/// <summary>
/// Parses a version string using loose semantic versioning rules that allows 2-4 version components followed by an optional special version.
/// </summary>
public static bool TryParse(string value, out NuGetVersion version)
{
version = null;
if (value != null)
{
Version systemVersion = null;
// trim the value before passing it in since we not strict here
Tuple<string, string[], string> sections = ParseSections(value.Trim());
// null indicates the string did not meet the rules
if (sections != null && !string.IsNullOrEmpty(sections.Item1))
{
string versionPart = sections.Item1;
if (versionPart.IndexOf('.') < 0)
{
// System.Version requires at least a 2 part version to parse.
versionPart += ".0";
}
if (Version.TryParse(versionPart, out systemVersion))
{
// labels
if (sections.Item2 != null && !sections.Item2.All(s => IsValidPart(s, false)))
{
return false;
}
// build metadata
if (sections.Item3 != null && !IsValid(sections.Item3, true))
{
return false;
}
Version ver = NormalizeVersionValue(systemVersion);
string originalVersion = value;
if (originalVersion.IndexOf(' ') > -1)
{
originalVersion = value.Replace(" ", "");
}
version = new NuGetVersion(version: ver,
releaseLabels: sections.Item2,
metadata: sections.Item3 ?? string.Empty,
originalVersion: originalVersion);
return true;
}
}
}
return false;
}
/// <summary>
/// Parses a version string using strict SemVer rules.
/// </summary>
public static bool TryParseStrict(string value, out NuGetVersion version)
{
version = null;
SemanticVersion semVer = null;
if (SemanticVersion.TryParse(value, out semVer))
{
version = new NuGetVersion(semVer.Major, semVer.Minor, semVer.Patch, 0, semVer.ReleaseLabels, semVer.Metadata);
}
return true;
}
/// <summary>
/// Compares the 4th digit of the version number.
/// </summary>
private static int CompareLegacyVersion(NuGetVersion legacyX, NuGetVersion legacyY)
{
int result = 0;
// true if one has a 4th version number
if (legacyX != null && legacyY != null)
{
result = legacyX.Version.CompareTo(legacyY.Version);
}
else if (legacyX != null && legacyX.Version.Revision > 0)
{
result = 1;
}
else if (legacyY != null && legacyY.Version.Revision > 0)
{
result = -1;
}
return result;
}
/// <summary>
/// Creates a NuGetVersion from an existing NuGetVersion
/// </summary>
public NuGetVersion(NuGetVersion version)
: this(version.Version, version.ReleaseLabels, version.Metadata, version.ToString())
{
}
/// <summary>
/// Creates a VersionRange with the given min and max.
/// </summary>
/// <param name="minVersion">Lower bound of the version range.</param>
/// <param name="includeMinVersion">True if minVersion satisfies the condition.</param>
/// <param name="maxVersion">Upper bound of the version range.</param>
/// <param name="includeMaxVersion">True if maxVersion satisfies the condition.</param>
/// <param name="includePrerelease">True if prerelease versions should satisfy the condition.</param>
/// <param name="floatRange">The floating range subset used to find the best version match.</param>
public VersionRange(NuGetVersion minVersion = null, bool includeMinVersion = true, NuGetVersion maxVersion = null,
bool includeMaxVersion = false, bool? includePrerelease = null, FloatRange floatRange =null)
: base(minVersion, includeMinVersion, maxVersion, includeMaxVersion, includePrerelease)
{
_floatRange = floatRange;
}
/// <summary>
/// Creates a range that is greater than or equal to the minVersion with the given float behavior.
/// </summary>
/// <param name="minVersion">Lower bound of the version range.</param>
public VersionRange(NuGetVersion minVersion, FloatRange floatRange)
: this(minVersion, true, null, false, null, floatRange)
{
}
/// <summary>
/// Determines if a given version is better suited to the range than a current version.
/// </summary>
public bool IsBetter(NuGetVersion current, NuGetVersion considering)
{
if (Object.ReferenceEquals(current, considering))
{
return false;
}
// null checks
if (Object.ReferenceEquals(considering, null))
{
return false;
}
if (!Satisfies(considering))
{
// keep null over a value outside of the range
return false;
}
if (Object.ReferenceEquals(current, null))
{
return true;
}
if (IsFloating)
{
// check if either version is in the floating range
bool curInRange = _floatRange.Satisfies(current);
bool conInRange = _floatRange.Satisfies(considering);
if (curInRange && !conInRange)
{
// take the version in the range
return false;
}
else if (conInRange && !curInRange)
{
// take the version in the range
return true;
}
else if (curInRange && conInRange)
{
// prefer the highest one if both are in the range
return current < considering;
}
else
{
// neither are in range
bool curToLower = current < _floatRange.MinVersion;
bool conToLower = considering < _floatRange.MinVersion;
if (curToLower && !conToLower)
{
// favor the version above the range
return true;
}
else if (!curToLower && conToLower)
{
// favor the version above the range
return false;
}
else if (!curToLower && !conToLower)
{
// favor the lower version if we are above the range
return current > considering;
}
else if (curToLower && conToLower)
{
// favor the higher version if we are below the range
return current < considering;
}
}
}
// Favor lower versions
return current > considering;
}
/// <summary>
/// Creates a range that is greater than or equal to the minVersion.
/// </summary>
/// <param name="minVersion">Lower bound of the version range.</param>
public VersionRange(NuGetVersion minVersion)
: this(minVersion, null)
{
}