# -*- 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")`ef='/guix/'>summary</a><a href='/guix/refs/?id=cf5ab2fbd74f3092dd99236514dec5484ad1edbf'>refs</a><a class='active' href='/guix/log/gnu/machine.scm'>log</a><a href='/guix/tree/gnu/machine.scm?id=cf5ab2fbd74f3092dd99236514dec5484ad1edbf'>tree</a><a href='/guix/commit/gnu/machine.scm?id=cf5ab2fbd74f3092dd99236514dec5484ad1edbf'>commit</a><a href='/guix/diff/gnu/machine.scm?id=cf5ab2fbd74f3092dd99236514dec5484ad1edbf'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/machine.scm'>
<input type='hidden' name='id' value='cf5ab2fbd74f3092dd99236514dec5484ad1edbf'/><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=cf5ab2fbd74f3092dd99236514dec5484ad1edbf'>root</a>/<a href='/guix/log/gnu?id=cf5ab2fbd74f3092dd99236514dec5484ad1edbf'>gnu</a>/<a href='/guix/log/gnu/machine.scm?id=cf5ab2fbd74f3092dd99236514dec5484ad1edbf'>machine.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/machine.scm?id=cf5ab2fbd74f3092dd99236514dec5484ad1edbf&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-02-08 13:34:02 +0100'>2022-02-08</span></td><td><a href='/guix/commit/gnu/machine.scm?id=ab7114191d4599e36958c2ec18491618bf0cc6a9'>gnu: Fix typo.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/machine.scm: Fix typo in top-level comment.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>jgart</td></tr>
<tr><td><span title='2020-07-25 19:11:36 +0200'>2020-07-25</span></td><td><a href='/guix/commit/gnu/machine.scm?id=a5e2fc73760a2ae023f2e56bdbf8025971f90e64'>utils: Move &lt;location&gt; and '&amp;error-location' to (guix diagnostics).</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/utils.scm (&lt;location&gt;, source-properties-&gt;location)
(location-&gt;source-properties, &amp;error-location): Move to...
* guix/diagnostics.scm: ... here.
* gnu.scm: Adjust imports accordingly.
* gnu/machine.scm: Likewise.
* gnu/system.scm: Likewise.
* gnu/tests.scm: Likewise.
* guix/inferior.scm: Likewise.
* tests/channels.scm: Likewise.
* tests/packages.scm: Likewise.
</span></span></td><td>Ludovic Courtès</td></tr>