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GitSourceProvider.cs
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GitSourceProvider.cs
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using Microsoft.TeamFoundation.Build.WebApi;
using Pipelines = Microsoft.TeamFoundation.DistributedTask.Pipelines;
using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using System.IO;
using System.Text.RegularExpressions;
using System.Text;
using System.Diagnostics;
using Agent.Sdk;
using System.Linq;
using Microsoft.TeamFoundation.DistributedTask.WebApi;
using Microsoft.VisualStudio.Services.WebApi;
using Microsoft.VisualStudio.Services.Agent.Util;
namespace Agent.Plugins.Repository
{
public class ExternalGitSourceProvider : GitSourceProvider
{
// external git repository won't use auth header cmdline arg, since we don't know the auth scheme.
public override bool GitSupportUseAuthHeader(AgentTaskPluginExecutionContext executionContext, GitCliManager gitCommandManager)
{
return false;
}
public override bool GitLfsSupportUseAuthHeader(AgentTaskPluginExecutionContext executionContext, GitCliManager gitCommandManager)
{
return false;
}
public override void RequirementCheck(AgentTaskPluginExecutionContext executionContext, Pipelines.RepositoryResource repository, GitCliManager gitCommandManager)
{
#if OS_WINDOWS
// check git version for SChannel SSLBackend (Windows Only)
bool schannelSslBackend = StringUtil.ConvertToBoolean(executionContext.Variables.GetValueOrDefault("agent.gituseschannel")?.Value);
if (schannelSslBackend)
{
gitCommandManager.EnsureGitVersion(_minGitVersionSupportSSLBackendOverride, throwOnNotMatch: true);
}
#endif
}
public override string GenerateAuthHeader(AgentTaskPluginExecutionContext executionContext, string username, string password)
{
// can't generate auth header for external git.
throw new NotSupportedException(nameof(ExternalGitSourceProvider.GenerateAuthHeader));
}
}
public sealed class AuthenticatedGitSourceProvider : GitSourceProvider
{
public override bool GitSupportUseAuthHeader(AgentTaskPluginExecutionContext executionContext, GitCliManager gitCommandManager)
{
// v2.9 git exist use auth header.
return gitCommandManager.EnsureGitVersion(_minGitVersionSupportAuthHeader, throwOnNotMatch: false);
}
public override bool GitLfsSupportUseAuthHeader(AgentTaskPluginExecutionContext executionContext, GitCliManager gitCommandManager)
{
// v2.1 git-lfs exist use auth header.
return gitCommandManager.EnsureGitLFSVersion(_minGitLfsVersionSupportAuthHeader, throwOnNotMatch: false);
}
public override void RequirementCheck(AgentTaskPluginExecutionContext executionContext, Pipelines.RepositoryResource repository, GitCliManager gitCommandManager)
{
#if OS_WINDOWS
// check git version for SChannel SSLBackend (Windows Only)
bool schannelSslBackend = StringUtil.ConvertToBoolean(executionContext.Variables.GetValueOrDefault("agent.gituseschannel")?.Value);
if (schannelSslBackend)
{
gitCommandManager.EnsureGitVersion(_minGitVersionSupportSSLBackendOverride, throwOnNotMatch: true);
}
#endif
}
public override string GenerateAuthHeader(AgentTaskPluginExecutionContext executionContext, string username, string password)
{
// use basic auth header with username:password in base64encoding.
string authHeader = $"{username ?? string.Empty}:{password ?? string.Empty}";
string base64encodedAuthHeader = Convert.ToBase64String(Encoding.UTF8.GetBytes(authHeader));
// add base64 encoding auth header into secretMasker.
executionContext.SetSecret(base64encodedAuthHeader);
return $"basic {base64encodedAuthHeader}";
}
}
public sealed class TfsGitSourceProvider : GitSourceProvider
{
public override bool GitSupportUseAuthHeader(AgentTaskPluginExecutionContext executionContext, GitCliManager gitCommandManager)
{
// v2.9 git exist use auth header for tfsgit repository.
return gitCommandManager.EnsureGitVersion(_minGitVersionSupportAuthHeader, throwOnNotMatch: false);
}
public override bool GitLfsSupportUseAuthHeader(AgentTaskPluginExecutionContext executionContext, GitCliManager gitCommandManager)
{
// v2.1 git-lfs exist use auth header for github repository.
return gitCommandManager.EnsureGitLFSVersion(_minGitLfsVersionSupportAuthHeader, throwOnNotMatch: false);
}
// When the repository is a TfsGit, figure out the endpoint is hosted vsts git or on-prem tfs git
// if repository is on-prem tfs git, make sure git version greater than 2.9
// we have to use http.extraheader option to provide auth header for on-prem tfs git
public override void RequirementCheck(AgentTaskPluginExecutionContext executionContext, Pipelines.RepositoryResource repository, GitCliManager gitCommandManager)
{
var selfManageGitCreds = StringUtil.ConvertToBoolean(executionContext.Variables.GetValueOrDefault("system.selfmanagegitcreds")?.Value);
if (selfManageGitCreds)
{
// Customer choose to own git creds by themselves, we don't have to worry about git version anymore.
return;
}
// Since that variable is added around TFS 2015 Qu2.
// Old TFS AT will not send this variable to build agent, and VSTS will always send it to build agent.
bool onPremTfsGit = StringUtil.ConvertToBoolean(repository.Properties.Get<string>(EndpointData.OnPremTfsGit), true);
// ensure git version and git-lfs version for on-prem tfsgit.
if (onPremTfsGit)
{
gitCommandManager.EnsureGitVersion(_minGitVersionSupportAuthHeader, throwOnNotMatch: true);
bool gitLfsSupport = StringUtil.ConvertToBoolean(repository.Properties.Get<string>(EndpointData.GitLfsSupport));
if (gitLfsSupport)
{
gitCommandManager.EnsureGitLFSVersion(_minGitLfsVersionSupportAuthHeader, throwOnNotMatch: true);
}
}
#if OS_WINDOWS
// check git version for SChannel SSLBackend (Windows Only)
bool schannelSslBackend = StringUtil.ConvertToBoolean(executionContext.Variables.GetValueOrDefault("agent.gituseschannel")?.Value);
if (schannelSslBackend)
{
gitCommandManager.EnsureGitVersion(_minGitVersionSupportSSLBackendOverride, throwOnNotMatch: true);
}
#endif
}
public override string GenerateAuthHeader(AgentTaskPluginExecutionContext executionContext, string username, string password)
{
// tfsgit use bearer auth header with JWToken from systemconnection.
ArgUtil.NotNullOrEmpty(password, nameof(password));
return $"bearer {password}";
}
}
public abstract class GitSourceProvider : ISourceProvider
{
// refs prefix
// TODO: how to deal with limited refs?
private const string _refsPrefix = "refs/heads/";
private const string _remoteRefsPrefix = "refs/remotes/origin/";
private const string _pullRefsPrefix = "refs/pull/";
private const string _remotePullRefsPrefix = "refs/remotes/pull/";
// min git version that support add extra auth header.
protected Version _minGitVersionSupportAuthHeader = new Version(2, 9);
#if OS_WINDOWS
// min git version that support override sslBackend setting.
protected Version _minGitVersionSupportSSLBackendOverride = new Version(2, 14, 2);
#endif
// min git-lfs version that support add extra auth header.
protected Version _minGitLfsVersionSupportAuthHeader = new Version(2, 1);
public abstract bool GitSupportUseAuthHeader(AgentTaskPluginExecutionContext executionContext, GitCliManager gitCommandManager);
public abstract bool GitLfsSupportUseAuthHeader(AgentTaskPluginExecutionContext executionContext, GitCliManager gitCommandManager);
public abstract void RequirementCheck(AgentTaskPluginExecutionContext executionContext, Pipelines.RepositoryResource repository, GitCliManager gitCommandManager);
public abstract string GenerateAuthHeader(AgentTaskPluginExecutionContext executionContext, string username, string password);
public async Task GetSourceAsync(
AgentTaskPluginExecutionContext executionContext,
Pipelines.RepositoryResource repository,
CancellationToken cancellationToken)
{
// Validate args.
ArgUtil.NotNull(executionContext, nameof(executionContext));
ArgUtil.NotNull(repository, nameof(repository));
Dictionary<string, string> configModifications = new Dictionary<string, string>();
bool selfManageGitCreds = false;
Uri repositoryUrlWithCred = null;
Uri proxyUrlWithCred = null;
string proxyUrlWithCredString = null;
Uri gitLfsUrlWithCred = null;
bool useSelfSignedCACert = false;
bool useClientCert = false;
string clientCertPrivateKeyAskPassFile = null;
executionContext.Output($"Syncing repository: {repository.Properties.Get<string>("name")} ({repository.Type})");
Uri repositoryUrl = repository.Url;
if (!repositoryUrl.IsAbsoluteUri)
{
throw new InvalidOperationException("Repository url need to be an absolute uri.");
}
//string targetPath = repository.Properties.Get<string>("sourcedirectory");
string targetPath = executionContext.Variables.GetValueOrDefault("build.sourcesdirectory")?.Value;
string sourceBranch = repository.Properties.Get<string>("sourcebranch");
string sourceVersion = repository.Version;
bool clean = StringUtil.ConvertToBoolean(repository.Properties.Get<string>(EndpointData.Clean));
bool checkoutSubmodules = StringUtil.ConvertToBoolean(repository.Properties.Get<string>(EndpointData.CheckoutSubmodules));
bool checkoutNestedSubmodules = StringUtil.ConvertToBoolean(repository.Properties.Get<string>(EndpointData.CheckoutNestedSubmodules));
bool acceptUntrustedCerts = StringUtil.ConvertToBoolean(repository.Properties.Get<string>(EndpointData.AcceptUntrustedCertificates));
var agentCert = executionContext.GetCertConfiguration();
acceptUntrustedCerts = acceptUntrustedCerts || (agentCert?.SkipServerCertificateValidation ?? false);
int fetchDepth = 0;
if (!int.TryParse(repository.Properties.Get<string>(EndpointData.FetchDepth), out fetchDepth) || fetchDepth < 0)
{
fetchDepth = 0;
}
// prefer feature variable over endpoint data
if (int.TryParse(executionContext.Variables.GetValueOrDefault("agent.source.git.shallowFetchDepth")?.Value, out int fetchDepthOverwrite) && fetchDepthOverwrite >= 0)
{
fetchDepth = fetchDepthOverwrite;
}
bool gitLfsSupport = StringUtil.ConvertToBoolean(repository.Properties.Get<string>(EndpointData.GitLfsSupport));
// prefer feature variable over endpoint data
if (executionContext.Variables.GetValueOrDefault("agent.source.git.lfs") != null)
{
gitLfsSupport = StringUtil.ConvertToBoolean(executionContext.Variables.GetValueOrDefault("agent.source.git.lfs")?.Value);
}
// TODO: Make sure server set this.
bool exposeCred = StringUtil.ConvertToBoolean(repository.Properties.Get<string>("preservecredential"));
executionContext.Debug($"repository url={repositoryUrl}");
executionContext.Debug($"targetPath={targetPath}");
executionContext.Debug($"sourceBranch={sourceBranch}");
executionContext.Debug($"sourceVersion={sourceVersion}");
executionContext.Debug($"clean={clean}");
executionContext.Debug($"checkoutSubmodules={checkoutSubmodules}");
executionContext.Debug($"checkoutNestedSubmodules={checkoutNestedSubmodules}");
executionContext.Debug($"exposeCred={exposeCred}");
executionContext.Debug($"fetchDepth={fetchDepth}");
executionContext.Debug($"gitLfsSupport={gitLfsSupport}");
executionContext.Debug($"acceptUntrustedCerts={acceptUntrustedCerts}");
bool preferGitFromPath;
#if OS_WINDOWS
bool schannelSslBackend = StringUtil.ConvertToBoolean(executionContext.Variables.GetValueOrDefault("agent.gituseschannel")?.Value);
executionContext.Debug($"schannelSslBackend={schannelSslBackend}");
// Determine which git will be use
// On windows, we prefer the built-in portable git within the agent's externals folder,
// set system.prefergitfrompath=true can change the behavior, agent will find git.exe from %PATH%
var definitionSetting = executionContext.Variables.GetValueOrDefault("system.prefergitfrompath");
if (definitionSetting != null)
{
preferGitFromPath = StringUtil.ConvertToBoolean(definitionSetting.Value);
}
else
{
bool.TryParse(Environment.GetEnvironmentVariable("system.prefergitfrompath"), out preferGitFromPath);
}
#else
// On Linux, we will always use git find in %PATH% regardless of system.prefergitfrompath
preferGitFromPath = true;
#endif
// Determine do we need to provide creds to git operation
selfManageGitCreds = StringUtil.ConvertToBoolean(executionContext.Variables.GetValueOrDefault("system.selfmanagegitcreds")?.Value);
if (selfManageGitCreds)
{
// Customer choose to own git creds by themselves.
executionContext.Output(StringUtil.Loc("SelfManageGitCreds"));
}
// Initialize git command manager
GitCliManager gitCommandManager = new GitCliManager();
await gitCommandManager.LoadGitExecutionInfo(executionContext, useBuiltInGit: !preferGitFromPath);
bool gitSupportAuthHeader = GitSupportUseAuthHeader(executionContext, gitCommandManager);
// Make sure the build machine met all requirements for the git repository
// For now, the requirement we have are:
// 1. git version greater than 2.9 and git-lfs version greater than 2.1 for on-prem tfsgit
// 2. git version greater than 2.14.2 if use SChannel for SSL backend (Windows only)
RequirementCheck(executionContext, repository, gitCommandManager);
// retrieve credential from endpoint.
ServiceEndpoint endpoint = null;
if (repository.Endpoint != null)
{
// the endpoint should either be the SystemVssConnection (id = guild.empty, name = SystemVssConnection)
// or a real service endpoint to external service which has a real id
endpoint = executionContext.Endpoints.Single(x => (x.Id == Guid.Empty && x.Name == repository.Endpoint.Name) || (x.Id != Guid.Empty && x.Id == repository.Endpoint.Id));
}
string username = string.Empty;
string password = string.Empty;
if (!selfManageGitCreds && endpoint != null && endpoint.Authorization != null)
{
switch (endpoint.Authorization.Scheme)
{
case EndpointAuthorizationSchemes.OAuth:
username = EndpointAuthorizationSchemes.OAuth;
if (!endpoint.Authorization.Parameters.TryGetValue(EndpointAuthorizationParameters.AccessToken, out password))
{
password = string.Empty;
}
break;
case EndpointAuthorizationSchemes.UsernamePassword:
if (!endpoint.Authorization.Parameters.TryGetValue(EndpointAuthorizationParameters.Username, out username))
{
// leave the username as empty, the username might in the url, like: http://username@repository.git
username = string.Empty;
}
if (!endpoint.Authorization.Parameters.TryGetValue(EndpointAuthorizationParameters.Password, out password))
{
// we have username, but no password
password = string.Empty;
}
break;
default:
executionContext.Warning($"Unsupport endpoint authorization schemes: {endpoint.Authorization.Scheme}");
break;
}
}
// prepare credentail embedded urls
repositoryUrlWithCred = UrlUtil.GetCredentialEmbeddedUrl(repositoryUrl, username, password);
var agentProxy = executionContext.GetProxyConfiguration();
if (agentProxy != null && !string.IsNullOrEmpty(agentProxy.ProxyAddress) && !agentProxy.WebProxy.IsBypassed(repositoryUrl))
{
proxyUrlWithCred = UrlUtil.GetCredentialEmbeddedUrl(new Uri(agentProxy.ProxyAddress), agentProxy.ProxyUsername, agentProxy.ProxyPassword);
// uri.absoluteuri will not contains port info if the scheme is http/https and the port is 80/443
// however, git.exe always require you provide port info, if nothing passed in, it will use 1080 as default
// as result, we need prefer the uri.originalstring when it's different than uri.absoluteuri.
if (string.Equals(proxyUrlWithCred.AbsoluteUri, proxyUrlWithCred.OriginalString, StringComparison.OrdinalIgnoreCase))
{
proxyUrlWithCredString = proxyUrlWithCred.AbsoluteUri;
}
else
{
proxyUrlWithCredString = proxyUrlWithCred.OriginalString;
}
}
// prepare askpass for client cert private key, if the repository's endpoint url match the TFS/VSTS url
var systemConnection = executionContext.Endpoints.Single(x => string.Equals(x.Name, WellKnownServiceEndpointNames.SystemVssConnection, StringComparison.OrdinalIgnoreCase));
if (agentCert != null && Uri.Compare(repositoryUrl, systemConnection.Url, UriComponents.SchemeAndServer, UriFormat.Unescaped, StringComparison.OrdinalIgnoreCase) == 0)
{
if (!string.IsNullOrEmpty(agentCert.CACertificateFile))
{
useSelfSignedCACert = true;
}
if (!string.IsNullOrEmpty(agentCert.ClientCertificateFile) &&
!string.IsNullOrEmpty(agentCert.ClientCertificatePrivateKeyFile))
{
useClientCert = true;
// prepare askpass for client cert password
if (!string.IsNullOrEmpty(agentCert.ClientCertificatePassword))
{
clientCertPrivateKeyAskPassFile = Path.Combine(executionContext.Variables["agent.tempdirectory"].Value, $"{Guid.NewGuid()}.sh");
List<string> askPass = new List<string>();
askPass.Add("#!/bin/sh");
askPass.Add($"echo \"{agentCert.ClientCertificatePassword}\"");
File.WriteAllLines(clientCertPrivateKeyAskPassFile, askPass);
#if !OS_WINDOWS
string toolPath = WhichUtil.Which("chmod", true);
string argLine = $"775 {clientCertPrivateKeyAskPassFile}";
executionContext.Command($"chmod {argLine}");
var processInvoker = new ProcessInvoker(executionContext);
processInvoker.OutputDataReceived += (object sender, ProcessDataReceivedEventArgs args) =>
{
if (!string.IsNullOrEmpty(args.Data))
{
executionContext.Output(args.Data);
}
};
processInvoker.ErrorDataReceived += (object sender, ProcessDataReceivedEventArgs args) =>
{
if (!string.IsNullOrEmpty(args.Data))
{
executionContext.Output(args.Data);
}
};
await processInvoker.ExecuteAsync(executionContext.Variables.GetValueOrDefault("system.defaultworkingdirectory")?.Value, toolPath, argLine, null, true, CancellationToken.None);
#endif
}
}
}
if (gitLfsSupport)
{
// Construct git-lfs url
UriBuilder gitLfsUrl = new UriBuilder(repositoryUrlWithCred);
if (gitLfsUrl.Path.EndsWith(".git"))
{
gitLfsUrl.Path = gitLfsUrl.Path + "/info/lfs";
}
else
{
gitLfsUrl.Path = gitLfsUrl.Path + ".git/info/lfs";
}
gitLfsUrlWithCred = gitLfsUrl.Uri;
}
// Check the current contents of the root folder to see if there is already a repo
// If there is a repo, see if it matches the one we are expecting to be there based on the remote fetch url
// if the repo is not what we expect, remove the folder
if (!await IsRepositoryOriginUrlMatch(executionContext, gitCommandManager, targetPath, repositoryUrl))
{
// Delete source folder
IOUtil.DeleteDirectory(targetPath, cancellationToken);
}
else
{
// delete the index.lock file left by previous canceled build or any operation cause git.exe crash last time.
string lockFile = Path.Combine(targetPath, ".git\\index.lock");
if (File.Exists(lockFile))
{
try
{
File.Delete(lockFile);
}
catch (Exception ex)
{
executionContext.Debug($"Unable to delete the index.lock file: {lockFile}");
executionContext.Debug(ex.ToString());
}
}
// delete the shallow.lock file left by previous canceled build or any operation cause git.exe crash last time.
string shallowLockFile = Path.Combine(targetPath, ".git\\shallow.lock");
if (File.Exists(shallowLockFile))
{
try
{
File.Delete(shallowLockFile);
}
catch (Exception ex)
{
executionContext.Debug($"Unable to delete the shallow.lock file: {shallowLockFile}");
executionContext.Debug(ex.ToString());
}
}
// When repo.clean is selected for a git repo, execute git clean -fdx and git reset --hard HEAD on the current repo.
// This will help us save the time to reclone the entire repo.
// If any git commands exit with non-zero return code or any exception happened during git.exe invoke, fall back to delete the repo folder.
if (clean)
{
Boolean softCleanSucceed = true;
// git clean -fdx
int exitCode_clean = await gitCommandManager.GitClean(executionContext, targetPath);
if (exitCode_clean != 0)
{
executionContext.Debug($"'git clean -fdx' failed with exit code {exitCode_clean}, this normally caused by:\n 1) Path too long\n 2) Permission issue\n 3) File in use\nFor futher investigation, manually run 'git clean -fdx' on repo root: {targetPath} after each build.");
softCleanSucceed = false;
}
// git reset --hard HEAD
if (softCleanSucceed)
{
int exitCode_reset = await gitCommandManager.GitReset(executionContext, targetPath);
if (exitCode_reset != 0)
{
executionContext.Debug($"'git reset --hard HEAD' failed with exit code {exitCode_reset}\nFor futher investigation, manually run 'git reset --hard HEAD' on repo root: {targetPath} after each build.");
softCleanSucceed = false;
}
}
// git clean -fdx and git reset --hard HEAD for each submodule
if (checkoutSubmodules)
{
if (softCleanSucceed)
{
int exitCode_submoduleclean = await gitCommandManager.GitSubmoduleClean(executionContext, targetPath);
if (exitCode_submoduleclean != 0)
{
executionContext.Debug($"'git submodule foreach git clean -fdx' failed with exit code {exitCode_submoduleclean}\nFor futher investigation, manually run 'git submodule foreach git clean -fdx' on repo root: {targetPath} after each build.");
softCleanSucceed = false;
}
}
if (softCleanSucceed)
{
int exitCode_submodulereset = await gitCommandManager.GitSubmoduleReset(executionContext, targetPath);
if (exitCode_submodulereset != 0)
{
executionContext.Debug($"'git submodule foreach git reset --hard HEAD' failed with exit code {exitCode_submodulereset}\nFor futher investigation, manually run 'git submodule foreach git reset --hard HEAD' on repo root: {targetPath} after each build.");
softCleanSucceed = false;
}
}
}
if (!softCleanSucceed)
{
//fall back
executionContext.Warning("Unable to run \"git clean -fdx\" and \"git reset --hard HEAD\" successfully, delete source folder instead.");
IOUtil.DeleteDirectory(targetPath, cancellationToken);
}
}
}
// if the folder is missing, create it
if (!Directory.Exists(targetPath))
{
Directory.CreateDirectory(targetPath);
}
// if the folder contains a .git folder, it means the folder contains a git repo that matches the remote url and in a clean state.
// we will run git fetch to update the repo.
if (!Directory.Exists(Path.Combine(targetPath, ".git")))
{
// init git repository
int exitCode_init = await gitCommandManager.GitInit(executionContext, targetPath);
if (exitCode_init != 0)
{
throw new InvalidOperationException($"Unable to use git.exe init repository under {targetPath}, 'git init' failed with exit code: {exitCode_init}");
}
int exitCode_addremote = await gitCommandManager.GitRemoteAdd(executionContext, targetPath, "origin", repositoryUrl.AbsoluteUri);
if (exitCode_addremote != 0)
{
throw new InvalidOperationException($"Unable to use git.exe add remote 'origin', 'git remote add' failed with exit code: {exitCode_addremote}");
}
}
cancellationToken.ThrowIfCancellationRequested();
executionContext.Progress(0, "Starting fetch...");
// disable git auto gc
int exitCode_disableGC = await gitCommandManager.GitDisableAutoGC(executionContext, targetPath);
if (exitCode_disableGC != 0)
{
executionContext.Warning("Unable turn off git auto garbage collection, git fetch operation may trigger auto garbage collection which will affect the performance of fetching.");
}
// always remove any possible left extraheader setting from git config.
if (await gitCommandManager.GitConfigExist(executionContext, targetPath, $"http.{repositoryUrl.AbsoluteUri}.extraheader"))
{
executionContext.Debug("Remove any extraheader setting from git config.");
await RemoveGitConfig(executionContext, gitCommandManager, targetPath, $"http.{repositoryUrl.AbsoluteUri}.extraheader", string.Empty);
}
// always remove any possible left proxy setting from git config, the proxy setting may contains credential
if (await gitCommandManager.GitConfigExist(executionContext, targetPath, $"http.proxy"))
{
executionContext.Debug("Remove any proxy setting from git config.");
await RemoveGitConfig(executionContext, gitCommandManager, targetPath, $"http.proxy", string.Empty);
}
List<string> additionalFetchArgs = new List<string>();
List<string> additionalLfsFetchArgs = new List<string>();
if (!selfManageGitCreds)
{
// v2.9 git support provide auth header as cmdline arg.
// as long 2.9 git exist, VSTS repo, TFS repo and Github repo will use this to handle auth challenge.
if (gitSupportAuthHeader)
{
additionalFetchArgs.Add($"-c http.extraheader=\"AUTHORIZATION: {GenerateAuthHeader(executionContext, username, password)}\"");
}
else
{
// Otherwise, inject credential into fetch/push url
// inject credential into fetch url
executionContext.Debug("Inject credential into git remote url.");
ArgUtil.NotNull(repositoryUrlWithCred, nameof(repositoryUrlWithCred));
// inject credential into fetch url
executionContext.Debug("Inject credential into git remote fetch url.");
int exitCode_seturl = await gitCommandManager.GitRemoteSetUrl(executionContext, targetPath, "origin", repositoryUrlWithCred.AbsoluteUri);
if (exitCode_seturl != 0)
{
throw new InvalidOperationException($"Unable to use git.exe inject credential to git remote fetch url, 'git remote set-url' failed with exit code: {exitCode_seturl}");
}
// inject credential into push url
executionContext.Debug("Inject credential into git remote push url.");
exitCode_seturl = await gitCommandManager.GitRemoteSetPushUrl(executionContext, targetPath, "origin", repositoryUrlWithCred.AbsoluteUri);
if (exitCode_seturl != 0)
{
throw new InvalidOperationException($"Unable to use git.exe inject credential to git remote push url, 'git remote set-url --push' failed with exit code: {exitCode_seturl}");
}
}
// Prepare proxy config for fetch.
if (agentProxy != null && !string.IsNullOrEmpty(agentProxy.ProxyAddress) && !agentProxy.WebProxy.IsBypassed(repositoryUrl))
{
executionContext.Debug($"Config proxy server '{agentProxy.ProxyAddress}' for git fetch.");
ArgUtil.NotNullOrEmpty(proxyUrlWithCredString, nameof(proxyUrlWithCredString));
additionalFetchArgs.Add($"-c http.proxy=\"{proxyUrlWithCredString}\"");
additionalLfsFetchArgs.Add($"-c http.proxy=\"{proxyUrlWithCredString}\"");
}
// Prepare ignore ssl cert error config for fetch.
if (acceptUntrustedCerts)
{
additionalFetchArgs.Add($"-c http.sslVerify=false");
additionalLfsFetchArgs.Add($"-c http.sslVerify=false");
}
// Prepare self-signed CA cert config for fetch from TFS.
if (useSelfSignedCACert)
{
executionContext.Debug($"Use self-signed certificate '{agentCert.CACertificateFile}' for git fetch.");
additionalFetchArgs.Add($"-c http.sslcainfo=\"{agentCert.CACertificateFile}\"");
additionalLfsFetchArgs.Add($"-c http.sslcainfo=\"{agentCert.CACertificateFile}\"");
}
// Prepare client cert config for fetch from TFS.
if (useClientCert)
{
executionContext.Debug($"Use client certificate '{agentCert.ClientCertificateFile}' for git fetch.");
if (!string.IsNullOrEmpty(clientCertPrivateKeyAskPassFile))
{
additionalFetchArgs.Add($"-c http.sslcert=\"{agentCert.ClientCertificateFile}\" -c http.sslkey=\"{agentCert.ClientCertificatePrivateKeyFile}\" -c http.sslCertPasswordProtected=true -c core.askpass=\"{clientCertPrivateKeyAskPassFile}\"");
additionalLfsFetchArgs.Add($"-c http.sslcert=\"{agentCert.ClientCertificateFile}\" -c http.sslkey=\"{agentCert.ClientCertificatePrivateKeyFile}\" -c http.sslCertPasswordProtected=true -c core.askpass=\"{clientCertPrivateKeyAskPassFile}\"");
}
else
{
additionalFetchArgs.Add($"-c http.sslcert=\"{agentCert.ClientCertificateFile}\" -c http.sslkey=\"{agentCert.ClientCertificatePrivateKeyFile}\"");
additionalLfsFetchArgs.Add($"-c http.sslcert=\"{agentCert.ClientCertificateFile}\" -c http.sslkey=\"{agentCert.ClientCertificatePrivateKeyFile}\"");
}
}
#if OS_WINDOWS
if (schannelSslBackend)
{
executionContext.Debug("Use SChannel SslBackend for git fetch.");
additionalFetchArgs.Add("-c http.sslbackend=\"schannel\"");
additionalLfsFetchArgs.Add("-c http.sslbackend=\"schannel\"");
}
#endif
// Prepare gitlfs url for fetch and checkout
if (gitLfsSupport)
{
// Initialize git lfs by execute 'git lfs install'
executionContext.Debug("Setup the local Git hooks for Git LFS.");
int exitCode_lfsInstall = await gitCommandManager.GitLFSInstall(executionContext, targetPath);
if (exitCode_lfsInstall != 0)
{
throw new InvalidOperationException($"Git-lfs installation failed with exit code: {exitCode_lfsInstall}");
}
bool lfsSupportAuthHeader = GitLfsSupportUseAuthHeader(executionContext, gitCommandManager);
if (lfsSupportAuthHeader)
{
string authorityUrl = repositoryUrl.AbsoluteUri.Replace(repositoryUrl.PathAndQuery, string.Empty);
additionalLfsFetchArgs.Add($"-c http.{authorityUrl}.extraheader=\"AUTHORIZATION: {GenerateAuthHeader(executionContext, username, password)}\"");
}
else
{
// Inject credential into lfs fetch/push url
executionContext.Debug("Inject credential into git-lfs remote url.");
ArgUtil.NotNull(gitLfsUrlWithCred, nameof(gitLfsUrlWithCred));
// inject credential into fetch url
executionContext.Debug("Inject credential into git-lfs remote fetch url.");
configModifications["remote.origin.lfsurl"] = gitLfsUrlWithCred.AbsoluteUri;
int exitCode_configlfsurl = await gitCommandManager.GitConfig(executionContext, targetPath, "remote.origin.lfsurl", gitLfsUrlWithCred.AbsoluteUri);
if (exitCode_configlfsurl != 0)
{
throw new InvalidOperationException($"Git config failed with exit code: {exitCode_configlfsurl}");
}
// inject credential into push url
executionContext.Debug("Inject credential into git-lfs remote push url.");
configModifications["remote.origin.lfspushurl"] = gitLfsUrlWithCred.AbsoluteUri;
int exitCode_configlfspushurl = await gitCommandManager.GitConfig(executionContext, targetPath, "remote.origin.lfspushurl", gitLfsUrlWithCred.AbsoluteUri);
if (exitCode_configlfspushurl != 0)
{
throw new InvalidOperationException($"Git config failed with exit code: {exitCode_configlfspushurl}");
}
}
}
}
// If this is a build for a pull request, then include
// the pull request reference as an additional ref.
List<string> additionalFetchSpecs = new List<string>();
if (IsPullRequest(sourceBranch))
{
additionalFetchSpecs.Add("+refs/heads/*:refs/remotes/origin/*");
additionalFetchSpecs.Add(StringUtil.Format("+{0}:{1}", sourceBranch, GetRemoteRefName(sourceBranch)));
}
int exitCode_fetch = await gitCommandManager.GitFetch(executionContext, targetPath, "origin", fetchDepth, additionalFetchSpecs, string.Join(" ", additionalFetchArgs), cancellationToken);
if (exitCode_fetch != 0)
{
throw new InvalidOperationException($"Git fetch failed with exit code: {exitCode_fetch}");
}
// Checkout
// sourceToBuild is used for checkout
// if sourceBranch is a PR branch or sourceVersion is null, make sure branch name is a remote branch. we need checkout to detached head.
// (change refs/heads to refs/remotes/origin, refs/pull to refs/remotes/pull, or leave it as it when the branch name doesn't contain refs/...)
// if sourceVersion provide, just use that for checkout, since when you checkout a commit, it will end up in detached head.
cancellationToken.ThrowIfCancellationRequested();
executionContext.Progress(80, "Starting checkout...");
string sourcesToBuild;
if (IsPullRequest(sourceBranch) || string.IsNullOrEmpty(sourceVersion))
{
sourcesToBuild = GetRemoteRefName(sourceBranch);
}
else
{
sourcesToBuild = sourceVersion;
}
// fetch lfs object upfront, this will avoid fetch lfs object during checkout which cause checkout taking forever
// since checkout will fetch lfs object 1 at a time, while git lfs fetch will fetch lfs object in parallel.
if (gitLfsSupport)
{
int exitCode_lfsFetch = await gitCommandManager.GitLFSFetch(executionContext, targetPath, "origin", sourcesToBuild, string.Join(" ", additionalLfsFetchArgs), cancellationToken);
if (exitCode_lfsFetch != 0)
{
// git lfs fetch failed, get lfs log, the log is critical for debug.
int exitCode_lfsLogs = await gitCommandManager.GitLFSLogs(executionContext, targetPath);
throw new InvalidOperationException($"Git lfs fetch failed with exit code: {exitCode_lfsFetch}. Git lfs logs returned with exit code: {exitCode_lfsLogs}.");
}
}
// Finally, checkout the sourcesToBuild (if we didn't find a valid git object this will throw)
int exitCode_checkout = await gitCommandManager.GitCheckout(executionContext, targetPath, sourcesToBuild, cancellationToken);
if (exitCode_checkout != 0)
{
// local repository is shallow repository, checkout may fail due to lack of commits history.
// this will happen when the checkout commit is older than tip -> fetchDepth
if (fetchDepth > 0)
{
executionContext.Warning(StringUtil.Loc("ShallowCheckoutFail", fetchDepth, sourcesToBuild));
}
throw new InvalidOperationException($"Git checkout failed with exit code: {exitCode_checkout}");
}
// Submodule update
if (checkoutSubmodules)
{
cancellationToken.ThrowIfCancellationRequested();
executionContext.Progress(90, "Updating submodules...");
int exitCode_submoduleSync = await gitCommandManager.GitSubmoduleSync(executionContext, targetPath, checkoutNestedSubmodules, cancellationToken);
if (exitCode_submoduleSync != 0)
{
throw new InvalidOperationException($"Git submodule sync failed with exit code: {exitCode_submoduleSync}");
}
List<string> additionalSubmoduleUpdateArgs = new List<string>();
if (!selfManageGitCreds)
{
if (gitSupportAuthHeader)
{
string authorityUrl = repositoryUrl.AbsoluteUri.Replace(repositoryUrl.PathAndQuery, string.Empty);
additionalSubmoduleUpdateArgs.Add($"-c http.{authorityUrl}.extraheader=\"AUTHORIZATION: {GenerateAuthHeader(executionContext, username, password)}\"");
}
// Prepare proxy config for submodule update.
if (agentProxy != null && !string.IsNullOrEmpty(agentProxy.ProxyAddress) && !agentProxy.WebProxy.IsBypassed(repositoryUrl))
{
executionContext.Debug($"Config proxy server '{agentProxy.ProxyAddress}' for git submodule update.");
ArgUtil.NotNullOrEmpty(proxyUrlWithCredString, nameof(proxyUrlWithCredString));
additionalSubmoduleUpdateArgs.Add($"-c http.proxy=\"{proxyUrlWithCredString}\"");
}
// Prepare ignore ssl cert error config for fetch.
if (acceptUntrustedCerts)
{
additionalSubmoduleUpdateArgs.Add($"-c http.sslVerify=false");
}
// Prepare self-signed CA cert config for submodule update.
if (useSelfSignedCACert)
{
executionContext.Debug($"Use self-signed CA certificate '{agentCert.CACertificateFile}' for git submodule update.");
string authorityUrl = repositoryUrl.AbsoluteUri.Replace(repositoryUrl.PathAndQuery, string.Empty);
additionalSubmoduleUpdateArgs.Add($"-c http.{authorityUrl}.sslcainfo=\"{agentCert.CACertificateFile}\"");
}
// Prepare client cert config for submodule update.
if (useClientCert)
{
executionContext.Debug($"Use client certificate '{agentCert.ClientCertificateFile}' for git submodule update.");
string authorityUrl = repositoryUrl.AbsoluteUri.Replace(repositoryUrl.PathAndQuery, string.Empty);
if (!string.IsNullOrEmpty(clientCertPrivateKeyAskPassFile))
{
additionalSubmoduleUpdateArgs.Add($"-c http.{authorityUrl}.sslcert=\"{agentCert.ClientCertificateFile}\" -c http.{authorityUrl}.sslkey=\"{agentCert.ClientCertificatePrivateKeyFile}\" -c http.{authorityUrl}.sslCertPasswordProtected=true -c core.askpass=\"{clientCertPrivateKeyAskPassFile}\"");
}
else
{
additionalSubmoduleUpdateArgs.Add($"-c http.{authorityUrl}.sslcert=\"{agentCert.ClientCertificateFile}\" -c http.{authorityUrl}.sslkey=\"{agentCert.ClientCertificatePrivateKeyFile}\"");
}
}
#if OS_WINDOWS
if (schannelSslBackend)
{
executionContext.Debug("Use SChannel SslBackend for git submodule update.");
additionalSubmoduleUpdateArgs.Add("-c http.sslbackend=\"schannel\"");
}
#endif
}
int exitCode_submoduleUpdate = await gitCommandManager.GitSubmoduleUpdate(executionContext, targetPath, fetchDepth, string.Join(" ", additionalSubmoduleUpdateArgs), checkoutNestedSubmodules, cancellationToken);
if (exitCode_submoduleUpdate != 0)
{
throw new InvalidOperationException($"Git submodule update failed with exit code: {exitCode_submoduleUpdate}");
}
}
// handle expose creds, related to 'Allow Scripts to Access OAuth Token' option
if (!selfManageGitCreds)
{
if (gitSupportAuthHeader && exposeCred)
{
string configKey = $"http.{repositoryUrl.AbsoluteUri}.extraheader";
string configValue = $"\"AUTHORIZATION: {GenerateAuthHeader(executionContext, username, password)}\"";
configModifications[configKey] = configValue.Trim('\"');
int exitCode_config = await gitCommandManager.GitConfig(executionContext, targetPath, configKey, configValue);
if (exitCode_config != 0)
{
throw new InvalidOperationException($"Git config failed with exit code: {exitCode_config}");
}
}
if (!gitSupportAuthHeader && !exposeCred)
{
// remove cached credential from origin's fetch/push url.
await RemoveCachedCredential(executionContext, gitCommandManager, repositoryUrlWithCred, targetPath, repositoryUrl, "origin");
}
if (exposeCred)
{
// save proxy setting to git config.
if (agentProxy != null && !string.IsNullOrEmpty(agentProxy.ProxyAddress) && !agentProxy.WebProxy.IsBypassed(repositoryUrl))
{
executionContext.Debug($"Save proxy config for proxy server '{agentProxy.ProxyAddress}' into git config.");
ArgUtil.NotNullOrEmpty(proxyUrlWithCredString, nameof(proxyUrlWithCredString));
string proxyConfigKey = "http.proxy";
string proxyConfigValue = $"\"{proxyUrlWithCredString}\"";
configModifications[proxyConfigKey] = proxyConfigValue.Trim('\"');
int exitCode_proxyconfig = await gitCommandManager.GitConfig(executionContext, targetPath, proxyConfigKey, proxyConfigValue);
if (exitCode_proxyconfig != 0)
{
throw new InvalidOperationException($"Git config failed with exit code: {exitCode_proxyconfig}");
}
}
// save ignore ssl cert error setting to git config.
if (acceptUntrustedCerts)
{
executionContext.Debug($"Save ignore ssl cert error config into git config.");
string sslVerifyConfigKey = "http.sslVerify";
string sslVerifyConfigValue = "\"false\"";
configModifications[sslVerifyConfigKey] = sslVerifyConfigValue.Trim('\"');
int exitCode_sslconfig = await gitCommandManager.GitConfig(executionContext, targetPath, sslVerifyConfigKey, sslVerifyConfigValue);
if (exitCode_sslconfig != 0)
{
throw new InvalidOperationException($"Git config failed with exit code: {exitCode_sslconfig}");
}
}
// save CA cert setting to git config.
if (useSelfSignedCACert)
{
executionContext.Debug($"Save CA cert config into git config.");
string sslCaInfoConfigKey = "http.sslcainfo";
string sslCaInfoConfigValue = $"\"{agentCert.CACertificateFile}\"";
configModifications[sslCaInfoConfigKey] = sslCaInfoConfigValue.Trim('\"');
int exitCode_sslconfig = await gitCommandManager.GitConfig(executionContext, targetPath, sslCaInfoConfigKey, sslCaInfoConfigValue);
if (exitCode_sslconfig != 0)
{
throw new InvalidOperationException($"Git config failed with exit code: {exitCode_sslconfig}");
}
}
// save client cert setting to git config.
if (useClientCert)
{
executionContext.Debug($"Save client cert config into git config.");
string sslCertConfigKey = "http.sslcert";
string sslCertConfigValue = $"\"{agentCert.ClientCertificateFile}\"";
string sslKeyConfigKey = "http.sslkey";
string sslKeyConfigValue = $"\"{agentCert.CACertificateFile}\"";
configModifications[sslCertConfigKey] = sslCertConfigValue.Trim('\"');
configModifications[sslKeyConfigKey] = sslKeyConfigValue.Trim('\"');
int exitCode_sslconfig = await gitCommandManager.GitConfig(executionContext, targetPath, sslCertConfigKey, sslCertConfigValue);
if (exitCode_sslconfig != 0)
{
throw new InvalidOperationException($"Git config failed with exit code: {exitCode_sslconfig}");
}
exitCode_sslconfig = await gitCommandManager.GitConfig(executionContext, targetPath, sslKeyConfigKey, sslKeyConfigValue);
if (exitCode_sslconfig != 0)
{
throw new InvalidOperationException($"Git config failed with exit code: {exitCode_sslconfig}");
}
// the client private key has a password
if (!string.IsNullOrEmpty(clientCertPrivateKeyAskPassFile))
{
string sslCertPasswordProtectedConfigKey = "http.sslcertpasswordprotected";
string sslCertPasswordProtectedConfigValue = "true";
string askPassConfigKey = "core.askpass";
string askPassConfigValue = $"\"{clientCertPrivateKeyAskPassFile}\"";
configModifications[sslCertPasswordProtectedConfigKey] = sslCertPasswordProtectedConfigValue.Trim('\"');
configModifications[askPassConfigKey] = askPassConfigValue.Trim('\"');
exitCode_sslconfig = await gitCommandManager.GitConfig(executionContext, targetPath, sslCertPasswordProtectedConfigKey, sslCertPasswordProtectedConfigValue);
if (exitCode_sslconfig != 0)
{
throw new InvalidOperationException($"Git config failed with exit code: {exitCode_sslconfig}");
}
exitCode_sslconfig = await gitCommandManager.GitConfig(executionContext, targetPath, askPassConfigKey, askPassConfigValue);
if (exitCode_sslconfig != 0)
{
throw new InvalidOperationException($"Git config failed with exit code: {exitCode_sslconfig}");
}
}
}
}
if (gitLfsSupport)
{
bool lfsSupportAuthHeader = GitLfsSupportUseAuthHeader(executionContext, gitCommandManager);
if (lfsSupportAuthHeader && exposeCred)
{
string configKey = $"http.{repositoryUrl.AbsoluteUri}.extraheader";
string configValue = $"\"AUTHORIZATION: {GenerateAuthHeader(executionContext, username, password)}\"";
configModifications[configKey] = configValue.Trim('\"');
int exitCode_config = await gitCommandManager.GitConfig(executionContext, targetPath, configKey, configValue);
if (exitCode_config != 0)
{
throw new InvalidOperationException($"Git config failed with exit code: {exitCode_config}");
}
}
if (!lfsSupportAuthHeader && !exposeCred)
{
// remove cached credential from origin's lfs fetch/push url.
executionContext.Debug("Remove git-lfs fetch and push url setting from git config.");
await RemoveGitConfig(executionContext, gitCommandManager, targetPath, "remote.origin.lfsurl", gitLfsUrlWithCred.AbsoluteUri);
configModifications.Remove("remote.origin.lfsurl");
await RemoveGitConfig(executionContext, gitCommandManager, targetPath, "remote.origin.lfspushurl", gitLfsUrlWithCred.AbsoluteUri);
configModifications.Remove("remote.origin.lfspushurl");
}
}
if (useClientCert && !string.IsNullOrEmpty(clientCertPrivateKeyAskPassFile) && !exposeCred)
{
executionContext.Debug("Remove git.sslkey askpass file.");
IOUtil.DeleteFile(clientCertPrivateKeyAskPassFile);
}
}
// Set intra-task variable for post job cleanup
if (selfManageGitCreds)
{
// no needs to cleanup creds, since customer choose to manage creds themselves.
executionContext.SetTaskVariable("cleanupcreds", "false");
}
if (preferGitFromPath)
{
// use git from PATH
executionContext.SetTaskVariable("preferPath", "true");
}
if (repositoryUrlWithCred != null)
{
executionContext.SetTaskVariable("repoUrlWithCred", repositoryUrlWithCred.AbsoluteUri, true);
}
if (configModifications.Count > 0)
{
executionContext.SetTaskVariable("modifiedgitconfig", JsonUtility.ToString(configModifications), true);
}
if (useClientCert && !string.IsNullOrEmpty(clientCertPrivateKeyAskPassFile))
{
executionContext.SetTaskVariable("clientCertAskPass", clientCertPrivateKeyAskPassFile);
}
}
public async Task PostJobCleanupAsync(AgentTaskPluginExecutionContext executionContext, Pipelines.RepositoryResource repository)