327 lines
11 KiB
Common Lisp
327 lines
11 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
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(:use :common-lisp :ql-to-nix-util :ql-to-nix-quicklisp-bootstrap))
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(in-package :ql-to-nix)
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;; We're going to pull in our dependencies at image dumping time in an
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;; isolated quicklisp installation. Unfortunately, that means that we
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;; can't yet access the symbols for our dependencies. We can probably
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;; do better (by, say, loading these dependencies before this file),
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;; but...
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(defvar *required-systems* nil)
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(push :cl-emb *required-systems*)
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(wrap :cl-emb register-emb)
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(wrap :cl-emb execute-emb)
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(push :external-program *required-systems*)
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(wrap :external-program run)
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(push :cl-ppcre *required-systems*)
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(wrap :cl-ppcre split)
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(wrap :cl-ppcre regex-replace-all)
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(wrap :cl-ppcre scan)
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(push :alexandria *required-systems*)
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(wrap :alexandria read-file-into-string)
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(wrap :alexandria write-string-into-file)
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(push :md5 *required-systems*)
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(wrap :md5 md5sum-file)
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(wrap :ql-dist find-system)
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(wrap :ql-dist release)
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(wrap :ql-dist provided-systems)
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(wrap :ql-dist archive-url)
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(wrap :ql-dist local-archive-file)
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(wrap :ql-dist ensure-local-archive-file)
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(wrap :ql-dist archive-md5)
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(wrap :ql-dist name)
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(wrap :ql-dist short-description)
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(defun escape-filename (s)
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(format
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nil "~a~{~a~}"
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(if (scan "^[a-zA-Z_]" s) "" "_")
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(loop
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for x in (map 'list 'identity s)
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collect
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(case x
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(#\/ "_slash_")
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(#\\ "_backslash_")
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(#\_ "__")
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(#\. "_dot_")
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(#\+ "_plus_")
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(t x)))))
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(defvar *system-info-bin*
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(let* ((path (uiop:getenv "system-info"))
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(path-dir (if (equal #\/ (aref path (1- (length path))))
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path
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(concatenate 'string path "/")))
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(pathname (parse-namestring path-dir)))
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(merge-pathnames #P"bin/quicklisp-to-nix-system-info" pathname))
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"The path to the quicklisp-to-nix-system-info binary.")
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(defvar *cache-dir* nil
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"The folder where fasls will be cached.")
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(defun raw-system-info (system-name)
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"Run quicklisp-to-nix-system-info on the given system and return the
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form produced by the program."
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(when *cache-dir*
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(let ((command `(,*system-info-bin* "--cacheDir" ,(namestring *cache-dir*) ,system-name)))
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(handler-case
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(return-from raw-system-info
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(read (make-string-input-stream (uiop:run-program command :output :string))))
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(error (e)
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;; Some systems don't like the funky caching that we're
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;; doing. That's okay. Let's try it uncached before we
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;; give up.
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(warn "Unable to use cache for system ~A.~%~A" system-name e)))))
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(read (make-string-input-stream (uiop:run-program `(,*system-info-bin* ,system-name) :output :string))))
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(defvar *system-data-memoization-path* nil
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"The path to the folder where fully-resolved system information can
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be cached.
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If information for a system is found in this directory, `system-data'
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will use it instead of re-computing the system data.")
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(defvar *system-data-in-memory-memoization*
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(make-hash-table :test #'equalp))
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(defun memoized-system-data-path (system)
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"Return the path to the file that (if it exists) contains
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pre-computed system data."
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(when *system-data-memoization-path*
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(merge-pathnames
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(make-pathname
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:name (escape-filename (string system))
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:type "txt") *system-data-memoization-path*)))
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(defun memoized-system-data (system)
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"Attempts to locate memoized system data in the path specified by
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`*system-data-memoization-path*'."
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(multiple-value-bind (value found) (gethash system *system-data-in-memory-memoization*)
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(when found
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(return-from memoized-system-data (values value found))))
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(let ((path (memoized-system-data-path system)))
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(unless path
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(return-from memoized-system-data (values nil nil)))
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(with-open-file (s path :if-does-not-exist nil :direction :input)
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(unless s
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(return-from memoized-system-data (values nil nil)))
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(return-from memoized-system-data (values (read s) t)))))
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(defun set-memoized-system-data (system data)
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"Store system data in the path specified by
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`*system-data-memoization-path*'."
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(setf (gethash system *system-data-in-memory-memoization*) data)
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(let ((path (memoized-system-data-path system)))
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(unless path
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(return-from set-memoized-system-data data))
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(with-open-file (s path :direction :output :if-exists :supersede)
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(format s "~W" data)))
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data)
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(defun system-data (system)
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"Examine a quicklisp system name and figure out everything that is
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required to produce a nix package.
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This function stores results for memoization purposes in files within
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`*system-data-memoization-path*'."
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(multiple-value-bind (value found) (memoized-system-data system)
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(when found
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(return-from system-data value)))
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(format t "Examining system ~A~%" system)
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(let* ((system-info (raw-system-info system))
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(host (getf system-info :host))
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(host-name (getf system-info :host-name))
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(name (getf system-info :name)))
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(when host
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(return-from system-data
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(set-memoized-system-data
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system
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(list
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:system (getf system-info :system)
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:host host
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:filename (escape-filename name)
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:host-filename (escape-filename host-name)))))
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(let* ((url (getf system-info :url))
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(sha256 (getf system-info :sha256))
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(archive-data (nix-prefetch-url url :expected-sha256 sha256))
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(archive-path (getf archive-data :path))
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(archive-md5 (string-downcase
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(format nil "~{~16,2,'0r~}"
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(map 'list 'identity (md5sum-file archive-path)))))
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(stated-md5 (getf system-info :md5))
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(dependencies (getf system-info :dependencies))
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(deps (mapcar (lambda (x) (list :name x :filename (escape-filename x)))
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dependencies))
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(description (getf system-info :description))
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(siblings (getf system-info :siblings))
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(release-name (getf system-info :release-name))
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(parasites (getf system-info :parasites))
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(version (regex-replace-all
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(format nil "~a-" name) release-name "")))
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(assert (equal archive-md5 stated-md5))
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(set-memoized-system-data
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system
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(list
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:system system
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:description description
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:sha256 sha256
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:url url
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:md5 stated-md5
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:name name
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:filename (escape-filename name)
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:deps deps
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:dependencies dependencies
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:version version
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:siblings siblings
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:parasites parasites)))))
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(defun parasitic-p (data)
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(getf data :host))
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(defvar *loaded-from* (or *compile-file-truename* *load-truename*)
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"Where this source file is located.")
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(defun this-file ()
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"Where this source file is located or an error."
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(or *loaded-from* (error "Not sure where this file is located!")))
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(defun nix-expression (system)
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(execute-emb
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"nix-package"
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:env (system-data system)))
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(defun nix-invocation (system)
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(let ((data (system-data system)))
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(if (parasitic-p data)
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(execute-emb
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"parasitic-invocation"
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:env data)
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(execute-emb
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"invocation"
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:env data))))
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(defun systems-closure (systems)
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(let*
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((seen (make-hash-table :test 'equal)))
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(loop
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with queue := systems
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with res := nil
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while queue
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for next := (pop queue)
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for old := (gethash next seen)
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for data := (unless old (system-data next))
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for deps := (getf data :dependencies)
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for siblings := (getf data :siblings)
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unless old do
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(progn
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(push next res)
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(setf queue (append queue deps)))
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do (setf (gethash next seen) t)
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finally (return res))))
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(defun ql-to-nix (target-directory)
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(let*
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((systems
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(split
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(format nil "~%")
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(read-file-into-string
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(format nil "~a/quicklisp-to-nix-systems.txt" target-directory))))
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(closure (systems-closure systems))
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(invocations
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(loop for s in closure
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collect (list :code (nix-invocation s)))))
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(loop
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for s in closure
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do (unless (parasitic-p (system-data s))
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(write-string-into-file
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(nix-expression s)
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(format nil "~a/quicklisp-to-nix-output/~a.nix"
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target-directory (escape-filename s))
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:if-exists :supersede)))
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(write-string-into-file
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(execute-emb
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"top-package"
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:env (list :invocations invocations))
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(format nil "~a/quicklisp-to-nix.nix" target-directory)
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:if-exists :supersede)))
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(defun print-usage-and-quit ()
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"Does what it says on the tin."
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(format *error-output* "Usage:
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~A [--help] [--cacheSystemInfoDir <path>] [--cacheFaslDir <path>] <work-dir>
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Arguments:
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--cacheSystemInfoDir Store computed system info in the given directory
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--cacheFaslDir Store intermediate fast load files in the given directory
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--help Print usage and exit
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<work-dir> Path to directory with quicklisp-to-nix-systems.txt
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" (uiop:argv0))
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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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work-directory
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cache-system-info-directory
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cache-fasl-directory)
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(loop :while argv :for arg = (pop argv) :do
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(cond
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((equal arg "--cacheSystemInfoDir")
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(unless argv
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(format *error-output* "--cacheSystemInfoDir requires an argument~%")
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(print-usage-and-quit))
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(setf cache-system-info-directory (pop argv)))
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((equal arg "--cacheFaslDir")
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(unless argv
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(format *error-output* "--cacheFaslDir requires an argument~%")
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(print-usage-and-quit))
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(setf cache-fasl-directory (pop argv)))
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((equal arg "--help")
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(print-usage-and-quit))
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(t
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(when argv
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(format *error-output* "Only one positional argument allowed~%")
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(print-usage-and-quit))
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(setf work-directory arg))))
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(when cache-system-info-directory
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(setf cache-system-info-directory (pathname-as-directory (pathname cache-system-info-directory)))
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(ensure-directories-exist cache-system-info-directory))
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(labels
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((make-go (*cache-dir*)
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(format t "Caching fasl files in ~A~%" *cache-dir*)
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(let ((*system-data-memoization-path* cache-system-info-directory))
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(ql-to-nix work-directory))))
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(if cache-fasl-directory
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(make-go (truename (pathname-as-directory (parse-namestring (ensure-directories-exist cache-fasl-directory)))))
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(with-temporary-directory (*cache-dir*)
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(make-go *cache-dir*))))))
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(defun dump-image ()
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"Make an executable"
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(dolist (system *required-systems*)
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(asdf:make system))
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(register-emb "nix-package" (merge-pathnames #p"nix-package.emb" (this-file)))
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(register-emb "invocation" (merge-pathnames #p"invocation.emb" (this-file)))
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(register-emb "parasitic-invocation" (merge-pathnames #p"parasitic-invocation.emb" (this-file)))
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(register-emb "top-package" (merge-pathnames #p"top-package.emb" (this-file)))
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(setf uiop:*image-entry-point* #'main)
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(setf uiop:*lisp-interaction* nil)
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(setf *loaded-from* nil) ;; Break the link to our source
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(uiop:dump-image "quicklisp-to-nix" :executable t))
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