gnu: bash-completion: Update to 2.8.

* gnu/packages/bash.scm (bash-completion): Update to 2.8.
* gnu/packages/patches/bash-completion-directories.patch: Update context.

gnu/packages/bash.scm

@@ -3,6 +3,7 @@
 ;;; Copyright © 2014, 2015 Mark H Weaver <mhw@netris.org>
 ;;; Copyright © 2015, 2017 Leo Famulari <leo@famulari.name>
 ;;; Copyright © 2016, 2017 Efraim Flashner <efraim@flashner.co.il>
+;;; Copyright © 2018 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -263,7 +264,7 @@ without modification.")
 (define-public bash-completion
   (package
     (name "bash-completion")
-    (version "2.7")
+    (version "2.8")
     (source (origin
               (method url-fetch)
               (uri (string-append
@@ -271,7 +272,7 @@ without modification.")
                     version "/" name "-" version ".tar.xz"))
               (sha256
                (base32
-                "07j484vb3k90f4989xh1g1x99g01akrp69p3dml4lza27wnqkfj1"))
+                "0kgmflrr1ga9wfk770vmakna3nj46ylb5ky9ipd0v2k9ymq5a7y0"))
               (patches
                (search-patches "bash-completion-directories.patch"))))
     (build-system gnu-build-system)

gnu/packages/patches/bash-completion-directories.patch

@@ -8,9 +8,9 @@ directory, but also in the user's profile and in the system profile.
 This is what this patch does.
 
 
---- a/bash_completion	2016-08-03 10:23:02.356782287 +0200
-+++ b/bash_completion	2016-08-03 10:27:50.120140403 +0200
-@@ -1960,7 +1960,13 @@
+--- a/bash_completion
++++ b/bash_completion
+@@ -2016,7 +2016,13 @@ complete -F _minimal ''
  
  __load_completion()
  {
@@ -22,6 +22,6 @@ This is what this patch does.
 +        "/run/current-system/profile/etc/bash_completion.d/$base"
 +        ${BASH_COMPLETION_USER_DIR:-${XDG_DATA_HOME:-$HOME/.local/share}/bash-completion}/completions )
 +
-     local OIFS=$IFS IFS=: dir cmd="$1" compfile
+     local OIFS=$IFS IFS=: dir cmd="${1##*/}" compfile
      for dir in ${XDG_DATA_DIRS:-/usr/local/share:/usr/share}; do
          dirs+=( $dir/bash-completion/completions )