private static string CleanYamlBeforeDeserialization(string yaml)
{
//Handle a null input
if (yaml == null)
{
yaml = "";
}
//Not well documented, but repo:self is redundent, and hence we remove it if detected (https://stackoverflow.com/questions/53860194/azure-devops-resources-repo-self)
yaml = yaml.Replace("- repo: self", "");
//Fix some variables that we can't use for property names because the "-" character is not allowed in c# properties, or it's a reserved word (e.g. if)
yaml = yaml.Replace("ref:", "_ref:");
//Handle condition variable insertion syntax. This is a bit ugly.
if (yaml.IndexOf("variables") >= 0)
{
StringBuilder processedYaml = new StringBuilder();
using (StringReader reader = new StringReader(yaml))
{
int variablesIndentLevel = 0;
bool scanningForVariables = false;
string line;
while ((line = reader.ReadLine()) != null)
{
//Find the lines with variables
if (line.IndexOf("variables:") >= 0)
{
//Start tracking variables and record the variables indent level
scanningForVariables = true;
variablesIndentLevel = ConversionUtility.CountSpacesBeforeText(line);
}
else if (scanningForVariables == true)
{
//While scanning for variables, get the indent level. It should be (variablesIndentLevel + 2), if it's more than that, we have a variable insert.
ConversionUtility.WriteLine("Scanning for vars: " + line, true);
int lineIndentLevel = ConversionUtility.CountSpacesBeforeText(line);
if ((variablesIndentLevel - (lineIndentLevel - 2)) == 0)
{
//If the line starts with a conditional insertation, then comment it out
if (line.Trim().StartsWith("${{") == true)
{
line = "#" + line;
}
}
else if (variablesIndentLevel - (lineIndentLevel - 2) <= 0)
{
//we found a variable insert and need to remove the first two spaces from the front of the variable
line = line.Substring(2, line.Length - 2);
}
else if (variablesIndentLevel - (lineIndentLevel - 2) >= 0) //we are done with variables, and back at the next root node
{
scanningForVariables = false;
}
}
processedYaml.AppendLine(line);
}
}
yaml = processedYaml.ToString();
}
return(yaml);
}