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 )
db3e'>tree</a><a href='/guix/commit/gnu/system/images/pinebook-pro.scm?id=b51bb5bcdc93b4bf41bdbfa8be956a87613ddb3e'>commit</a><a href='/guix/diff/gnu/system/images/pinebook-pro.scm?id=b51bb5bcdc93b4bf41bdbfa8be956a87613ddb3e'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/system/images/pinebook-pro.scm'>
<input type='hidden' name='id' value='b51bb5bcdc93b4bf41bdbfa8be956a87613ddb3e'/><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=b51bb5bcdc93b4bf41bdbfa8be956a87613ddb3e&amp;showmsg=1'>root</a>/<a href='/guix/log/gnu?id=b51bb5bcdc93b4bf41bdbfa8be956a87613ddb3e&amp;showmsg=1'>gnu</a>/<a href='/guix/log/gnu/system?id=b51bb5bcdc93b4bf41bdbfa8be956a87613ddb3e&amp;showmsg=1'>system</a>/<a href='/guix/log/gnu/system/images?id=b51bb5bcdc93b4bf41bdbfa8be956a87613ddb3e&amp;showmsg=1'>images</a>/<a href='/guix/log/gnu/system/images/pinebook-pro.scm?id=b51bb5bcdc93b4bf41bdbfa8be956a87613ddb3e&amp;showmsg=1'>pinebook-pro.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/images/pinebook-pro.scm?id=b51bb5bcdc93b4bf41bdbfa8be956a87613ddb3e'>Collapse</a>)</th><th class='left'>Author</th></tr>
<tr class='logheader'><td><span title='2021-02-17 10:57:02 +0100'>2021-02-17</span></td><td class='logsubject'><a href='/guix/commit/gnu/system/images/pinebook-pro.scm?id=6e8cdf1d26092cb9654e179b04730fff7c15c94f'>scripts: system: Accept &lt;image&gt; records as input.</a></td><td>Mathieu Othacehe</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* guix/scripts/system.scm (system-derivation-for-action): Replace "os"
argument by "image". Remove "image-size", "image-type", "label" and
"volatile-root?"  arguments.
(perform-action): Ditto.
(process-action): Construct the &lt;image&gt; record and pass it to "perform-action"
procedure.
* tests/guix-system.sh: Adapt accordingly.
* gnu/system/images/hurd.scm: Return the default image.
* gnu/system/images/novena.scm: Ditto.
* gnu/system/images/pine64.scm: Ditto.
* gnu/system/images/pinebook-pro.scm Ditto.


</td></tr>
<tr class='logheader'><td><span title='2021-01-20 13:44:14 +0100'>2021-01-20</span></td><td class='logsubject'><a href='/guix/commit/gnu/system/images/pinebook-pro.scm?id=423653b4ad1b205541d0dbe02973717fd40be549'>images: pinebook-pro: Fix default serial port.</a></td><td>Caliph Nomble</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* gnu/system/images/pinebook-pro.scm (pinebook-pro-barebones-os)[services]:
Start agetty on ttyS2 instead of ttyS0.


</td></tr>
<tr class='logheader'><td><span title='2021-01-10 16:07:44 +0100'>2021-01-10</span></td><td class='logsubject'><a href='/guix/commit/gnu/system/images/pinebook-pro.scm?id=b6473e506e4161b539fe710fb1b3e69eaeac7069'>system: image: Fix root offset on rockchip platforms.</a></td><td>Mathieu Othacehe</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
Fixes: &lt;https://issues.guix.gnu.org/45584&gt;.

* gnu/system/image.scm (arm32-disk-image, arm64-disk-image): Turn into
procedures, taking the root partition offset as argument.
* gnu/system/images/novena.scm (novena-image-type): Adapt accordingly.
* gnu/system/images/pine64.scm (pine64-image-type): Ditto.
* gnu/system/images/pinebook-pro.scm (pinebook-pro-image-type): Use a 9MiB
offset for the root partition.


</td></tr>