/// <summary>
/// Parses the bebop config file and assigns entries to their corresponding commandline flag.
/// </summary>
/// <param name="flagStore">A <see cref="CommandLineFlags"/> instance.</param>
/// <param name="configPath">The fully qualified path to the bebop config file, or null to trigger searching.</param>
/// <returns>true if the config could be parsed without error, otherwise false.</returns>
private static bool TryParseConfig(CommandLineFlags flagStore, string?configPath = null)
{
configPath ??= FindBebopConfig();
if (string.IsNullOrWhiteSpace(configPath))
{
return(false);
}
if (!new FileInfo(configPath).Exists)
{
return(false);
}
using var doc = JsonDocument.Parse(File.ReadAllText(configPath));
var root = doc.RootElement;
if (root.TryGetProperty("inputFiles", out var inputFileElement))
{
flagStore.SchemaFiles = new List <string>(inputFileElement.GetArrayLength());
foreach (var fileElement in inputFileElement.EnumerateArray())
{
if (fileElement.GetString() is not {
} filePath)
{
continue;
}
flagStore.SchemaFiles.Add(filePath);
}
}
if (root.TryGetProperty("inputDirectory", out var inputDirectoryElement))
{
flagStore.SchemaDirectory = inputDirectoryElement.GetString();
}
if (root.TryGetProperty("generators", out var generatorsElement))
{
foreach (var generatorElement in generatorsElement.EnumerateArray())
{
if (generatorElement.TryGetProperty("alias", out var aliasElement) &&
generatorElement.TryGetProperty("destinationPath", out var destinationElement))
{
foreach (var flagAttribute in GetFlagAttributes()
.Where(flagAttribute => flagAttribute.Attribute.IsGeneratorFlag &&
flagAttribute.Attribute.Name.Equals(aliasElement.GetString())))
{
flagAttribute.Property.SetValue(flagStore, destinationElement.GetString());
}
}
}
}
return(true);
}
private static async Task <int> Main()
{
Log.Formatter = CommandLineFlags.FindLogFormatter(Environment.GetCommandLineArgs());
if (!CommandLineFlags.TryParse(Environment.GetCommandLineArgs(), out _flags, out var message))
{
await Log.Error(new CompilerException(message));
return(1);
}
if (_flags.Version)
{
await Lager.StandardOut($"{ReservedWords.CompilerName} {VersionInfo.Informational}");
return(0);
}
if (_flags.Help)
{
await WriteHelpText();
return(0);
}
if (_flags.CheckSchemaFile is not null)
{
if (string.IsNullOrWhiteSpace(_flags.CheckSchemaFile))
{
await Log.Error(new CompilerException("No textual schema was read from standard input."));
return(1);
}
return(await CheckSchema(_flags.CheckSchemaFile));
}
if (_flags.CheckSchemaFiles is not null)
{
if (_flags.CheckSchemaFiles.Count > 0)
{
return(await CheckSchemas(_flags.CheckSchemaFiles));
}
await Log.Error(new CompilerException("No schemas specified in check."));
return(1);
}
if (!_flags.GetParsedGenerators().Any())
{
await Log.Error(new CompilerException("No code generators were specified."));
return(1);
}
if (_flags.SchemaDirectory is not null && _flags.SchemaFiles is not null)
{
await Log.Error(
new CompilerException("Can't specify both an input directory and individual input files"));
return(1);
}
List <string> paths;
if (_flags.SchemaDirectory is not null)
{
paths = new DirectoryInfo(_flags.SchemaDirectory !)
.GetFiles($"*.{ReservedWords.SchemaExt}", SearchOption.AllDirectories)
.Select(f => f.FullName)
.ToList();
}
else if (_flags.SchemaFiles is not null)
{
paths = _flags.SchemaFiles;
}
else
{
await Log.Error(new CompilerException("Specify one or more input files with --dir or --files."));
return(1);
}
if (paths.Count == 0)
{
await Log.Error(new CompilerException("No input files were found at the specified target location."));
return(1);
}
foreach (var parsedGenerator in _flags.GetParsedGenerators())
{
if (!GeneratorUtils.ImplementedGenerators.ContainsKey(parsedGenerator.Alias))
{
await Log.Error(new CompilerException($"'{parsedGenerator.Alias}' is not a recognized code generator"));
return(1);
}
if (string.IsNullOrWhiteSpace(parsedGenerator.OutputFile))
{
await Log.Error(new CompilerException("No output file was specified."));
return(1);
}
var result = await CompileSchema(GeneratorUtils.ImplementedGenerators[parsedGenerator.Alias], paths, new FileInfo(parsedGenerator.OutputFile), _flags.Namespace ?? "");
if (result != Ok)
{
return(result);
}
}
return(Ok);
}
/// <summary>
/// Attempts to parse commandline flags into a <see cref="CommandLineFlags"/> instance
/// </summary>
/// <param name="args">the array of arguments to parse</param>
/// <param name="flagStore">An instance which contains all parsed flags and their values</param>
/// <param name="errorMessage">A human-friendly message describing why parsing failed.</param>
/// <returns>
/// If the provided
/// <param name="args"></param>
/// were parsed this method returns true.
/// </returns>
public static bool TryParse(string[] args, out CommandLineFlags flagStore, out string errorMessage)
{
errorMessage = string.Empty;
var props = GetFlagAttributes();
var stringBuilder = new IndentedStringBuilder();
stringBuilder.AppendLine("Usage:");
stringBuilder.Indent(4);
foreach (var prop in props.Where(prop => !string.IsNullOrWhiteSpace(prop.Attribute.UsageExample)))
{
stringBuilder.AppendLine($"{ReservedWords.CompilerName} {prop.Attribute.UsageExample}");
}
stringBuilder.Dedent(4);
stringBuilder.AppendLine(string.Empty);
stringBuilder.AppendLine(string.Empty);
stringBuilder.AppendLine("Options:");
stringBuilder.Indent(4);
foreach (var prop in props)
{
stringBuilder.AppendLine($"--{prop.Attribute.Name} {prop.Attribute.HelpText}");
}
flagStore = new CommandLineFlags(stringBuilder.ToString());
var parsedFlags = GetFlags(args);
if (parsedFlags.Count == 0)
{
if (TryParseConfig(flagStore))
{
return(true);
}
errorMessage = "No commandline flags found.";
return(false);
}
if (parsedFlags.ContainsKey("config"))
{
var configPath = parsedFlags["config"];
if (string.IsNullOrWhiteSpace(configPath))
{
configPath = null;
}
return(TryParseConfig(flagStore, configPath));
}
if (parsedFlags.ContainsKey("help"))
{
flagStore.Help = true;
return(true);
}
if (parsedFlags.ContainsKey("version"))
{
flagStore.Version = true;
return(true);
}
foreach (var flag in props)
{
if (!parsedFlags.ContainsKey(flag.Attribute.Name))
{
continue;
}
var parsedValue = parsedFlags[flag.Attribute.Name]?.Trim();
var propertyType = flag.Property.PropertyType;
if (flag.Attribute.Name.Equals("check-schema"))
{
using var reader = new StreamReader(Console.OpenStandardInput());
flagStore.CheckSchemaFile = reader.ReadToEnd();
continue;
}
if (propertyType == typeof(bool))
{
flag.Property.SetValue(flagStore, true);
continue;
}
if (string.IsNullOrWhiteSpace(parsedValue))
{
errorMessage = $"Commandline flag '{flag.Attribute.Name}' was not assigned a value.";
return(false);
}
if (propertyType.IsGenericType && propertyType.GetGenericTypeDefinition() == typeof(List <>))
{
Type itemType = propertyType.GetGenericArguments()[0];
if (!(Activator.CreateInstance(typeof(List <>).MakeGenericType(itemType)) is IList genericList))
{
errorMessage = $"Failed to activate '{flag.Property.Name}'.";
return(false);
}
foreach (var item in parsedValue.Split(" ",
StringSplitOptions.TrimEntries | StringSplitOptions.RemoveEmptyEntries))
{
genericList.Add(Convert.ChangeType(item.Trim(), itemType));
}
flag.Property.SetValue(flagStore, genericList, null);
}
else if (propertyType.IsEnum)
{
if (!Enum.TryParse(propertyType, parsedValue, true, out var parsedEnum))
{
errorMessage = $"Failed to parse '{parsedValue}' into a member of '{propertyType}'.";
return(false);
}
flag.Property.SetValue(flagStore, parsedEnum, null);
}
else
{
flag.Property.SetValue(flagStore, Convert.ChangeType(parsedValue, flag.Property.PropertyType),
null);
}
}
errorMessage = string.Empty;
return(true);
}