private static bool TryParseByHyphen(string value, out VersionComparator lowerBound, out VersionComparator upperBound)
{
lowerBound = null;
upperBound = null;
var seperator = " - ";
var hyphenIndex = value.IndexOf(seperator, StringComparison.Ordinal);
if (hyphenIndex == -1)
{
seperator = "-";
if (value.EndsWith(seperator))
{
hyphenIndex = value.Length - 1;
}
else if (value.StartsWith(seperator))
{
hyphenIndex = 0;
}
}
if (hyphenIndex == -1)
{
return(false);
}
var lowerBoundString = value.Substring(0, hyphenIndex).Trim();
var upperBoundString = value.Substring(hyphenIndex + seperator.Length).Trim();
if (!string.IsNullOrWhiteSpace(lowerBoundString))
{
if (!VersionComparator.TryParse(lowerBoundString, VersionOperator.GreaterThanEqual, out lowerBound))
{
return(false);
}
lowerBound._originalString = null;
}
if (!string.IsNullOrWhiteSpace(upperBoundString))
{
if (!VersionComparator.TryParse(upperBoundString, VersionOperator.LessThanEqual, out upperBound))
{
return(false);
}
upperBound._originalString = null;
}
return(true);
}
private static bool TryParseSection(string value, out IVersionComparator comparator)
{
comparator = null;
if (string.IsNullOrEmpty(value))
{
return(false);
}
if (value == "*")
{
comparator = new VersionComparator(new Version(0, 0, 0), VersionFloatBehavior.Major, value);
return(true);
}
VersionComparator lowerBound, upperBound;
if (TryParseByBrakets(value, out lowerBound, out upperBound) || TryParseByHyphen(value, out lowerBound, out upperBound))
{
if (lowerBound == null && upperBound == null)
{
return(false);
}
if (lowerBound == null || upperBound == null)
{
comparator = lowerBound ?? upperBound;
return(true);
}
comparator = new VersionCompositeComparator(new IVersionComparator[] { lowerBound, upperBound }, VersionCompositor.And, value);
return(true);
}
if (TryParseByTilde(value, out comparator) || TryParseByCaret(value, out comparator))
{
return(true);
}
VersionComparator versionComparator;
if (VersionComparator.TryParse(value, out versionComparator))
{
comparator = versionComparator;
return(true);
}
return(false);
}
private static bool TryParseByTilde(string value, out IVersionComparator comparator)
{
comparator = null;
if (value[0] != '~')
{
return(false);
}
var versionString = value.Substring(1);
if (string.IsNullOrWhiteSpace(versionString))
{
return(false);
}
var hyphenIndex = versionString.IndexOf("-", StringComparison.Ordinal);
var realVersion = hyphenIndex == -1 ? versionString : versionString.Substring(0, hyphenIndex);
if (hyphenIndex == -1)
{
var parts = realVersion.Split('.');
if (parts.Length >= 3)
{
VersionComparator lowerBound;
if (!VersionComparator.TryParse(realVersion, VersionOperator.GreaterThanEqual, out lowerBound))
{
return(false);
}
lowerBound._originalString = null;
var upperBound = new VersionComparator(new Version(lowerBound.Version.Major, lowerBound.Version.Minor, 0), VersionFloatBehavior.Patch,
VersionOperator.LessThanEqual);
comparator = new VersionCompositeComparator(new IVersionComparator[] { lowerBound, upperBound }, VersionCompositor.And, value);
}
else
{
VersionComparator versionComparator;
if (!VersionComparator.TryParse(realVersion + ".*", out versionComparator))
{
return(false);
}
versionComparator._originalString = value;
comparator = versionComparator;
}
return(true);
}
else
{
Version version;
if (!Version.TryParse(versionString, out version))
{
return(false);
}
var releaseComparator = new VersionCompositeComparator(
new VersionComparator(version, VersionOperator.GreaterThanEqual),
new VersionComparator(new Version(version.Major, version.Minor, version.Patch, version.Revision),
VersionOperator.LessThan));
IVersionComparator versionComparator;
if (TryParseByTilde("~" + realVersion, out versionComparator))
{
comparator = new VersionCompositeComparator(new[] { releaseComparator, versionComparator }, VersionCompositor.Or, value);
return(true);
}
return(false);
}
}
private static bool TryParseByCaret(string value, out IVersionComparator comparator)
{
comparator = null;
if (value[0] != '^')
{
return(false);
}
var versionString = value.Substring(1);
if (string.IsNullOrEmpty(versionString))
{
return(false);
}
var hyphenIndex = versionString.IndexOf("-", StringComparison.Ordinal);
var realVersion = hyphenIndex == -1 ? versionString : versionString.Substring(0, hyphenIndex);
var parts = realVersion.Split('.');
var major = parts.Length > 0 ? parts[0] : null;
var minor = parts.Length > 1 ? parts[1] : null;
var patch = parts.Length > 2 ? parts[2] : null;
var revision = parts.Length > 3 ? parts[3] : null;
if (hyphenIndex == -1)
{
VersionComparator lowerBound, upperBound = null;
if (!VersionComparator.TryParse(realVersion, VersionOperator.GreaterThanEqual, out lowerBound))
{
return(false);
}
lowerBound._originalString = null;
if (!string.IsNullOrEmpty(major) && (major != "0" || string.IsNullOrEmpty(minor) || minor == "x" || minor == "*"))
{
upperBound = new VersionComparator(new Version(lowerBound.Version.Major, 0, 0), VersionFloatBehavior.Minor, VersionOperator.LessThanEqual);
}
else if (!string.IsNullOrEmpty(minor) && (minor != "0" || string.IsNullOrEmpty(patch) || patch == "x" || patch == "*"))
{
upperBound = new VersionComparator(new Version(lowerBound.Version.Major, lowerBound.Version.Minor, 0), VersionFloatBehavior.Patch,
VersionOperator.LessThanEqual);
}
else if (!string.IsNullOrEmpty(patch) && (patch != "0" || string.IsNullOrEmpty(revision) || revision == "x" || revision == "*"))
{
upperBound = new VersionComparator(new Version(lowerBound.Version.Major, lowerBound.Version.Minor, lowerBound.Version.Patch),
VersionFloatBehavior.Revision, VersionOperator.LessThanEqual);
}
else if (!string.IsNullOrEmpty(revision))
{
comparator = new VersionComparator(lowerBound.Version);
return(true);
}
if (upperBound != null)
{
comparator = new VersionCompositeComparator(lowerBound, upperBound);
return(true);
}
}
else
{
Version version;
if (!Version.TryParse(versionString, out version))
{
return(false);
}
var releaseComparator = new VersionCompositeComparator(
new VersionComparator(version, VersionOperator.GreaterThanEqual),
new VersionComparator(new Version(version.Major, version.Minor, version.Patch, version.Revision),
VersionOperator.LessThan));
IVersionComparator versionComparator;
if (TryParseByCaret("^" + realVersion, out versionComparator))
{
comparator = new VersionCompositeComparator(new[] { releaseComparator, versionComparator }, VersionCompositor.Or, value);
return(true);
}
}
return(false);
}
private static bool TryParseByBrakets(string value, out VersionComparator lowerBound, out VersionComparator upperBound)
{
lowerBound = null;
upperBound = null;
if (value[0] != '(' && value[0] != '[')
{
return(false);
}
bool isMinInclusive, isMaxInclusive;
// The first character must be [ to (
switch (value[0])
{
case '[':
isMinInclusive = true;
break;
case '(':
isMinInclusive = false;
break;
default:
return(false);
}
// The last character must be ] ot )
switch (value[value.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
var parts = value.Split(',');
if (parts.Length > 2)
{
return(false);
}
// If all parts are empty, then neither of upper or lower bounds were specified. Version spec is of the format (,]
if (parts.All(string.IsNullOrEmpty))
{
return(false);
}
var lowerBoundString = parts[0];
var upperBoundString = (parts.Length == 2) ? parts[1] : parts[0];
if (!string.IsNullOrWhiteSpace(lowerBoundString))
{
if (!VersionComparator.TryParse(lowerBoundString, isMinInclusive ? VersionOperator.GreaterThanEqual : VersionOperator.GreaterThan, out lowerBound))
{
return(false);
}
lowerBound._originalString = null;
}
if (!string.IsNullOrWhiteSpace(upperBoundString))
{
if (!VersionComparator.TryParse(upperBoundString, isMaxInclusive ? VersionOperator.LessThanEqual : VersionOperator.LessThan, out upperBound))
{
return(false);
}
upperBound._originalString = null;
}
return(true);
}
