mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-11-16 06:45:16 +01:00
473 lines
18 KiB
Common Lisp
473 lines
18 KiB
Common Lisp
(unless (find-package :ql-to-nix-util)
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(load "util.lisp"))
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(unless (find-package :ql-to-nix-quicklisp-bootstrap)
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(load "quicklisp-bootstrap.lisp"))
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(defpackage :ql-to-nix-system-info
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(:use :common-lisp :ql-to-nix-quicklisp-bootstrap :ql-to-nix-util)
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(:export #:dump-image))
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(in-package :ql-to-nix-system-info)
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(declaim (optimize (debug 3) (speed 0) (space 0) (compilation-speed 0) (safety 3)))
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;; This file cannot have any dependencies beyond quicklisp and asdf.
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;; Otherwise, we'll miss some dependencies!
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;; We can't load quicklisp until runtime (at which point we'll create
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;; an isolated quicklisp installation). These wrapper functions are
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;; nicer than funcalling intern'd symbols every time we want to talk
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;; to quicklisp.
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(wrap :ql apply-load-strategy)
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(wrap :ql compute-load-strategy)
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(wrap :ql show-load-strategy)
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(wrap :ql quicklisp-systems)
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(wrap :ql ensure-installed)
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(wrap :ql quicklisp-releases)
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(wrap :ql-dist archive-md5)
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(wrap :ql-dist archive-url)
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(wrap :ql-dist ensure-local-archive-file)
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(wrap :ql-dist find-system)
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(wrap :ql-dist local-archive-file)
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(wrap :ql-dist name)
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(wrap :ql-dist provided-systems)
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(wrap :ql-dist release)
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(wrap :ql-dist short-description)
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(wrap :ql-dist system-file-name)
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(wrap :ql-impl-util call-with-quiet-compilation)
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(defvar *version* (uiop:getenv "version")
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"The version number of this program")
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(defvar *main-system* nil
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"The name of the system we're trying to extract info from.")
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(defvar *found-parasites* (make-hash-table :test #'equalp)
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"Names of systems which have been identified as parasites.
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A system is parasitic if its name doesn't match the name of the file
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it is defined in. So, for example, if foo and foo-bar are both
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defined in a file named foo.asd, foo would be the host system and
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foo-bar would be a parasitic system.
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Parasitic systems are not generally loaded without loading the host
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system first.
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Keys are system names. Values are unspecified.")
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(defvar *found-dependencies* (make-hash-table :test #'equalp)
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"Hash table containing the set of dependencies discovered while installing a system.
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Keys are system names. Values are unspecified.")
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(defun decode-asdf-dependency (name)
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"Translates an asdf system dependency description into a system name.
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For example, translates (:version :foo \"1.0\") into \"foo\"."
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(etypecase name
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(symbol
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(setf name (symbol-name name)))
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(string)
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(cons
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(ecase (first name)
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(:version
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(warn "Discarding version information ~A" name)
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;; There's nothing we can do about this. If the version we
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;; have around is good enough, then we're golden. If it isn't
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;; good enough, then we'll error out and let a human figure it
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;; out.
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(setf name (second name))
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(return-from decode-asdf-dependency
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(decode-asdf-dependency name)))
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(:feature
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(if (find (second name) *features*)
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(return-from decode-asdf-dependency
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(decode-asdf-dependency (third name)))
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(progn
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(warn "Dropping dependency due to missing feature: ~A" name)
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(return-from decode-asdf-dependency nil))))
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(:require
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;; This probably isn't a dependency we can satisfy using
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;; quicklisp, but we might as well try anyway.
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(return-from decode-asdf-dependency
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(decode-asdf-dependency (second name)))))))
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(string-downcase name))
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(defun found-new-parasite (system-name)
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"Record that the given system has been identified as a parasite."
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(setf system-name (decode-asdf-dependency system-name))
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(setf (gethash system-name *found-parasites*) t)
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(when (nth-value 1 (gethash system-name *found-dependencies*))
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(error "Found dependency on parasite")))
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(defun known-parasite-p (system-name)
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"Have we previously identified this system as a parasite?"
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(nth-value 1 (gethash system-name *found-parasites*)))
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(defun found-parasites ()
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"Return a vector containing all identified parasites."
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(let ((systems (make-array (hash-table-size *found-parasites*) :fill-pointer 0)))
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(loop :for system :being :the :hash-keys :of *found-parasites* :do
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(vector-push system systems))
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systems))
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(defvar *track-dependencies* nil
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"When this variable is nil, found-new-dependency will not record
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depdendencies.")
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(defun parasitic-relationship-p (potential-host potential-parasite)
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"Returns t if potential-host and potential-parasite have a parasitic relationship.
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See `*found-parasites*'."
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(let ((host-ql-system (find-system potential-host))
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(parasite-ql-system (find-system potential-parasite)))
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(and host-ql-system parasite-ql-system
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(not (equal (name host-ql-system)
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(name parasite-ql-system)))
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(equal (system-file-name host-ql-system)
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(system-file-name parasite-ql-system)))))
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(defun found-new-dependency (name)
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"Record that the given system has been identified as a dependency.
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The named system may not be recorded as a dependency. It may be left
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out for any number of reasons. For example, if `*track-dependencies*'
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is nil then this function does nothing. If the named system isn't a
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quicklisp system, this function does nothing."
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(setf name (decode-asdf-dependency name))
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(unless name
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(return-from found-new-dependency))
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(unless *track-dependencies*
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(return-from found-new-dependency))
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(when (known-parasite-p name)
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(return-from found-new-dependency))
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(when (parasitic-relationship-p *main-system* name)
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(found-new-parasite name)
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(return-from found-new-dependency))
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(unless (find-system name)
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(return-from found-new-dependency))
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(setf (gethash name *found-dependencies*) t))
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(defun forget-dependency (name)
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"Whoops. Did I say that was a dependency? My bad.
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Be very careful using this function! You can remove a system from the
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dependency list, but you can't remove other effects associated with
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this system. For example, transitive dependencies might still be in
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the dependency list."
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(setf name (decode-asdf-dependency name))
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(remhash name *found-dependencies*))
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(defun found-dependencies ()
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"Return a vector containing all identified dependencies."
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(let ((systems (make-array (hash-table-size *found-dependencies*) :fill-pointer 0)))
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(loop :for system :being :the :hash-keys :of *found-dependencies* :do
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(vector-push system systems))
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systems))
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(defun host-system (system-name)
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"If the given system is a parasite, return the name of the system that is its host.
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See `*found-parasites*'."
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(let* ((system (find-system system-name))
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(host-file (system-file-name system)))
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(unless (equalp host-file system-name)
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host-file)))
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(defun get-loaded (system)
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"Try to load the named system using quicklisp and record any
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dependencies quicklisp is aware of.
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Unlike `our-quickload', this function doesn't attempt to install
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missing dependencies."
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;; Let's get this party started!
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(let* ((strategy (compute-load-strategy system))
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(ql-systems (quicklisp-systems strategy)))
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(dolist (dep ql-systems)
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(found-new-dependency (name dep)))
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(show-load-strategy strategy)
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(labels
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((make-go ()
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(apply-load-strategy strategy)))
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(call-with-quiet-compilation #'make-go)
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(let ((asdf-system (asdf:find-system system)))
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;; If ASDF says that it needed a system, then we should
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;; probably track that.
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(dolist (asdf-dep (asdf:component-sideway-dependencies asdf-system))
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(found-new-dependency asdf-dep))
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(dolist (asdf-dep (asdf:system-defsystem-depends-on asdf-system))
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(found-new-dependency asdf-dep))))))
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(defun our-quickload (system)
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"Attempt to install a package like quicklisp would, but record any
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dependencies that are detected during the install."
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(setf system (string-downcase system))
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;; Load it quickly, but do it OUR way. Turns out our way is very
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;; similar to the quicklisp way...
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(let ((already-tried (make-hash-table :test #'equalp))) ;; Case insensitive
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(tagbody
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retry
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(handler-case
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(get-loaded system)
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(asdf/find-component:missing-dependency (e)
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(let ((required-by (asdf/find-component:missing-required-by e))
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(missing (asdf/find-component:missing-requires e)))
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(unless (typep required-by 'asdf:system)
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(error e))
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(when (gethash missing already-tried)
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(error "Dependency loop? ~A" missing))
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(setf (gethash missing already-tried) t)
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(let ((parasitic-p (parasitic-relationship-p *main-system* missing)))
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(if parasitic-p
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(found-new-parasite missing)
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(found-new-dependency missing))
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;; We always want to track the dependencies of systems
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;; that share an asd file with the main system. The
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;; whole asd file should be loadable. Otherwise, we
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;; don't want to include transitive dependencies.
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(let ((*track-dependencies* parasitic-p))
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(our-quickload missing)))
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(format t "Attempting to load ~A again~%" system)
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(go retry)))))))
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(defvar *blacklisted-parasites*
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#("hu.dwim.stefil/documentation" ;; This system depends on :hu.dwim.stefil.test, but it should depend on hu.dwim.stefil/test
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"named-readtables/doc" ;; Dependency cycle between named-readtabes and mgl-pax
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"symbol-munger-test" ;; Dependency cycle between lisp-unit2 and symbol-munger
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"cl-postgres-simple-date-tests" ;; Dependency cycle between cl-postgres and simple-date
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"cl-containers/with-variates") ;; Symbol conflict between cl-variates:next-element, metabang.utilities:next-element
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"A vector of systems that shouldn't be loaded by `quickload-parasitic-systems'.
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These systems are known to be troublemakers. In some sense, all
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parasites are troublemakers (you shouldn't define parasitic systems!).
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However, these systems prevent us from generating nix packages and are
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thus doubly evil.")
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(defvar *blacklisted-parasites-table*
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(let ((ht (make-hash-table :test #'equalp)))
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(loop :for system :across *blacklisted-parasites* :do
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(setf (gethash system ht) t))
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ht)
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"A hash table where each entry in `*blacklisted-parasites*' is an
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entry in the table.")
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(defun blacklisted-parasite-p (system-name)
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"Returns non-nil if the named system is blacklisted"
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(nth-value 1 (gethash system-name *blacklisted-parasites-table*)))
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(defun quickload-parasitic-systems (system)
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"Attempt to load all the systems defined in the same asd as the named system.
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Blacklisted systems are skipped. Dependencies of the identified
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parasitic systems will be tracked."
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(let* ((asdf-system (asdf:find-system system))
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(source-file (asdf:system-source-file asdf-system)))
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(cond
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(source-file
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(loop :for system-name :being :the :hash-keys :of asdf/find-system::*registered-systems* :do
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(when (and (parasitic-relationship-p system system-name)
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(not (blacklisted-parasite-p system-name)))
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(found-new-parasite system-name)
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(let ((*track-dependencies* t))
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(our-quickload system-name)))))
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(t
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(unless (or (equal "uiop" system)
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(equal "asdf" system))
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(warn "No source file for system ~A. Can't identify parasites." system))))))
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(defun determine-dependencies (system)
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"Load the named system and return a sorted vector containing all the
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quicklisp systems that were loaded to satisfy dependencies.
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This function should probably only be called once per process!
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Subsequent calls will miss dependencies identified by earlier calls."
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(tagbody
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retry
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(restart-case
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(let ((*standard-output* (make-broadcast-stream))
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(*trace-output* (make-broadcast-stream))
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(*main-system* system)
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(*track-dependencies* t))
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(our-quickload system)
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(quickload-parasitic-systems system))
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(try-again ()
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:report "Start the quickload over again"
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(go retry))
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(die ()
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:report "Just give up and die"
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(uiop:quit 1))))
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;; Systems can't depend on themselves!
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(forget-dependency system)
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(values))
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(defun parasitic-system-data (parasite-system)
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"Return a plist of information about the given known-parastic system.
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Sometimes we are asked to provide information about a system that is
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actually a parasite. The only correct response is to point them
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toward the host system. The nix package for the host system should
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have all the dependencies for this parasite already recorded.
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The plist is only meant to be consumed by other parts of
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quicklisp-to-nix."
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(let ((host-system (host-system parasite-system)))
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(list
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:system parasite-system
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:host host-system
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:name (string-downcase (format nil "~a" parasite-system))
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:host-name (string-downcase (format nil "~a" host-system)))))
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(defun system-data (system)
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"Produce a plist describing a system.
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The plist is only meant to be consumed by other parts of
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quicklisp-to-nix."
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(when (host-system system)
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(return-from system-data
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(parasitic-system-data system)))
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(determine-dependencies system)
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(let*
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((dependencies (sort (found-dependencies) #'string<))
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(parasites (coerce (sort (found-parasites) #'string<) 'list))
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(ql-system (find-system system))
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(ql-release (release ql-system))
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(ql-sibling-systems (provided-systems ql-release))
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(url (archive-url ql-release))
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(local-archive (local-archive-file ql-release))
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(local-url (format nil "file://~a" (pathname local-archive)))
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(archive-data
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(progn
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(ensure-local-archive-file ql-release)
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;; Stuff this archive into the nix store. It was almost
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;; certainly going to end up there anyway (since it will
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;; probably be fetchurl'd for a nix package). Also, putting
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;; it into the store also gives us the SHA we need.
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(nix-prefetch-url local-url)))
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(ideal-md5 (archive-md5 ql-release))
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(raw-dependencies (coerce dependencies 'list))
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(name (string-downcase (format nil "~a" system)))
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(ql-sibling-names
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(remove name (mapcar 'name ql-sibling-systems)
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:test 'equal))
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(dependencies raw-dependencies)
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(description (asdf:system-description (asdf:find-system system)))
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(release-name (short-description ql-release)))
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(list
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:system system
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:description description
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:sha256 (getf archive-data :sha256)
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:url url
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:md5 ideal-md5
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:name name
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:dependencies dependencies
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:siblings ql-sibling-names
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:release-name release-name
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:parasites parasites)))
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(defvar *error-escape-valve* *error-output*
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"When `*error-output*' is rebound to inhibit spew, this stream will
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still produce output.")
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(defun print-usage-and-quit ()
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"Describe how to use this program... and then exit."
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(format *error-output* "Usage:
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~A [--cacheDir <dir>] [--silent] [--debug] [--help|-h] <system-name>
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Arguments:
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--cacheDir Store (and look for) compiled lisp files in the given directory
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--verbose Show compilation output
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--debug Enter the debugger when a fatal error is encountered
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--help Print usage and exit
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<system-name> The quicklisp system to examine
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" (or (uiop:argv0) "quicklisp-to-nix-system-info"))
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(uiop:quit 2))
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(defun main ()
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"Make it go."
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(let ((argv (uiop:command-line-arguments))
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cache-dir
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target-system
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verbose-p
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debug-p)
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(handler-bind
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((warning
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(lambda (w)
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(format *error-escape-valve* "~A~%" w)))
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(error
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(lambda (e)
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(if debug-p
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(invoke-debugger e)
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(progn
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(format *error-escape-valve* "~
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Failed to extract system info. Details are below. ~
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Run with --debug and/or --verbose for more info.
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~A~%" e)
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(uiop:quit 1))))))
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(loop :while argv :do
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(cond
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((equal "--cacheDir" (first argv))
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(pop argv)
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(unless argv
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(error "--cacheDir expects an argument"))
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(setf cache-dir (first argv))
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(pop argv))
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((equal "--verbose" (first argv))
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(setf verbose-p t)
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(pop argv))
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((equal "--debug" (first argv))
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(setf debug-p t)
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(pop argv))
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((or (equal "--help" (first argv))
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(equal "-h" (first argv)))
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(print-usage-and-quit))
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(t
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(setf target-system (pop argv))
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(when argv
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(error "Can only operate on one system")))))
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(unless target-system
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(print-usage-and-quit))
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(when cache-dir
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(setf cache-dir (pathname-as-directory (parse-namestring cache-dir))))
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(with-quicklisp (dir) (:cache-dir (or cache-dir :temp))
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(declare (ignore dir))
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(let (system-data)
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(let ((*error-output* (if verbose-p
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*error-output*
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(make-broadcast-stream)))
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(*standard-output* (if verbose-p
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*standard-output*
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(make-broadcast-stream)))
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(*trace-output* (if verbose-p
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*trace-output*
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(make-broadcast-stream))))
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(format *error-output*
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"quicklisp-to-nix-system-info ~A~%ASDF ~A~%Quicklisp ~A~%Compiler ~A ~A~%"
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*version*
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(asdf:asdf-version)
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(funcall (intern "CLIENT-VERSION" :ql))
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(lisp-implementation-type)
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(lisp-implementation-version))
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(setf system-data (system-data target-system)))
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(cond
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(system-data
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(format t "~W~%" system-data)
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(uiop:quit 0))
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(t
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(format *error-output* "Failed to determine system data~%")
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(uiop:quit 1))))))))
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(defun dump-image ()
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"Make an executable"
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(setf uiop:*image-entry-point* #'main)
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(setf uiop:*lisp-interaction* nil)
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(uiop:dump-image "quicklisp-to-nix-system-info" :executable t))
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