Allow the configuration file to be specified via an environment variable.

diff --git a/src/gclue-config.c b/src/gclue-config.c
index 7ab2a67..e41f3df 100644
--- a/src/gclue-config.c
+++ b/src/gclue-config.c
@@ -332,6 +332,11 @@ static void
 gclue_config_init (GClueConfig *config)
 {
         GError *error = NULL;
+	const char *config_file_path;
+
+	config_file_path = g_getenv ("GEOCLUE_CONFIG_FILE");
+	if (!config_file_path)
+            config_file_path = CONFIG_FILE_PATH;
 
         config->priv = gclue_config_get_instance_private(config);
         config->priv->key_file = g_key_file_new ();
@@ -341,7 +346,7 @@ gclue_config_init (GClueConfig *config)
                                    &error);
         if (error != NULL) {
                 g_critical ("Failed to load configuration file '%s': %s",
-                            CONFIG_FILE_PATH, error->message);
+                            config_file_path, error->message);
                 g_error_free (error);
 
                 return;
'tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=fc2d2339644b408574f0ead4436e751fa423a7e6'>refs</a><a href='/guix/log/AUTHORS'>log</a><a class='active' href='/guix/tree/AUTHORS?id=fc2d2339644b408574f0ead4436e751fa423a7e6'>tree</a><a href='/guix/commit/AUTHORS?id=fc2d2339644b408574f0ead4436e751fa423a7e6'>commit</a><a href='/guix/diff/AUTHORS?id=fc2d2339644b408574f0ead4436e751fa423a7e6'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/AUTHORS'>
<input type='hidden' name='id' value='fc2d2339644b408574f0ead4436e751fa423a7e6'/><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/tree/?id=fc2d2339644b408574f0ead4436e751fa423a7e6'>root</a>/<a href='/guix/tree/AUTHORS?id=fc2d2339644b408574f0ead4436e751fa423a7e6'>AUTHORS</a></div><div class='content'>blob: 1e30a74a64f51ec735dcc44ff4dfe5fa4fa13c6f (<a href='/guix/about/AUTHORS?id=fc2d2339644b408574f0ead4436e751fa423a7e6'>about</a>) (<a href='/guix/plain/AUTHORS?id=fc2d2339644b408574f0ead4436e751fa423a7e6'>plain</a>)
<table summary='blob content' class='blob'>
<tr><td class='linenumbers'><pre><a id='n1' href='#n1'>1</a>
<a id='n2' href='#n2'>2</a>
<a id='n3' href='#n3'>3</a>
<a id='n4' href='#n4'>4</a>
<a id='n5' href='#n5'>5</a>
<a id='n6' href='#n6'>6</a>
<a id='n7' href='#n7'>7</a>
<a id='n8' href='#n8'>8</a>
<a id='n9' href='#n9'>9</a>
</pre></td>
<td class='lines'><pre><code>GNU Guix consists of Scheme code that implements the deployment model
of the Nix package management tool.  In fact, it currently talks to a
build daemon whose code comes from Nix (see the manual for details.)

Nix was initially written by Eelco Dolstra; other people have been
contributing to it.  See `nix/AUTHORS' for details.

The list of GNU Guix contributors is now generated from the output of
'git log' and written to this file, as can be seen in release tarballs.
</code></pre></td></tr></table>
</div> <!-- class=content -->
                         <div class=footer>generated by
                             <a href="https://git.zx2c4.com/cgit/about/">
                                 cgit
                             </a>
                         </div>
                        </div> <!-- id=cgit -->
</body>
</html>