;; To avoid infinite recursion in cases where you defsystem a system
    ;; that is registered to a different location to find-system,
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    ;; we also need to remember it in the asdf-cache.
    (with-asdf-cache ()
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      (let* ((name (coerce-name name))
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             (source-file (if sfp source-file (resolve-symlinks* (load-pathname))))
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             ;; NB: handle defsystem-depends-on BEFORE to create the system object,
             ;; so that in case it fails, there is no incomplete object polluting the build.
             (checked-defsystem-depends-on
               (let* ((dep-forms (parse-dependency-defs defsystem-depends-on))
                      (deps (loop :for spec :in dep-forms
                                  :when (resolve-dependency-spec nil spec)
                                    :collect :it)))
                 (load-systems* deps)
                 dep-forms))
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             (registered (system-registered-p name))
             (registered! (if registered
                              (rplaca registered (get-file-stamp source-file))
                              (register-system
                               (make-instance 'system :name name :source-file source-file))))
             (system (reset-system (cdr registered!)
                                   :name name :source-file source-file))
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             (component-options
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              (append
               (remove-plist-keys '(:defsystem-depends-on :class) options)
               ;; cache defsystem-depends-on in canonical form
               (when checked-defsystem-depends-on
                 `(:defsystem-depends-on ,checked-defsystem-depends-on)))))
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        ;; This works hand in hand with asdf/find-system:find-system-if-being-defined:
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        (set-asdf-cache-entry `(find-system ,name) (list system))
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        ;; We change-class AFTER we loaded the defsystem-depends-on
        ;; since the class might be defined as part of those.
        (let ((class (class-for-type nil class)))
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          (unless (subtypep class 'system)
            (error 'non-system-system :name name :class-name (class-name class)))
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          (unless (eq (type-of system) class)
            (change-class system class)))
        (parse-component-form
         nil (list*
              :module name
              :pathname (determine-system-directory pathname)
              component-options)))))

  (defmacro defsystem (name &body options)
    `(apply 'register-system-definition ',name ',options)))