tryParse static method

SemVer? tryParse(String version)

Parse a version string into a SemVer.

Supports formats like "1.2.3", "1.2.3-beta.1", "1.2.3+sha123". Returns null if the string cannot be parsed.

Implementation

static SemVer? tryParse(String version) {
  // Coerce: strip leading non-numeric characters (like 'v')
  var v = version.trim();
  if (v.startsWith('v') || v.startsWith('V')) {
    v = v.substring(1);
  }

  // Split off build metadata
  String? build;
  final plusIdx = v.indexOf('+');
  if (plusIdx >= 0) {
    build = v.substring(plusIdx + 1);
    v = v.substring(0, plusIdx);
  }

  // Split off pre-release
  String? pre;
  final dashIdx = v.indexOf('-');
  if (dashIdx >= 0) {
    pre = v.substring(dashIdx + 1);
    v = v.substring(0, dashIdx);
  }

  final parts = v.split('.');
  if (parts.length < 3) {
    // Try to coerce: pad missing parts with 0
    while (parts.length < 3) {
      parts.add('0');
    }
  }

  final major = int.tryParse(parts[0]);
  final minor = int.tryParse(parts[1]);
  final patch = int.tryParse(parts[2]);

  if (major == null || minor == null || patch == null) return null;

  return SemVer(
    major: major,
    minor: minor,
    patch: patch,
    preRelease: pre,
    buildMetadata: build,
  );
}