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discovery: 'all-modules' returns modules in path order.

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 commit is contained in:
Robert Vollmert 2019-05-25 08:40:38 +02:00 committed by Ludovic Courtès
parent dfc69e4b6d
commit 002d17dcaa
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GPG key ID: 090B11993D9AEBB5
2 changed files with 16 additions and 2 deletions

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@ -145,8 +145,8 @@ Call (PROC MODULE RESULT) for each module that is found."
"Return the list of package modules found in PATH, a list of directories to
search. Entries in PATH can be directory names (strings) or (DIRECTORY
. SUB-DIRECTORY) pairs, in which case modules are searched for beneath
SUB-DIRECTORY."
(fold-modules cons '() path #:warn warn))
SUB-DIRECTORY. Modules are listed in the order they appear on the path."
(reverse (fold-modules cons '() path #:warn warn)))
(define (fold-module-public-variables* proc init modules)
"Call (PROC MODULE SYMBOL VARIABLE) for each variable exported by one of MODULES,

View file

@ -280,6 +280,20 @@ export GUIX_PACKAGE_PATH
guix package -A emacs-foo-bar | grep 42
guix package -i emacs-foo-bar@42 -n
# Make sure GUIX_PACKAGE_PATH/'-L' takes precedence in case of duplicate packages.
cat > "$module_dir/bar.scm"<<EOF
(define-module (bar)
#:use-module (guix packages))
(define-public hello
(package (inherit (@@ (gnu packages base) hello))
(synopsis "an overridden version of GNU hello")))
EOF
guix package -i hello -n 2>&1 | grep choosing.*bar.scm
( unset GUIX_PACKAGE_PATH; \
guix package -i hello -n -L "$module_dir" 2>&1 | grep choosing.*bar.scm )
# Make sure patches that live under $GUIX_PACKAGE_PATH are found.
cat > "$module_dir/emacs.patch"<<EOF
This is a fake patch.