public static bool MatchesRequirements(PackageInfo packageInfo)
{
var properties = packageInfo.Properties;
string netFrameworkVersion;
if (properties.ContainsKey(PropertyKeyNetFrameworkVersion))
netFrameworkVersion = properties[PropertyKeyNetFrameworkVersion];
else
netFrameworkVersion = "4.0";
if (!NetFrameworkVersionDetermination.IsVersionInstalled(netFrameworkVersion))
return false;
return true;
}
/// <summary>
/// Create a package info from a single line.
/// </summary>
/// <param name="line">The line to parse.</param>
/// <param name="lineNumber">The line number (1-based; the first line has line number 1).</param>
/// <returns>The package info parsed from that line.</returns>
/// <exception cref="InvalidOperationException">Occurs if the line is not properly formatted.</exception>
public static PackageInfo FromLine(string line, int lineNumber)
{
line = line.Trim();
var entries = line.Split(new char[] { '\t' }, StringSplitOptions.None);
if (entries.Length < 4)
throw new InvalidOperationException(string.Format("Line number {0} of the package info file doesn't contain at least 4 words, separated by tabulators", lineNumber));
PackageInfo result = new PackageInfo();
bool isUnstableVersion;
if (!IsValidStableIdentifier(entries[0].Trim(), out isUnstableVersion))
throw new InvalidOperationException(string.Format("First item in line number {0} of the package info file is neither 'stable' nor 'unstable'", lineNumber));
result.IsUnstableVersion = isUnstableVersion;
result.Version = new Version(entries[1].Trim());
result.FileLength = long.Parse(entries[2].Trim());
result.Hash = entries[3].Trim();
// All other entries should be in the form PropertyName = PropertyValue
for (int i = 4; i < entries.Length; ++i)
{
var pv = entries[i].Split(new char[] { '=' }, 2);
if (pv.Length != 2)
throw new InvalidOperationException(string.Format("Line number {0} of the package info file contains an ill formated property in column {1}: {2}", lineNumber, i + 1, entries[i]));
string key = pv[0].Trim();
string val = pv[1].Trim();
if (string.IsNullOrEmpty(key) || string.IsNullOrEmpty(val))
throw new InvalidOperationException(string.Format("Line number {0} of the package info file contains an ill formated property in column {1}: {2}", lineNumber, i + 1, entries[i]));
result.Properties[key] = val;
}
if (lineNumber > 1 && !result.Properties.ContainsKey(SystemRequirements.PropertyKeyNetFrameworkVersion))
throw new InvalidOperationException(string.Format("Line number {0} of the package info file does not contain the mandatory property {1}", lineNumber, SystemRequirements.PropertyKeyNetFrameworkVersion));
return result;
}
public static PackageInfo GetHighestVersion(PackageInfo[] packageInfos)
{
// from all parsed versions, choose that one that matches the requirements
PackageInfo parsedVersion = null;
for (int i = packageInfos.Length - 1; i >= 0; --i) // from higher indices to lower indices in order to download the most advanced version that can be used by this system
{
if (SystemRequirements.MatchesRequirements(packageInfos[i]))
{
parsedVersion = packageInfos[i];
break;
}
}
return parsedVersion;
}