From: Federico Beffa <beffa@ieee.org>
To: "Ludovic Courtès" <ludo@gnu.org>
Cc: Guix-devel <guix-devel@gnu.org>, Alex Kost <alezost@gmail.com>
Subject: Re: [PATCH 1/5] import: Add 'elpa' importer
Date: Thu, 25 Jun 2015 20:33:05 +0200 [thread overview]
Message-ID: <CAKrPhPN01_TRbqqjyJAEAPATSuUcwJwLDKmYDsGXOodn7LZ--g@mail.gmail.com> (raw)
In-Reply-To: <87381gvmsc.fsf@gnu.org>
[-- Attachment #1: Type: text/plain, Size: 2233 bytes --]
Thanks for the review!
I've made the suggested changes, except for the comments below.
On Wed, Jun 24, 2015 at 11:06 PM, Ludovic Courtès <ludo@gnu.org> wrote:
> Federico Beffa <beffa@ieee.org> skribis:
>> +Specific command-line options are:
>> +
>> +@table @code
>> +@item --archive=@var{repo}
>> +@itemx -a @var{repo}
>> +@var{repo} identifies the archive repository from which to retrieve the
>> +information. Currently the supported repositories and their identifiers
>> +are:
>> +@itemize -
>> +@item
>> +@uref{"http://elpa.gnu.org/packages", GNU}, selected by the @code{gnu}
>> +identifier. This is the default.
>> +
>> +@item
>> +@uref{"http://stable.melpa.org/packages", MELPA-Stable}, selected by the
>> +@code{melpa-stable} identifier.
>> +
>> +@item
>> +@uref{"http://melpa.org/packages", MELPA}, selected by the @code{melpa}
>> +identifier.
>> +@end itemize
>
> Perhaps REPO could also be a URL, in addition to one of these identifiers?
Yeah, perhaps later.
>> +;; Fetch URL, store the content in a temporary file and call PROC with that
>> +;; file.
>> +(define fetch-and-call-with-input-file
>> + (memoize
>> + (lambda* (url proc #:optional (err-msg "unavailable"))
>> + (call-with-temporary-output-file
>> + (lambda (temp port)
>> + (or (and (url-fetch url temp)
>> + (call-with-input-file temp proc))
>> + err-msg))))))
>
> Make the comment a docstring below ‘lambda*’.
>
> I would call it ‘call-with-downloaded-file’ for instance. But then
> memoization should be moved elsewhere, because that’s not one would
> expect from a procedure with this name.
I've deleted memoization because it's not really helping in any way
here. It was helpful for experimenting in the REPL...
>> +(define (package-home-page alist)
>> + "Extract the package home-page from ALIST."
>> + (or (lookup-extra alist ':url) "unspecified"))
>
> Maybe use the ‘elpa-package’ prefix instead of ‘package’ for procedures
> like this one that expect an ELPA-package-as-an-alist?
'elpa-package-home-page' is already taken by a field accessor of the
record <elpa-package>. So, I've left it alone.
Thanks,
Fede
[-- Attachment #2: 0001-import-Add-elpa-importer.patch --]
[-- Type: text/x-diff, Size: 20212 bytes --]
From 4d67233593a16bd2d213304202a3c2e87aed7797 Mon Sep 17 00:00:00 2001
From: Federico Beffa <beffa@fbengineering.ch>
Date: Tue, 16 Jun 2015 10:50:06 +0200
Subject: [PATCH 1/5] import: Add 'elpa' importer.
* guix/import/elpa.scm: New file.
* guix/scripts/import.scm: Add "elpa" to 'importers'.
* guix/scripts/import/elpa.scm: New file.
* Makefile.am (MODULES): Add 'guix/import/elpa.scm' and
'guix/scripts/import/elpa.scm'.
(SCM_TESTS): Add 'tests/elpa.scm'.
* doc/guix.texi (Invoking guix import): Document it.
* tests/elpa.scm: New file.
---
Makefile.am | 3 +
doc/guix.texi | 28 ++++++
guix/import/elpa.scm | 230 +++++++++++++++++++++++++++++++++++++++++++
guix/scripts/import.scm | 2 +-
guix/scripts/import/elpa.scm | 98 ++++++++++++++++++
tests/elpa.scm | 109 ++++++++++++++++++++
6 files changed, 469 insertions(+), 1 deletion(-)
create mode 100644 guix/import/elpa.scm
create mode 100644 guix/scripts/import/elpa.scm
create mode 100644 tests/elpa.scm
diff --git a/Makefile.am b/Makefile.am
index 2b84467..c027fb3 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -95,6 +95,7 @@ MODULES = \
guix/import/snix.scm \
guix/import/cabal.scm \
guix/import/hackage.scm \
+ guix/import/elpa.scm \
guix/scripts/download.scm \
guix/scripts/build.scm \
guix/scripts/archive.scm \
@@ -111,6 +112,7 @@ MODULES = \
guix/scripts/import/gnu.scm \
guix/scripts/import/nix.scm \
guix/scripts/import/hackage.scm \
+ guix/scripts/import/elpa.scm \
guix/scripts/environment.scm \
guix/scripts/publish.scm \
guix.scm \
@@ -182,6 +184,7 @@ SCM_TESTS = \
tests/packages.scm \
tests/snix.scm \
tests/hackage.scm \
+ tests/elpa.scm \
tests/store.scm \
tests/monads.scm \
tests/gexp.scm \
diff --git a/doc/guix.texi b/doc/guix.texi
index 46dccb8..9ef6021 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -3770,6 +3770,34 @@ package name by a hyphen and a version number as in the following example:
@example
guix import hackage mtl-2.1.3.1
@end example
+
+@item elpa
+@cindex elpa
+Import meta-data from an Emacs Lisp Package Archive (ELPA) package
+repository (@pxref{Packages,,, emacs, The GNU Emacs Manual}).
+
+Specific command-line options are:
+
+@table @code
+@item --archive=@var{repo}
+@itemx -a @var{repo}
+@var{repo} identifies the archive repository from which to retrieve the
+information. Currently the supported repositories and their identifiers
+are:
+@itemize -
+@item
+@uref{"http://elpa.gnu.org/packages", GNU}, selected by the @code{gnu}
+identifier. This is the default.
+
+@item
+@uref{"http://stable.melpa.org/packages", MELPA-Stable}, selected by the
+@code{melpa-stable} identifier.
+
+@item
+@uref{"http://melpa.org/packages", MELPA}, selected by the @code{melpa}
+identifier.
+@end itemize
+@end table
@end table
The structure of the @command{guix import} code is modular. It would be
diff --git a/guix/import/elpa.scm b/guix/import/elpa.scm
new file mode 100644
index 0000000..e8bf47d
--- /dev/null
+++ b/guix/import/elpa.scm
@@ -0,0 +1,230 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2015 Federico Beffa <beffa@fbengineering.ch>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (guix import elpa)
+ #:use-module (ice-9 match)
+ #:use-module (ice-9 rdelim)
+ #:use-module (srfi srfi-1)
+ #:use-module (srfi srfi-9)
+ #:use-module (srfi srfi-9 gnu)
+ #:use-module (srfi srfi-11)
+ #:use-module (srfi srfi-26)
+ #:use-module ((guix download) #:select (download-to-store))
+ #:use-module (guix import utils)
+ #:use-module (guix store)
+ #:use-module (guix hash)
+ #:use-module (guix base32)
+ #:use-module ((guix utils) #:select (call-with-temporary-output-file
+ memoize))
+ #:export (elpa->guix-package))
+
+(define (elpa-dependencies->names deps)
+ "Convert DEPS, a list of symbol/version pairs à la ELPA, to a list of
+package names as strings"
+ (match deps
+ (((names _ ...) ...)
+ (map symbol->string names))))
+
+(define emacs-standard-library?
+ (let ((libs '("emacs" "cl-lib")))
+ (lambda (lib)
+ "Return true if LIB is part of Emacs itself. The check is not
+exhaustive and only attempts to recognize a subset of packages which in the
+past were distributed separately from Emacs."
+ (member lib libs))))
+
+(define (filter-dependencies names)
+ "Remove the package names included with Emacs from the list of
+NAMES (strings)."
+ (filter emacs-standard-library? names))
+
+(define (elpa-name->package-name name)
+ "Given the NAME of an Emacs package, return the corresponding Guix name."
+ (let ((package-name-prefix "emacs-"))
+ (if (string-prefix? package-name-prefix name)
+ (string-downcase name)
+ (string-append package-name-prefix (string-downcase name)))))
+
+(define* (elpa-url #:optional (repo 'gnu))
+ "Retrun the URL of REPO."
+ (let ((elpa-archives
+ '((gnu . "http://elpa.gnu.org/packages")
+ (melpa-stable . "http://stable.melpa.org/packages")
+ (melpa . "http://melpa.org/packages"))))
+ (assq-ref elpa-archives repo)))
+
+(define* (elpa-fetch-archive #:optional (repo 'gnu))
+ "Retrive the archive with the list of packages available from REPO."
+ (let ((url (and=> (elpa-url repo)
+ (cut string-append <> "/archive-contents"))))
+ (if url
+ (call-with-downloaded-file url read)
+ (error "Currently not supported:" repo))))
+
+(define* (call-with-downloaded-file url proc
+ #:optional (err-msg "unavailable"))
+ "Fetch URL, store the content in a temporary file and call PROC with that
+file. Returns the value returned by PROC."
+ (call-with-temporary-output-file
+ (lambda (temp port)
+ (or (and (url-fetch url temp)
+ (call-with-input-file temp proc))
+ (error err-msg url)))))
+
+(define (is-elpa-package? name elpa-pkg-spec)
+ "Return true if the string NAME corresponds to the name of the package
+defined by ELPA-PKG-SPEC, a package specification as in an archive
+'archive-contents' file."
+ (eq? (first elpa-pkg-spec) (string->symbol name)))
+
+(define* (elpa-package-info name #:optional (repo 'gnu))
+ "Extract the information about the package NAME from the package archieve of
+REPO."
+ (let* ((archive (elpa-fetch-archive repo))
+ (pkgs (match archive ((version pkg-spec ...) pkg-spec)))
+ (info (filter (cut is-elpa-package? name <>) pkgs)))
+ (if (pair? info) (first info) #f)))
+
+;; Object to store information about an ELPA package.
+(define-record-type <elpa-package>
+ (make-elpa-package name version inputs synopsis kind home-page description
+ source-url)
+ elpa-package?
+ (name elpa-package-name)
+ (version elpa-package-version)
+ (inputs elpa-package-inputs)
+ (synopsis elpa-package-synopsis)
+ (kind elpa-package-kind)
+ (home-page elpa-package-home-page)
+ (description elpa-package-description)
+ (source-url elpa-package-source-url))
+
+(set-record-type-printer! <elpa-package>
+ (lambda (package port)
+ (format port "#<elpa-package ~a-~a>"
+ (elpa-package-name package)
+ (elpa-package-version package))))
+
+(define (elpa-version->string elpa-version)
+ "Convert the package version as used in Emacs package files into a string."
+ (if (pair? elpa-version)
+ (let-values (((ms rest) (match elpa-version
+ ((ms . rest)
+ (values ms rest)))))
+ (fold (lambda (n s) (string-append s "." (number->string n)))
+ (number->string ms) rest))
+ #f))
+
+(define (package-home-page alist)
+ "Extract the package home-page from ALIST."
+ (or (assq-ref alist ':url) "unspecified"))
+
+(define (ensure-list alist)
+ "If ALIST is the symbol 'nil return the empty list. Otherwise, return ALIST."
+ (if (eq? alist 'nil)
+ '()
+ alist))
+
+(define (package-source-url kind name version repo)
+ "Return the source URL of the package described the the strings NAME and
+VERSION at REPO. KIND is either the symbol 'single or 'tar."
+ (case kind
+ ((single) (full-url repo name ".el" version))
+ ((tar) (full-url repo name ".tar" version))
+ (else
+ #f)))
+
+(define* (full-url repo name suffix #:optional (version #f))
+ "Return the full URL of the package NAME at REPO and the SUFFIX. Maybe
+include VERSION."
+ (if version
+ (string-append (elpa-url repo) "/" name "-" version suffix)
+ (string-append (elpa-url repo) "/" name suffix)))
+
+(define (fetch-package-description kind name repo)
+ "Fetch the description of package NAME of type KIND from REPO."
+ (let ((url (full-url repo name "-readme.txt")))
+ (call-with-downloaded-file url read-string)))
+
+(define* (fetch-elpa-package name #:optional (repo 'gnu))
+ "Fetch package NAME from REPO."
+ (let ((pkg (elpa-package-info name repo)))
+ (match pkg
+ ((name version reqs synopsis kind . rest)
+ (let* ((name (symbol->string name))
+ (ver (elpa-version->string version))
+ (url (package-source-url kind name ver repo)))
+ (make-elpa-package name ver
+ (ensure-list reqs) synopsis kind
+ (package-home-page (first rest))
+ (fetch-package-description kind name repo)
+ url)))
+ (_ #f))))
+
+(define* (elpa-package->sexp pkg)
+ "Return the `package' S-expression for the Emacs package PKG, a record of
+type '<elpa-package>'."
+
+ (define name (elpa-package-name pkg))
+
+ (define version (elpa-package-version pkg))
+
+ (define source-url (elpa-package-source-url pkg))
+
+ (define dependencies
+ (let* ((deps (elpa-package-inputs pkg))
+ (names (filter-dependencies (elpa-dependencies->names deps))))
+ (map (lambda (n)
+ (let ((new-n (elpa-name->package-name n)))
+ (list new-n (list 'unquote (string->symbol new-n)))))
+ names)))
+
+ (define (maybe-inputs input-type inputs)
+ (match inputs
+ (()
+ '())
+ ((inputs ...)
+ (list (list input-type
+ (list 'quasiquote inputs))))))
+
+ (let ((tarball (with-store store
+ (download-to-store store source-url))))
+ `(package
+ (name ,(elpa-name->package-name name))
+ (version ,version)
+ (source (origin
+ (method url-fetch)
+ (uri (string-append ,@(factorize-uri source-url version)))
+ (sha256
+ (base32
+ ,(if tarball
+ (bytevector->nix-base32-string (file-sha256 tarball))
+ "failed to download package")))))
+ (build-system emacs-build-system)
+ ,@(maybe-inputs 'inputs dependencies)
+ (home-page ,(elpa-package-home-page pkg))
+ (synopsis ,(elpa-package-synopsis pkg))
+ (description ,(elpa-package-description pkg))
+ (license license:gpl3+))))
+
+(define* (elpa->guix-package name #:optional (repo 'gnu))
+ "Fetch the package NAME from REPO and produce a Guix package S-expression."
+ (let ((pkg (fetch-elpa-package name repo)))
+ (and=> pkg elpa-package->sexp)))
+
+;;; elpa.scm ends here
diff --git a/guix/scripts/import.scm b/guix/scripts/import.scm
index 45ce092..d0bdec1 100644
--- a/guix/scripts/import.scm
+++ b/guix/scripts/import.scm
@@ -73,7 +73,7 @@ rather than \\n."
;;; Entry point.
;;;
-(define importers '("gnu" "nix" "pypi" "cpan" "hackage"))
+(define importers '("gnu" "nix" "pypi" "cpan" "hackage" "elpa"))
(define (resolve-importer name)
(let ((module (resolve-interface
diff --git a/guix/scripts/import/elpa.scm b/guix/scripts/import/elpa.scm
new file mode 100644
index 0000000..9034eb7
--- /dev/null
+++ b/guix/scripts/import/elpa.scm
@@ -0,0 +1,98 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2015 Federico Beffa <beffa@fbengineering.ch>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (guix scripts import elpa)
+ #:use-module (guix ui)
+ #:use-module (guix utils)
+ #:use-module (guix import elpa)
+ #:use-module (guix scripts import)
+ #:use-module (srfi srfi-1)
+ #:use-module (srfi srfi-11)
+ #:use-module (srfi srfi-37)
+ #:use-module (ice-9 match)
+ #:use-module (ice-9 format)
+ #:export (guix-import-elpa))
+
+\f
+;;;
+;;; Command-line options.
+;;;
+
+(define %default-options
+ '((repo . 'gnu)))
+
+(define (show-help)
+ (display (_ "Usage: guix import elpa PACKAGE-NAME
+Import the latest package named PACKAGE-NAME from an ELPA repository.\n"))
+ (display (_ "
+ -a, --archive=ARCHIVE specify the archive repository"))
+ (display (_ "
+ -h, --help display this help and exit"))
+ (display (_ "
+ -V, --version display version information and exit"))
+ (newline)
+ (show-bug-report-information))
+
+(define %options
+ ;; Specification of the command-line options.
+ (cons* (option '(#\h "help") #f #f
+ (lambda args
+ (show-help)
+ (exit 0)))
+ (option '(#\V "version") #f #f
+ (lambda args
+ (show-version-and-exit "guix import elpa")))
+ (option '(#\a "archive") #t #f
+ (lambda (opt name arg result)
+ (alist-cons 'repo (string->symbol arg)
+ (alist-delete 'repo result))))
+ %standard-import-options))
+
+\f
+;;;
+;;; Entry point.
+;;;
+
+(define (guix-import-elpa . 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))))
+ (match args
+ ((package-name)
+ (let ((sexp (elpa->guix-package package-name (assoc-ref opts 'repo))))
+ (unless sexp
+ (leave (_ "failed to download package '~a'~%") package-name))
+ sexp))
+ (()
+ (leave (_ "too few arguments~%")))
+ ((many ...)
+ (leave (_ "too many arguments~%"))))))
+
+;;; elpa.scm ends here
diff --git a/tests/elpa.scm b/tests/elpa.scm
new file mode 100644
index 0000000..5d2914b
--- /dev/null
+++ b/tests/elpa.scm
@@ -0,0 +1,109 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2015 Federico Beffa <beffa@fbengineering.ch>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (test-elpa)
+ #:use-module (guix import elpa)
+ #:use-module (guix tests)
+ #:use-module (srfi srfi-1)
+ #:use-module (srfi srfi-64)
+ #:use-module (ice-9 match))
+
+(define elpa-mock-archive
+ '(1
+ (ace-window .
+ [(0 9 0)
+ ((avy
+ (0 2 0)))
+ "Quickly switch windows." single
+ ((:url . "https://github.com/abo-abo/ace-window")
+ (:keywords "window" "location"))])
+ (auctex .
+ [(11 88 6)
+ nil "Integrated environment for *TeX*" tar
+ ((:url . "http://www.gnu.org/software/auctex/"))])))
+
+(define auctex-readme-mock "This is the AUCTeX description.")
+
+(define* (elpa-package-info-mock name #:optional (repo "gnu"))
+ "Simulate retrieval of 'archive-contents' file from REPO and extraction of
+information about package NAME. (Function 'elpa-package-info'.)"
+ (let* ((archive elpa-mock-archive)
+ (info (filter (lambda (p) (eq? (first p) (string->symbol name)))
+ (cdr archive))))
+ (if (pair? info) (first info) #f)))
+
+(define elpa-version->string
+ (@@ (guix import elpa) elpa-version->string))
+
+(define package-source-url
+ (@@ (guix import elpa) package-source-url))
+
+(define nil->empty
+ (@@ (guix import elpa) nil->empty))
+
+(define package-home-page
+ (@@ (guix import elpa) package-home-page))
+
+(define make-elpa-package
+ (@@ (guix import elpa) make-elpa-package))
+
+(test-begin "elpa")
+
+(define (eval-test-with-elpa pkg)
+ (mock
+ ;; replace the two fetching functions
+ ((guix import elpa) fetch-elpa-package
+ (lambda* (name #:optional (repo "gnu"))
+ (let ((pkg (elpa-package-info-mock name repo)))
+ (match pkg
+ ((name version reqs synopsis kind . rest)
+ (let* ((name (symbol->string name))
+ (ver (elpa-version->string version))
+ (url (package-source-url kind name ver repo)))
+ (make-elpa-package name ver
+ (nil->empty reqs) synopsis kind
+ (package-home-page (first rest))
+ auctex-readme-mock
+ url)))
+ (_ #f)))))
+ (match (elpa->guix-package pkg)
+ (('package
+ ('name "emacs-auctex")
+ ('version "11.88.6")
+ ('source
+ ('origin
+ ('method 'url-fetch)
+ ('uri ('string-append
+ "http://elpa.gnu.org/packages/auctex-" 'version ".tar"))
+ ('sha256 ('base32 (? string? hash)))))
+ ('build-system 'emacs-build-system)
+ ('home-page "http://www.gnu.org/software/auctex/")
+ ('synopsis "Integrated environment for *TeX*")
+ ('description (? string?))
+ ('license 'license:gpl3+))
+ #t)
+ (x
+ (pk 'fail x #f)))))
+
+(test-assert "elpa->guix-package test 1"
+ (eval-test-with-elpa "auctex"))
+
+(test-end "elpa")
+
+\f
+(exit (= (test-runner-fail-count (test-runner-current)) 0))
--
2.2.1
next prev parent reply other threads:[~2015-06-25 18:33 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-21 8:28 [PATCH 1/5] import: Add 'elpa' importer Federico Beffa
2015-06-21 20:39 ` Alex Kost
2015-06-24 16:15 ` Federico Beffa
2015-06-24 21:06 ` Ludovic Courtès
2015-06-25 18:33 ` Federico Beffa [this message]
2015-06-27 8:13 ` Federico Beffa
2015-06-27 10:08 ` Ludovic Courtès
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