guix package: Declutter the entry point.
* guix/scripts/package.scm (newest-available-packages,
find-best-packages-by-name, find-package, upgradeable?): New
procedures, moved from...
(guix-package): ... here.
guix package: '--search' matches against package names.
* guix/scripts/package.scm (find-packages-by-description): Return
packages whose name matches RX.
pull: Compile modules correctly regardless of the compilation order.
* guix/scripts/pull.scm (unpack)[builder]: Work around
<http://bugs.gnu.org/15602>.
pull: Simplify the builder.
* guix/scripts/pull.scm (unpack)[builder]: Use 'copy-recursively' and
'copy-file' instead of 'file-system-fold'.
pull: Add '--url' option.
* guix/scripts/pull.scm (%default-options): Add 'tarball-url' pair.
(%options, show-help): Add '--url'.
(guix-pull): Honor it.
Merge branch 'core-updates'
guix package: '--delete-generations' deletes generations older than specified.
* guix/scripts/package.scm (matching-generations): Add
'duration-relation' keyword parameter.
(guix-package)[process-action](delete-generations): Pass
#:duration-relation >.
* tests/guix-package.sh: Add test.
* doc/guix.texi (Invoking guix package): Clarify the meaning of
durations for '--list-durations' and '--delete-durations'.
guix package: Add '--delete-generations'.
* guix/scripts/package.scm (switch-to-previous-generation): New function.
(roll-back): Use the new function instead of 'switch-link'.
(show-help): Add '--delete-generations'.
(%options): Likewise.
(guix-package)[process-actions]: Add 'current-generation-number',
'display-and-delete', and 'delete-generation'. Add support for
'--delete-generations', and reindent the code.
* tests/guix-package.sh: Test '--delete-generations'.
* doc/guix.texi (Invoking guix-package): Document '--delete-generations'.
guix package: Add 'link-to-empty-profile'.
* guix/scripts/package.scm (link-to-empty-profile): New function.
(roll-back): Use it.
guix package: Exit with 0 when there is nothing to list.
* guix/scripts/package.scm (guix-package)[process-query]: Exit with 0
when there are no generations containing packages or no profiles.
Merge branch 'master' into core-updates
guix package: Show which generation is the current one.
* guix/scripts/package.scm (guix-package)[process-query]: Show that a
generation is the current one if the profile points to it.
* tests/guix-package.sh: Test it.
guix package: Do not list the zeroth generation.
* guix/scripts/package.scm (guix-package)[process-query]: Change
'list-generation' to not list the zeroth generation.
* tests/guix-package.sh: Test it.
* doc/guix.texi (Invoking guix package): Document it, and use the
right term when talking about generations.
guix package: Exit with 1 when a generation cannot be listed.
* guix/scripts/package.scm (guix-package)[process-query]: Exit with 1
when a generation does not exist or the profile points to the zeroth
generation.
* tests/guix-package.sh: Test the former case.
Merge branch 'master' into core-updates
guix package: Show most recently installed packages last.
Suggested by Andreas Enge <andreas@enge.fr>.
* guix/scripts/package.scm (guix-package)[list-generations,
list-installed]: Reverse the result of 'manifest-packages'.
* doc/guix.texi (Invoking guix package): Document the order of packages
for '--list-generations' and '--list-installed'.
guix package: Sort the list of generation numbers in '--list-generations'.
* guix/scripts/package.scm (generation-numbers): Sort the result.
guix package: Internationalize "Generation" string.
* guix/scripts/package.scm (guix-package): Internationalize generation
listing.
guix package: Add '--list-generations'.
* guix/scripts/package.scm: Import (srfi srfi-19).
(generation-time, matching-generations): New functions.
(show-help): Add '--list-generations'.
(%options): Likewise.
(guix-package)[process-query]: Add support for '--list-generations'.
* guix/ui.scm: Import (srfi srfi-19) and (ice-9 regex).
(string->generations, string->duration): New functions.
* tests/guix-package.sh: Test '--list-generations'.
* tests/ui.scm: Import (srfi srfi-19).
Test 'string->generations' and 'string->duration'.
* doc/guix.texi (Invoking guix-package): Document '--list-generations'.