MSBuilder/Introspect.cs at master · MobileEssentials/MSBuilder · GitHub

MSBuilder/Introspect.cs at master · MobileEssentials/MSBuilder · GitHubPermalink

using Microsoft.Build.Utilities; using System; using System.Linq; using System.Collections.Generic; using System.Reflection; using Microsoft.Build.Framework; using System.IO; using Microsoft.Build.Execution; using Microsoft.Build.Evaluation;

namespace MSBuilder { /// <summary> /// Introspects the current project properties and targets being built. /// </summary> public class Introspect : Task { /// <summary> /// Optional item type to retrieve via the Items output property, such as "Compile" or "Content". /// </summary> public string ItemType { get; set; }

/// <summary> /// If ItemType was provided, contains all the items with the given type. /// </summary> [Output] public Microsoft.Build.Framework.ITaskItem[] Items { get; set; }

/// <summary> /// Returns all current project properties as an item, with /// each property as an item metadata with its evaluated value. /// </summary> [Output] public Microsoft.Build.Framework.ITaskItem Properties { get; set; }

/// <summary> /// Returns all the global properties used when evaluating the /// project as an item, with each property as an item metadata /// with its evaluated value. /// </summary> [Output] public Microsoft.Build.Framework.ITaskItem GlobalProperties { get; set; }

/// <summary> /// Returns all current project targets being built as an item list. /// </summary> [Output] public Microsoft.Build.Framework.ITaskItem[] Targets { get; set; }

/// <summary> /// Introspects the current project and retrieves its /// properties and currently building targets. /// </summary> public override bool Execute() { ProjectInstance project; IEnumerable<object> targets;

var flags = BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public; var engineType = BuildEngine.GetType(); var callbackField = engineType.GetField("targetBuilderCallback", flags);

if (callbackField != null) { // .NET field naming convention. var callback = callbackField.GetValue(BuildEngine); var projectField = callback.GetType().GetField("projectInstance", flags); project = (ProjectInstance)projectField.GetValue(callback); var targetsField = callback.GetType().GetField("targetsToBuild", flags); targets = (IEnumerable<object>)targetsField.GetValue(callback); } else { callbackField = engineType.GetField("_targetBuilderCallback", flags); if (callbackField == null) throw new NotSupportedException("Failed to introspect current MSBuild Engine.");

// OSS field naming convention. var callback = callbackField.GetValue(BuildEngine); var projectField = callback.GetType().GetField("_projectInstance", flags); project = (ProjectInstance)projectField.GetValue(callback); var targetsField = callback.GetType().GetField("_targetsToBuild", flags); targets = (IEnumerable<object>)targetsField.GetValue(callback); }

if (string.IsNullOrEmpty(ItemType)) Items = new ITaskItem[0]; else Items = project.Items .Select(item => new TaskItem(item.EvaluatedInclude, item.Metadata.ToDictionary(meta => meta.Name, meta => meta.EvaluatedValue))) .ToArray();

Properties = new TaskItem(project.ProjectFileLocation.File, project.Properties.ToDictionary( prop => prop.Name, prop => prop.EvaluatedValue));

GlobalProperties = new TaskItem (project.ProjectFileLocation.File, project.GlobalProperties.ToDictionary( pair => pair.Key, pair => pair.Value));

if (targets.Any()) { var entryType = targets.First().GetType(); var nameField = entryType.GetProperty("Name", flags); Targets = targets .Select(entry => (string)nameField.GetValue(entry)) .Where(target => !project.InitialTargets.Contains(target)) .Select(target => new TaskItem(target)) .ToArray(); } else { Targets = new ITaskItem[0]; }

return true; } } }