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guix: pack: Fix offset calculation for store directory mount point.

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Fixes wrapping of non-package things, where the target store directory may
differ in length from the original.

* guix/scripts/pack.scm (wrapped-package)<build-wrapper>: Define
WRAPPER_PROGRAM macro with wrapper's file name.
* gnu/packages/aux-files/run-in-namespace.c (main): Offset index by len of
that file name.
This commit is contained in:
Eric Bavier 2020-10-21 18:33:52 -05:00
parent eee35fe3b7
commit a73896425e
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GPG key ID: FD73CAC719D32566
2 changed files with 6 additions and 2 deletions
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2
gnu/packages/aux-files/run-in-namespace.c
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@ -620,7 +620,7 @@ main (int argc, char *argv[])
/* SELF is something like "/home/ludo/.local/gnu/store/…-foo/bin/ls" and we
want to extract "/home/ludo/.local/gnu/store". */
size_t index = strlen (self)
- strlen ("@WRAPPED_PROGRAM@") + strlen (original_store);
- strlen (WRAPPER_PROGRAM) + strlen (original_store);
char *store = strdup (self);
store[index] = '\0';

6
guix/scripts/pack.scm
View file

@ -5,6 +5,7 @@
;;; Copyright © 2018 Chris Marusich <cmmarusich@gmail.com>
;;; Copyright © 2018 Efraim Flashner <efraim@flashner.co.il>
;;; Copyright © 2020 Tobias Geerinckx-Rice <me@tobias.gr>
;;; Copyright © 2020 Eric Bavier <bavier@posteo.net>
;;;
;;; This file is part of GNU Guix.
;;;
@ -847,7 +848,7 @@ (define (build-wrapper program)
(("@STORE_DIRECTORY@") (%store-directory)))
(let* ((base (strip-store-prefix program))
(result (string-append target "/" base))
(result (string-append target base))
(proot #$(and proot?
#~(string-drop
#$(file-append (proot) "/bin/proot")
@ -856,6 +857,9 @@ (define (build-wrapper program)
(mkdir-p (dirname result))
(apply invoke #$compiler "-std=gnu99" "-static" "-Os" "-g0" "-Wall"
"run.c" "-o" result
(string-append "-DWRAPPER_PROGRAM=\""
(canonicalize-path (dirname result)) "/"
(basename result) "\"")
(append (if proot
(list (string-append "-DPROOT_PROGRAM=\""
proot "\""))