static void Main(string[] raws)
{
var cwd = new DirectoryInfo(".");
var args = raws.Select(arg => new Arg {
arg = arg, cwd = cwd
}).ToList();
var text = "";
while (!args.Empty())
{
var arg = args.Pop();
switch (arg.option)
{
// include arguments from external file
case "args":
{
var filename = args.Pop().arg;
var path = Path.Combine(arg.cwd.FullName, filename);
var file = new FileInfo(path);
using (var tr = file.OpenText())
{
args.Push(tr.Lines().Select(line => new Arg {
arg = line, cwd = file.Directory
}));
}
break;
}
// include files matching a given pattern
case "f": // current directory only
case "s": // recursive
{
var pathAndPattern = args.Pop().arg;
var path = Path.Combine(arg.cwd.FullName, pathAndPattern);
var dir = new DirectoryInfo(Path.GetDirectoryName(path));
var pattern = Path.GetFileName(path);
text = dir.EnumerateFiles(pattern, arg.option == "f" ? SearchOption.TopDirectoryOnly : SearchOption.AllDirectories).Aggregate(text, (current, file) => current + file.All());
break;
}
// perform a regular expression replace operation
case "re":
{
var regex = new Regex(args.Pop().arg);
var replace = args.Pop().arg.Replace("\\n", "\n").Replace("\\t", "\t").Replace("\\\\", "\\");
text = regex.Replace(text, replace);
break;
}
// keep performing a regular expression replace operation until the buffer stops changing
case "rei":
{
var regex = new Regex(args.Pop().arg);
var replace = args.Pop().arg.Replace("\\n", "\n").Replace("\\t", "\t").Replace("\\\\", "\\");
var was = text;
for (var i = 0; i < 1000; i++)
{
text = regex.Replace(text, replace);
if (was == text)
{
break;
}
was = text;
}
break;
}
// run the buffer through an xsl transform
case "xsl":
{
var filename = Path.Combine(arg.cwd.FullName, args.Pop().arg);
var xsl = new XslCompiledTransform();
xsl.Load(filename);
var xr = XmlReader.Create(new StringReader(text));
var sb = new StringBuilder();
var xw = new StringWriter(sb);
xsl.Transform(xr, null, xw);
text = sb.ToString();
break;
}
// output text buffer
case "o":
{
var file = args.Pop().arg;
if (file == "-")
{
Console.Out.Write(text);
}
else
{
using (var tw = new FileInfo(Path.Combine(arg.cwd.FullName, file)).CreateText())
{
tw.Write(text);
tw.Flush();
tw.Close();
}
}
text = "";
break;
}
default:
{
Syntax();
return;
}
}
}
if (text != "")
{
Console.Out.Write(text);
}
}