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[bug#41734] [PATCH] gnu: sudo: Separate Python output.

From: Mathieu Othacehe
Subject: [bug#41734] [PATCH] gnu: sudo: Separate Python output.
Date: Sat, 6 Jun 2020 11:00:14 +0200

The Python plugin of "sudo" drag the Python interpreter to the closure of
Guix System. Put it in a separate output.

* gnu/packages/admin.scm (sudo)[arguments]: Add a 'separate-python-output

Here's a patch to remove Python from the Guix Sytem closure. As Python
cross-compilation is broken, the "python" output cannot be populated when
cross-compiling. This is not great. An alternative would be not to provide
"python" output when cross-compiling but that requires to turn "output" into a
thunk field, and I been advised not to do that (for performance reasons) in
the past.




 gnu/packages/admin.scm | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/admin.scm b/gnu/packages/admin.scm
index 77981e520a..9d9d70c88d 100644
--- a/gnu/packages/admin.scm
+++ b/gnu/packages/admin.scm
@@ -1375,6 +1375,7 @@ system administrator.")
                   (delete-file-recursively "lib/zlib")
     (build-system gnu-build-system)
+    (outputs (list "out" "python"))
        (list (string-append "--docdir=" (assoc-ref %outputs "out")
@@ -1432,7 +1433,23 @@ system administrator.")
              (substitute* "plugins/sudoers/"
                (("^pre-install:" match)
                 (string-append match "\ndisabled-" match)))
-             #t)))
+             #t))
+         (add-after 'install 'separate-python-output
+           (lambda* (#:key target outputs #:allow-other-keys)
+             (let ((out        (assoc-ref outputs "out"))
+                   (out:python (assoc-ref outputs "python")))
+               ;; Python cross-compilation is not working.
+               (if target
+                   (mkdir-p (string-append out:python "/empty"))
+                   (for-each
+                    (lambda (file)
+                      (let ((old (string-append out "/" file))
+                            (new (string-append out:python "/" file)))
+                        (mkdir-p (dirname new))
+                        (rename-file old new)))
+                    (list "libexec/sudo/"
+                          "libexec/sudo/")))
+               #t))))
        ;; XXX: The 'testsudoers' test series expects user 'root' to exist, but
        ;; the chroot's /etc/passwd doesn't have it.  Turn off the tests.

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