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);
}
public VersionCompositeComparator(VersionCompositeComparator comparator)
{
_comparators.AddRange(comparator);
_compositor = comparator._compositor;
_originalString = comparator._originalString;
}
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 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);
}
}
