468 lines
16 KiB
Scheme
468 lines
16 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2015, 2016 Ludovic Courtès <ludo@gnu.org>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (guix scripts graph)
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#:use-module (guix ui)
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#:use-module (guix graph)
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#:use-module (guix grafts)
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#:use-module (guix scripts)
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#:use-module (guix combinators)
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#:use-module (guix packages)
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#:use-module (guix monads)
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#:use-module (guix store)
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#:use-module (guix gexp)
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#:use-module (guix derivations)
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#:use-module ((guix build-system gnu) #:select (standard-packages))
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#:use-module (gnu packages)
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#:use-module (guix sets)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-26)
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#:use-module (srfi srfi-34)
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#:use-module (srfi srfi-35)
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#:use-module (srfi srfi-37)
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#:use-module (ice-9 match)
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#:export (%package-node-type
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%bag-node-type
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%bag-with-origins-node-type
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%bag-emerged-node-type
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%derivation-node-type
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%reference-node-type
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%referrer-node-type
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%node-types
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guix-graph))
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;;;
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;;; Package DAG.
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;;;
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(define (node-full-name thing)
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"Return a human-readable name to denote THING, a package, origin, or file
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name."
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(cond ((package? thing)
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(package-full-name thing))
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((origin? thing)
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(origin-actual-file-name thing))
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((string? thing) ;file name
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(or (basename thing)
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(error "basename" thing)))
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(else
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(number->string (object-address thing) 16))))
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(define (package-node-edges package)
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"Return the list of dependencies of PACKAGE."
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(match (package-direct-inputs package)
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(((labels packages . outputs) ...)
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;; Filter out origins and other non-package dependencies.
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(filter package? packages))))
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(define assert-package
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(match-lambda
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((? package? package)
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package)
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(x
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(raise
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(condition
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(&message
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(message (format #f (_ "~a: invalid argument (package name expected)")
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x))))))))
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(define nodes-from-package
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;; The default conversion method.
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(lift1 (compose list assert-package) %store-monad))
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(define %package-node-type
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;; Type for the traversal of package nodes.
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(node-type
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(name "package")
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(description "the DAG of packages, excluding implicit inputs")
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(convert nodes-from-package)
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;; We use package addresses as unique identifiers. This generally works
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;; well, but for generated package objects, we could end up with two
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;; packages that are not 'eq?', yet map to the same derivation (XXX).
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(identifier (lift1 object-address %store-monad))
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(label node-full-name)
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(edges (lift1 package-node-edges %store-monad))))
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;;;
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;;; Package DAG using bags.
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;;;
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(define (bag-node-identifier thing)
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"Return a unique identifier for THING, which may be a package, origin, or a
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file name."
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;; If THING is a file name (a string), we just return it; if it's a package
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;; or origin, we return its address. That gives us the object graph, but
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;; that may differ from the derivation graph (for instance,
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;; 'package-with-bootstrap-guile' generates fresh package objects, and
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;; several packages that are not 'eq?' may actually map to the same
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;; derivation.) Thus, we lower THING and use its derivation file name as a
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;; unique identifier.
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(with-monad %store-monad
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(if (string? thing)
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(return thing)
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(mlet %store-monad ((low (lower-object thing)))
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(return (if (derivation? low)
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(derivation-file-name low)
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low))))))
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(define (bag-node-edges thing)
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"Return the list of dependencies of THING, a package or origin.
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Dependencies may include packages, origin, and file names."
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(cond ((package? thing)
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(match (bag-direct-inputs (package->bag thing))
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(((labels things . outputs) ...)
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things)))
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((origin? thing)
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(cons (or (origin-patch-guile thing) (default-guile))
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(if (or (pair? (origin-patches thing))
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(origin-snippet thing))
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(match (origin-patch-inputs thing)
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(#f '())
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(((labels dependencies _ ...) ...)
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(delete-duplicates dependencies eq?)))
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'())))
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(else
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'())))
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(define %bag-node-type
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;; Type for the traversal of package nodes via the "bag" representation,
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;; which includes implicit inputs.
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(node-type
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(name "bag")
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(description "the DAG of packages, including implicit inputs")
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(convert nodes-from-package)
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(identifier bag-node-identifier)
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(label node-full-name)
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(edges (lift1 (compose (cut filter package? <>) bag-node-edges)
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%store-monad))))
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(define %bag-with-origins-node-type
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(node-type
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(name "bag-with-origins")
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(description "the DAG of packages and origins, including implicit inputs")
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(convert nodes-from-package)
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(identifier bag-node-identifier)
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(label node-full-name)
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(edges (lift1 (lambda (thing)
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(filter (match-lambda
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((? package?) #t)
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((? origin?) #t)
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(_ #f))
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(bag-node-edges thing)))
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%store-monad))))
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(define standard-package-set
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(memoize
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(lambda ()
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"Return the set of standard packages provided by GNU-BUILD-SYSTEM."
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(match (standard-packages)
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(((labels packages . output) ...)
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(list->setq packages))))))
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(define (bag-node-edges-sans-bootstrap thing)
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"Like 'bag-node-edges', but pretend that the standard packages of
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GNU-BUILD-SYSTEM have zero dependencies."
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(if (set-contains? (standard-package-set) thing)
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'()
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(bag-node-edges thing)))
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(define %bag-emerged-node-type
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;; Like %BAG-NODE-TYPE, but without the bootstrap subset of the DAG.
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(node-type
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(name "bag-emerged")
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(description "same as 'bag', but without the bootstrap nodes")
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(convert nodes-from-package)
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(identifier bag-node-identifier)
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(label node-full-name)
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(edges (lift1 (compose (cut filter package? <>)
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bag-node-edges-sans-bootstrap)
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%store-monad))))
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;;;
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;;; Derivation DAG.
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;;;
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(define (file->derivation file)
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"Read the derivation from FILE and return it."
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(call-with-input-file file read-derivation))
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(define (derivation-dependencies obj)
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"Return the <derivation> objects and store items corresponding to the
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dependencies of OBJ, a <derivation> or store item."
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(if (derivation? obj)
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(append (map (compose file->derivation derivation-input-path)
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(derivation-inputs obj))
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(derivation-sources obj))
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'()))
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(define (derivation-node-identifier node)
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"Return a unique identifier for NODE, which may be either a <derivation> or
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a plain store file."
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(if (derivation? node)
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(derivation-file-name node)
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node))
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(define (derivation-node-label node)
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"Return a label for NODE, a <derivation> object or plain store item."
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(store-path-package-name (match node
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((? derivation? drv)
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(derivation-file-name drv))
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((? string? file)
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file))))
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(define %derivation-node-type
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;; DAG of derivations. Very accurate, very detailed, but usually too much
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;; detailed.
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(node-type
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(name "derivation")
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(description "the DAG of derivations")
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(convert (match-lambda
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((? package? package)
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(with-monad %store-monad
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(>>= (package->derivation package)
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(lift1 list %store-monad))))
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((? derivation-path? item)
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(mbegin %store-monad
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((store-lift add-temp-root) item)
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(return (list (file->derivation item)))))
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(x
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(raise
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(condition (&message (message "unsupported argument for \
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derivation graph")))))))
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(identifier (lift1 derivation-node-identifier %store-monad))
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(label derivation-node-label)
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(edges (lift1 derivation-dependencies %store-monad))))
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;;;
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;;; DAG of residual references (aka. run-time dependencies).
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;;;
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(define ensure-store-items
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;; Return a list of store items as a monadic value based on the given
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;; argument, which may be a store item or a package.
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(match-lambda
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((? package? package)
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;; Return the output file names of PACKAGE.
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(mlet %store-monad ((drv (package->derivation package)))
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(return (match (derivation->output-paths drv)
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(((_ . file-names) ...)
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file-names)))))
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((? store-path? item)
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(with-monad %store-monad
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(return (list item))))
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(x
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(raise
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(condition (&message (message "unsupported argument for \
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this type of graph")))))))
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(define (references* item)
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"Return as a monadic value the references of ITEM, based either on the
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information available in the local store or using information about
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substitutes."
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(lambda (store)
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(guard (c ((nix-protocol-error? c)
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(match (substitutable-path-info store (list item))
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((info)
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(values (substitutable-references info) store))
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(()
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(leave (_ "references for '~a' are not known~%")
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item)))))
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(values (references store item) store))))
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(define %reference-node-type
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(node-type
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(name "references")
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(description "the DAG of run-time dependencies (store references)")
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(convert ensure-store-items)
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(identifier (lift1 identity %store-monad))
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(label store-path-package-name)
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(edges references*)))
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(define non-derivation-referrers
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(let ((referrers (store-lift referrers)))
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(lambda (item)
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"Return the referrers of ITEM, except '.drv' files."
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(mlet %store-monad ((items (referrers item)))
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(return (remove derivation-path? items))))))
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(define %referrer-node-type
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(node-type
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(name "referrers")
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(description "the DAG of referrers in the store")
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(convert ensure-store-items)
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(identifier (lift1 identity %store-monad))
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(label store-path-package-name)
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(edges non-derivation-referrers)))
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;;;
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;;; List of node types.
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;;;
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(define %node-types
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;; List of all the node types.
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(list %package-node-type
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%bag-node-type
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%bag-with-origins-node-type
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%bag-emerged-node-type
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%derivation-node-type
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%reference-node-type
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%referrer-node-type))
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(define (lookup-node-type name)
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"Return the node type called NAME. Raise an error if it is not found."
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(or (find (lambda (type)
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(string=? (node-type-name type) name))
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%node-types)
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(leave (_ "~a: unknown node type~%") name)))
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(define (lookup-backend name)
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"Return the graph backend called NAME. Raise an error if it is not found."
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(or (find (lambda (backend)
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(string=? (graph-backend-name backend) name))
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%graph-backends)
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(leave (_ "~a: unknown backend~%") name)))
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(define (list-node-types)
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"Print the available node types along with their synopsis."
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(display (_ "The available node types are:\n"))
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(newline)
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(for-each (lambda (type)
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(format #t " - ~a: ~a~%"
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(node-type-name type)
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(node-type-description type)))
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%node-types))
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(define (list-backends)
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"Print the available backends along with their synopsis."
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(display (_ "The available backend types are:\n"))
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(newline)
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(for-each (lambda (backend)
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(format #t " - ~a: ~a~%"
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(graph-backend-name backend)
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(graph-backend-description backend)))
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%graph-backends))
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;;;
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;;; Command-line options.
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;;;
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(define %options
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(list (option '(#\t "type") #t #f
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(lambda (opt name arg result)
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(alist-cons 'node-type (lookup-node-type arg)
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result)))
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(option '("list-types") #f #f
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(lambda (opt name arg result)
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(list-node-types)
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(exit 0)))
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(option '(#\b "backend") #t #f
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(lambda (opt name arg result)
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(alist-cons 'backend (lookup-backend arg)
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result)))
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(option '("list-backends") #f #f
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(lambda (opt name arg result)
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(list-backends)
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(exit 0)))
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(option '(#\e "expression") #t #f
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(lambda (opt name arg result)
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(alist-cons 'expression arg result)))
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(option '(#\h "help") #f #f
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(lambda args
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(show-help)
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(exit 0)))
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(option '(#\V "version") #f #f
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(lambda args
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(show-version-and-exit "guix edit")))))
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(define (show-help)
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;; TRANSLATORS: Here 'dot' is the name of a program; it must not be
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;; translated.
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(display (_ "Usage: guix graph PACKAGE...
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Emit a Graphviz (dot) representation of the dependencies of PACKAGE...\n"))
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(display (_ "
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-b, --backend=TYPE produce a graph with the given backend TYPE"))
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(display (_ "
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--list-backends list the available graph backends"))
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(display (_ "
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-t, --type=TYPE represent nodes of the given TYPE"))
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(display (_ "
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--list-types list the available graph types"))
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(display (_ "
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-e, --expression=EXPR consider the package EXPR evaluates to"))
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(newline)
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(display (_ "
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-h, --help display this help and exit"))
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(display (_ "
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-V, --version display version information and exit"))
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(newline)
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(show-bug-report-information))
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(define %default-options
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`((node-type . ,%package-node-type)
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(backend . ,%graphviz-backend)))
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;;;
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;;; Entry point.
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;;;
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(define (guix-graph . args)
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(with-error-handling
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(let* ((opts (args-fold* args %options
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(lambda (opt name arg . rest)
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(leave (_ "~A: unrecognized option~%") name))
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(lambda (arg result)
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(alist-cons 'argument arg result))
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%default-options))
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(backend (assoc-ref opts 'backend))
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(type (assoc-ref opts 'node-type))
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(items (filter-map (match-lambda
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(('argument . (? store-path? item))
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item)
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(('argument . spec)
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(specification->package spec))
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(('expression . exp)
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(read/eval-package-expression exp))
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(_ #f))
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opts)))
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(with-store store
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;; Ask for absolute file names so that .drv file names passed from the
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;; user to 'read-derivation' are absolute when it returns.
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(with-fluids ((%file-port-name-canonicalization 'absolute))
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(run-with-store store
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;; XXX: Since grafting can trigger unsolicited builds, disable it.
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(mlet %store-monad ((_ (set-grafting #f))
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(nodes (mapm %store-monad
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(node-type-convert type)
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items)))
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(export-graph (concatenate nodes)
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(current-output-port)
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#:node-type type
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#:backend backend)))))))
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#t)
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;;; graph.scm ends here
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