A drop in file to add core CLI functionality to your projects.
/* Try this command line:
* foo.txt bar.txt /output foobar.cs /id 5860F36D-6207-47F9-9909-62F2B403BBA8 /ips 192.168.0.104 192.168.0.200 /ifstale /count 5 /enum static /indices 5 6 7 8
*/
static partial class Program
{
[CmdArg(Ordinal = 0,Required =true,Description ="The input files")]
public static TextReader[] Inputs = null;
[CmdArg("output",Description = "The output file. Defaults to <stdout>")]
public static TextWriter Output = Console.Out;
[CmdArg("id", Description = "The guid id", ItemName = "guid")]
public static Guid Id = Guid.Empty;
[CmdArg("ips", Description = "The ip addesses", ItemName = "address")]
public static List<IPAddress> Ips = new List<IPAddress>() { IPAddress.Any };
[CmdArg("ifstale", Description = "Only regenerate if input has changed")]
public static bool IfStale = false;
[CmdArg("width", Description = "The width to wrap to", ItemName = "chars")]
public static int Width = Console.WindowWidth/2;
[CmdArg("enum", Description = "The binding flags", ItemName = "flag")]
public static List<BindingFlags> Enum = null;
[CmdArg("indices", Description = "The indices", ItemName = "index")]
public static List<int> Indices = null;
static void Run()
{
Console.Error.Write("Progress test: ");
for (int i = 0; i < 10; ++i)
{
WriteProgress(i, i > 0, Console.Error);
Thread.Sleep(100);
}
Console.Error.WriteLine();
Console.Error.Write("Progress bar test: ");
for (int i = 0; i <= 100; ++i)
{
WriteProgressBar(i, i > 0, Console.Error);
Thread.Sleep(10);
}
Console.Error.WriteLine();
// use our Inputs and Output
// will be closed on exit
var first = true;
foreach (var input in Inputs) {
if (!first)
{
Output.WriteLine();
}
else { first = false; }
Output.Write(WordWrap(input.ReadToEnd(), Width, 0));
}
}
}That will parse arguments into those fields. It accepts strings, collections, arrays and bool switches, or anything TypeConverter can convert, or that has a static Parse() method that takes a string.
There is also a WordWrap() function that will wrap text, PrintUsage() will print the usage screen, and IsStale() will check if a file doesn't exist or another file is newer. There is WriteProgress() which writes an indeterminate progress indicator and WriteProgressBar() which writes a progress bar.
Here is a complete CLI app (using Program.Base.cs) that will word wrap text to the specified width
using System;
using System.Collections.Generic;
using System.IO;
internal partial class Program
{
// you don't need this field, but if you have it
// you can control the exit code. The warning
// is disabled because the compiler doesn't know
// that the field is being reflected upon.
#pragma warning disable CS0414
private static int ExitCode = 0;
#pragma warning restore
[CmdArg(Ordinal = 0)] // the description and itemname are filled
static List<TextReader> Inputs = new List<TextReader>() { Console.In };
[CmdArg(Name = "output")] // the description and itemname are filled
static TextWriter Output = Console.Out;
[CmdArg(Name = "width", Description = "The width to wrap. Defaults based on console window size", ItemName = "columns")]
static int Width = (int)Math.Floor((double)Console.WindowWidth / 1.5);
[CmdArg(Name = "ifstale", Description = "Skip if the input file is older than the output file")]
static bool IfStale = false;
static void Run()
{
if (!IfStale || IsStale(Inputs, Output))
{
foreach (var input in Inputs)
{
// do this because stdin requires it
string line;
while((line = input.ReadLine()) != null)
{
Output.WriteLine(WordWrap(line, Width));
}
}
} else
{
Console.Error.WriteLine("Skipped execution because the inputs did not change");
ExitCode = 1;
}
}
}This application presents the following using screen (on Windows):
wrap v1.0
word wraps input
Usage: wrap [{<infile1> <infileN>}] [/ifstale] [/output <outfile>] [/width <columns>]
<infile> The output files - defaults to <stdin>
<ifstale> Skip if the input file is older than the output file
<outfile> The output file - defaults to <stdout>
<columns> The width to wrap. Defaults based on console window size
- or -
/help Displays this screen and exits
and like this on other operating systems
wrap v1.0
word wraps input
Usage: wrap [{<infile1> <infileN>}] [--ifstale] [--output <outfile>] [--width <columns>]
<infile> The output files - defaults to <stdin>
<ifstale> Skip if the input file is older than the output file
<outfile> The output file - defaults to <stdout>
<columns> The width to wrap. Defaults based on console window size
- or -
--help Displays this screen and exits
That's all built for you from the above. Note the automatic file management.