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Completing demo
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Lines changed: 130 additions & 70 deletions

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‎demo/ReadText.Demo/Options.cs‎

Lines changed: 47 additions & 44 deletions
Original file line numberDiff line numberDiff line change
@@ -1,45 +1,48 @@
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using System;
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using CommandLine;
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namespace ReadText.Demo
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{
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abstract class Options
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{
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[Option('q', "quiet",
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HelpText = "Supresses summary messages.")]
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public bool Quiet { get; set; }
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[Value(0)]
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public string FileName { get; set; }
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}
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[Verb("head", HelpText = "Displays first lines of a file.")]
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class HeadOptions : Options
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{
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[Option('n', "lines",
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DefaultValue = 10,
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SetName = "amount",
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HelpText = "Lines to be printed from the beginning of the file (default 10).")]
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public uint Lines { get; set; }
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[Option('c', "bytes",
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SetName = "amount",
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HelpText = "Bytes to be printed from the beginning of the file.")]
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public uint Bytes { get; set; }
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}
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[Verb("tail", HelpText = "Displays last lines of a file.")]
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class TailOptions : Options
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{
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[Option('n', "lines",
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DefaultValue = 10,
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SetName = "amount",
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HelpText = "Lines to be printed from the end of the file (default 10).")]
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public uint Lines { get; set; }
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[Option('c', "bytes",
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SetName = "amount",
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HelpText = "Bytes to be printed from the end of the file.")]
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public uint Bytes { get; set; }
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}
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using CommandLine;
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namespace ReadText.Demo
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{
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interface IOptions
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{
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[Option('n', "lines",
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SetName = "amount",
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HelpText = "Lines to be printed from the beginning or end of the file.")]
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uint? Lines { get; set; }
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[Option('c', "bytes",
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SetName = "amount",
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HelpText = "Bytes to be printed from the beginning or end of the file.")]
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uint? Bytes { get; set; }
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[Option('q', "quiet",
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HelpText = "Supresses summary messages.")]
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bool Quiet { get; set; }
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[Value(0)]
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string FileName { get; set; }
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}
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[Verb("head", HelpText = "Displays first lines of a file.")]
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class HeadOptions : IOptions
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{
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public uint? Lines { get; set; }
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public uint? Bytes { get; set; }
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public bool Quiet { get; set; }
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public string FileName { get; set; }
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}
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[Verb("tail", HelpText = "Displays last lines of a file.")]
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class TailOptions : IOptions
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{
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public uint? Lines { get; set; }
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public uint? Bytes { get; set; }
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public bool Quiet { get; set; }
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public string FileName { get; set; }
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}
4548
}

‎demo/ReadText.Demo/Program.cs‎

Lines changed: 73 additions & 26 deletions
Original file line numberDiff line numberDiff line change
@@ -1,26 +1,73 @@
1-
using System;
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using System.Collections.Generic;
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using System.Linq;
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using CommandLine;
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using CommandLine.Text;
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namespace ReadText.Demo
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{
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class Program
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{
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public static void Main(string[] args)
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{
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var result = Parser.Default.ParseArguments<HeadOptions, TailOptions>(args);
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if (result.Errors.Count() > 0)
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{
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Environment.Exit(1);
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}
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if (result.Value.GetType () == typeof(HeadOptions))
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{
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}
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// TODO: complete...
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}
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}
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}
1+
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Text;
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using CommandLine;
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using CommandLine.Text;
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namespace ReadText.Demo
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{
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class Program
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{
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public static int Main(string[] args)
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{
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Func<IOptions, string> reader = opts =>
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{
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var fromTop = opts.GetType() == typeof(HeadOptions);
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return opts.Lines.HasValue
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? ReadLines(opts.FileName, fromTop, (int)opts.Lines)
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: ReadBytes(opts.FileName, fromTop, (int)opts.Bytes);
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};
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Func<IOptions, string> header = opts =>
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{
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if (opts.Quiet)
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{
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return string.Empty;
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}
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var fromTop = opts.GetType() == typeof(HeadOptions);
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var builder = new StringBuilder("Reading ");
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builder = opts.Lines.HasValue
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? builder.Append(opts.Lines).Append(" lines")
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: builder.Append(opts.Bytes).Append(" bytes");
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builder = fromTop ? builder.Append(" from top") : builder.Append(" from bottom:");
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return builder.ToString();
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};
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var result = Parser.Default.ParseArguments<HeadOptions, TailOptions>(args);
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var texts = result
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.Return(
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(HeadOptions opts) => Tuple.Create(header(opts), reader(opts)),
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(TailOptions opts) => Tuple.Create(header(opts), reader(opts)),
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_ => Tuple.Create(string.Empty, string.Empty));
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if (texts.Item1.Length > 0)
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{
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Console.WriteLine(texts.Item1);
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}
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Console.WriteLine(texts.Item2);
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return 0;
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}
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private static string ReadLines(string fileName, bool fromTop, int count)
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{
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var lines = File.ReadAllLines(fileName);
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if (fromTop)
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{
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return string.Join(Environment.NewLine, lines.Take(count));
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}
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return string.Join(Environment.NewLine, lines.Reverse().Take(count));
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}
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private static string ReadBytes(string fileName, bool fromTop, int count)
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{
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var bytes = File.ReadAllBytes(fileName);
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if (fromTop)
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{
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return Encoding.UTF8.GetString(bytes, 0, count);
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}
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return Encoding.UTF8.GetString(bytes, bytes.Length - count, count);
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}
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}
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}

‎demo/ReadText.Demo/ReadText.Demo.csproj‎

Lines changed: 6 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -29,6 +29,9 @@
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<Externalconsole>true</Externalconsole>
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</PropertyGroup>
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<ItemGroup>
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<Reference Include="CommandLine">
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<HintPath>packages\CommandLineParser.2.0.47-alpha\lib\net40\CommandLine.dll</HintPath>
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</Reference>
3235
<Reference Include="System" />
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<Reference Include="System.Core" />
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</ItemGroup>
@@ -40,5 +43,8 @@
4043
<Compile Include="Properties\AssemblyInfo.cs" />
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<Compile Include="Options.cs" />
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</ItemGroup>
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<ItemGroup>
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<None Include="packages.config" />
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</ItemGroup>
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<Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
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</Project>

‎demo/ReadText.Demo/packages.config‎

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,4 @@
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<?xml version="1.0" encoding="utf-8"?>
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<packages>
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<package id="CommandLineParser" version="2.0.47-alpha" targetFramework="net40" />
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</packages>

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