Version

Represents a version in a format consisting of the following three components:

1. Dot-separated version number of infinite length (ex. 1.0.0.0.0.1, 1.0.0, 1, etc.). Individual components must be non-negative integers and cannot contain leading zeros, except for 0 itself.

2. Optional pre-release stage (any of snapshot, alpha, beta, rc (ignoring capitalization)), separated by a dash from the main version number and followed by an optional pre-release version number as in (1). (ex. 1.0.0-alpha, 1.0.0-beta.1.2.3)

3. Optional metadata, separated by a plus sign from the main version number. Metadata consists of one or multiple dot-separated identifiers, which themselves are non-empty alphanumeric strings. (ex. 1.0.0+build.123, 1.0.0+build.123+build.456)

When comparing version numbers, the dot-separated components of version numbers are compared individually, such that 1.11 > 1.2 and no pre-release stage > rc > beta > alpha > snapshot. Metadata is ignored when comparing versions.

This class loosely follows the SemVer specification, but allows variable-length version numbers and restricts the pre-release stages to snapshot, alpha, beta and rc.