48 lines
1.2 KiB
C#
48 lines
1.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using Microsoft.Build.Framework;
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using Microsoft.Build.Utilities;
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namespace ILLink.Tasks
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{
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public class FindDuplicatesByMetadata : Task
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{
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/// <summary>
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/// Items to scan.
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/// </summary>
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[Required]
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public ITaskItem [] Items { get; set; }
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/// <summary>
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/// Name of metadata to scan for.
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/// </summary>
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[Required]
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public String MetadataName { get; set; }
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/// <summary>
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/// Duplicate items: the input items for which the
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/// specified metadata was shared by multiple input
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/// items.
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/// </summary>
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[Output]
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public ITaskItem [] DuplicateItems { get; set; }
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/// <summary>
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/// Duplicate representatives: includes one input
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/// item from each set of duplicates.
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/// </summary>
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[Output]
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public ITaskItem [] DuplicateRepresentatives { get; set; }
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public override bool Execute ()
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{
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var duplicateGroups = Items.GroupBy (i => i.GetMetadata (MetadataName))
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.Where (g => g.Count () > 1);
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DuplicateItems = duplicateGroups.SelectMany (g => g).ToArray ();
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DuplicateRepresentatives = duplicateGroups.Select (g => g.First ()).ToArray ();
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return true;
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}
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}
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}
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