mirror of
https://github.com/actions/runner.git
synced 2025-12-10 12:36:23 +00:00
462 lines
22 KiB
C#
462 lines
22 KiB
C#
using GitHub.DistributedTask.WebApi;
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using GitHub.Runner.Common.Util;
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using System;
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using System.Diagnostics;
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using System.IO;
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using System.IO.Compression;
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using System.Linq;
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using System.Net.Http;
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using System.Threading;
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using System.Threading.Tasks;
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using GitHub.Services.WebApi;
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using GitHub.Runner.Common;
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using GitHub.Runner.Sdk;
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namespace GitHub.Runner.Listener
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{
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[ServiceLocator(Default = typeof(SelfUpdater))]
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public interface ISelfUpdater : IRunnerService
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{
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Task<bool> SelfUpdate(AgentRefreshMessage updateMessage, IJobDispatcher jobDispatcher, bool restartInteractiveRunner, CancellationToken token);
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}
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public class SelfUpdater : RunnerService, ISelfUpdater
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{
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private static string _packageType = "agent";
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private static string _platform = BuildConstants.RunnerPackage.PackageName;
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private PackageMetadata _targetPackage;
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private ITerminal _terminal;
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private IRunnerServer _runnerServer;
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private int _poolId;
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private int _agentId;
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public override void Initialize(IHostContext hostContext)
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{
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base.Initialize(hostContext);
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_terminal = hostContext.GetService<ITerminal>();
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_runnerServer = HostContext.GetService<IRunnerServer>();
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var configStore = HostContext.GetService<IConfigurationStore>();
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var settings = configStore.GetSettings();
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_poolId = settings.PoolId;
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_agentId = settings.AgentId;
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}
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public async Task<bool> SelfUpdate(AgentRefreshMessage updateMessage, IJobDispatcher jobDispatcher, bool restartInteractiveRunner, CancellationToken token)
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{
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if (!await UpdateNeeded(updateMessage.TargetVersion, token))
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{
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Trace.Info($"Can't find available update package.");
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return false;
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}
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Trace.Info($"An update is available.");
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// Print console line that warn user not shutdown runner.
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await UpdateRunnerUpdateStateAsync("Runner update in progress, do not shutdown runner.");
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await UpdateRunnerUpdateStateAsync($"Downloading {_targetPackage.Version} runner");
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await DownloadLatestRunner(token);
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Trace.Info($"Download latest runner and unzip into runner root.");
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// wait till all running job finish
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await UpdateRunnerUpdateStateAsync("Waiting for current job finish running.");
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await jobDispatcher.WaitAsync(token);
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Trace.Info($"All running job has exited.");
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// delete runner backup
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DeletePreviousVersionRunnerBackup(token);
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Trace.Info($"Delete old version runner backup.");
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// generate update script from template
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await UpdateRunnerUpdateStateAsync("Generate and execute update script.");
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string updateScript = GenerateUpdateScript(restartInteractiveRunner);
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Trace.Info($"Generate update script into: {updateScript}");
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// kick off update script
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Process invokeScript = new Process();
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#if OS_WINDOWS
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invokeScript.StartInfo.FileName = WhichUtil.Which("cmd.exe", trace: Trace);
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invokeScript.StartInfo.Arguments = $"/c \"{updateScript}\"";
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#elif (OS_OSX || OS_LINUX)
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invokeScript.StartInfo.FileName = WhichUtil.Which("bash", trace: Trace);
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invokeScript.StartInfo.Arguments = $"\"{updateScript}\"";
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#endif
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invokeScript.Start();
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Trace.Info($"Update script start running");
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await UpdateRunnerUpdateStateAsync("Runner will exit shortly for update, should back online within 10 seconds.");
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return true;
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}
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private async Task<bool> UpdateNeeded(string targetVersion, CancellationToken token)
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{
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// when talk to old version server, always prefer latest package.
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// old server won't send target version as part of update message.
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if (string.IsNullOrEmpty(targetVersion))
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{
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var packages = await _runnerServer.GetPackagesAsync(_packageType, _platform, 1, token);
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if (packages == null || packages.Count == 0)
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{
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Trace.Info($"There is no package for {_packageType} and {_platform}.");
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return false;
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}
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_targetPackage = packages.FirstOrDefault();
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}
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else
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{
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_targetPackage = await _runnerServer.GetPackageAsync(_packageType, _platform, targetVersion, token);
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if (_targetPackage == null)
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{
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Trace.Info($"There is no package for {_packageType} and {_platform} with version {targetVersion}.");
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return false;
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}
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}
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Trace.Info($"Version '{_targetPackage.Version}' of '{_targetPackage.Type}' package available in server.");
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PackageVersion serverVersion = new PackageVersion(_targetPackage.Version);
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Trace.Info($"Current running runner version is {BuildConstants.RunnerPackage.Version}");
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PackageVersion runnerVersion = new PackageVersion(BuildConstants.RunnerPackage.Version);
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return serverVersion.CompareTo(runnerVersion) > 0;
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}
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/// <summary>
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/// _work
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/// \_update
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/// \bin
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/// \externals
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/// \run.sh
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/// \run.cmd
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/// \package.zip //temp download .zip/.tar.gz
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/// </summary>
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/// <param name="token"></param>
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/// <returns></returns>
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private async Task DownloadLatestRunner(CancellationToken token)
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{
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string latestRunnerDirectory = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Work), Constants.Path.UpdateDirectory);
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IOUtil.DeleteDirectory(latestRunnerDirectory, token);
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Directory.CreateDirectory(latestRunnerDirectory);
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int runnerSuffix = 1;
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string archiveFile = null;
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bool downloadSucceeded = false;
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try
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{
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// Download the runner, using multiple attempts in order to be resilient against any networking/CDN issues
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for (int attempt = 1; attempt <= Constants.RunnerDownloadRetryMaxAttempts; attempt++)
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{
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// Generate an available package name, and do our best effort to clean up stale local zip files
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while (true)
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{
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if (_targetPackage.Platform.StartsWith("win"))
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{
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archiveFile = Path.Combine(latestRunnerDirectory, $"runner{runnerSuffix}.zip");
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}
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else
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{
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archiveFile = Path.Combine(latestRunnerDirectory, $"runner{runnerSuffix}.tar.gz");
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}
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try
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{
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// delete .zip file
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if (!string.IsNullOrEmpty(archiveFile) && File.Exists(archiveFile))
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{
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Trace.Verbose("Deleting latest runner package zip '{0}'", archiveFile);
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IOUtil.DeleteFile(archiveFile);
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}
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break;
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}
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catch (Exception ex)
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{
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// couldn't delete the file for whatever reason, so generate another name
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Trace.Warning("Failed to delete runner package zip '{0}'. Exception: {1}", archiveFile, ex);
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runnerSuffix++;
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}
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}
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// Allow a 15-minute package download timeout, which is good enough to update the runner from a 1 Mbit/s ADSL connection.
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if (!int.TryParse(Environment.GetEnvironmentVariable("GITHUB_ACTIONS_RUNNER_DOWNLOAD_TIMEOUT") ?? string.Empty, out int timeoutSeconds))
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{
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timeoutSeconds = 15 * 60;
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}
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Trace.Info($"Attempt {attempt}: save latest runner into {archiveFile}.");
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using (var downloadTimeout = new CancellationTokenSource(TimeSpan.FromSeconds(timeoutSeconds)))
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using (var downloadCts = CancellationTokenSource.CreateLinkedTokenSource(downloadTimeout.Token, token))
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{
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try
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{
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Trace.Info($"Download runner: begin download");
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//open zip stream in async mode
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using (HttpClient httpClient = new HttpClient(HostContext.CreateHttpClientHandler()))
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using (FileStream fs = new FileStream(archiveFile, FileMode.Create, FileAccess.Write, FileShare.None, bufferSize: 4096, useAsync: true))
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using (Stream result = await httpClient.GetStreamAsync(_targetPackage.DownloadUrl))
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{
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//81920 is the default used by System.IO.Stream.CopyTo and is under the large object heap threshold (85k).
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await result.CopyToAsync(fs, 81920, downloadCts.Token);
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await fs.FlushAsync(downloadCts.Token);
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}
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Trace.Info($"Download runner: finished download");
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downloadSucceeded = true;
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break;
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}
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catch (OperationCanceledException) when (token.IsCancellationRequested)
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{
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Trace.Info($"Runner download has been canceled.");
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throw;
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}
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catch (Exception ex)
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{
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if (downloadCts.Token.IsCancellationRequested)
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{
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Trace.Warning($"Runner download has timed out after {timeoutSeconds} seconds");
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}
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Trace.Warning($"Failed to get package '{archiveFile}' from '{_targetPackage.DownloadUrl}'. Exception {ex}");
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}
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}
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}
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if (!downloadSucceeded)
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{
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throw new TaskCanceledException($"Runner package '{archiveFile}' failed after {Constants.RunnerDownloadRetryMaxAttempts} download attempts");
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}
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// If we got this far, we know that we've successfully downloaded the runner package
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if (archiveFile.EndsWith(".zip", StringComparison.OrdinalIgnoreCase))
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{
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ZipFile.ExtractToDirectory(archiveFile, latestRunnerDirectory);
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}
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else if (archiveFile.EndsWith(".tar.gz", StringComparison.OrdinalIgnoreCase))
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{
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string tar = WhichUtil.Which("tar", trace: Trace);
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if (string.IsNullOrEmpty(tar))
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{
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throw new NotSupportedException($"tar -xzf");
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}
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// tar -xzf
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using (var processInvoker = HostContext.CreateService<IProcessInvoker>())
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{
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processInvoker.OutputDataReceived += new EventHandler<ProcessDataReceivedEventArgs>((sender, args) =>
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{
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if (!string.IsNullOrEmpty(args.Data))
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{
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Trace.Info(args.Data);
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}
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});
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processInvoker.ErrorDataReceived += new EventHandler<ProcessDataReceivedEventArgs>((sender, args) =>
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{
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if (!string.IsNullOrEmpty(args.Data))
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{
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Trace.Error(args.Data);
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}
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});
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int exitCode = await processInvoker.ExecuteAsync(latestRunnerDirectory, tar, $"-xzf \"{archiveFile}\"", null, token);
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if (exitCode != 0)
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{
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throw new NotSupportedException($"Can't use 'tar -xzf' extract archive file: {archiveFile}. return code: {exitCode}.");
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}
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}
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}
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else
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{
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throw new NotSupportedException($"{archiveFile}");
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}
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Trace.Info($"Finished getting latest runner package at: {latestRunnerDirectory}.");
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}
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finally
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{
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try
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{
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// delete .zip file
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if (!string.IsNullOrEmpty(archiveFile) && File.Exists(archiveFile))
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{
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Trace.Verbose("Deleting latest runner package zip: {0}", archiveFile);
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IOUtil.DeleteFile(archiveFile);
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}
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}
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catch (Exception ex)
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{
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//it is not critical if we fail to delete the .zip file
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Trace.Warning("Failed to delete runner package zip '{0}'. Exception: {1}", archiveFile, ex);
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}
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}
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// copy latest runner into runner root folder
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// copy bin from _work/_update -> bin.version under root
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string binVersionDir = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Root), $"{Constants.Path.BinDirectory}.{_targetPackage.Version}");
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Directory.CreateDirectory(binVersionDir);
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Trace.Info($"Copy {Path.Combine(latestRunnerDirectory, Constants.Path.BinDirectory)} to {binVersionDir}.");
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IOUtil.CopyDirectory(Path.Combine(latestRunnerDirectory, Constants.Path.BinDirectory), binVersionDir, token);
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// copy externals from _work/_update -> externals.version under root
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string externalsVersionDir = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Root), $"{Constants.Path.ExternalsDirectory}.{_targetPackage.Version}");
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Directory.CreateDirectory(externalsVersionDir);
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Trace.Info($"Copy {Path.Combine(latestRunnerDirectory, Constants.Path.ExternalsDirectory)} to {externalsVersionDir}.");
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IOUtil.CopyDirectory(Path.Combine(latestRunnerDirectory, Constants.Path.ExternalsDirectory), externalsVersionDir, token);
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// copy and replace all .sh/.cmd files
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Trace.Info($"Copy any remaining .sh/.cmd files into runner root.");
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foreach (FileInfo file in new DirectoryInfo(latestRunnerDirectory).GetFiles() ?? new FileInfo[0])
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{
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// Copy and replace the file.
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file.CopyTo(Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Root), file.Name), true);
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}
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}
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private void DeletePreviousVersionRunnerBackup(CancellationToken token)
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{
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// delete previous backup runner (back compat, can be remove after serval sprints)
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// bin.bak.2.99.0
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// externals.bak.2.99.0
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foreach (string existBackUp in Directory.GetDirectories(HostContext.GetDirectory(WellKnownDirectory.Root), "*.bak.*"))
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{
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Trace.Info($"Delete existing runner backup at {existBackUp}.");
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try
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{
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IOUtil.DeleteDirectory(existBackUp, token);
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}
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catch (Exception ex) when (!(ex is OperationCanceledException))
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{
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Trace.Error(ex);
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Trace.Info($"Catch exception during delete backup folder {existBackUp}, ignore this error try delete the backup folder on next auto-update.");
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}
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}
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// delete old bin.2.99.0 folder, only leave the current version and the latest download version
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var allBinDirs = Directory.GetDirectories(HostContext.GetDirectory(WellKnownDirectory.Root), "bin.*");
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if (allBinDirs.Length > 2)
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{
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// there are more than 2 bin.version folder.
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// delete older bin.version folders.
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foreach (var oldBinDir in allBinDirs)
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{
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if (string.Equals(oldBinDir, Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Root), $"bin"), StringComparison.OrdinalIgnoreCase) ||
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string.Equals(oldBinDir, Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Root), $"bin.{BuildConstants.RunnerPackage.Version}"), StringComparison.OrdinalIgnoreCase) ||
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string.Equals(oldBinDir, Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Root), $"bin.{_targetPackage.Version}"), StringComparison.OrdinalIgnoreCase))
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{
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// skip for current runner version
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continue;
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}
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Trace.Info($"Delete runner bin folder's backup at {oldBinDir}.");
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try
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{
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IOUtil.DeleteDirectory(oldBinDir, token);
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}
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catch (Exception ex) when (!(ex is OperationCanceledException))
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{
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Trace.Error(ex);
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Trace.Info($"Catch exception during delete backup folder {oldBinDir}, ignore this error try delete the backup folder on next auto-update.");
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}
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}
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}
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// delete old externals.2.99.0 folder, only leave the current version and the latest download version
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var allExternalsDirs = Directory.GetDirectories(HostContext.GetDirectory(WellKnownDirectory.Root), "externals.*");
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if (allExternalsDirs.Length > 2)
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{
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// there are more than 2 externals.version folder.
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// delete older externals.version folders.
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foreach (var oldExternalDir in allExternalsDirs)
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{
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if (string.Equals(oldExternalDir, Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Root), $"externals"), StringComparison.OrdinalIgnoreCase) ||
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string.Equals(oldExternalDir, Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Root), $"externals.{BuildConstants.RunnerPackage.Version}"), StringComparison.OrdinalIgnoreCase) ||
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string.Equals(oldExternalDir, Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Root), $"externals.{_targetPackage.Version}"), StringComparison.OrdinalIgnoreCase))
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{
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// skip for current runner version
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continue;
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}
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Trace.Info($"Delete runner externals folder's backup at {oldExternalDir}.");
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try
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{
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IOUtil.DeleteDirectory(oldExternalDir, token);
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}
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catch (Exception ex) when (!(ex is OperationCanceledException))
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{
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Trace.Error(ex);
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Trace.Info($"Catch exception during delete backup folder {oldExternalDir}, ignore this error try delete the backup folder on next auto-update.");
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}
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}
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}
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}
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private string GenerateUpdateScript(bool restartInteractiveRunner)
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{
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int processId = Process.GetCurrentProcess().Id;
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string updateLog = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Diag), $"SelfUpdate-{DateTime.UtcNow.ToString("yyyyMMdd-HHmmss")}.log");
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string runnerRoot = HostContext.GetDirectory(WellKnownDirectory.Root);
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#if OS_WINDOWS
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string templateName = "update.cmd.template";
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#else
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string templateName = "update.sh.template";
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#endif
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string templatePath = Path.Combine(runnerRoot, $"bin.{_targetPackage.Version}", templateName);
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string template = File.ReadAllText(templatePath);
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template = template.Replace("_PROCESS_ID_", processId.ToString());
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template = template.Replace("_RUNNER_PROCESS_NAME_", $"Runner.Listener{IOUtil.ExeExtension}");
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template = template.Replace("_ROOT_FOLDER_", runnerRoot);
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template = template.Replace("_EXIST_RUNNER_VERSION_", BuildConstants.RunnerPackage.Version);
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template = template.Replace("_DOWNLOAD_RUNNER_VERSION_", _targetPackage.Version);
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template = template.Replace("_UPDATE_LOG_", updateLog);
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template = template.Replace("_RESTART_INTERACTIVE_RUNNER_", restartInteractiveRunner ? "1" : "0");
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#if OS_WINDOWS
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string scriptName = "_update.cmd";
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#else
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string scriptName = "_update.sh";
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#endif
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string updateScript = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Work), scriptName);
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if (File.Exists(updateScript))
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{
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IOUtil.DeleteFile(updateScript);
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}
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File.WriteAllText(updateScript, template);
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return updateScript;
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}
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private async Task UpdateRunnerUpdateStateAsync(string currentState)
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{
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_terminal.WriteLine(currentState);
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try
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{
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await _runnerServer.UpdateAgentUpdateStateAsync(_poolId, _agentId, currentState);
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}
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catch (VssResourceNotFoundException)
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{
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// ignore VssResourceNotFoundException, this exception means the runner is configured against a old server that doesn't support report runner update detail.
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Trace.Info($"Catch VssResourceNotFoundException during report update state, ignore this error for backcompat.");
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}
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catch (Exception ex)
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{
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Trace.Error(ex);
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Trace.Info($"Catch exception during report update state, ignore this error and continue auto-update.");
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}
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}
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}
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}
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