650 lines
25 KiB
Scheme
650 lines
25 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2014 Cyril Roelandt <tipecaml@gmail.com>
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;;; Copyright © 2014 Eric Bavier <bavier@member.fsf.org>
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;;; Copyright © 2013, 2014, 2015 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 lint)
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#:use-module (guix store)
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#:use-module (guix base32)
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#:use-module (guix download)
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#:use-module (guix ftp-client)
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#:use-module (guix packages)
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#:use-module (guix records)
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#:use-module (guix ui)
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#:use-module (guix utils)
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#:use-module (guix gnu-maintenance)
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#:use-module (guix monads)
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#:use-module (gnu packages)
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#:use-module (ice-9 match)
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#:use-module (ice-9 regex)
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#:use-module (ice-9 format)
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#:use-module (web uri)
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#:use-module (srfi srfi-34)
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#:use-module (srfi srfi-35)
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#:use-module ((guix build download)
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#:select (maybe-expand-mirrors
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open-connection-for-uri))
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#:use-module (web request)
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#:use-module (web response)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-6) ;Unicode string ports
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#:use-module (srfi srfi-9)
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#:use-module (srfi srfi-11)
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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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#:export (guix-lint
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check-description-style
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check-inputs-should-be-native
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check-patch-file-names
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check-synopsis-style
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check-derivation
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check-home-page
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check-source))
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;;;
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;;; Helpers
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;;;
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(define* (emit-warning package message #:optional field)
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;; Emit a warning about PACKAGE, printing the location of FIELD if it is
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;; given, the location of PACKAGE otherwise, the full name of PACKAGE and the
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;; provided MESSAGE.
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(let ((loc (or (package-field-location package field)
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(package-location package))))
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(format (guix-warning-port) "~a: ~a: ~a~%"
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(location->string loc)
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(package-full-name package)
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message)))
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(define (call-with-accumulated-warnings thunk)
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"Call THUNK, accumulating any warnings in the current state, using the state
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monad."
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(let ((port (open-output-string)))
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(mlet %state-monad ((state (current-state))
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(result -> (parameterize ((guix-warning-port port))
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(thunk)))
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(warning -> (get-output-string port)))
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(mbegin %state-monad
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(munless (string=? "" warning)
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(set-current-state (cons warning state)))
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(return result)))))
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(define-syntax-rule (with-accumulated-warnings exp ...)
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"Evaluate EXP and accumulate warnings in the state monad."
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(call-with-accumulated-warnings
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(lambda ()
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exp ...)))
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;;;
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;;; Checkers
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;;;
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(define-record-type* <lint-checker>
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lint-checker make-lint-checker
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lint-checker?
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;; TODO: add a 'certainty' field that shows how confident we are in the
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;; checker. Then allow users to only run checkers that have a certain
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;; 'certainty' level.
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(name lint-checker-name)
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(description lint-checker-description)
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(check lint-checker-check))
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(define (list-checkers-and-exit)
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;; Print information about all available checkers and exit.
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(format #t (_ "Available checkers:~%"))
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(for-each (lambda (checker)
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(format #t "- ~a: ~a~%"
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(lint-checker-name checker)
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(_ (lint-checker-description checker))))
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%checkers)
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(exit 0))
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(define (properly-starts-sentence? s)
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(string-match "^[(\"'[:upper:][:digit:]]" s))
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(define (starts-with-abbreviation? s)
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"Return #t if S starts with what looks like an abbreviation or acronym."
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(string-match "^[A-Z][A-Z0-9]+\\>" s))
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(define (check-description-style package)
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;; Emit a warning if stylistic issues are found in the description of PACKAGE.
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(define (check-not-empty description)
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(when (string-null? description)
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(emit-warning package
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(_ "description should not be empty")
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'description)))
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(define (check-proper-start description)
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(unless (or (properly-starts-sentence? description)
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(string-prefix-ci? (package-name package) description))
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(emit-warning package
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(_ "description should start with an upper-case letter or digit")
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'description)))
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(define (check-end-of-sentence-space description)
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"Check that an end-of-sentence period is followed by two spaces."
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(let ((infractions
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(reverse (fold-matches
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"\\. [A-Z]" description '()
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(lambda (m r)
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;; Filter out matches of common abbreviations.
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(if (find (lambda (s)
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(string-suffix-ci? s (match:prefix m)))
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'("i.e" "e.g" "a.k.a" "resp"))
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r (cons (match:start m) r)))))))
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(unless (null? infractions)
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(emit-warning package
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(format #f (_ "sentences in description should be followed ~
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by two spaces; possible infraction~p at ~{~a~^, ~}")
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(length infractions)
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infractions)
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'description))))
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(let ((description (package-description package)))
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(when (string? description)
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(check-not-empty description)
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(check-proper-start description)
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(check-end-of-sentence-space description))))
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(define (check-inputs-should-be-native package)
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;; Emit a warning if some inputs of PACKAGE are likely to belong to its
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;; native inputs.
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(let ((inputs (package-inputs package)))
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(match inputs
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(((labels packages . _) ...)
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(when (member "pkg-config"
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(map package-name (filter package? packages)))
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(emit-warning package
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(_ "pkg-config should probably be a native input")
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'inputs))))))
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(define (package-name-regexp package)
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"Return a regexp that matches PACKAGE's name as a word at the beginning of a
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line."
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(make-regexp (string-append "^" (regexp-quote (package-name package))
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"\\>")
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regexp/icase))
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(define (check-synopsis-style package)
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;; Emit a warning if stylistic issues are found in the synopsis of PACKAGE.
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(define (check-not-empty synopsis)
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(when (string-null? synopsis)
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(emit-warning package
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(_ "synopsis should not be empty")
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'synopsis)))
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(define (check-final-period synopsis)
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;; Synopsis should not end with a period, except for some special cases.
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(when (and (string-suffix? "." synopsis)
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(not (string-suffix? "etc." synopsis)))
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(emit-warning package
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(_ "no period allowed at the end of the synopsis")
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'synopsis)))
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(define check-start-article
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;; Skip this check for GNU packages, as suggested by Karl Berry's reply to
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;; <http://lists.gnu.org/archive/html/bug-womb/2014-11/msg00000.html>.
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(if (false-if-exception (gnu-package? package))
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(const #t)
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(lambda (synopsis)
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(when (or (string-prefix-ci? "A " synopsis)
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(string-prefix-ci? "An " synopsis))
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(emit-warning package
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(_ "no article allowed at the beginning of \
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the synopsis")
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'synopsis)))))
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(define (check-synopsis-length synopsis)
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(when (>= (string-length synopsis) 80)
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(emit-warning package
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(_ "synopsis should be less than 80 characters long")
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'synopsis)))
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(define (check-proper-start synopsis)
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(unless (properly-starts-sentence? synopsis)
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(emit-warning package
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(_ "synopsis should start with an upper-case letter or digit")
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'synopsis)))
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(define (check-start-with-package-name synopsis)
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(when (and (regexp-exec (package-name-regexp package) synopsis)
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(not (starts-with-abbreviation? synopsis)))
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(emit-warning package
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(_ "synopsis should not start with the package name")
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'synopsis)))
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(let ((synopsis (package-synopsis package)))
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(when (string? synopsis)
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(check-not-empty synopsis)
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(check-proper-start synopsis)
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(check-final-period synopsis)
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(check-start-article synopsis)
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(check-start-with-package-name synopsis)
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(check-synopsis-length synopsis))))
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(define (probe-uri uri)
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"Probe URI, a URI object, and return two values: a symbol denoting the
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probing status, such as 'http-response' when we managed to get an HTTP
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response from URI, and additional details, such as the actual HTTP response."
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(define headers
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'((User-Agent . "GNU Guile")
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(Accept . "*/*")))
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(let loop ((uri uri)
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(visited '()))
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(match (uri-scheme uri)
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((or 'http 'https)
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(catch #t
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(lambda ()
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(let ((port (open-connection-for-uri uri))
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(request (build-request uri #:headers headers)))
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(define response
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(dynamic-wind
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(const #f)
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(lambda ()
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(write-request request port)
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(force-output port)
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(read-response port))
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(lambda ()
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(close port))))
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(case (response-code response)
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((301 302 307)
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(let ((location (response-location response)))
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(if (or (not location) (member location visited))
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(values 'http-response response)
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(loop location (cons location visited))))) ;follow the redirect
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(else
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(values 'http-response response)))))
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(lambda (key . args)
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(case key
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((bad-header bad-header-component)
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;; This can happen if the server returns an invalid HTTP header,
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;; as is the case with the 'Date' header at sqlite.org.
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(values 'invalid-http-response #f))
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((getaddrinfo-error system-error gnutls-error)
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(values key args))
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(else
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(apply throw key args))))))
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('ftp
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(catch #t
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(lambda ()
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(let ((conn (ftp-open (uri-host uri) 21)))
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(define response
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(dynamic-wind
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(const #f)
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(lambda ()
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(ftp-chdir conn (dirname (uri-path uri)))
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(ftp-size conn (basename (uri-path uri))))
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(lambda ()
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(ftp-close conn))))
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(values 'ftp-response '(ok))))
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(lambda (key . args)
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(case key
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((ftp-error)
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(values 'ftp-response `(error ,@args)))
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((getaddrinfo-error system-error gnutls-error)
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(values key args))
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(else
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(apply throw key args))))))
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(_
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(values 'unknown-protocol #f)))))
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(define (validate-uri uri package field)
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"Return #t if the given URI can be reached, otherwise return #f and emit a
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warning for PACKAGE mentionning the FIELD."
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(let-values (((status argument)
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(probe-uri uri)))
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(case status
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((http-response)
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(or (= 200 (response-code argument))
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(begin
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(emit-warning package
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(format #f
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(_ "URI ~a not reachable: ~a (~s)")
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(uri->string uri)
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(response-code argument)
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(response-reason-phrase argument))
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field)
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#f)))
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((ftp-response)
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(match argument
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(('ok) #t)
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(('error port command code message)
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(emit-warning package
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(format #f
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(_ "URI ~a not reachable: ~a (~s)")
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(uri->string uri)
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code (string-trim-both message)))
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#f)))
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((getaddrinfo-error)
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(emit-warning package
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(format #f
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(_ "URI ~a domain not found: ~a")
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(uri->string uri)
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(gai-strerror (car argument)))
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field)
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#f)
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((system-error)
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(emit-warning package
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(format #f
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(_ "URI ~a unreachable: ~a")
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(uri->string uri)
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(strerror
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(system-error-errno
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(cons status argument))))
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field)
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#f)
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((invalid-http-response gnutls-error)
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;; Probably a misbehaving server; ignore.
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#f)
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((unknown-protocol) ;nothing we can do
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#f)
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(else
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(error "internal linter error" status)))))
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(define (check-home-page package)
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"Emit a warning if PACKAGE has an invalid 'home-page' field, or if that
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'home-page' is not reachable."
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(let ((uri (and=> (package-home-page package) string->uri)))
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(cond
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((uri? uri)
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(validate-uri uri package 'home-page))
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((not (package-home-page package))
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(unless (or (string-contains (package-name package) "bootstrap")
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(string=? (package-name package) "ld-wrapper"))
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(emit-warning package
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(_ "invalid value for home page")
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'home-page)))
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(else
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(emit-warning package (format #f (_ "invalid home page URL: ~s")
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(package-home-page package))
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'home-page)))))
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(define (check-patch-file-names package)
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"Emit a warning if the patches requires by PACKAGE are badly named or if the
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patch could not be found."
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(guard (c ((message-condition? c) ;raised by 'search-patch'
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(emit-warning package (condition-message c)
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'patch-file-names)))
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(let ((patches (and=> (package-source package) origin-patches))
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(name (package-name package))
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(full-name (package-full-name package)))
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(when (and patches
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(any (match-lambda
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((? string? patch)
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(let ((file (basename patch)))
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(not (or (eq? (string-contains file name) 0)
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(eq? (string-contains file full-name)
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0)))))
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(_
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;; This must be an <origin> or something like that.
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#f))
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patches))
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(emit-warning package
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(_ "file names of patches should start with \
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the package name")
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'patch-file-names)))))
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(define (escape-quotes str)
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"Replace any quote character in STR by an escaped quote character."
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(list->string
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(string-fold-right (lambda (chr result)
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(match chr
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(#\" (cons* #\\ #\"result))
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(_ (cons chr result))))
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'()
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str)))
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(define official-gnu-packages*
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(memoize
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(lambda ()
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"A memoizing version of 'official-gnu-packages' that returns the empty
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list when something goes wrong, such as a networking issue."
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(let ((gnus (false-if-exception (official-gnu-packages))))
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(or gnus '())))))
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(define (check-gnu-synopsis+description package)
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"Make sure that, if PACKAGE is a GNU package, it uses the synopsis and
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descriptions maintained upstream."
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(match (find (lambda (descriptor)
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(string=? (gnu-package-name descriptor)
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(package-name package)))
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(official-gnu-packages*))
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(#f ;not a GNU package, so nothing to do
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#t)
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(descriptor ;a genuine GNU package
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(let ((upstream (gnu-package-doc-summary descriptor))
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(downstream (package-synopsis package))
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(loc (or (package-field-location package 'synopsis)
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(package-location package))))
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(unless (and upstream (string=? upstream downstream))
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(format (guix-warning-port)
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(_ "~a: ~a: proposed synopsis: ~s~%")
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(location->string loc) (package-full-name package)
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upstream)))
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(let ((upstream (gnu-package-doc-description descriptor))
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(downstream (package-description package))
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(loc (or (package-field-location package 'description)
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(package-location package))))
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(when (and upstream
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(not (string=? (fill-paragraph upstream 100)
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(fill-paragraph downstream 100))))
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(format (guix-warning-port)
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(_ "~a: ~a: proposed description:~% \"~a\"~%")
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(location->string loc) (package-full-name package)
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(fill-paragraph (escape-quotes upstream) 77 7)))))))
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(define (check-source package)
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"Emit a warning if PACKAGE has an invalid 'source' field, or if that
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'source' is not reachable."
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(define (try-uris uris)
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(run-with-state
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(anym %state-monad
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(lambda (uri)
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(with-accumulated-warnings
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(validate-uri uri package 'source)))
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(append-map (cut maybe-expand-mirrors <> %mirrors)
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uris))
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'()))
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(let ((origin (package-source package)))
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(when (and origin
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(eqv? (origin-method origin) url-fetch))
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(let* ((strings (origin-uri origin))
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(uris (if (list? strings)
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(map string->uri strings)
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(list (string->uri strings)))))
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;; Just make sure that at least one of the URIs is valid.
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(call-with-values
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(lambda () (try-uris uris))
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(lambda (success? warnings)
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;; When everything fails, report all of WARNINGS, otherwise don't
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;; report anything.
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;;
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;; XXX: Ideally we'd still allow warnings to be raised if *some*
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;; URIs are unreachable, but distinguish that from the error case
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;; where *all* the URIs are unreachable.
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(unless success?
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(emit-warning package
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(_ "all the source URIs are unreachable:")
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'source)
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(for-each (lambda (warning)
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(display warning (guix-warning-port)))
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(reverse warnings)))))))))
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(define (check-derivation package)
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"Emit a warning if we fail to compile PACKAGE to a derivation."
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(catch #t
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(lambda ()
|
||
(guard (c ((nix-protocol-error? c)
|
||
(emit-warning package
|
||
(format #f (_ "failed to create derivation: ~a")
|
||
(nix-protocol-error-message c))))
|
||
((message-condition? c)
|
||
(emit-warning package
|
||
(format #f (_ "failed to create derivation: ~a")
|
||
(condition-message c)))))
|
||
(with-store store
|
||
(package-derivation store package))))
|
||
(lambda args
|
||
(emit-warning package
|
||
(format #f (_ "failed to create derivation: ~s~%")
|
||
args)))))
|
||
|
||
|
||
|
||
;;;
|
||
;;; List of checkers.
|
||
;;;
|
||
|
||
(define %checkers
|
||
(list
|
||
(lint-checker
|
||
(name 'description)
|
||
(description "Validate package descriptions")
|
||
(check check-description-style))
|
||
(lint-checker
|
||
(name 'gnu-description)
|
||
(description "Validate synopsis & description of GNU packages")
|
||
(check check-gnu-synopsis+description))
|
||
(lint-checker
|
||
(name 'inputs-should-be-native)
|
||
(description "Identify inputs that should be native inputs")
|
||
(check check-inputs-should-be-native))
|
||
(lint-checker
|
||
(name 'patch-file-names)
|
||
(description "Validate file names and availability of patches")
|
||
(check check-patch-file-names))
|
||
(lint-checker
|
||
(name 'home-page)
|
||
(description "Validate home-page URLs")
|
||
(check check-home-page))
|
||
(lint-checker
|
||
(name 'source)
|
||
(description "Validate source URLs")
|
||
(check check-source))
|
||
(lint-checker
|
||
(name 'derivation)
|
||
(description "Report failure to compile a package to a derivation")
|
||
(check check-derivation))
|
||
(lint-checker
|
||
(name 'synopsis)
|
||
(description "Validate package synopses")
|
||
(check check-synopsis-style))))
|
||
|
||
(define (run-checkers package checkers)
|
||
;; Run the given CHECKERS on PACKAGE.
|
||
(let ((tty? (isatty? (current-error-port)))
|
||
(name (package-full-name package)))
|
||
(for-each (lambda (checker)
|
||
(when tty?
|
||
(format (current-error-port) "checking ~a [~a]...\r"
|
||
name (lint-checker-name checker))
|
||
(force-output (current-error-port)))
|
||
((lint-checker-check checker) package))
|
||
checkers)))
|
||
|
||
|
||
;;;
|
||
;;; Command-line options.
|
||
;;;
|
||
|
||
(define %default-options
|
||
;; Alist of default option values.
|
||
'())
|
||
|
||
(define (show-help)
|
||
(display (_ "Usage: guix lint [OPTION]... [PACKAGE]...
|
||
Run a set of checkers on the specified package; if none is specified, run the checkers on all packages.\n"))
|
||
(display (_ "
|
||
-c, --checkers=CHECKER1,CHECKER2...
|
||
only run the specificed checkers"))
|
||
(display (_ "
|
||
-h, --help display this help and exit"))
|
||
(display (_ "
|
||
-l, --list-checkers display the list of available lint checkers"))
|
||
(display (_ "
|
||
-V, --version display version information and exit"))
|
||
(newline)
|
||
(show-bug-report-information))
|
||
|
||
|
||
(define %options
|
||
;; Specification of the command-line options.
|
||
;; TODO: add some options:
|
||
;; * --certainty=[low,medium,high]: only run checkers that have at least this
|
||
;; 'certainty'.
|
||
(list (option '(#\c "checkers") #t #f
|
||
(lambda (opt name arg result)
|
||
(let ((names (map string->symbol (string-split arg #\,))))
|
||
(for-each (lambda (c)
|
||
(unless (memq c
|
||
(map lint-checker-name
|
||
%checkers))
|
||
(leave (_ "~a: invalid checker~%") c)))
|
||
names)
|
||
(alist-cons 'checkers
|
||
(filter (lambda (checker)
|
||
(member (lint-checker-name checker)
|
||
names))
|
||
%checkers)
|
||
result))))
|
||
(option '(#\h "help") #f #f
|
||
(lambda args
|
||
(show-help)
|
||
(exit 0)))
|
||
(option '(#\l "list-checkers") #f #f
|
||
(lambda args
|
||
(list-checkers-and-exit)))
|
||
(option '(#\V "version") #f #f
|
||
(lambda args
|
||
(show-version-and-exit "guix lint")))))
|
||
|
||
|
||
;;;
|
||
;;; Entry Point
|
||
;;;
|
||
|
||
(define (guix-lint . args)
|
||
(define (parse-options)
|
||
;; Return the alist of option values.
|
||
(args-fold* args %options
|
||
(lambda (opt name arg result)
|
||
(leave (_ "~A: unrecognized option~%") name))
|
||
(lambda (arg result)
|
||
(alist-cons 'argument arg result))
|
||
%default-options))
|
||
|
||
(let* ((opts (parse-options))
|
||
(args (filter-map (match-lambda
|
||
(('argument . value)
|
||
value)
|
||
(_ #f))
|
||
(reverse opts)))
|
||
(checkers (or (assoc-ref opts 'checkers) %checkers)))
|
||
(if (null? args)
|
||
(fold-packages (lambda (p r) (run-checkers p checkers)) '())
|
||
(for-each (lambda (spec)
|
||
(run-checkers (specification->package spec) checkers))
|
||
args))))
|