Credits screen: one attribution list in Shared, reachable from the main menu

Twemoji, Playdead and the Noun Project icon credits, held against the licence files under Assets by CreditsTests.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

Assets/Scripts/ServerShared/Credits.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+// The third-party attributions the shipped game must show the player. One list, owned here: the credits screen only
+// renders it, and CreditsTests holds it against the licence files in Assets. Unity-free so the headless build checks it.
+public class Credit
+{
+    public string Name;
+    public string Licence;
+    // What the licence requires shown: copyright holders, and any change notice.
+    public string Notice;
+    // The licence file in the repo that carries the full text and that this entry answers for.
+    public string LicenceFile;
+}
+
+public static class Credits
+{
+    public const string TwemojiFile = "Assets/Fonts/Emoji/LICENSE.txt";
+    public const string PlaydeadFile = "Assets/Plugins/Playdead/LICENSE.txt";
+    public const string NounProjectFile = "Assets/Resources/Sprites/Attribution.txt";
+    // Where the player build loads the Noun Project credit lines from (Resources path, no extension).
+    public const string NounProjectResource = "Sprites/Attribution";
+
+    // The full list. The Noun Project icon credits are the lines of its attribution file, whose text the caller supplies
+    // (Unity reads it as a Resources TextAsset; tests read it from disk), so the file stays the one copy of those names.
+    public static IReadOnlyList<Credit> All(string nounProjectAttribution)
+    {
+        var credits = new List<Credit>
+        {
+            new Credit
+            {
+                Name = "Twemoji",
+                Licence = "CC BY 4.0",
+                Notice = "Copyright (c) 2022-present Jason Sofonia & Justine De Caires; copyright (c) 2014-2021 Twitter. " +
+                         "Graphics licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). " +
+                         "Converted to a colour font; the artwork itself is not edited.",
+                LicenceFile = TwemojiFile
+            },
+            new Credit
+            {
+                Name = "Playdead temporal anti-aliasing",
+                Licence = "MIT",
+                Notice = "Copyright (c) 2015 Playdead",
+                LicenceFile = PlaydeadFile
+            },
+            new Credit
+            {
+                Name = "Noun Project icons",
+                Licence = "Noun Project attribution licence",
+                Notice = string.Join("\n", NounProjectLines(nounProjectAttribution)),
+                LicenceFile = NounProjectFile
+            }
+        };
+        Validate(credits);
+        return credits;
+    }
+
+    // The icon credit lines of the attribution file: everything after its "Noun Project" heading.
+    public static IEnumerable<string> NounProjectLines(string attribution) =>
+        (attribution ?? "").Split('\n').Select(line => line.Trim()).Where(line => line.Length > 0).Skip(1);
+
+    // Throws on an entry a player-facing screen could not honestly show.
+    public static void Validate(IReadOnlyList<Credit> credits)
+    {
+        foreach (var credit in credits)
+            if (string.IsNullOrWhiteSpace(credit.Name) || string.IsNullOrWhiteSpace(credit.Licence) ||
+                string.IsNullOrWhiteSpace(credit.Notice) || string.IsNullOrWhiteSpace(credit.LicenceFile))
+                throw new InvalidOperationException($"Credit '{credit.Name}' is missing its name, licence, notice or licence file");
+        var duplicate = credits.GroupBy(credit => credit.LicenceFile).FirstOrDefault(group => group.Count() > 1);
+        if (duplicate != null) throw new InvalidOperationException($"Licence file {duplicate.Key} is credited twice");
+    }
+}

Assets/Scripts/ServerShared/Credits.cs.meta

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