tye/src/Microsoft.Tye.Core/StandardOptions.cs

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using System;
using System.Collections.Generic;
using System.CommandLine;
using System.CommandLine.Parsing;
using System.IO;
using System.Linq;

namespace Microsoft.Tye
{
    public static class StandardOptions
    {
        private static readonly string[] AllOutputs = new string[] { "container", "chart", };

        public static Option Environment
        {
            get
            {
                return new Option(new[] { "-e", "--environment" }, "Environment")
                {
                    Argument = new Argument<string>("environment", () => "production")
                    {
                        Arity = ArgumentArity.ExactlyOne,
                    },
                    Required = false,
                };
            }
        }

        public static Option Force
        {
            get
            {
                return new Option("--force", "Force overwrite of existing files")
                {
                    Argument = new Argument<bool>(),
                };
            }
        }

        public static Option Interactive
        {
            get
            {
                return new Option(new[] { "-i", "--interactive", }, "Interactive mode")
                {
                    Argument = new Argument<bool>(),
                };
            }
        }

        public static Option Outputs
        {
            get
            {
                var argument = new Argument<List<string>>(TryConvert)
                {
                    Arity = ArgumentArity.ZeroOrMore,
                };
                argument.AddSuggestions(AllOutputs);
                argument.SetDefaultValue(new List<string>(AllOutputs));

                return new Option(new[] { "-o", "--outputs" }, "Outputs to generate")
                {
                    Argument = argument,
                };

                static bool TryConvert(SymbolResult symbol, out List<string> outputs)
                {
                    outputs = new List<string>();

                    foreach (var token in symbol.Tokens)
                    {
                        if (!AllOutputs.Any(item => string.Equals(item, token.Value, StringComparison.OrdinalIgnoreCase)))
                        {
                            symbol.ErrorMessage = $"output '{token.Value}' is not recognized";
                            outputs = default!;
                            return false;
                        }

                        outputs.Add(token.Value.ToLowerInvariant());
                    }

                    return true;
                }
            }
        }

        public static Option Project
        {
            get
            {

                var argument = new Argument<FileInfo>(TryParse, isDefault: true)
                {
                    Arity = ArgumentArity.ZeroOrOne,
                    Name = "project-file or solution-file or directory",
                };

                return new Option(new[] { "-p", "--project", }, "Project file, Solution file or directory")
                {
                    Argument = argument,
                };

                static bool TryFindProjectFile(string directoryPath, out string? projectFilePath, out string? errorMessage)
                {
                    var matches = new List<string>();
                    foreach (var candidate in Directory.EnumerateFiles(directoryPath))
                    {
                        if (Path.GetExtension(candidate).EndsWith(".sln"))
                        {
                            matches.Add(candidate);
                        }

                        if (Path.GetExtension(candidate).EndsWith(".csproj"))
                        {
                            matches.Add(candidate);
                        }
                    }

                    // Prefer solution if both are in the same directory. This helps
                    // avoid some conflicts.
                    if (matches.Any(m => m.EndsWith(".sln")))
                    {
                        matches.RemoveAll(m => m.EndsWith(".csproj"));
                    }

                    if (matches.Count == 0)
                    {
                        errorMessage = $"No project file or solution file was found in directory '{directoryPath}'.";
                        projectFilePath = default;
                        return false;
                    }
                    else if (matches.Count == 1)
                    {
                        errorMessage = null;
                        projectFilePath = matches[0];
                        return true;
                    }
                    else
                    {
                        errorMessage = $"More than one project file or solution file was found in directory '{directoryPath}'.";
                        projectFilePath = default;
                        return false;
                    }
                }

                static FileInfo TryParse(ArgumentResult result)
                {
                    var token = result.Tokens.Count switch
                    {
                        0 => ".",
                        1 => result.Tokens[0].Value,
                        _ => throw new InvalidOperationException("Unexpected token count."),
                    };

                    if (File.Exists(token))
                    {
                        return new FileInfo(token);
                    }

                    if (Directory.Exists(token))
                    {
                        if (TryFindProjectFile(token, out var filePath, out var errorMessage))
                        {
                            return new FileInfo(filePath);
                        }
                        else
                        {
                            result.ErrorMessage = errorMessage;
                            return default!;
                        }
                    }

                    result.ErrorMessage = $"The file '{token}' could not be found.";
                    return default!;
                }
            }
        }

        public static Option Verbosity
        {
            get
            {
                return new Option(new[] { "-v", "--verbosity" }, "Output verbosity")
                {
                    Argument = new Argument<Verbosity>("one of: quiet|info|debug", () => Tye.Verbosity.Info)
                    {
                        Arity = ArgumentArity.ExactlyOne,
                    },
                    Required = false,
                };
            }
        }
    }
}