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/* This plugin automatically merges and compresses CSS and JavaScript resources.
It needs configured cache directory, and also the minifier (
installed on this server (Debian/Ubuntu: apt-get install minify). */
// Warning: the minified file is put in place of the first non-minified file in
// the list of all CSS/JS resources.
// External files are not minified. Given resource list A, B, C, D, E, if B and
// D are local then result would be A, minified_B_D, C, E - if D depends on C
// then it will break.
// All minified files should use the same charset and strict mode (for JS).
namespace Kanbani;
if ($cache = $context->config["cache"]) {
$context->hooks->registerFirst("echo_empty", function (array &$vars) use ($cache) {
// $css
// $js
extract($vars, EXTR_REFS);
foreach (["css", "js"] as $var) {
$all = array_filter($$var, "is_file");
if ($all) { // keep only local files.
$latest = max(array_map("filemtime", $all));
$file = "$cache/".hash("sha1", join("*", $all)).".$latest.$var";
if (!is_file($file)) {
$temp = tempnam($cache, $var);
try {
// Not using $output because it can corrupt Unicode.
exec("minify -o".escapeshellarg($temp)." ".
join(" ", array_map("escapeshellarg", $all)),
$output, $code);
if (!$code && filesize($temp)) {
rename($temp, $file);
} finally {
try {
} catch (\Throwable $e) {}
if (is_file($file)) {
array_splice($$var, array_search($all[0], $$var), 1, [$file]);
$$var = array_diff($$var, $all);