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| | ;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015 Federico Beffa <beffa@fbengineering.ch>
;;; Copyright © 2015, 2016, 2017, 2018 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2018 Oleg Pykhalov <go.wigust@gmail.com>
;;; Copyright © 2019 Carlo Zancanaro <carlo@zancanaro.id.au>
;;;
;;; 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 melpa)
#:use-module (gcrypt hash)
#:use-module (guix base32)
#:use-module (guix git)
#:use-module (guix http-client)
#:use-module (guix import utils)
#:use-module (guix serialization)
#:use-module (guix store)
#:use-module (ice-9 control)
#:use-module (ice-9 ftw)
#:use-module (ice-9 match)
#:use-module (ice-9 rdelim)
#:use-module (ice-9 regex)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-11)
#:use-module (srfi srfi-26)
#:use-module (web uri)
#:export (melpa->guix-package))
(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* (download-git-repository url ref)
(with-store store
(latest-repository-commit store url #:ref ref)))
(define (package-name->recipe-url package-name)
(string-append "https://raw.githubusercontent.com/melpa/melpa/master/recipes/"
package-name))
(define (package-name->recipe package-name)
(define (data->recipe data)
(match data
(() '())
((key value . tail)
(cons (cons key value) (data->recipe tail)))))
(let* ((port (http-fetch/cached (string->uri (package-name->recipe-url package-name))
#:ttl (* 6 3600)))
(previous-keyword-mode (match (member 'keywords (read-options))
((_ value . _) value)))
(data (begin
(read-set! keywords 'prefix)
(read port))))
(read-set! keywords previous-keyword-mode)
(close-port port)
(data->recipe (cons #:name data))))
(define (github-repo->url repo)
(string-append "https://github.com/" repo ".git"))
(define (gitlab-repo->url repo)
(string-append "https://gitlab.com/" repo ".git"))
;; XXX adapted from (guix scripts hash)
(define (file-hash file select? recursive?)
;; Compute the hash of FILE.
(if recursive?
(let-values (((port get-hash) (open-sha256-port)))
(write-file file port #:select? select?)
(force-output port)
(get-hash))
(call-with-input-file file port-sha256)))
;; XXX taken from (guix scripts hash)
(define (vcs-file? file stat)
(case (stat:type stat)
((directory)
(member (basename file) '(".bzr" ".git" ".hg" ".svn" "CVS")))
((regular)
;; Git sub-modules have a '.git' file that is a regular text file.
(string=? (basename file) ".git"))
(else
#f)))
(define (emacs-requires->inputs requires)
(define (require-symbol->input-string require)
(let ((require-string (symbol->string (if (pair? require)
(car require)
require))))
(if (emacs-standard-library? require-string)
#f
(string-append "emacs-" require-string))))
(package-names->package-inputs
(filter identity (map require-symbol->input-string requires))))
;; This is a regular expression that will extract the package requirements
;; from a line of elisp. See "(elisp) Library Headers" for more details about
;; this header.
(define package-depends-regexp
(make-regexp "\\s*;+\\s**package-requires:(.*)" regexp/icase))
(define (find-package-inputs directory)
(define (for-each-line f file)
(call-with-input-file file
(lambda (port)
(let loop ()
(let ((line (read-line port 'concat)))
(unless (eof-object? line)
(f line)
(loop)))))))
(emacs-requires->inputs
(call/ec (lambda (return)
(for-each
(lambda (filename)
(for-each-line
(lambda (line)
(let ((match-data (regexp-exec package-depends-regexp line)))
(when match-data
(return (with-input-from-string (match:substring match-data 1)
read)))))
(string-append directory "/" filename)))
(scandir directory (cut string-suffix-ci? ".el" <>)))
(return '())))))
(define (git-repository->package recipe url)
(define ref
(cond
((assoc-ref recipe #:branch)
=> (lambda (branch) (cons 'branch branch)))
((assoc-ref recipe #:commit)
=> (lambda (commit) (cons 'commit commit)))
(else
'(branch . "master"))))
(define (maybe-inputs input-type inputs)
(if (null? inputs)
(list)
(list (list input-type (list 'quasiquote inputs)))))
(define (maybe-arguments files)
(define (glob->regexp glob)
(string-append
"^"
(regexp-substitute/global #f "\\*\\*?" glob
'pre
(lambda (m)
(if (string= (match:substring m 0) "**")
".*"
"[^/]+"))
'post)
"$"))
(if files
`((arguments '(#:include ',(map glob->regexp (remove pair? files))
#:exclude ',(map glob->regexp (apply append
(map (match-lambda
((#:exclude . values)
values)
(_ '()))
files))))))
'()))
(let-values (((directory commit) (download-git-repository url ref)))
(let ((inputs (find-package-inputs directory)))
`(package
(name ,(string-append "emacs-" (symbol->string (assoc-ref recipe #:name))))
(version , (strftime "%Y%m%d" (gmtime (current-time))))
(source (origin
(method git-fetch)
(uri (git-reference
(url ,url)
(commit ,commit)))
(sha256
(base32
,(bytevector->nix-base32-string
(file-hash directory (negate vcs-file?) #t))))))
(build-system emacs-build-system)
,@(maybe-inputs 'propagated-inputs
(find-package-inputs directory))
,@(maybe-arguments (assoc-ref recipe #:files))
(home-page #f)
(description #f)
(synopsis #f)
(license #f)))))
(define (melpa->guix-package package-name)
"Construct a Guix package based on the MELPA recipe for PACKAGE-NAME."
(let ((recipe (package-name->recipe package-name)))
(match (assoc-ref recipe #:fetcher)
('github (git-repository->package recipe
(github-repo->url (assoc-ref recipe #:repo))))
('gitlab (git-repository->package recipe
(gitlab-repo->url (assoc-ref recipe #:repo))))
('git (git-repository->package recipe
(assoc-ref recipe #:url)))
(_ (leave (G_ "Only github, gitlab, and git repositories are currently supported"))))))
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