private List <PortableExecutableReference> BuildReferenceSet(List <string> resolvedLocations,
string[] manifestResoureNames,
string manifestResourcePrefix,
FunctionCompiler.TargetEnum target)
{
// Add our references - if the reference is to a library that forms part of NET Standard 2.0 then make sure we add
// the reference from the embedded NET Standard reference set - although our target is NET Standard the assemblies
// in the output folder of the Function App may be NET Core assemblies.
List <PortableExecutableReference> references = resolvedLocations.Select(x =>
{
if (target == FunctionCompiler.TargetEnum.NETStandard20)
{
string assemblyFilename = Path.GetFileName(x);
string manifestResourceName =
manifestResoureNames.SingleOrDefault(m =>
String.Equals(assemblyFilename, m, StringComparison.CurrentCultureIgnoreCase));
if (manifestResourceName != null)
{
using (Stream lib = GetType().Assembly
.GetManifestResourceStream(String.Concat(manifestResourcePrefix, manifestResourceName)))
{
return(MetadataReference.CreateFromStream(lib));
}
}
}
return(MetadataReference.CreateFromFile(x));
}).ToList();
if (target == FunctionCompiler.TargetEnum.NETStandard20)
{
using (Stream netStandard = GetType().Assembly
.GetManifestResourceStream("FunctionMonkey.Compiler.references.netstandard2._0.netstandard.dll"))
{
references.Add(MetadataReference.CreateFromStream(netStandard));
}
using (Stream netStandard = GetType().Assembly
.GetManifestResourceStream("FunctionMonkey.Compiler.references.netstandard2._0.System.Runtime.dll"))
{
references.Add(MetadataReference.CreateFromStream(netStandard));
}
using (Stream systemIo = GetType().Assembly
.GetManifestResourceStream(String.Concat(manifestResourcePrefix, "System.IO.dll")))
{
references.Add(MetadataReference.CreateFromStream(systemIo));
}
}
return(references);
}
public void Compile(IReadOnlyCollection <AbstractFunctionDefinition> functionDefinitions,
Type functionAppConfigurationType,
string newAssemblyNamespace,
IReadOnlyCollection <string> externalAssemblyLocations,
string outputBinaryFolder,
string assemblyName,
OpenApiOutputModel openApiOutputModel,
FunctionCompiler.TargetEnum target,
string outputAuthoredSourceFolder = null)
{
HandlebarsHelperRegistration.RegisterHelpers();
IReadOnlyCollection <SyntaxTree> syntaxTrees = CompileSource(functionDefinitions,
openApiOutputModel,
functionAppConfigurationType,
newAssemblyNamespace,
outputAuthoredSourceFolder);
CompileAssembly(syntaxTrees, externalAssemblyLocations, openApiOutputModel, outputBinaryFolder, assemblyName, newAssemblyNamespace, target);
}
static void Main(string[] args)
{
if (args.Length == 0)
{
throw new ArgumentException("Must specify the assembly file to build the functions from");
}
string inputAssemblyFile = args[0];
FunctionCompiler.TargetEnum target = FunctionCompiler.TargetEnum.NETStandard20;
if (args.Any(x => x.ToLower() == "--netcore21"))
{
target = FunctionCompiler.TargetEnum.NETCore21;
}
// TODO: convert the input to an absolute path if necessary
Assembly assembly = AssemblyLoadContext.Default.LoadFromAssemblyPath(inputAssemblyFile);
string outputBinaryDirectory = Path.GetDirectoryName(assembly.Location);
// Not sure why the AssemblyLoadContext doesn't deal with the below. I thought it did. Clearly not.
// TODO: Have a chat with someone who knows a bit more about this.
AssemblyLoadContext.Default.Resolving += (context, name) =>
{
string path = Path.Combine(outputBinaryDirectory, $"{name.Name}.dll");
//string path = $"{outputBinaryDirectory}\\{name.Name}.dll";
if (File.Exists(path))
{
Assembly referencedAssembly = context.LoadFromAssemblyPath(path);
return(referencedAssembly);
}
return(null);
};
FunctionCompiler compiler = new FunctionCompiler(assembly, outputBinaryDirectory, target);
compiler.Compile();
}
private static IReadOnlyCollection <string> BuildCandidateReferenceList(IReadOnlyCollection <string> externalAssemblyLocations, FunctionCompiler.TargetEnum target)
{
// These are assemblies that Roslyn requires from usage within the template
HashSet <string> locations = new HashSet <string>
{
typeof(Runtime).GetTypeInfo().Assembly.Location,
typeof(IStreamCommand).Assembly.Location,
typeof(AzureFromTheTrenches.Commanding.Abstractions.ICommand).GetTypeInfo().Assembly.Location,
typeof(Abstractions.ISerializer).GetTypeInfo().Assembly.Location,
typeof(System.Net.Http.HttpMethod).GetTypeInfo().Assembly.Location,
typeof(System.Net.HttpStatusCode).GetTypeInfo().Assembly.Location,
typeof(HttpRequest).Assembly.Location,
typeof(JsonConvert).GetTypeInfo().Assembly.Location,
typeof(OkObjectResult).GetTypeInfo().Assembly.Location,
typeof(IActionResult).GetTypeInfo().Assembly.Location,
typeof(FunctionNameAttribute).GetTypeInfo().Assembly.Location,
typeof(ILogger).GetTypeInfo().Assembly.Location,
typeof(IServiceProvider).GetTypeInfo().Assembly.Location,
typeof(IHeaderDictionary).GetTypeInfo().Assembly.Location,
typeof(StringValues).GetTypeInfo().Assembly.Location,
typeof(ExecutionContext).GetTypeInfo().Assembly.Location,
typeof(Document).GetTypeInfo().Assembly.Location,
typeof(Message).GetTypeInfo().Assembly.Location,
typeof(ChangeFeedProcessorBuilder).Assembly.Location,
typeof(CosmosDBAttribute).Assembly.Location,
typeof(TimerInfo).Assembly.Location,
typeof(DbConnectionStringBuilder).Assembly.Location,
typeof(AzureSignalRAuthClient).Assembly.Location,
typeof(System.Environment).Assembly.Location,
typeof(HttpTriggerAttribute).Assembly.Location,
typeof(ServiceBusAttribute).Assembly.Location,
typeof(QueueAttribute).Assembly.Location,
typeof(Microsoft.IdentityModel.Protocols.HttpDocumentRetriever).Assembly.Location
};
if (target == FunctionCompiler.TargetEnum.NETCore21)
{
// we're a 2.1 assembly so we can use our assemblies
Assembly[] currentAssemblies = AppDomain.CurrentDomain.GetAssemblies();
locations.Add(currentAssemblies.Single(x => x.GetName().Name == "netstandard").Location);
locations.Add(currentAssemblies.Single(x => x.GetName().Name == "System.Runtime").Location); // System.Runtime
locations.Add(typeof(TargetFrameworkAttribute).Assembly.Location); // NetCoreLib
locations.Add(typeof(System.Linq.Enumerable).Assembly.Location); // System.Linq
locations.Add(typeof(System.Security.Claims.ClaimsPrincipal).Assembly.Location);
locations.Add(typeof(System.Uri).Assembly.Location);
locations.Add(currentAssemblies.Single(x => x.GetName().Name == "System.Collections").Location);
locations.Add(currentAssemblies.Single(x => x.GetName().Name == "System.Threading").Location);
}
foreach (string externalAssemblyLocation in externalAssemblyLocations)
{
locations.Add(externalAssemblyLocation);
}
return(locations);
}
private void CompileAssembly(IReadOnlyCollection <SyntaxTree> syntaxTrees,
IReadOnlyCollection <string> externalAssemblyLocations,
OpenApiOutputModel openApiOutputModel,
string outputBinaryFolder,
string outputAssemblyName,
string assemblyNamespace,
FunctionCompiler.TargetEnum target)
{
IReadOnlyCollection <string> locations = BuildCandidateReferenceList(externalAssemblyLocations, target);
const string manifestResourcePrefix = "FunctionMonkey.Compiler.references.netstandard2._0.";
// For each assembly we've found we need to check and see if it is already included in the output binary folder
// If it is then its referenced already by the function host and so we add a reference to that version.
List <string> resolvedLocations = ResolveLocationsWithExistingReferences(outputBinaryFolder, locations);
string[] manifestResoureNames = GetType().Assembly.GetManifestResourceNames()
.Where(x => x.StartsWith(manifestResourcePrefix))
.Select(x => x.Substring(manifestResourcePrefix.Length))
.ToArray();
List <PortableExecutableReference> references = BuildReferenceSet(resolvedLocations, manifestResoureNames, manifestResourcePrefix, target);
CSharpCompilation compilation = CSharpCompilation.Create(outputAssemblyName,
syntaxTrees,
references,
new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary));
List <ResourceDescription> resources = null;
if (openApiOutputModel != null)
{
resources = new List <ResourceDescription>();
Debug.Assert(openApiOutputModel.OpenApiSpecification != null);
resources.Add(new ResourceDescription($"{assemblyNamespace}.OpenApi.{openApiOutputModel.OpenApiSpecification.Filename}",
() => new MemoryStream(Encoding.UTF8.GetBytes(openApiOutputModel.OpenApiSpecification.Content)), true));
if (openApiOutputModel.SwaggerUserInterface != null)
{
foreach (OpenApiFileReference fileReference in openApiOutputModel.SwaggerUserInterface)
{
OpenApiFileReference closureCapturedFileReference = fileReference;
resources.Add(new ResourceDescription($"{assemblyNamespace}.OpenApi.{closureCapturedFileReference.Filename}",
() => new MemoryStream(Encoding.UTF8.GetBytes(closureCapturedFileReference.Content)), true));
}
}
}
using (Stream stream = new FileStream(Path.Combine(outputBinaryFolder, outputAssemblyName), FileMode.Create))
{
EmitResult result = compilation.Emit(stream, manifestResources: resources);
if (!result.Success)
{
IEnumerable <Diagnostic> failures = result.Diagnostics.Where(diagnostic =>
diagnostic.IsWarningAsError ||
diagnostic.Severity == DiagnosticSeverity.Error);
StringBuilder messageBuilder = new StringBuilder();
foreach (Diagnostic diagnostic in failures)
{
messageBuilder.AppendFormat("{0}:{1} {2}", diagnostic.Id, diagnostic.GetMessage(), diagnostic.Location.ToString());
}
throw new ConfigurationException(messageBuilder.ToString());
}
}
}