/// <summary>
/// Ensures that the sources of an <see cref="Asset"/> exist.
/// </summary>
/// <param name="result">The <see cref="AssetCompilerResult"/> in which to output log of potential errors.</param>
/// <param name="assetItem">The asset to check.</param>
/// <returns><c>true</c> if the source file exists, <c>false</c> otherwise.</returns>
/// <exception cref="ArgumentNullException">Any of the argument is <c>null</c>.</exception>
private static bool EnsureSourcesExist(AssetCompilerResult result, AssetItem assetItem)
{
if (result == null)
{
throw new ArgumentNullException(nameof(result));
}
if (assetItem == null)
{
throw new ArgumentNullException(nameof(assetItem));
}
var collector = new SourceFilesCollector();
var sourceMembers = collector.GetSourceMembers(assetItem.Asset);
foreach (var member in sourceMembers)
{
if (string.IsNullOrEmpty(member.Value))
{
result.Error($"Source is null for Asset [{assetItem}] in property [{member.Key}]");
return(false);
}
// Get absolute path of asset source on disk
var assetDirectory = assetItem.FullPath.GetParent();
var assetSource = UPath.Combine(assetDirectory, member.Value);
// Ensure the file exists
if (!File.Exists(assetSource))
{
result.Error($"Unable to find the source file '{assetSource}' for Asset [{assetItem}]");
return(false);
}
}
return(true);
}
/// <summary>
/// Compile the required build step necessary to produce the desired output item.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="compilationResult">The compilation result.</param>
/// <param name="assetItem">The asset item.</param>
public ListBuildStep CompileItem(AssetCompilerContext context, AssetCompilerResult compilationResult, AssetItem assetItem)
{
// First try to find an asset compiler for this particular asset.
IAssetCompiler compiler;
try
{
compiler = compilerRegistry.GetCompiler(assetItem.Asset.GetType(), compilationContext);
}
catch (Exception ex)
{
compilationResult.Error($"Cannot find a compiler for asset [{assetItem.Id}] from path [{assetItem.Location}]", ex);
return(null);
}
if (compiler == null)
{
return(null);
}
// Second we are compiling the asset (generating a build step)
try
{
var resultPerAssetType = compiler.Prepare(context, assetItem);
// Raise the AssetCompiled event.
AssetCompiled?.Invoke(this, new AssetCompiledArgs(assetItem, resultPerAssetType));
// TODO: See if this can be unified with PackageBuilder.BuildStepProcessed
var assetFullPath = assetItem.FullPath.ToWindowsPath();
foreach (var message in resultPerAssetType.Messages)
{
var assetMessage = AssetLogMessage.From(null, assetItem.ToReference(), message, assetFullPath);
// Forward log messages to compilationResult
compilationResult.Log(assetMessage);
// Forward log messages to build step logger
resultPerAssetType.BuildSteps.Logger.Log(assetMessage);
}
// Make the build step fail if there was an error during compiling (only when we are compiling the build steps of an asset)
if (resultPerAssetType.BuildSteps is AssetBuildStep && resultPerAssetType.BuildSteps.Logger.HasErrors)
{
resultPerAssetType.BuildSteps.Add(new CommandBuildStep(new FailedCommand(assetItem.Location)));
}
// TODO: Big review of the log infrastructure of CompilerApp & BuildEngine!
// Assign module string to all command build steps
SetAssetLogger(resultPerAssetType.BuildSteps, assetItem.Package, assetItem.ToReference(), assetItem.FullPath.ToWindowsPath());
foreach (var buildStep in resultPerAssetType.BuildSteps)
{
buildStep.Priority = latestPriority++;
}
// Add the item result build steps the item list result build steps
return(resultPerAssetType.BuildSteps);
}
catch (Exception ex)
{
compilationResult.Error($"Unexpected exception while compiling asset [{assetItem.Id}] from path [{assetItem.Location}]", ex);
return(null);
}
}
private void Prepare(AssetCompilerResult finalResult, AssetCompilerContext context, AssetItem assetItem, [NotNull] Type compilationContext, HashSet <BuildAssetNode> visitedItems, Dictionary <AssetId, BuildStep> compiledItems, BuildStep parentBuildStep = null,
BuildDependencyType dependencyType = BuildDependencyType.Runtime)
{
if (compilationContext == null)
{
throw new ArgumentNullException(nameof(compilationContext));
}
var assetNode = BuildDependencyManager.FindOrCreateNode(assetItem, compilationContext);
compiledItems.TryGetValue(assetNode.AssetItem.Id, out var assetBuildSteps);
// Prevent re-entrancy in the same node
if (visitedItems.Add(assetNode))
{
assetNode.Analyze(context);
// Invoke the compiler to prepare the build step for this asset if the dependency needs to compile it (Runtime or CompileContent)
if ((dependencyType & ~BuildDependencyType.CompileAsset) != 0 && assetBuildSteps == null)
{
var mainCompiler = BuildDependencyManager.AssetCompilerRegistry.GetCompiler(assetItem.Asset.GetType(), assetNode.CompilationContext);
if (mainCompiler == null)
{
return;
}
var compilerResult = mainCompiler.Prepare(context, assetItem);
if ((dependencyType & BuildDependencyType.Runtime) == BuildDependencyType.Runtime && compilerResult.HasErrors) //allow Runtime dependencies to fail
{
assetBuildSteps = new ErrorBuildStep(assetItem, compilerResult.Messages);
}
else
{
assetBuildSteps = compilerResult.BuildSteps;
compiledItems.Add(assetNode.AssetItem.Id, assetBuildSteps);
// Copy the log to the final result (note: this does not copy or forward the build steps)
compilerResult.CopyTo(finalResult);
if (compilerResult.HasErrors)
{
finalResult.Error($"Failed to prepare asset {assetItem.Location}");
return;
}
}
// Add the resulting build steps to the final
finalResult.BuildSteps.Add(assetBuildSteps);
AssetCompiled?.Invoke(this, new AssetCompiledArgs(assetItem, compilerResult));
}
// Go through the dependencies of the node and prepare them as well
foreach (var reference in assetNode.References)
{
var target = reference.Target;
Prepare(finalResult, context, target.AssetItem, target.CompilationContext, visitedItems, compiledItems, assetBuildSteps, reference.DependencyType);
if (finalResult.HasErrors)
{
return;
}
}
// If we didn't prepare any build step for this asset let's exit here.
if (assetBuildSteps == null)
{
return;
}
}
// Link the created build steps to their parent step.
if (parentBuildStep != null && assetBuildSteps != null && (dependencyType & BuildDependencyType.CompileContent) == BuildDependencyType.CompileContent) //only if content is required Content.Load
{
BuildStep.LinkBuildSteps(assetBuildSteps, parentBuildStep);
}
}