1 ;;;; This software is part of the SBCL system. See the README file for
4 ;;;; This software is derived from the CMU CL system, which was
5 ;;;; written at Carnegie Mellon University and released into the
6 ;;;; public domain. The software is in the public domain and is
7 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
8 ;;;; files for more information.
10 (in-package "SB-COLD")
12 ;;; an entry in the table which describes the non-standard part (i.e. not
13 ;;; CL/CL-USER/KEYWORD) of the package structure of the SBCL system
15 ;;; We make no attempt to be fully general; our table doesn't need to be
16 ;;; able to express features which we don't happen to use.
17 (export '(package-data
19 package-data-nicknames
22 package-data-import-from
24 (defstruct package-data
25 ;; a string designator for the package name
26 (name (error "missing PACKAGE-DATA-NAME datum"))
28 (doc (error "missing PACKAGE-DOC datum"))
29 ;; a list of string designators for package nicknames
31 ;; a tree containing names for exported symbols which'll be set up at package
32 ;; creation time, and NILs, which are ignored. (This is a tree in order to
33 ;; allow constructs like '("ENOSPC" #!+LINUX ("EDQUOT" "EISNAM" "ENAVAIL"
34 ;; "EREMOTEIO")) to be used in initialization. NIL entries in the tree are
35 ;; ignored for the same reason of notational convenience.)
37 ;; a list of string designators for exported symbols which don't necessarily
38 ;; originate in this package (so their EXPORT operations should be handled
39 ;; after USE operations have been done, so that duplicates aren't created)
41 ;; a list of sublists describing imports. Each sublist has the format as an
42 ;; IMPORT-FROM list in DEFPACKAGE: the first element is the name of the
43 ;; package to import from, and the remaining elements are the names of
46 ;; a tree of string designators for package names of other packages
47 ;; which this package uses
50 (let ((package-data-list (read-from-file "package-data-list.lisp-expr")))
52 ;; Build all packages that we need, and initialize them as far as we
53 ;; can without referring to any other packages.
54 (dolist (package-data package-data-list)
55 (let* ((package (make-package
56 (package-data-name package-data)
57 :nicknames (package-data-nicknames package-data)
59 #!+sb-doc (setf (documentation package t)
60 (package-data-doc package-data))
61 ;; Walk the tree of exported names, exporting each name.
62 (labels ((recurse (tree)
64 ;; FIXME: The comments above say the structure is a tree,
65 ;; but here we're sleazily treating it as though
66 ;; dotted lists never occur. Replace this LIST case
67 ;; with separate NULL and CONS cases to fix this.
68 (list (mapc #'recurse tree))
69 (string (export (intern tree package) package)))))
70 (recurse (package-data-export package-data)))))
72 ;; Now that all packages exist, we can set up package-package
74 (dolist (package-data package-data-list)
75 (use-package (package-data-use package-data)
76 (package-data-name package-data))
77 (dolist (sublist (package-data-import-from package-data))
78 (let* ((from-package (first sublist))
79 (symbol-names (rest sublist))
80 (symbols (mapcar (lambda (name)
81 ;; old way, broke for importing symbols
82 ;; like SB!C::DEBUG-SOURCE-FORM into
83 ;; SB!DI -- WHN 19990714
85 (let ((s (find-symbol name from-package)))
87 (error "can't find ~S in ~S"
91 ;; new way, works for SB!DI stuff
93 (intern name from-package))
95 (import symbols (package-data-name package-data)))))
97 ;; Now that all package-package references exist, we can handle
98 ;; REEXPORT operations. (We have to wait until now because they
99 ;; interact with USE operations.) KLUDGE: This code doesn't detect
100 ;; dependencies and do exports in proper order to work around them, so
101 ;; it could break randomly (with build-time errors, not with silent
102 ;; errors or runtime errors) if multiple levels of re-exportation are
103 ;; used, e.g. package A exports X, package B uses A and reexports X,
104 ;; and package C uses B and reexports X. That doesn't seem to be an
105 ;; issue in the current code, and it's hard to see why anyone would
106 ;; want to do it, and it should be straightforward (though tedious) to
107 ;; extend the code here to deal with that if it ever becomes necessary.
108 (dolist (package-data package-data-list)
109 (let ((package (find-package (package-data-name package-data))))
110 (dolist (symbol-name (package-data-reexport package-data))
111 (multiple-value-bind (symbol status)
112 (find-symbol symbol-name package)
114 (error "No symbol named ~S is accessible in ~S."
117 (when (eq (symbol-package symbol) package)
118 (error "~S is not inherited/imported, but native to ~S."
121 (export symbol package))))))