public List <ImportedScript> Merge(IEnumerable <string> importPaths)
{
if (!importPaths.Any())
{
throw new InvalidOperationException("ImportMerger requires at least one path to import.");
}
// step 2
// merge the code in such a way that it can be parsed and interpreted (what a novel idea..)
// TODO: handle imports that cannot be read directly (maybe external libraries in the form of dlls or w/e)
var importedScripts = new List <ImportedScript>();
foreach (var importPath in importPaths)
{
var source = File.ReadAllText(importPath);
var reader = new ScriptReader(source, importPath);
var importLexer = new ImportLexer(reader, new CommonLexer(reader));
var afterImportsPosition = importLexer.GetIndexAfterImports();
var codeWithoutImports = source.Substring(afterImportsPosition);
var imported = new ImportedScript(importPath, codeWithoutImports, reader.Line);
importedScripts.Add(imported);
}
return(importedScripts);
}
public IEnumerable <string> ResolveImportsFromFile(string pathToMain)
{
// step 1
// read unique imports in code, add to list of new imports
// recurse through all new imports and look for new unique imports
// return an enumerable of unique imports
var fileInfo = new FileInfo(pathToMain);
var rootDirectory = fileInfo.DirectoryName;
var fileName = fileInfo.Name;
var check = new HashSet <string>();
var mainPath = ResolveImportPath(fileName.EndsWith(".ei") ? fileName : $"{fileName}.ei",
rootDirectory);
var allImports = new HashSet <string> {
mainPath
};
ResolveInner(mainPath);
void ResolveInner(string path)
{
if (check.Contains(path))
{
return;
}
check.Add(path);
var code = GetCode(path);
var reader = new ScriptReader(code, path);
var lexer = new ImportLexer(reader,
new CommonLexer(reader)); // maybe inject ImportResolver with a LexerFactory,
// not really necessary at this point I feel
var imports = lexer.GetImports();
foreach (var import in imports)
{
var canonicalized =
ResolveImportPath(import.EndsWith(".ei") ? import : $"{import}.ei", path);
allImports.Add(canonicalized);
ResolveInner(canonicalized);
}
}
return(allImports);
}
