Bash-completion is written with FHS in mind where completion scripts
all get added to /usr/share/bash-completion/completions and are picked
up by the dynamic completion loader from there---whether they are
part of bash-completion or installed by another package.

On Guix systems, we want not only to search within bash-completion's own
directory, but also in the user's profile and guix home profile, as well
as in the system profile.
This is what this patch does.


--- a/bash_completion
+++ b/bash_completion
@@ -2173,7 +2173,15 @@ complete -F _minimal ''
 
 __load_completion()
 {
-    local -a dirs=(${BASH_COMPLETION_USER_DIR:-${XDG_DATA_HOME:-$HOME/.local/share}/bash-completion}/completions)
+    local -a dirs=(
+        ${BASH_COMPLETION_USER_DIR:-${XDG_DATA_HOME:-$HOME/.local/share}/bash-completion}/completions
+        "$HOME/.guix-profile/share/bash-completion/completions"
+        "$HOME/.guix-profile/etc/bash_completion.d"
+        "$HOME/.guix-home/profile/share/bash-completion/completions"
+        "$HOME/.guix-home/profile/etc/bash_completion.d"
+        "/run/current-system/profile/share/bash-completion/completions"
+        "/run/current-system/profile/etc/bash_completion.d" )
+
     local ifs=$IFS IFS=: dir cmd="${1##*/}" compfile
     [[ -n $cmd ]] || return 1
     for dir in ${XDG_DATA_DIRS:-/usr/local/share:/usr/share}; do
         dirs+=( $dir/bash-completion/completions )
em/keyboard.scm?id=78b3727b6030715aef69a999f97a5d8e673a89db'>commit</a><a href='/guix/diff/gnu/system/keyboard.scm?id=78b3727b6030715aef69a999f97a5d8e673a89db'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/system/keyboard.scm'>
<input type='hidden' name='id' value='78b3727b6030715aef69a999f97a5d8e673a89db'/><input type='hidden' name='showmsg' value='1'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=78b3727b6030715aef69a999f97a5d8e673a89db&amp;showmsg=1'>root</a>/<a href='/guix/log/gnu?id=78b3727b6030715aef69a999f97a5d8e673a89db&amp;showmsg=1'>gnu</a>/<a href='/guix/log/gnu/system?id=78b3727b6030715aef69a999f97a5d8e673a89db&amp;showmsg=1'>system</a>/<a href='/guix/log/gnu/system/keyboard.scm?id=78b3727b6030715aef69a999f97a5d8e673a89db&amp;showmsg=1'>keyboard.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/system/keyboard.scm?id=78b3727b6030715aef69a999f97a5d8e673a89db'>Collapse</a>)</th><th class='left'>Author</th></tr>
<tr class='logheader'><td><span title='2020-04-06 00:14:13 +0200'>2020-04-06</span></td><td class='logsubject'><a href='/guix/commit/gnu/system/keyboard.scm?id=2729cb406d9f3e9eb22cc660f887138134edb3a8'>system: Allow for comma-separated keyboard layouts.</a></td><td>Ludovic Courtès</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
Reported by Florian Pelz &lt;pelzflorian@pelzflorian.de&gt;.

* gnu/bootloader/grub.scm (keyboard-layout-file): Replace commas with
hyphens in the first argument to 'computed-file'.
* gnu/system/keyboard.scm (keyboard-layout-&gt;console-keymap): Likewise.
* doc/guix.texi (Keyboard Layout): Add example.


</td></tr>
<tr class='logheader'><td><span title='2019-03-24 23:06:11 +0100'>2019-03-24</span></td><td class='logsubject'><a href='/guix/commit/gnu/system/keyboard.scm?id=db1e2522f6222594fc507ce7a7ba7b1c0ac5037d'>Add (gnu system keyboard).</a></td><td>Ludovic Courtès</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* gnu/system/keyboard.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
* gnu.scm (%public-modules): Add it.


</td></tr>