/// <summary>
/// Parses a VersionRange from its string representation.
/// </summary>
public static bool TryParse(string value, bool allowFloating, out VersionRange versionRange)
{
if (value == null)
{
throw new ArgumentNullException("value");
}
versionRange = null;
value = value.Trim();
char[] charArray = value.ToCharArray();
// * is the only range below 3 chars
if (allowFloating && charArray.Length == 1 && charArray[0] == '*')
{
versionRange = AllStableFloating;
return(true);
}
// Fail early if the string is too short to be valid
if (charArray.Length < 3)
{
return(false);
}
string minVersionString = null;
string maxVersionString = null;
bool isMinInclusive = false;
bool isMaxInclusive = false;
NuGetVersion minVersion = null;
NuGetVersion maxVersion = null;
FloatRange floatRange = null;
if (charArray[0] == '(' || charArray[0] == '[')
{
// The first character must be [ to (
switch (charArray[0])
{
case '[':
isMinInclusive = true;
break;
case '(':
isMinInclusive = false;
break;
default:
return(false);
}
// The last character must be ] ot )
switch (charArray[charArray.Length - 1])
{
case ']':
isMaxInclusive = true;
break;
case ')':
isMaxInclusive = false;
break;
default:
return(false);
}
// Get rid of the two brackets
value = value.Substring(1, value.Length - 2);
// Split by comma, and make sure we don't get more than two pieces
string[] parts = value.Split(',');
if (parts.Length > 2)
{
return(false);
}
else if (parts.All(String.IsNullOrEmpty))
{
// If all parts are empty, then neither of upper or lower bounds were specified. Version spec is of the format (,]
return(false);
}
// If there is only one piece, we use it for both min and max
minVersionString = parts[0];
maxVersionString = (parts.Length == 2) ? parts[1] : parts[0];
}
else
{
// default to min inclusive when there are no braces
isMinInclusive = true;
// use the entire value as the version
minVersionString = value;
}
if (!String.IsNullOrWhiteSpace(minVersionString))
{
// parse the min version string
if (allowFloating && minVersionString.Contains("*"))
{
// single floating version
if (FloatRange.TryParse(minVersionString, out floatRange) && floatRange.HasMinVersion)
{
minVersion = floatRange.MinVersion;
}
else
{
// invalid float
return(false);
}
}
else
{
// single non-floating version
if (!NuGetVersion.TryParse(minVersionString, out minVersion))
{
// invalid version
return(false);
}
}
}
// parse the max version string, the max cannot float
if (!String.IsNullOrWhiteSpace(maxVersionString))
{
if (!NuGetVersion.TryParse(maxVersionString, out maxVersion))
{
// invalid version
return(false);
}
}
// Successful parse!
versionRange = new VersionRange(
minVersion: minVersion,
includeMinVersion: isMinInclusive,
maxVersion: maxVersion,
includeMaxVersion: isMaxInclusive,
includePrerelease: null,
floatRange: floatRange);
return(true);
}
/// <summary>
/// Parse a floating version into a FloatRange
/// </summary>
public static bool TryParse(string versionString, out FloatRange range)
{
range = null;
if (versionString != null)
{
int starPos = versionString.IndexOf('*');
string actualVersion = versionString;
string releasePrefix = string.Empty;
if (versionString.Length == 1 && starPos == 0)
{
range = new FloatRange(NuGetVersionFloatBehavior.Major, new NuGetVersion(new Version(0, 0)));
}
else if (starPos == versionString.Length - 1)
{
var behavior = NuGetVersionFloatBehavior.None;
actualVersion = versionString.Substring(0, versionString.Length - 1);
if (versionString.IndexOf('-') == -1)
{
// replace the * with a 0
actualVersion += "0";
int versionParts = actualVersion.Split('.').Length;
if (versionParts == 2)
{
behavior = NuGetVersionFloatBehavior.Minor;
}
else if (versionParts == 3)
{
behavior = NuGetVersionFloatBehavior.Patch;
}
else if (versionParts == 4)
{
behavior = NuGetVersionFloatBehavior.Revision;
}
}
else
{
behavior = NuGetVersionFloatBehavior.Prerelease;
// check for a prefix
if (versionString.IndexOf('-') == versionString.LastIndexOf('-'))
{
releasePrefix = actualVersion.Substring(versionString.LastIndexOf('-') + 1);
if (actualVersion.EndsWith("-"))
{
// remove the empty release label, the version will be release but
// the behavior will have to account for this
actualVersion += "-";
}
else if (actualVersion.EndsWith("."))
{
// ending with a . is not allowed
// TODO: solve this better
actualVersion += "0";
}
}
}
NuGetVersion version = null;
if (NuGetVersion.TryParse(actualVersion, out version))
{
// there is no float range for this version
range = new FloatRange(behavior, version, releasePrefix);
}
}
else
{
// normal version parse
NuGetVersion version = null;
if (NuGetVersion.TryParse(versionString, out version))
{
// there is no float range for this version
range = new FloatRange(NuGetVersionFloatBehavior.None, version);
}
}
}
return(range != null);
}
