public TrackingConfig PrepareDirectory(
IExecutionContext executionContext,
ServiceEndpoint endpoint,
ISourceProvider sourceProvider)
{
// Validate parameters.
Trace.Entering();
ArgUtil.NotNull(executionContext, nameof(executionContext));
ArgUtil.NotNull(executionContext.Variables, nameof(executionContext.Variables));
ArgUtil.NotNull(endpoint, nameof(endpoint));
ArgUtil.NotNull(sourceProvider, nameof(sourceProvider));
var trackingManager = HostContext.GetService <ITrackingManager>();
// Defer to the source provider to calculate the hash key.
Trace.Verbose("Calculating build directory hash key.");
string hashKey = sourceProvider.GetBuildDirectoryHashKey(executionContext, endpoint);
Trace.Verbose($"Hash key: {hashKey}");
// Load the existing tracking file if one already exists.
string trackingFile = Path.Combine(
HostContext.GetDirectory(WellKnownDirectory.Work),
Constants.Build.Path.SourceRootMappingDirectory,
executionContext.Variables.System_CollectionId,
executionContext.Variables.System_DefinitionId,
Constants.Build.Path.TrackingConfigFile);
Trace.Verbose($"Loading tracking config if exists: {trackingFile}");
TrackingConfigBase existingConfig = trackingManager.LoadIfExists(executionContext, trackingFile);
// Check if the build needs to be garbage collected. If the hash key
// has changed, then the existing build directory cannot be reused.
TrackingConfigBase garbageConfig = null;
if (existingConfig != null &&
!string.Equals(existingConfig.HashKey, hashKey, StringComparison.OrdinalIgnoreCase))
{
// Just store a reference to the config for now. It can safely be
// marked for garbage collection only after the new build directory
// config has been created.
Trace.Verbose($"Hash key from existing tracking config does not match. Existing key: {existingConfig.HashKey}");
garbageConfig = existingConfig;
existingConfig = null;
}
// Create a new tracking config if required.
TrackingConfig newConfig;
if (existingConfig == null)
{
Trace.Verbose("Creating a new tracking config file.");
newConfig = trackingManager.Create(
executionContext,
endpoint,
hashKey,
trackingFile,
sourceProvider.TestOverrideBuildDirectory());
ArgUtil.NotNull(newConfig, nameof(newConfig));
}
else
{
// Convert legacy format to the new format if required.
newConfig = ConvertToNewFormat(executionContext, endpoint, existingConfig);
// Fill out repository type if it's not there.
// repository type is a new property introduced for maintenance job
if (string.IsNullOrEmpty(newConfig.RepositoryType))
{
newConfig.RepositoryType = endpoint.Type;
}
// For existing tracking config files, update the job run properties.
Trace.Verbose("Updating job run properties.");
trackingManager.UpdateJobRunProperties(executionContext, newConfig, trackingFile);
}
// Mark the old configuration for garbage collection.
if (garbageConfig != null)
{
Trace.Verbose("Marking existing config for garbage collection.");
trackingManager.MarkForGarbageCollection(executionContext, garbageConfig);
}
// Prepare the build directory.
// There are 2 ways to provide build directory clean policy.
// 1> set definition variable build.clean or agent.clean.buildDirectory. (on-prem user need to use this, since there is no Web UI in TFS 2016)
// 2> select source clean option in definition repository tab. (VSTS will have this option in definition designer UI)
BuildCleanOption cleanOption = GetBuildDirectoryCleanOption(executionContext, endpoint);
CreateDirectory(
executionContext,
description: "build directory",
path: Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Work), newConfig.BuildDirectory),
deleteExisting: cleanOption == BuildCleanOption.All);
CreateDirectory(
executionContext,
description: "artifacts directory",
path: Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Work), newConfig.ArtifactsDirectory),
deleteExisting: true);
CreateDirectory(
executionContext,
description: "test results directory",
path: Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Work), newConfig.TestResultsDirectory),
deleteExisting: true);
CreateDirectory(
executionContext,
description: "binaries directory",
path: Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Work), newConfig.BuildDirectory, Constants.Build.Path.BinariesDirectory),
deleteExisting: cleanOption == BuildCleanOption.Binary);
CreateDirectory(
executionContext,
description: "source directory",
path: Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Work), newConfig.BuildDirectory, Constants.Build.Path.SourcesDirectory),
deleteExisting: cleanOption == BuildCleanOption.Source);
return(newConfig);
}