private static IValue GetStructureVersionHolder(this IVault vault)
{
// Load all possible version holders
var versionHolder1 = vault.GetValue("$version");
var versionHolder2 = vault.GetValue("$format");
var versionHolder3 = vault.GetValue("$structureversion");
// Get version token from the latest holder
var genuineHolder = versionHolder3 ?? versionHolder2 ?? versionHolder1;
genuineHolder = genuineHolder ?? vault.CreateValue("$structureversion");
var genuineVersion = genuineHolder.ContentString;
// Ensure that all kinds of version holders are present in the vault (backward compat!)
versionHolder1 = versionHolder1 ?? vault.GetOrCreateValue("$version");
versionHolder2 = versionHolder2 ?? vault.GetOrCreateValue("$format");
versionHolder3 = versionHolder3 ?? vault.GetOrCreateValue("$structureversion");
var allHolders = new [] { versionHolder1, versionHolder2, versionHolder3 };
// Now synchronize all version signatures across all holders
foreach (var anyVersionHolder in allHolders)
{
if (anyVersionHolder != null)
{
anyVersionHolder.SetContent(genuineVersion);
}
}
// Return only the latest holder
return(genuineHolder);
}
private static Expression Expand(VariableExpression vex, IVault vault, IVault repository, List<Expression> stack, Dictionary<String, IBranch> nodes)
{
var @ref = vault.GetBranch(vex.Name.FromElfIdentifier());
if (@ref == null)
{
throw new ReferencedBranchDoesNotExistException(vex.Name);
}
if (@ref.IsFov())
{
if (@ref.GetOrCreateValue("declarationType", "source").ContentString == "source")
{
String val;
if (repository == null)
{
val = @ref.GetValue("valueForTesting").ContentString;
}
else
{
var external = @ref.GetValue("repositoryValue").ContentString;
val = repository.GetValue(external).ContentString;
}
return new LiteralExpression(String.Format("[[{0}]]{1}", @ref.GetValue("type").ContentString, val));
}
else
{
return ExpandRhs(@ref, repository, stack, nodes);
}
}
else
{
var varName = @ref.VPath.ToElfIdentifier();
nodes[varName] = @ref;
return new VariableExpression(varName);
}
}
