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