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Support snap as a package manager (#4646)
* Support snap as a package manager * fix whitespace --------- Co-authored-by: Sebastien Duquette <sduquette@fastmail.com>
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‎_plans/snap-package-manager.md‎

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‎src/UniGetUI.Avalonia.slnx‎

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<Platform Solution="*|x64" Project="x64" />
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</Project>
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</Folder>
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<Folder Name="/UniGetUI.PackageEngine.Managers.Snap/">
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<Project Path="UniGetUI.PackageEngine.Managers.Snap/UniGetUI.PackageEngine.Managers.Snap.csproj">
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<Platform Solution="*|arm64" Project="arm64" />
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<Platform Solution="*|x64" Project="x64" />
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</Project>
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</Folder>
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<Folder Name="/UniGetUI.PackageEngine.Managers.Vcpkg/">
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<Project Path="UniGetUI.PackageEngine.Managers.Vcpkg/UniGetUI.PackageEngine.Managers.Vcpkg.csproj">
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<Platform Solution="*|arm64" Project="arm64" />
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<Platform Solution="*|x64" Project="x64" />
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</Project>
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</Folder>
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<Folder Name="/UniGetUI.PackageEngine.Tests/">
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<Project Path="UniGetUI.PackageEngine.Tests/UniGetUI.PackageEngine.Tests.csproj">
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<Platform Solution="*|arm64" Project="arm64" />
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<Platform Solution="*|x64" Project="x64" />
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</Project>
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</Folder>
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</Solution>

‎src/UniGetUI.Interface.Enums/Enums.cs‎

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@@ -88,6 +88,7 @@ public enum IconType
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Apt = '\uE944',
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Dnf = '\uE945',
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Pacman = '\uE946',
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Snap = '\uE947',
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}
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public class NotificationArguments

‎src/UniGetUI.PackageEngine.Managers.Snap/Helpers/SnapPkgDetailsHelper.cs‎

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using System.Diagnostics;
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using UniGetUI.Core.IconEngine;
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using UniGetUI.PackageEngine.Classes.Manager.BaseProviders;
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using UniGetUI.PackageEngine.Enums;
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using UniGetUI.PackageEngine.Interfaces;
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using UniGetUI.PackageEngine.ManagerClasses.Classes;
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namespace UniGetUI.PackageEngine.Managers.SnapManager;
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internal sealed class SnapPkgDetailsHelper : BasePkgDetailsHelper
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{
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public SnapPkgDetailsHelper(Snap manager)
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: base(manager) { }
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protected override void GetDetails_UnSafe(IPackageDetails details)
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{
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using var p = new Process
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{
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StartInfo = new ProcessStartInfo
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{
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FileName = Manager.Status.ExecutablePath,
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Arguments = $"info {details.Package.Id}",
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UseShellExecute = false,
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RedirectStandardOutput = true,
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RedirectStandardError = true,
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CreateNoWindow = true,
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},
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};
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p.StartInfo.Environment["LANG"] = "C";
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p.StartInfo.Environment["LC_ALL"] = "C";
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IProcessTaskLogger logger = Manager.TaskLogger.CreateNew(
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LoggableTaskType.LoadPackageDetails, p);
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p.Start();
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var descLines = new List<string>();
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bool inDescription = false;
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bool inChannels = false;
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while (p.StandardOutput.ReadLine() is { } line)
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{
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logger.AddToStdOut(line);
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if (line.StartsWith("channels:", StringComparison.Ordinal))
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{
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inChannels = true;
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inDescription = false;
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continue;
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}
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if (inChannels && line.StartsWith(" "))
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continue;
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if (inChannels && !line.StartsWith(" "))
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inChannels = false;
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if (inDescription)
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{
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if (line.StartsWith(" "))
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{
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var descLine = line.TrimStart();
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if (descLine != ".") descLines.Add(descLine);
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continue;
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}
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else
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{
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inDescription = false;
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}
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}
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var colonIdx = line.IndexOf(':', StringComparison.Ordinal);
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if (colonIdx <= 0) continue;
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var key = line[..colonIdx].Trim().ToLowerInvariant();
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var value = line[(colonIdx + 1)..].Trim();
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switch (key)
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{
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case "summary":
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details.Description = value;
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break;
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case "publisher":
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details.Publisher = value.Replace("\u2713", "").Trim();
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break;
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case "license":
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details.License = value;
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break;
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case "homepage":
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if (Uri.TryCreate(value, UriKind.Absolute, out var homepage))
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details.HomepageUrl = homepage;
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break;
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case "store-url":
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if (Uri.TryCreate(value, UriKind.Absolute, out var storeUrl))
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details.ManifestUrl = storeUrl;
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break;
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case "description":
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if (value == "|")
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{
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details.Description = "";
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inDescription = true;
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}
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else
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{
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details.Description = value;
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}
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break;
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}
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}
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if (descLines.Count > 0)
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details.Description = (details.Description ?? "") + "\n" + string.Join("\n", descLines);
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logger.AddToStdErr(p.StandardError.ReadToEnd());
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p.WaitForExit();
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logger.Close(p.ExitCode);
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}
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protected override CacheableIcon? GetIcon_UnSafe(IPackage package)
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=> throw new NotImplementedException();
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protected override IReadOnlyList<Uri> GetScreenshots_UnSafe(IPackage package)
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=> Array.Empty<Uri>();
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protected override string? GetInstallLocation_UnSafe(IPackage package)
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=> $"/snap/{package.Id}/current";
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protected override IReadOnlyList<string> GetInstallableVersions_UnSafe(IPackage package)
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=> throw new InvalidOperationException("Snap does not support installing arbitrary versions");
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}

‎src/UniGetUI.PackageEngine.Managers.Snap/Helpers/SnapPkgOperationHelper.cs‎

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using UniGetUI.PackageEngine.Classes.Manager.BaseProviders;
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using UniGetUI.PackageEngine.Enums;
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using UniGetUI.PackageEngine.Interfaces;
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using UniGetUI.PackageEngine.Serializable;
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namespace UniGetUI.PackageEngine.Managers.SnapManager;
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internal sealed class SnapPkgOperationHelper : BasePkgOperationHelper
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{
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public SnapPkgOperationHelper(Snap manager)
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: base(manager) { }
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protected override IReadOnlyList<string> _getOperationParameters(
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IPackage package,
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InstallOptions options,
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OperationType operation)
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{
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options.RunAsAdministrator = true;
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List<string> parameters =
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[
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operation switch
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{
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OperationType.Install => Manager.Properties.InstallVerb,
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OperationType.Uninstall => Manager.Properties.UninstallVerb,
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OperationType.Update => Manager.Properties.UpdateVerb,
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_ => throw new InvalidDataException("Invalid package operation"),
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},
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];
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parameters.Add(package.Id);
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if (operation == OperationType.Uninstall)
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parameters.Add("--purge");
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parameters.AddRange(
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operation switch
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{
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OperationType.Update => options.CustomParameters_Update,
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OperationType.Uninstall => options.CustomParameters_Uninstall,
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_ => options.CustomParameters_Install,
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});
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return parameters;
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}
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protected override OperationVeredict _getOperationResult(
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IPackage package,
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OperationType operation,
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IReadOnlyList<string> processOutput,
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int returnCode)
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{
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return returnCode == 0 ? OperationVeredict.Success : OperationVeredict.Failure;
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}
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}

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