ui: Add 'symlink' replacement with better error reporting.
* guix/ui.scm (symlink): New procedure.
guix package: -A and -s take supported systems into account.
* guix/scripts/package.scm (guix-package)[process-query]
<list-available>: Restrict results to packages matching
'supported-package?".
* guix/ui.scm (package->recutils): Print "systems:".
* tests/guix-package.sh: Add tests.
* doc/guix.texi (Invoking guix package): Adjust description of
'--list-available' accordingly.
Merge branch 'core-updates'
Merge branch 'master' into core-updates
gnu: Emit a warning when a package module cannot be loaded.
* guix/ui.scm (warn-about-load-error): New procedure.
* gnu/packages.scm (package-modules): Wrap 'resolve-interface' call in
'catch #t', and call 'warn-about-load-error' in handler.
ui: Add 'report-load-error'.
* guix/scripts/system.scm (read-operating-system): Replace error
handling code by a call to 'report-load-error'.
* guix/ui.scm (report-load-error): New procedure.
ui: Recognize 'guix help'.
Suggested by Andy Wingo.
* guix/ui.scm (guix-main): Add "help" case.
Merge branch 'master' into core-updates
Rename 'guix substitute-binary' to 'guix substitute'.
* guix/scripts/substitute-binary.scm: Rename to...
* guix/scripts/substitute.scm: ... this. Adjust module name, entry
point, comments, and help string accordingly.
* nix/scripts/substitute-binary.in: Rename to...
* nix/scripts/substitute.in: ... this.
* pre-inst-env.in (NIX_SUBSTITUTERS): Adjust accordingly.
* tests/substitute-binary.scm: Rename to...
* tests/substitute.scm: ... this. Adjust references to (guix scripts
substitute) accordingly.
* guix/ui.scm (show-guix-help)[internal?]: Change "substitute-binary" to
"substitute".
* Makefile.am (MODULES, SCM_TESTS): Adjust to file renames.
* daemon.am (nodist_pkglibexec_SCRIPTS): Likewise.
* config-daemon.ac: Likewise.
* guix/tests.scm (call-with-derivation-narinfo): Adjust comments and
docstring.
Merge branch 'master' into core-updates
ui: Add missing copyright line.
* guix/ui.scm: Add copyright line for Deck (aka. nebuli).
ui: Factorize command-line + env. var. option parsing.
* guix/ui.scm (%default-argument-handler, parse-command-line): New
procedures.
(environment-build-options): Make private.
* guix/scripts/archive.scm (guix-archive)[parse-options,
parse-options-from]: Remove. Use 'parse-command-line' instead.
* guix/scripts/build.scm (guix-build): Likewise.
* guix/scripts/environment.scm (guix-environment): Likewise.
* guix/scripts/package.scm (guix-package): Likewise.
* guix/scripts/system.scm (guix-system): Likewise.
* tests/ui.scm (with-environment-variable): New macro.
("parse-command-line"): New test.
profiles: Distinguish downgrades from upgrades.
Fixes <http://bugs.gnu.org/19764>.
* guix/profiles.scm (manifest-transaction-effects): Return downgraded
packages as a fourth value.
* guix/ui.scm (show-manifest-transaction): Adjust accordingly.
* tests/profiles.scm ("manifest-transaction-effects and downgrades"):
New test.
ui: Properly report '&nar-error' conditions.
This is a followup to 46b8aad.
* guix/ui.scm (call-with-error-handling): Add 'nar-error?' case.
ui: Update copyright year in '--version' output.
* guix/ui.scm (show-version-and-exit): Increment copyright year.
derivations: Raise an error for references to non-existent outputs.
Fixes <http://bugs.gnu.org/19630>.
Reported by Ricardo Wurmus <ricardo.wurmus@mdc-berlin.de>.
* guix/derivations.scm (&derivation-error,
&derivation-missing-output-error): New error conditions.
(derivation->output-path): Raise a '&derivation-missing-output-error'
if OUTPUT is not an output of DRV.
* guix/ui.scm (call-with-error-handling): Add case for
'derivation-missing-output-error?'.
(show-what-to-build): Check whether (derivation-outputs drv) is
empty.
* tests/packages.scm ("reference to non-existent output"): Add test.
guix system: Improve error messages.
* guix/ui.scm (report-error): Export.
* guix/scripts/system.scm (read-operating-system): Report syntax errors
using standard GNU format. Report other errors using 'display-error'.
Merge branch 'master' into core-updates
derivations: Add 'substitution-oracle' and use it.
This makes 'guix environment PACKAGE' significantly faster when
substitutes are enabled. Before that, it would lead to many invocations
of 'guix substitute-binary', one per 'derivation-prerequisites-to-build'
call. Now, all these are replaced by a single invocation.
* guix/derivations.scm (derivation-output-paths, substitution-oracle):
New procedures.
(derivation-prerequisites-to-build): Replace #:use-substitutes? with
#:substitutable?. Remove the local 'derivation-output-paths' and
'substitutable?'.
* guix/ui.scm (show-what-to-build): Add 'substitutable?'. Pass it to
'derivation-prerequisites-to-build'.
[built-or-substitutable?]: Use it instead of 'has-substitutes?'.
* tests/derivations.scm ("derivation-prerequisites-to-build and
substitutes"): Use #:substitutable? instead of #:use-substitutes?.