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authorRicardo Wurmus <ricardo.wurmus@mdc-berlin.de>2018-08-30 15:02:10 +0200
committerRicardo Wurmus <rekado@elephly.net>2018-08-30 15:22:14 +0200
commite37f889404b9055a50ea1b47259ce4acae23167d (patch)
tree427b3a48b6e646cd31d982841b0c9e5404914446 /guix/import/pypi.scm
parenta3ece51a29241c7060323cbbfc602c83200ffe4a (diff)
import: pypi: Also guess dependencies from *.egg-info/requires.txt.
* guix/import/pypi.scm (guess-requirements): Extract "requires.txt" from the egg-info directory in addition to "requirements.txt"; strip off version constraints; use call-with-temporary-directory.
Diffstat (limited to 'guix/import/pypi.scm')
-rw-r--r--guix/import/pypi.scm54
1 files changed, 31 insertions, 23 deletions
diff --git a/guix/import/pypi.scm b/guix/import/pypi.scm
index 25560bac46..51c2d5264a 100644
--- a/guix/import/pypi.scm
+++ b/guix/import/pypi.scm
@@ -3,6 +3,7 @@
;;; Copyright © 2015 Cyril Roelandt <tipecaml@gmail.com>
;;; Copyright © 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com>
+;;; Copyright © 2018 Ricardo Wurmus <rekado@elephly.net>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -36,7 +37,8 @@
#:use-module (guix utils)
#:use-module ((guix build utils)
#:select ((package-name->name+version
- . hyphen-package-name->name+version)))
+ . hyphen-package-name->name+version)
+ find-files))
#:use-module (guix import utils)
#:use-module ((guix download) #:prefix download:)
#:use-module (guix import json)
@@ -114,9 +116,9 @@ package definition."
`((propagated-inputs (,'quasiquote ,package-inputs))))))
(define (guess-requirements source-url wheel-url tarball)
- "Given SOURCE-URL, WHEEL-URL and a TARBALL of the package, return a list of
-the required packages specified in the requirements.txt file. TARBALL will be
-extracted in the current directory, and will be deleted."
+ "Given SOURCE-URL, WHEEL-URL and a TARBALL of the package, return a list
+of the required packages specified in the requirements.txt file. TARBALL will
+be extracted in a temporary directory."
(define (tarball-directory url)
;; Given the URL of the package's tarball, return the name of the directory
@@ -140,8 +142,8 @@ cannot determine package dependencies"))
;; file, remove everything other than the actual name of the required
;; package, and return it.
(string-take s
- (or (string-index s #\space)
- (string-length s))))
+ (or (string-index s (lambda (chr) (member chr '(#\space #\> #\= #\<))))
+ (string-length s))))
(define (comment? line)
;; Return #t if the given LINE is a comment, #f otherwise.
@@ -197,31 +199,37 @@ cannot determine package dependencies"))
(read-wheel-metadata temp))
#f))))
-
(define (guess-requirements-from-source)
;; Return the package's requirements by guessing them from the source.
(let ((dirname (tarball-directory source-url)))
(if (string? dirname)
- (let* ((req-file (string-append dirname "/requirements.txt"))
- (exit-code (system* "tar" "xf" tarball req-file)))
- ;; TODO: support more formats.
- (if (zero? exit-code)
- (dynamic-wind
- (const #t)
- (lambda ()
- (read-requirements req-file))
- (lambda ()
- (delete-file req-file)
- (rmdir dirname)))
- (begin
- (warning (G_ "'tar xf' failed with exit code ~a\n")
- exit-code)
- '())))
+ (call-with-temporary-directory
+ (lambda (dir)
+ (let* ((pypi-name (string-take dirname (string-rindex dirname #\-)))
+ (req-files (list (string-append dirname "/requirements.txt")
+ (string-append dirname "/" pypi-name ".egg-info"
+ "/requires.txt")))
+ (exit-codes (map (lambda (file-name)
+ (parameterize ((current-error-port (%make-void-port "rw+"))
+ (current-output-port (%make-void-port "rw+")))
+ (system* "tar" "xf" tarball "-C" dir file-name)))
+ req-files)))
+ ;; Only one of these files needs to exist.
+ (if (any zero? exit-codes)
+ (match (find-files dir)
+ ((file . _)
+ (read-requirements file))
+ (()
+ (warning (G_ "No requirements file found.\n"))))
+ (begin
+ (warning (G_ "Failed to extract requirements files\n"))
+ '())))))
'())))
;; First, try to compute the requirements using the wheel, since that is the
;; most reliable option. If a wheel is not provided for this package, try
- ;; getting them by reading the "requirements.txt" file from the source. Note
+ ;; getting them by reading either the "requirements.txt" file or the
+ ;; "requires.txt" from the egg-info directory from the source tarball. Note
;; that "requirements.txt" is not mandatory, so this is likely to fail.
(or (guess-requirements-from-wheel)
(guess-requirements-from-source)))