Previously, this code would cause crashes in Guix (running guix package -s for
example) which could be experienced when Emacs creates temporary files in the
gnu/packages/patches directory when a patch file has been edited, but not
saved.
* guix/discovery.scm (scheme-files): Add else clause to cond used when
handling symlinks.
A particular effect of this is that if there are ambiguous
packages in a directory specified with `-L module_dir` and the
distribution, the version from `module_dir` will be loaded,
which is usually what would be expected. (E.g. for `guix build`
or `guix package -i`.)
* guix/discovery.scm (all-modules): Return modules in path order.
* tests/guix-package.sh: Test local definitions take precedence.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
This reduces the closure of (guix discovery) from 28 to 8 modules.
* guix/discovery.scm (scheme-files): Use 'format' instead of 'warning'.
(scheme-modules): Add #:warn parameter. Use it instead of
'warn-about-load-error'.
(fold-modules): Add #:warn and pass it to 'scheme-modules'.
(all-modules): Likewise.
* gnu/bootloader.scm (bootloader-modules): Pass #:warn to 'all-modules'.
* gnu/packages.scm (fold-packages): Likewise.
* gnu/services.scm (all-service-modules): Likewise.
* guix/upstream.scm (importer-modules): Likewise.
Reported by Christopher Baines <mail@cbaines.net>
and Alex Kost <alezost@gmail.com>
at <https://lists.gnu.org/archive/html/guix-devel/2017-06/msg00290.html>.
* guix/discovery.scm (scheme-files): When ENTRY is a symlink that
doesn't end in '.scm', call 'stat' and recurse if it points to a
directory.
* tests/discovery.scm ("scheme-modules recurses in symlinks to
directories"): New test.
Fixes a regression introduced in
d27cc3bfaa.
Reported by Ricardo Wurmus <rekado@elephly.net>.
* guix/discovery.scm (scheme-files): Catch 'scandir*' system errors.
Return '() and optionally raise a warning upon 'system-error'.
* tests/discovery.scm ("scheme-modules, non-existent directory"): New
test.
On a command like:
guix environment --ad-hoc coreutils -- true
this reduces the number of 'stat' calls from 14.1K to 9.7K on my
setup (previously each getdents(2) call would be followed by one stat(2)
call per entry).
* guix/discovery.scm (scheme-files): Rewrite using 'scandir*'.
Christopher Baines