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'.
build-system/trivial: Take the 'source' field into account.
* guix/build-system/trivial.scm (trivial-build): When SOURCE is true,
add it to INPUTS.
(trivial-cross-build): Likewise.
* tests/packages.scm ("trivial with source"): New test.
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
packages: Make the 'output' parameter of 'package-output' optional.
* guix/packages.scm (package-output): Make the 'output' parameter
optional.
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
nar: Fix file descriptor leak when writing a Nar.
* guix/nar.scm (write-contents)[call-with-binary-input-file]: Always
close PORT.
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'.
derivations: 'derivation' and related procedures return a single value.
* guix/derivations.scm (derivation->output-path,
derivation->output-paths): New procedures.
(derivation-path->output-path): Use 'derivation->output-path'.
(derivation-path->output-paths): Use 'derivation->output-paths'.
(derivation): Accept 'derivation?' objects as inputs. Return a single
value.
(build-derivations): New procedure.
(compiled-modules): Use 'derivation->output-paths'.
(build-expression->derivation)[source-path]: Add case for when the
input matches 'derivation?'.
[prologue]: Accept 'derivation?' objects in INPUTS.
[mod-dir, go-dir]: Use 'derivation->output-path'.
* guix/download.scm (url-fetch): Adjust to the single-value return.
* guix/packages.scm (package-output): Use 'derivation->output-path'.
* guix/scripts/build.scm (guix-build): When the argument is
'derivation-path?', pass it through 'read-derivation'.
Use 'derivation-file-name' to print out the .drv file names, and to
register them. Use 'derivation->output-path' instead of
'derivation-path->output-path'.
* guix/scripts/package.scm (roll-back): Adjust to the single-value
return.
(guix-package): Use 'derivation->output-path'.
* guix/ui.scm (show-what-to-build): Adjust to deal with 'derivation?'
objects instead of .drv file names.
* gnu/system/grub.scm (grub-configuration-file): Use
'derivation->output-path' instead of 'derivation-path->output-path'.
* gnu/system/vm.scm (qemu-image, system-qemu-image): Likewise.
* tests/builders.scm, tests/derivations.scm, tests/packages.scm,
tests/store.scm, tests/union.scm: Adjust to the new calling
convention.
* doc/guix.texi (Defining Packages, The Store, Derivations): Adjust
accordingly.
derivations: Add a nicer printer.
* guix/derivations.scm (<derivation>): Add a printer.