XpandPosh

2.4.0

Cmdlets/src/XpandPosh.Cmdlets/ResolveAssemblyDependencies/Resolve-AssemblyDependencies.cs

                                using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Management.Automation;

using System.Reflection;

using System.Runtime.InteropServices;

namespace XpandPosh.Cmdlets.ResolveAssemblyDependencies{

    [Cmdlet(VerbsDiagnostic.Resolve, "AssemblyDependencies")]

    [CmdletBinding]

    public class ResolveAssemblyDependencies : PSCmdlet{

        [Parameter(Mandatory = true,Position = 0)]

        public string AssemblyFile{ get; set; }

        [Parameter(Position = 3)]

        public SwitchParameter SkipGAC{ get; set; }

        [Parameter(Position = 2)]

        public string[] Locations{ get; set; }=new string[0];

        protected override void ProcessRecord(){

            base.ProcessRecord();

            var sources = Locations.Concat(new[]{Path.GetDirectoryName(AssemblyFile)}).ToArray();

            Assembly ResolveEventHandler(object sender, ResolveEventArgs args){

                var name = args.Name;

                var indexOf = name.IndexOf(",", StringComparison.Ordinal);

                if (indexOf > 0) name = args.Name.Substring(0, indexOf);

                foreach (var location in sources){

                    var path = $"{Path.Combine(location, name)}.dll";

                    if (File.Exists(path)) return Assembly.LoadFile(path);

                }

                return null;

            }

            AppDomain.CurrentDomain.AssemblyResolve += ResolveEventHandler;

            Resolve();

            AppDomain.CurrentDomain.AssemblyResolve -= ResolveEventHandler;

        }

        private void Resolve(){

            var references = new HashSet<string>();

            var pending = new Queue<AssemblyName>();

            var file = Assembly.LoadFile(AssemblyFile);

            WriteObject(file);

            pending.Enqueue(file.GetName());

            while (pending.Count > 0){

                var assemblyName = pending.Dequeue();

                var value = assemblyName.ToString();

                if (references.Contains(value)){

                    continue;

                }

                references.Add(value);

                try{

                    var assembly = Assembly.Load(assemblyName);

                    if (assembly != null){

                        WriteObject(assembly);

                        foreach (var sub in assembly.GetReferencedAssemblies()){

                            pending.Enqueue(sub);

                        }

                        foreach (var type in assembly.GetTypes()){

                            foreach (var method in type.GetMethods(BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic)){

                                var customAttribute = (DllImportAttribute) Attribute.GetCustomAttribute(method, typeof(DllImportAttribute));

                                if (customAttribute != null && !references.Contains(customAttribute.Value)){

                                    references.Add(customAttribute.Value);

                                }

                            }

                        }

                    }

                }

                catch (Exception ex){

                    WriteError(new ErrorRecord(ex, ex.GetHashCode().ToString(), ErrorCategory.InvalidOperation,assemblyName.ToString()));

                }

            }

        }

    }

}