1 files changed, 122 insertions, 0 deletions
diff --git a/plugins/jetpack/jetpack_vendor/automattic/jetpack-assets/src/class-semver.php b/plugins/jetpack/jetpack_vendor/automattic/jetpack-assets/src/class-semver.php
new file mode 100644
index 00000000..5a5c6591
--- /dev/null
+++ b/plugins/jetpack/jetpack_vendor/automattic/jetpack-assets/src/class-semver.php
@@ -0,0 +1,122 @@
+<?php
+/**
+ * Simple semver version handling.
+ *
+ * We use this instead of something like `composer/semver` to avoid
+ * plugins needing to include yet-another dependency package. The
+ * amount of code we need here is pretty small.
+ *
+ * We use this instead of PHP's `version_compare()` because that doesn't
+ * handle prerelease versions in the way anyone other than PHP devs would
+ * expect, and silently breaks on various unexpected input.
+ *
+ * @package automattic/jetpack-assets
+ */
+
+namespace Automattic\Jetpack\Assets;
+
+use InvalidArgumentException;
+
+/**
+ * Simple semver version handling.
+ */
+class Semver {
+	/**
+	 * Parse a semver version.
+	 *
+	 * @param string $version Version.
+	 * @return array With components:
+	 *  - major: (int) Major version.
+	 *  - minor: (int) Minor version.
+	 *  - patch: (int) Patch version.
+	 *  - version: (string) Major.minor.patch.
+	 *  - prerelease: (string|null) Pre-release string.
+	 *  - buildinfo: (string|null) Build metadata string.
+	 * @throws InvalidArgumentException If the version number is not in a recognized format.
+	 */
+	public static function parse( $version ) {
+		// This is slightly looser than the official version from semver.org, in that leading zeros are allowed.
+		if ( ! preg_match( '/^(?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(?:-(?P<prerelease>(?:[0-9a-zA-Z-]+)(?:\.(?:[0-9a-zA-Z-]+))*))?(?:\+(?P<buildinfo>[0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*))?$/', $version, $m ) ) {
+			throw new InvalidArgumentException( "Version number \"$version\" is not in a recognized format." );
+		}
+		$info = array(
+			'major'      => (int) $m['major'],
+			'minor'      => (int) $m['minor'],
+			'patch'      => (int) $m['patch'],
+			'version'    => sprintf( '%d.%d.%d', $m['major'], $m['minor'], $m['patch'] ),
+			'prerelease' => isset( $m['prerelease'] ) && '' !== $m['prerelease'] ? $m['prerelease'] : null,
+			'buildinfo'  => isset( $m['buildinfo'] ) && '' !== $m['buildinfo'] ? $m['buildinfo'] : null,
+		);
+
+		if ( null !== $info['prerelease'] ) {
+			$sep        = '';
+			$prerelease = '';
+			foreach ( explode( '.', $info['prerelease'] ) as $part ) {
+				if ( ctype_digit( $part ) ) {
+					$part = (int) $part;
+				}
+				$prerelease .= $sep . $part;
+				$sep         = '.';
+			}
+			$info['prerelease'] = $prerelease;
+		}
+
+		return $info;
+	}
+
+	/**
+	 * Compare two version numbers.
+	 *
+	 * @param string $a First version.
+	 * @param string $b Second version.
+	 * @return int Less than, equal to, or greater than 0 depending on whether `$a` is less than, equal to, or greater than `$b`.
+	 * @throws InvalidArgumentException If the version numbers are not in a recognized format.
+	 */
+	public static function compare( $a, $b ) {
+		$aa = self::parse( $a );
+		$bb = self::parse( $b );
+		if ( $aa['major'] !== $bb['major'] ) {
+			return $aa['major'] - $bb['major'];
+		}
+		if ( $aa['minor'] !== $bb['minor'] ) {
+			return $aa['minor'] - $bb['minor'];
+		}
+		if ( $aa['patch'] !== $bb['patch'] ) {
+			return $aa['patch'] - $bb['patch'];
+		}
+
+		if ( null === $aa['prerelease'] ) {
+			return null === $bb['prerelease'] ? 0 : 1;
+		}
+		if ( null === $bb['prerelease'] ) {
+			return -1;
+		}
+
+		$aaa = explode( '.', $aa['prerelease'] );
+		$bbb = explode( '.', $bb['prerelease'] );
+		$al  = count( $aaa );
+		$bl  = count( $bbb );
+		for ( $i = 0; $i < $al && $i < $bl; $i++ ) {
+			$a = $aaa[ $i ];
+			$b = $bbb[ $i ];
+			if ( ctype_digit( $a ) ) {
+				if ( ctype_digit( $b ) ) {
+					if ( (int) $a !== (int) $b ) {
+						return $a - $b;
+					}
+				} else {
+					return -1;
+				}
+			} elseif ( ctype_digit( $b ) ) {
+				return 1;
+			} else {
+				$tmp = strcmp( $a, $b );
+				if ( 0 !== $tmp ) {
+					return $tmp;
+				}
+			}
+		}
+		return $al - $bl;
+	}
+
+}