Merge pull request #171 from danepowell/issue-148-1.x

Fixes #148: Incompatible with Git 2.14+.

src/Patches.php

@@ -368,10 +368,22 @@ protected function getAndApplyPatch(RemoteFilesystem $downloader, $install_path,
     // it might be useful. p4 is useful for Magento 2 patches
     $patch_levels = array('-p1', '-p0', '-p2', '-p4');
     foreach ($patch_levels as $patch_level) {
-      $checked = $this->executeCommand('cd %s && git --git-dir=. apply --check %s %s', $install_path, $patch_level, $filename);
+      if ($this->io->isVerbose()) {
+        $comment = 'Testing ability to patch with git apply.';
+        $comment .= ' This command may produce errors that can be safely ignored.';
+        $this->io->write('<comment>' . $comment . '</comment>');
+      }
+      $checked = $this->executeCommand('git -C %s apply --check -v %s %s', $install_path, $patch_level, $filename);
+      $output = $this->executor->getErrorOutput();
+      if (substr($output, 0, 7) == 'Skipped') {
+        // Git will indicate success but silently skip patches in some scenarios.
+        //
+        // @see https://github.com/cweagans/composer-patches/pull/165
+        $checked = false;
+      }
       if ($checked) {
         // Apply the first successful style.
-        $patched = $this->executeCommand('cd %s && git --git-dir=. apply %s %s', $install_path, $patch_level, $filename);
+        $patched = $this->executeCommand('git -C %s apply %s %s', $install_path, $patch_level, $filename);
         break;
       }
     }