private static void UpdateMetaFiles()

in Assets/MRTK/Tools/MSBuild/Scripts/AssetScriptReferenceRetargeter.cs [671:813]
103 lines of code
29 McCabe index (conditional complexity)

        private static void UpdateMetaFiles(Dictionary<string, AssemblyInformation> assemblyInformation)
        {
            if (!TemplateFiles.Instance.PluginMetaTemplatePaths.TryGetValue(BuildTargetGroup.Unknown, out FileInfo editorMetaFile))
            {
                throw new FileNotFoundException("Could not find sample editor dll.meta template.");
            }

            if (!TemplateFiles.Instance.PluginMetaTemplatePaths.TryGetValue(BuildTargetGroup.WSA, out FileInfo uwpMetaFile))
            {
                throw new FileNotFoundException("Could not find sample UWP dll.meta template.");
            }

            if (!TemplateFiles.Instance.PluginMetaTemplatePaths.TryGetValue(BuildTargetGroup.Standalone, out FileInfo standaloneMetaFile))
            {
                throw new FileNotFoundException("Could not find sample standalone dll.meta template.");
            }

            if (!TemplateFiles.Instance.PluginMetaTemplatePaths.TryGetValue(BuildTargetGroup.Android, out FileInfo androidMetaFile))
            {
                throw new FileNotFoundException("Could not find sample Android dll.meta template.");
            }

            if (!TemplateFiles.Instance.PluginMetaTemplatePaths.TryGetValue(BuildTargetGroup.iOS, out FileInfo iOSMetaFile))
            {
                throw new FileNotFoundException("Could not find sample iOS dll.meta template.");
            }

            string editorMetaFileTemplate = File.ReadAllText(editorMetaFile.FullName);
            string uapMetaFileTemplate = File.ReadAllText(uwpMetaFile.FullName);
            string standaloneMetaFileTemplate = File.ReadAllText(standaloneMetaFile.FullName);
            string androidMetaFileTemplate = File.ReadAllText(androidMetaFile.FullName);
            string iOSMetaFileTemplate = File.ReadAllText(iOSMetaFile.FullName);

            Dictionary<AssemblyInformation, FileInfo[]> mappings = new DirectoryInfo(Application.dataPath.Replace("Assets", "NuGet/Plugins"))
                .GetDirectories("*", SearchOption.AllDirectories)
                .SelectMany(t => t.EnumerateFiles().Where(f => f.FullName.EndsWith(".dll") || f.FullName.EndsWith(".pdb")))
                .GroupBy(t => Path.GetFileNameWithoutExtension(t.Name))
                .ToDictionary(t => assemblyInformation[t.Key], t => t.ToArray());

            foreach (KeyValuePair<AssemblyInformation, FileInfo[]> mapping in mappings)
            {
                // Editor is GUID + 1; which has done when we processed Editor DLLs
                // Standalone is GUID + 2
                // UAP is GUID + 3
                // Editor PDB is + 4
                // Standalone PDB is + 5
                // UAP PDB is + 6
                // Android is GUID + 7
                // iOS is GUID + 8
                // Android PDB is + 9
                // iOS PDB is + 10
                string templateToUse = editorMetaFileTemplate;
                foreach (FileInfo file in mapping.Value)
                {
                    string dllGuid = mapping.Key.Guid;
                    // First cycle happens in RetrieveAsmDefGuids
                    // dllGuid = CycleGuidForward(dllGuid);

                    if (file.Extension.Equals(".dll") && file.DirectoryName.EndsWith("EditorPlayer"))
                    {
                        templateToUse = editorMetaFileTemplate;
                        goto WriteMeta;
                    }

                    dllGuid = CycleGuidForward(dllGuid);

                    if (file.Extension.Equals(".dll") && file.DirectoryName.EndsWith("StandalonePlayer"))
                    {
                        templateToUse = standaloneMetaFileTemplate;
                        goto WriteMeta;
                    }

                    dllGuid = CycleGuidForward(dllGuid);

                    if (file.Extension.Equals(".dll") && file.DirectoryName.EndsWith("UAPPlayer"))
                    {
                        templateToUse = uapMetaFileTemplate;
                        goto WriteMeta;
                    }

                    dllGuid = CycleGuidForward(dllGuid);

                    // Switch to PDBs
                    if (file.Extension.Equals(".pdb") && file.DirectoryName.EndsWith("EditorPlayer"))
                    {
                        templateToUse = editorMetaFileTemplate;
                        goto WriteMeta;
                    }

                    dllGuid = CycleGuidForward(dllGuid);

                    if (file.Extension.Equals(".pdb") && file.DirectoryName.EndsWith("StandalonePlayer"))
                    {
                        templateToUse = standaloneMetaFileTemplate;
                        goto WriteMeta;
                    }

                    dllGuid = CycleGuidForward(dllGuid);

                    if (file.Extension.Equals(".pdb") && file.DirectoryName.EndsWith("UAPPlayer"))
                    {
                        templateToUse = uapMetaFileTemplate;
                        goto WriteMeta;
                    }

                    dllGuid = CycleGuidForward(dllGuid);

                    if (file.Extension.Equals(".dll") && file.DirectoryName.EndsWith("AndroidPlayer"))
                    {
                        templateToUse = androidMetaFileTemplate;
                        goto WriteMeta;
                    }

                    dllGuid = CycleGuidForward(dllGuid);

                    if (file.Extension.Equals(".dll") && file.DirectoryName.EndsWith("iOSPlayer"))
                    {
                        templateToUse = iOSMetaFileTemplate;
                        goto WriteMeta;
                    }

                    dllGuid = CycleGuidForward(dllGuid);

                    if (file.Extension.Equals(".pdb") && file.DirectoryName.EndsWith("AndroidPlayer"))
                    {
                        templateToUse = androidMetaFileTemplate;
                        goto WriteMeta;
                    }

                    dllGuid = CycleGuidForward(dllGuid);

                    if (file.Extension.Equals(".pdb") && file.DirectoryName.EndsWith("iOSPlayer"))
                    {
                        templateToUse = iOSMetaFileTemplate;
                        goto WriteMeta;
                    }

                WriteMeta:
                    string metaFilePath = $"{file.FullName}.meta";
                    File.WriteAllText(metaFilePath, ProcessMetaTemplate(templateToUse, dllGuid, mapping.Key.ExecutionOrderEntries));
                }
            }
        }