# -*- mode: snippet -*-
# name: guix-commit-message-update-package
# key: update
# condition: git-commit-mode
# --

gnu: ${1:`(with-temp-buffer
           (magit-git-wash #'magit-diff-wash-diffs
             "diff" "--staged")
           (goto-char (point-min))
           (when (re-search-forward "^[ ]*(define-public \\(\\S-+\\)" nil 'noerror)
             (match-string-no-properties 1)))`}: Update to ${2:`(with-temp-buffer
    (magit-git-wash #'magit-diff-wash-diffs
      "diff" "--staged")
    (goto-char (point-min))
    (search-forward "name" nil 'noerror)
    (search-forward "+" nil 'noerror)   ; first change
    (when (and (search-forward "version " nil 'noerror)
               (looking-at-p "\""))
      (let ((end (save-excursion (search-forward "\")" nil 'noerror))))
        (when end
          (forward-char)
          (buffer-substring-no-properties (point) (- end 2))))))`}.

* `(car (magit-staged-files))` ($1): Update to $2.$0
`(mapconcat (lambda (file) (concat "* " file)) (cdr (magit-staged-files)) "\n")`'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=4d08f984e93876bd205de0eddc3b82042a64aff6'>refs</a><a class='active' href='/guix/log/etc/guix-daemon.conf.in'>log</a><a href='/guix/tree/etc/guix-daemon.conf.in?id=4d08f984e93876bd205de0eddc3b82042a64aff6'>tree</a><a href='/guix/commit/etc/guix-daemon.conf.in?id=4d08f984e93876bd205de0eddc3b82042a64aff6'>commit</a><a href='/guix/diff/etc/guix-daemon.conf.in?id=4d08f984e93876bd205de0eddc3b82042a64aff6'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/etc/guix-daemon.conf.in'>
<input type='hidden' name='id' value='4d08f984e93876bd205de0eddc3b82042a64aff6'/><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=4d08f984e93876bd205de0eddc3b82042a64aff6'>root</a>/<a href='/guix/log/etc?id=4d08f984e93876bd205de0eddc3b82042a64aff6'>etc</a>/<a href='/guix/log/etc/guix-daemon.conf.in?id=4d08f984e93876bd205de0eddc3b82042a64aff6'>guix-daemon.conf.in</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/etc/guix-daemon.conf.in?id=4d08f984e93876bd205de0eddc3b82042a64aff6&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-07-07 23:54:20 -0400'>2021-07-07</span></td><td><a href='/guix/commit/etc/guix-daemon.conf.in?id=4cbe0127a668cbcc64087c5d311308b59d39b104'>guix-install.sh: Prompt for configuring substitutes discovery.</a><span class='msg-avail'>...<span class='msg-tooltip'>Also ensure prompt_yes_no always print the message with a trailing space,
which is more pleasing to the eye.

* etc/guix-daemon.conf.in &lt;--discover=no&gt;: New guix-daemon option.
* etc/guix-daemon.service.in: Likewise.
* etc/init.d/guix-daemon.in: Likewise.
* etc/openrc/guix-daemon.in: Likewise.
* etc/guix-install.sh (configure_substitute_discovery): New procedure.
(sys_enable_guix_daemon): Ask the user whether automatic substitute discovery
should be enabled.  Set the '--discover' argument accordingly.
(prompt_yes_no): Add a trailing space to the message.
(sys_authorize_build_farms): Remove trailing space from the message argument.
* NEWS (Distribution): Add news.
</span></span></td><td>Maxim Cournoyer</td></tr>