Fix app fetcher php comparison to allow wider ranges

When app app specifies php 7.4 as upper limit we have to allow the
installation on php>7.4.0. The previous version check didn't do that.
This adjusts the regexes to discard any irrelevant suffix after the
three version numbers so that we can use more fine granular checks than
php's version_compare can do out of the box, like for php 7.4 we only
compare the major and minor version numbers and ignore the patch level.

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

1 files changed, 15 insertions, 10 deletions

diff --git a/lib/private/App/CompareVersion.php b/lib/private/App/CompareVersion.php
index 5d38d4c358e..9df28a457ff 100644
--- a/lib/private/App/CompareVersion.php
+++ b/lib/private/App/CompareVersion.php
@@ -1,4 +1,7 @@
 <?php
+
+declare(strict_types=1);
+
 /**
  * @copyright 2018 Christoph Wurst <christoph@winzerhof-wurst.at>
  *
@@ -24,12 +27,13 @@
 namespace OC\App;
 
 use InvalidArgumentException;
+use function explode;
 
 class CompareVersion {
-	public const REGEX_MAJOR = '/^\d+$/';
-	public const REGEX_MAJOR_MINOR = '/^\d+.\d+$/';
-	public const REGEX_MAJOR_MINOR_PATCH = '/^\d+.\d+.\d+$/';
-	public const REGEX_SERVER = '/^\d+.\d+.\d+(.\d+)?$/';
+	private const REGEX_MAJOR = '/^\d+$/';
+	private const REGEX_MAJOR_MINOR = '/^\d+\.\d+$/';
+	private const REGEX_MAJOR_MINOR_PATCH = '/^\d+\.\d+\.\d+(?!\.\d+)/';
+	private const REGEX_ACTUAL = '/^\d+(\.\d+){1,2}/';
 
 	/**
 	 * Checks if the given server version fulfills the given (app) version requirements.
@@ -45,18 +49,19 @@ class CompareVersion {
 	 */
 	public function isCompatible(string $actual, string $required,
 		string $comparator = '>='): bool {
-		if (!preg_match(self::REGEX_SERVER, $actual)) {
-			throw new InvalidArgumentException('server version is invalid');
+		if (!preg_match(self::REGEX_ACTUAL, $actual, $matches)) {
+			throw new InvalidArgumentException("version specification $actual is invalid");
 		}
+		$cleanActual = $matches[0];
 
 		if (preg_match(self::REGEX_MAJOR, $required) === 1) {
-			return $this->compareMajor($actual, $required, $comparator);
+			return $this->compareMajor($cleanActual, $required, $comparator);
 		} elseif (preg_match(self::REGEX_MAJOR_MINOR, $required) === 1) {
-			return $this->compareMajorMinor($actual, $required, $comparator);
+			return $this->compareMajorMinor($cleanActual, $required, $comparator);
 		} elseif (preg_match(self::REGEX_MAJOR_MINOR_PATCH, $required) === 1) {
-			return $this->compareMajorMinorPatch($actual, $required, $comparator);
+			return $this->compareMajorMinorPatch($cleanActual, $required, $comparator);
 		} else {
-			throw new InvalidArgumentException('required version is invalid');
+			throw new InvalidArgumentException("required version $required is invalid");
 		}
 	}