show git branch + commit. +link to preview git changes (#2186)

* show git branch + commit.  +link to preview git changes

new feature
- bottom of upgrade screen shows git branch + commit you are on
- provides a link to github showing changes since then on your current branch

More eyes reviewing the code is always a plus.  The github link helps make it easier.

* Update index.php

Add translations and pretty it up a little.

core/upgrade/index.php

@@ -65,10 +65,10 @@
 						$update_failed = false;
 					}
 					
-                    			if (substr_count($response_line, "error") > 0) {
+					if (substr_count($response_line, "error") > 0) {
 						$update_failed = true;
 						break;
-					}					
+					}
 				}
 			}
 			if ($update_failed) {
@@ -144,7 +144,23 @@
 		echo "		".$text['label-upgrade_source'];
 		echo "	</td>\n";
 		echo "	<td width='70%' class='vtable' style='height: 50px;'>\n";
-		echo "		<input type='checkbox' name='do[source]' id='do_source' value='1'> &nbsp;".$text['description-upgrade_source']."\n";
+		echo "		<input type='checkbox' name='do[source]' id='do_source' value='1'> &nbsp;".$text['description-upgrade_source']."<br />\n";
+
+		// show current git version info
+		chdir($_SERVER["PROJECT_ROOT"]);
+		exec("git rev-parse --abbrev-ref HEAD 2>&1", $git_current_branch, $branch_return_value);
+		$git_current_branch = $git_current_branch[0];
+		exec("git log --pretty=format:'%H' -n 1 2>&1", $git_current_commit, $commit_return_value);
+		$git_current_commit = $git_current_commit[0];
+		if (($branch_return_value == 0) && ($commit_return_value == 0)) {
+			echo $text['label-git_branch'].' '.$git_current_branch." \n";
+			//echo $text['label-git_commit'].' '." ";
+			echo "<a href='https://github.com/fusionpbx/fusionpbx/compare/";
+			echo $git_current_commit . "..." . "$git_current_branch' target='_blank'> \n";
+			echo $git_current_commit . "</a><br />\n";
+			echo "</a>";
+		}
+
 		echo "	</td>\n";
 		echo "</tr>\n";
 		echo "</table>\n";
@@ -251,6 +267,7 @@
 		echo $_SESSION["schema"]["response"];
 		unset($_SESSION["schema"]["response"]);
 	}
+	echo "<br><br>";
 
 //include the footer
 	require_once "resources/footer.php";