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guix: opam: More flexibility in the importer. 

* guix/scripts/import/opam.scm: Pass all instances of --repo as a list
  to the importer.
* guix/import/opam.scm (opam-fetch): Stop expecting "expanded"
  repositories and call get-opam-repository instead to keep values
  "symbolic" as long as possible and factorize.
  (get-opam-repository): Use the same repository source as CLI opam does
  (i.e. HTTP-served index.tar.gz instead of git repositories).
  (find-latest-version): Be more flexible on the repositories structure
  instead of expecting packages/PACKAGE-NAME/PACKAGE-NAME.VERSION/.
* tests/opam.scm: Update the call to opam->guix-package since repo is
  now expected to be a list and remove the mocked get-opam-repository
  deprecated by the support for local folders by the actual
  implementation.
* doc/guix.texi: Document the new semantics and valid arguments for the
  --repo option.

Signed-off-by: Julien Lepiller <julien@lepiller.eu>
This commit is contained in:
Alice BRENON 2021-08-07 19:50:10 +02:00 committed by Julien Lepiller
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commit fc29c80b96
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29
doc/guix.texi
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@ -95,6 +95,7 @@ Copyright @copyright{} 2021 Raghav Gururajan@*
Copyright @copyright{} 2021 Domagoj Stolfa@*
Copyright @copyright{} 2021 Hui Lu@*
Copyright @copyright{} 2021 pukkamustard@*
Copyright @copyright{} 2021 Alice Brenon@*
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
@ -11659,14 +11660,30 @@ Traverse the dependency graph of the given upstream package recursively
and generate package expressions for all those packages that are not yet
in Guix.
@item --repo
Select the given repository (a repository name). Possible values include:
By default, packages are searched in the official OPAM repository. This
option, which can be used more than once, lets you add other repositories
which will be searched for packages. It accepts as valid arguments:
@itemize
@item @code{opam}, the default opam repository,
@item @code{coq} or @code{coq-released}, the stable repository for coq packages,
@item @code{coq-core-dev}, the repository that contains development versions of coq,
@item @code{coq-extra-dev}, the repository that contains development versions
of coq packages.
@item the name of a known repository - can be one of @code{opam},
@code{coq} (equivalent to @code{coq-released}),
@code{coq-core-dev}, @code{coq-extra-dev} or @code{grew}.
@item the URL of a repository as expected by the @code{opam repository
add} command (for instance, the URL equivalent of the above
@code{opam} name would be @uref{https://opam.ocaml.org}).
@item the path to a local copy of a repository (a directory containing a
@file{packages/} sub-directory).
@end itemize
Repositories are assumed to be passed to this option by order of
preference. The additional repositories will not replace the default
@code{opam} repository, which is always kept as a fallback.
Also, please note that versions are not compared accross repositories.
The first repository (from left to right) that has at least one version
of a given package will prevail over any others, and the version
imported will be the latest one found @emph{in this repository only}.
@end table
@item go

154
guix/import/opam.scm
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@ -2,6 +2,7 @@
;;; Copyright © 2018 Julien Lepiller <julien@lepiller.eu>
;;; Copyright © 2020 Martin Becze <mjbecze@riseup.net>
;;; Copyright © 2021 Xinglu Chen <public@yoctocell.xyz>
;;; Copyright © 2021 Alice Brenon <alice.brenon@ens-lyon.fr>
;;;
;;; This file is part of GNU Guix.
;;;
@ -22,21 +23,24 @@
#:use-module (ice-9 ftw)
#:use-module (ice-9 match)
#:use-module (ice-9 peg)
#:use-module ((ice-9 popen) #:select (open-pipe*))
#:use-module (ice-9 receive)
#:use-module ((ice-9 rdelim) #:select (read-line))
#:use-module (ice-9 textual-ports)
#:use-module (ice-9 vlist)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-2)
#:use-module (web uri)
#:use-module ((srfi srfi-26) #:select (cut))
#:use-module ((web uri) #:select (string->uri uri->string))
#:use-module ((guix build utils) #:select (dump-port find-files mkdir-p))
#:use-module (guix build-system)
#:use-module (guix build-system ocaml)
#:use-module (guix http-client)
#:use-module (guix git)
#:use-module (guix ui)
#:use-module (guix packages)
#:use-module (guix upstream)
#:use-module (guix utils)
#:use-module ((guix utils) #:select (cache-directory
version>?
call-with-temporary-output-file))
#:use-module (guix import utils)
#:use-module ((guix licenses) #:prefix license:)
#:export (opam->guix-package
@ -121,51 +125,83 @@
(define-peg-pattern condition-string all (and QUOTE (* STRCHR) QUOTE))
(define-peg-pattern condition-var all (+ (or (range #\a #\z) "-" ":")))
(define* (get-opam-repository #:optional repo)
(define (opam-cache-directory path)
(string-append (cache-directory) "/opam/" path))
(define known-repositories
'((opam . "https://opam.ocaml.org")
(coq . "https://coq.inria.fr/opam/released")
(coq-released . "https://coq.inria.fr/opam/released")
(coq-core-dev . "https://coq.inria.fr/opam/core-dev")
(coq-extra-dev . "https://coq.inria.fr/opam/extra-dev")
(grew . "http://opam.grew.fr")))
(define (get-uri repo-root)
(let ((archive-file (string-append repo-root "/index.tar.gz")))
(or (string->uri archive-file)
(begin
(warning (G_ "'~a' is not a valid URI~%") archive-file)
'bad-repo))))
(define (repo-type repo)
(match (assoc-ref known-repositories (string->symbol repo))
(#f (if (file-exists? repo)
`(local ,repo)
`(remote ,(get-uri repo))))
(url `(remote ,(get-uri url)))))
(define (update-repository input)
"Make sure the cache for opam repository INPUT is up-to-date"
(let* ((output (opam-cache-directory (basename (port-filename input))))
(cached-date (if (file-exists? output)
(stat:mtime (stat output))
(begin (mkdir-p output) 0))))
(when (> (stat:mtime (stat input)) cached-date)
(call-with-port
(open-pipe* OPEN_WRITE "tar" "xz" "-C" output "-f" "-")
(cut dump-port input <>)))
output))
(define* (get-opam-repository #:optional (repo "opam"))
"Update or fetch the latest version of the opam repository and return the
path to the repository."
(let ((url (cond
((or (not repo) (equal? repo 'opam))
"https://github.com/ocaml/opam-repository")
((string-prefix? "coq-" (symbol->string repo))
"https://github.com/coq/opam-coq-archive")
((equal? repo 'coq) "https://github.com/coq/opam-coq-archive")
(else (throw 'unknown-repository repo)))))
(receive (location commit _)
(update-cached-checkout url)
(cond
((or (not repo) (equal? repo 'opam))
location)
((equal? repo 'coq)
(string-append location "/released"))
((string-prefix? "coq-" (symbol->string repo))
(string-append location "/" (substring (symbol->string repo) 4)))
(else location)))))
(match (repo-type repo)
(('local p) p)
(('remote 'bad-repo) #f) ; to weed it out during filter-map in opam-fetch
(('remote r) (call-with-port (http-fetch/cached r) update-repository))))
;; Prevent Guile 3 from inlining this procedure so we can mock it in tests.
(set! get-opam-repository get-opam-repository)
(define (latest-version versions)
"Find the most recent version from a list of versions."
(fold (lambda (a b) (if (version>? a b) a b)) (car versions) versions))
(define (get-version-and-file path)
"Analyse a candidate path and return an list containing information for proper
version comparison as well as the source path for metadata."
(and-let* ((metadata-file (string-append path "/opam"))
(filename (basename path))
(version (string-join (cdr (string-split filename #\.)) ".")))
(and (file-exists? metadata-file)
(eq? 'regular (stat:type (stat metadata-file)))
(if (string-prefix? "v" version)
`(V ,(substring version 1) ,metadata-file)
`(digits ,version ,metadata-file)))))
(define (keep-max-version a b)
"Version comparison on the lists returned by the previous function taking the
janestreet re-versioning into account (v-prefixed come first)."
(match (cons a b)
((('V va _) . ('V vb _)) (if (version>? va vb) a b))
((('V _ _) . _) a)
((_ . ('V _ _)) b)
((('digits va _) . ('digits vb _)) (if (version>? va vb) a b))))
(define (find-latest-version package repository)
"Get the latest version of a package as described in the given repository."
(let* ((dir (string-append repository "/packages/" package))
(versions (scandir dir (lambda (name) (not (string-prefix? "." name))))))
(if versions
(let ((versions (map
(lambda (dir)
(string-join (cdr (string-split dir #\.)) "."))
versions)))
;; Workaround for janestreet re-versionning
(let ((v-versions (filter (lambda (version) (string-prefix? "v" version)) versions)))
(if (null? v-versions)
(latest-version versions)
(string-append "v" (latest-version (map (lambda (version) (substring version 1)) v-versions))))))
(begin
(format #t (G_ "Package not found in opam repository: ~a~%") package)
#f))))
(let ((packages (string-append repository "/packages"))
(filter (make-regexp (string-append "^" package "\\."))))
(reduce keep-max-version #f
(filter-map
get-version-and-file
(find-files packages filter #:directories? #t)))))
(define (get-metadata opam-file)
(with-input-from-file opam-file
@ -266,28 +302,30 @@ path to the repository."
(define (depends->native-inputs depends)
(filter (lambda (name) (not (equal? "" name)))
(map dependency->native-input depends)))
(map dependency->native-input depends)))
(define (dependency-list->inputs lst)
(map
(lambda (dependency)
(list dependency (list 'unquote (string->symbol dependency))))
(ocaml-names->guix-names lst)))
(lambda (dependency)
(list dependency (list 'unquote (string->symbol dependency))))
(ocaml-names->guix-names lst)))
(define* (opam-fetch name #:optional (repository (get-opam-repository)))
(and-let* ((repository repository)
(version (find-latest-version name repository))
(file (string-append repository "/packages/" name "/" name "." version "/opam")))
`(("metadata" ,@(get-metadata file))
("version" . ,(if (string-prefix? "v" version)
(substring version 1)
version)))))
(define* (opam-fetch name #:optional (repositories-specs '("opam")))
(or (fold (lambda (repository others)
(match (find-latest-version name repository)
((_ version file) `(("metadata" ,@(get-metadata file))
("version" . ,version)))
(_ others)))
#f
(filter-map get-opam-repository repositories-specs))
(leave (G_ "package '~a' not found~%") name)))
(define* (opam->guix-package name #:key (repo 'opam) version)
"Import OPAM package NAME from REPOSITORY (a directory name) or, if
REPOSITORY is #f, from the official OPAM repository. Return a 'package' sexp
(define* (opam->guix-package name #:key (repo '()) version)
"Import OPAM package NAME from REPOSITORIES (a list of names, URLs or local
paths, always including OPAM's official repository). Return a 'package' sexp
or #f on failure."
(and-let* ((opam-file (opam-fetch name (get-opam-repository repo)))
(and-let* ((with-opam (if (member "opam" repo) repo (cons "opam" repo)))
(opam-file (opam-fetch name with-opam))
(version (assoc-ref opam-file "version"))
(opam-content (assoc-ref opam-file "metadata"))
(url-dict (metadata-ref opam-content "url"))
@ -312,9 +350,7 @@ or #f on failure."
(values
`(package
(name ,(ocaml-name->guix-name name))
(version ,(if (string-prefix? "v" version)
(substring version 1)
version))
(version ,version)
(source
(origin
(method url-fetch)

8
guix/scripts/import/opam.scm
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@ -1,6 +1,7 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018 Julien Lepiller <julien@lepiller.eu>
;;; Copyright © 2021 Sarah Morgensen <iskarian@mgsn.dev>
;;; Copyright © 2021 Alice Brenon <alice.brenon@ens-lyon.fr>
;;;
;;; This file is part of GNU Guix.
;;;
@ -46,7 +47,8 @@ Import and convert the opam package for PACKAGE-NAME.\n"))
(display (G_ "
-r, --recursive import packages recursively"))
(display (G_ "
--repo import packages from this opam repository"))
--repo import packages from this opam repository (name, URL or local path)
can be used more than once"))
(display (G_ "
-V, --version display version information and exit"))
(newline)
@ -81,7 +83,9 @@ Import and convert the opam package for PACKAGE-NAME.\n"))
#:build-options? #f))
(let* ((opts (parse-options))
(repo (and=> (assoc-ref opts 'repo) string->symbol))
(repo (filter-map (match-lambda
(('repo . name) name)
(_ #f)) opts))
(args (filter-map (match-lambda
(('argument . value)
value)

68
tests/opam.scm
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@ -82,41 +82,39 @@ url {
(set! test-source-hash
(call-with-input-file file-name port-sha256))))
(_ (error "Unexpected URL: " url)))))
(mock ((guix import opam) get-opam-repository
(const test-repo))
(let ((my-package (string-append test-repo
"/packages/foo/foo.1.0.0")))
(mkdir-p my-package)
(with-output-to-file (string-append my-package "/opam")
(lambda _
(format #t "~a" test-opam-file))))
(match (opam->guix-package "foo" #:repo test-repo)
(('package
('name "ocaml-foo")
('version "1.0.0")
('source ('origin
('method 'url-fetch)
('uri "https://example.org/foo-1.0.0.tar.gz")
('sha256
('base32
(? string? hash)))))
('build-system 'ocaml-build-system)
('propagated-inputs
('quasiquote
(("ocaml-zarith" ('unquote 'ocaml-zarith)))))
('native-inputs
('quasiquote
(("ocaml-alcotest" ('unquote 'ocaml-alcotest))
("ocamlbuild" ('unquote 'ocamlbuild)))))
('home-page "https://example.org/")
('synopsis "Some example package")
('description "This package is just an example.")
('license 'license:bsd-3))
(string=? (bytevector->nix-base32-string
test-source-hash)
hash))
(x
(pk 'fail x #f))))))
(let ((my-package (string-append test-repo
"/packages/foo/foo.1.0.0")))
(mkdir-p my-package)
(with-output-to-file (string-append my-package "/opam")
(lambda _
(format #t "~a" test-opam-file))))
(match (opam->guix-package "foo" #:repo (list test-repo))
(('package
('name "ocaml-foo")
('version "1.0.0")
('source ('origin
('method 'url-fetch)
('uri "https://example.org/foo-1.0.0.tar.gz")
('sha256
('base32
(? string? hash)))))
('build-system 'ocaml-build-system)
('propagated-inputs
('quasiquote
(("ocaml-zarith" ('unquote 'ocaml-zarith)))))
('native-inputs
('quasiquote
(("ocaml-alcotest" ('unquote 'ocaml-alcotest))
("ocamlbuild" ('unquote 'ocamlbuild)))))
('home-page "https://example.org/")
('synopsis "Some example package")
('description "This package is just an example.")
('license 'license:bsd-3))
(string=? (bytevector->nix-base32-string
test-source-hash)
hash))
(x
(pk 'fail x #f)))))
;; Test the opam file parser
;; We fold over some test cases. Each case is a pair of the string to parse and the