build: Bump version number.

* configure.ac: Change version to 0.9.0.

gnu: glibc-locales: Update to glibc 2.22.

* gnu/packages/base.scm (glibc-locales)[arguments]: Remove
  'delete-file-recursively' call from 'build' phase.
* gnu/packages/patches/glibc-locales.patch: Adjust to glibc 2.22.

gnu: tcl: Add missing -L flag in tk.pc and tkConfig.sh.

* gnu/packages/tcl.scm (tk)[arguments]: Use 'modify-phases'.  Add
  'add-fontconfig-flag' phase.
  [inputs]: Add FONTCONFIG.

Merge branch 'master' into core-updates

profiles: Make profile-specific derivations non-substitutable.

This avoids gratuitous queries of the substituter.

* guix/profiles.scm (ghc-package-cache-file): Pass #:substitutable? #f
  to 'gexp->derivation'.
  (ca-certificate-bundle): Likewise.
  (gtk-icon-themes): Likewise.
  (profile-derivation): Likewise.
  (info-dir-file): Likewise, plus #:local-build? #t.

ui: Gracefully handle Unicode description strings.

Fixes <http://bugs.gnu.org/21536>.
Reported by Alex Kost <alezost@gmail.com>.

* guix/ui.scm (texi->plain-text): Wrap body in 'with-fluids'.
* tests/ui.scm ("package-description-string vs. Unicode"): New test.

download: Don't abbreviate things that are not store items.

Fixes a regression introduced in a8be7b9a.

* guix/build/download.scm (store-path-abbreviation): Return STORE-PATH
  if it's not an actual store path.  Fixes an out-of-range exception
  when running tests/substitute.scm and tests/store.scm.

tests: Unset 'LOCPATH' before running bootstrap program.

Reported by Mark H Weaver <mhw@netris.org>.

* tests/build-utils.scm ("wrap-program, one input, multiple calls"): Add
  'unsetenv' call.

doc: Mention /run/current-system/locale.

* doc/guix.texi (Application Setup): Add anchor and index entry.
  (Locales): Refer to it.  Mention /run/current-system/locale.

gnu: Add python-pyasn1.

* gnu/packages/python.scm (python-pyasn1, python2-pyasn1): New
  variables.

gnu: python-cffi: Update to 1.2.1.

* gnu/packages/python.scm (python-cffi): Update to 1.2.1.
  [native-inputs]: Add python-pytest.
  [arguments]: Enable tests.

tests: cran: Use cran-uri in expected output.

* tests/cran.scm: Expect output to use "cran-uri" procedure.

tests: Adjust snippet test to '.file_list' hack.

This is a followup to commit 140b4bc.

* tests/packages.scm ("package-source-derivation, snippet")[source]: Add
  'chmod' call for "..".

download: Fix some minor progress-logging regressions.

* guix/build/download.scm
  (string-pad-middle): Allow resulting padded string to overflow.
  (store-url-abbreviation): Remove unnecessary procedure.
  (progress-proc): Use BASENAME as default for parameter 'abbreviation'.
  (url-fetch): Display extra newlines for readability.

emacs-build-system: Fix 'package-name-version->elpa-name-version'.

Fixes a regression introduced in b7c7c03eb5e37fc3455e4e17b0898ffc4bca29c3.

* guix/build/emacs-build-system.scm (package-name-version->elpa-name-version):
  Remove unused 'name' binding.  Do not abuse 'strip-store-file-name' to
  remove the "emacs-" prefix, which worked before b7c7c03eb5 but not after.

emacs: Add 'guix-devel-build-package-definition'.

Suggested by Ludovic Courtès <ludo@gnu.org>.

* emacs/guix-guile.el (guix-guile-definition-regexp): New variable.
  (guix-guile-current-definition, guix-guile-boolean): New functions.
* emacs/guix-devel.el: Require 'guix-base'.
  (guix-devel-repl-processes): New variable.
  (guix-devel-setup-repl, guix-devel-setup-repl-maybe): New functions.
  (guix-devel-build-package-definition): New command.
* doc/emacs.texi (Emacs Development): Document it.

emacs: Add development utils.

* emacs/guix-guile.el (guix-guile-current-module): New function.
* emacs/guix-devel.el: New file.
* emacs.am (ELFILES): Add it.
* doc/emacs.texi (Emacs Development): New node.
  (Emacs Interface): Add it.
* doc/contributing.texi (The Perfect Setup): Mention it.
* doc/guix.texi (Top): Add it.
* emacs/guix-init.el: Add 'guix-devel-activate-mode-maybe' to
  'scheme-mode-hook'.

emacs: Add "View map" action to 'size' popup.

* emacs/guix-command.el (guix-run-view-size-map): New function.
  (guix-command-additional-execute-arguments,
  guix-command-special-executors): Add entries for "View map" action.

gnu: Import modules needed by openimageio.

* gnu/packages/graphics.scm: Add missing imports.  This is a followup to
  commit 71299c1.

gnu: Add openimageio.

* gnu/packages/graphics.scm (openimageio): New variable.