From be58b36a351e827ae2c77250f7c598f43e33255b Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Mon, 12 Jul 2021 15:50:02 +0200
Subject: [PATCH] Also look up 7zz on linux/macOS, fixes #9951

---
 src/Composer/Command/DiagnoseCommand.php  | 10 ++++++++--
 src/Composer/Downloader/ZipDownloader.php |  3 +++
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/Composer/Command/DiagnoseCommand.php b/src/Composer/Command/DiagnoseCommand.php
index f0bab63a7c35..415b6d7b23c5 100644
--- a/src/Composer/Command/DiagnoseCommand.php
+++ b/src/Composer/Command/DiagnoseCommand.php
@@ -177,12 +177,18 @@ protected function execute(InputInterface $input, OutputInterface $output)
 
         $finder = new ExecutableFinder;
         $hasSystemUnzip = (bool) $finder->find('unzip');
-        $hasSystem7zip = (bool) $finder->find('7z', null, array('C:\Program Files\7-Zip'));
+        $bin7zip = '';
+        if ($hasSystem7zip = (bool) $finder->find('7z', null, array('C:\Program Files\7-Zip'))) {
+            $bin7zip = '7z';
+        }
+        if (!Platform::isWindows() && !$hasSystem7zip && $hasSystem7zip = (bool) $finder->find('7zz')) {
+            $bin7zip = '7zz';
+        }
 
         $io->write(
             'zip: ' . (extension_loaded('zip') ? '<comment>extension present</comment>' : '<comment>extension not loaded</comment>')
             . ', ' . ($hasSystemUnzip ? '<comment>unzip present</comment>' : '<comment>unzip not available</comment>')
-            . ', ' . ($hasSystem7zip ? '<comment>7-Zip present</comment>' : '<comment>7-Zip not available</comment>')
+            . ', ' . ($hasSystem7zip ? '<comment>7-Zip present ('.$bin7zip.')</comment>' : '<comment>7-Zip not available</comment>')
         );
 
         return $this->exitCode;
diff --git a/src/Composer/Downloader/ZipDownloader.php b/src/Composer/Downloader/ZipDownloader.php
index fd0b93a4a155..06f33347ce96 100644
--- a/src/Composer/Downloader/ZipDownloader.php
+++ b/src/Composer/Downloader/ZipDownloader.php
@@ -49,6 +49,9 @@ public function download(PackageInterface $package, $path, PackageInterface $pre
             if (!Platform::isWindows() && ($cmd = $finder->find('7z'))) { // 7z linux/macOS support is only used if unzip is not present
                 self::$unzipCommands[] = array('7z', ProcessExecutor::escape($cmd).' x -bb0 -y %s -o%s');
             }
+            if (!Platform::isWindows() && ($cmd = $finder->find('7zz'))) { // 7zz linux/macOS support is only used if unzip is not present
+                self::$unzipCommands[] = array('7zz', ProcessExecutor::escape($cmd).' x -bb0 -y %s -o%s');
+            }
         }
 
         if (null === self::$hasZipArchive) {