package: Use ~/.guix-profile as the default for --search-paths.

* guix/scripts/package.scm (search-path-environment-variables): Prefer
  %USER-ENVIRONMENT-DIRECTORY when it points to PROFILE.
  (display-search-paths): Use 3 spaces for indentation.

package: Display the output of packages to be installed/removed.

* guix/scripts/package.scm (guix-package)[show-what-to-remove/install]:
  Display the output name.

package: Preserve the installed package output when upgrading.

* guix/scripts/package.scm (guix-package)[find-package]: Add optional
  parameter `output'.  Use it.
  [process-actions]: When computing UPGRADE, pass OUTPUT to
  `find-package'.

package: Fix spacing in user messages.

* guix/scripts/package.scm (guix-package)[process-actions]: Fix spacing.

refresh: Change default to not update source files.

* guix/scripts/refresh.scm (%options): Change `--dry-run' to `--update'.
  (show-help): Adjust accordingly.
  (guix-refresh): Likewise.

Merge branch 'core-updates'

substitute-binary: Support decompression from non-file ports.

* guix/scripts/substitute-binary.scm (filtered-port): Move to utils.scm.
  (decompressed-port): Upon "none", return '() as the second value.
  (guix-substitute-binary): Expect `decompressed-port' to return a list
  of PIDs as its second value.
* guix/utils.scm (filtered-port): New procedure.  Add case for when
  INPUT is not `file-port?'.
* tests/utils.scm ("filtered-port, file", "filtered-port, non-file"):
  New tests.

guix package: Add `--search-paths' & co.

* guix/scripts/package.scm (search-path-environment-variables,
  display-search-paths): New procedures.
  (show-help, %options): Add `--search-paths'.
  (guix-package)[process-actions]: Call `display-search-paths' once the
  profile is ready.
  [process-query]: Honor `search-paths'.

ui: Add `args-fold*' and use it.

* guix/ui.scm (args-fold*): New procedure.
* guix/scripts/build.scm, guix/scripts/download.scm,
  guix/scripts/gc.scm, guix/scripts/hash.scm, guix/scripts/import.scm,
  guix/scripts/package.scm, guix/scripts/pull.scm,
  guix/scripts/refresh.scm: Use `args-fold*' instead of `args-fold'.

pull: Use `download-to-store'.

* guix/scripts/pull.scm (download-and-store): Remove.
  (unpack): Use `download-to-store' instead.

Merge branch 'master' into core-updates

Conflicts:
	Makefile.am
	gnu/packages/autotools.scm
	gnu/packages/guile.scm
	gnu/packages/python.scm
	gnu/packages/shishi.scm
	guix/gnu-maintenance.scm
	guix/scripts/build.scm
	guix/scripts/gc.scm
	guix/scripts/package.scm
	guix/scripts/substitute-binary.scm
	guix/ui.scm
	nix/nix-daemon/guix-daemon.cc
	test-env.in
	tests/nar.scm
	tests/store.scm

refresh: Add `--select'.

* guix/scripts/refresh.scm (%options): Add `--select'.
  (show-help): Likewise.  Augment initial help text.
  (guix-refresh)[core-package?]: New procedure.
  Use it when selecting packages.

web: Factorize `http-get' hackery.

This should fix `substitute-binary --query' on Guile 2.0.5.

* guix/web.scm: New file.
* Makefile.am (MODULES): Add it.
* po/POTFILES.in: Add it.
* guix/gnu-maintenance.scm (http-fetch): Remove.
  (%package-list-url): Turn into a URI.
  (official-gnu-packages): Add #:text? #t to `http-fetch' call.
* guix/scripts/substitute-binary.scm (fetch): Remove `http' case, and
  use `http-fetch' instead.

Add `guix refresh' and related auto-update tools.

* guix/gnu-maintenance.scm (ftp-server/directory)[quirks]: Add glib.
  (package-update-path, download-tarball, package-update,
  update-package-source): New procedures.
* guix/gnupg.scm, guix/scripts/refresh.scm: New files.
* Makefile.am (MODULES): Add them.
* guix/utils.scm (file-extension): New procedure.

Factorize `download-and-store'.

* guix/download.scm (download-to-store): New procedure.
* guix/scripts/download.scm (fetch-and-store): Remove.
  (guix-download): Use `download-to-store' instead.
* guix/ui.scm (call-with-temporary-output-file): Move to...
* guix/utils.scm (call-with-temporary-output-file): ... here.

Add 'guix hash'.

* guix/scripts/hash.scm: New file.
* Makefile.am (MODULES): Add it.
* po/POTFILES.in: Add it.
* doc/guix.texi (Invoking guix hash): New node.
  (Defining Packages): Add a cross-reference to the 'Invoking guix
  hash' node.

guix download: Add supported formats to '--help'.

* guix/scripts/download.scm (show-help): Add supported formats.

ui: Add a 'define-diagnostic' macro.

* guix/ui.scm (define-diagnostic): New macro, which is based on the
  previous version of 'warning'.
  (warning, leave): Redefine using 'define-diagnostic'.
  (report-error): New macro.
  (install-locale): Use 'warning' instead of 'format'.
  (call-with-error-handling): Adjust 'leave'.
* gnu/packages.scm (package-files): Use 'warning' instead of 'format'.
* guix/gnu-maintenance.scm (http-fetch): Use 'warning' and 'leave'.
* guix/scripts/build.scm (derivations-from-package-expressions, guix-build):
  Adjust 'leave'.
* guix/scripts/download.scm (guix-download): Adjust 'leave'.
* guix/scripts/gc.scm (size->number, %options): Adjust 'leave'.
* guix/scripts/package.scm (roll-back, guix-package): Adjust 'leave'.
* po/POTFILES.in: Add 'guix/gnu-maintenance.scm'.

substitute-binary: Remove expired cache entries once in a while.

* guix/scripts/substitute-binary.scm (%narinfo-expired-cache-entry-removal-delay):
  New variable.
  (obsolete?): New procedure, formerly in `lookup-narinfo'.
  (lookup-narinfo): Adjust accordingly.
  (remove-expired-cached-narinfos, maybe-remove-expired-cached-narinfo):
  New procedures.
  (guix-substitute-binary): Call `maybe-remove-expired-cached-narinfo'.

guix package: Allow the search of the latest release to be interrupted.

* guix/scripts/package.scm (%sigint-prompt): New variable.
  (call-with-sigint-handler): New procedure.
  (waiting): Use it.