/// <summary>
/// Parses an editor config file text located at the given path. No parsing
/// errors are reported. If any line contains a parse error, it is dropped.
/// </summary>
public static AnalyzerConfig Parse(SourceText text, string?pathToFile)
{
if (pathToFile is null || !Path.IsPathRooted(pathToFile) || string.IsNullOrEmpty(Path.GetFileName(pathToFile)))
{
throw new ArgumentException("Must be an absolute path to an editorconfig file", nameof(pathToFile));
}
Section?globalSection = null;
var namedSectionBuilder = ImmutableArray.CreateBuilder <Section>();
// N.B. The editorconfig documentation is quite loose on property interpretation.
// Specifically, it says:
// Currently all properties and values are case-insensitive.
// They are lowercased when parsed.
// To accommodate this, we use a lower case Unicode mapping when adding to the
// dictionary, but we also use a case-insensitive key comparer when doing lookups
var activeSectionProperties = ImmutableDictionary.CreateBuilder <string, string>(
Section.PropertiesKeyComparer);
string activeSectionName = "";
foreach (var textLine in text.Lines)
{
string line = textLine.ToString();
if (string.IsNullOrWhiteSpace(line))
{
continue;
}
if (IsComment(line))
{
continue;
}
var sectionMatches = s_sectionMatcher.Matches(line);
if (sectionMatches.Count > 0 && sectionMatches[0].Groups.Count > 0)
{
addNewSection();
var sectionName = sectionMatches[0].Groups[1].Value;
Debug.Assert(!string.IsNullOrEmpty(sectionName));
activeSectionName = sectionName;
activeSectionProperties = ImmutableDictionary.CreateBuilder <string, string>(
Section.PropertiesKeyComparer);
continue;
}
var propMatches = s_propertyMatcher.Matches(line);
if (propMatches.Count > 0 && propMatches[0].Groups.Count > 1)
{
var key = propMatches[0].Groups[1].Value;
var value = propMatches[0].Groups[2].Value;
Debug.Assert(!string.IsNullOrEmpty(key));
Debug.Assert(key == key.Trim());
Debug.Assert(value == value?.Trim());
key = CaseInsensitiveComparison.ToLower(key);
if (ReservedKeys.Contains(key) || ReservedValues.Contains(value))
{
value = CaseInsensitiveComparison.ToLower(value);
}
activeSectionProperties[key] = value ?? "";
continue;
}
}
// Add the last section
addNewSection();
return(new AnalyzerConfig(globalSection !, namedSectionBuilder.ToImmutable(), pathToFile));
void addNewSection()
{
// Close out the previous section
var previousSection = new Section(activeSectionName, activeSectionProperties.ToImmutable());
if (activeSectionName == "")
{
// This is the global section
globalSection = previousSection;
}
else
{
namedSectionBuilder.Add(previousSection);
}
}
}
internal static bool Equals(string lhs, string rhs)
{
return(CaseInsensitiveComparison.Equals(lhs, rhs));
}