Merge pull request #5681 from ethereum/limitOutput

Do not compile unless requested.

2 files changed, 100 insertions, 20 deletions

diff --git a/libsolidity/interface/CompilerStack.cpp b/libsolidity/interface/CompilerStack.cpp
index adfb94bd..f9d889e7 100644
--- a/libsolidity/interface/CompilerStack.cpp
+++ b/libsolidity/interface/CompilerStack.cpp
@@ -389,18 +389,27 @@ string const CompilerStack::lastContractName() const
 
 eth::AssemblyItems const* CompilerStack::assemblyItems(string const& _contractName) const
 {
+	if (m_stackState != CompilationSuccessful)
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Compilation was not successful."));
+
 	Contract const& currentContract = contract(_contractName);
 	return currentContract.compiler ? &contract(_contractName).compiler->assemblyItems() : nullptr;
 }
 
 eth::AssemblyItems const* CompilerStack::runtimeAssemblyItems(string const& _contractName) const
 {
+	if (m_stackState != CompilationSuccessful)
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Compilation was not successful."));
+
 	Contract const& currentContract = contract(_contractName);
 	return currentContract.compiler ? &contract(_contractName).compiler->runtimeAssemblyItems() : nullptr;
 }
 
 string const* CompilerStack::sourceMapping(string const& _contractName) const
 {
+	if (m_stackState != CompilationSuccessful)
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Compilation was not successful."));
+
 	Contract const& c = contract(_contractName);
 	if (!c.sourceMapping)
 	{
@@ -412,6 +421,9 @@ string const* CompilerStack::sourceMapping(string const& _contractName) const
 
 string const* CompilerStack::runtimeSourceMapping(string const& _contractName) const
 {
+	if (m_stackState != CompilationSuccessful)
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Compilation was not successful."));
+
 	Contract const& c = contract(_contractName);
 	if (!c.runtimeSourceMapping)
 	{
@@ -447,17 +459,26 @@ std::string const CompilerStack::filesystemFriendlyName(string const& _contractN
 
 eth::LinkerObject const& CompilerStack::object(string const& _contractName) const
 {
+	if (m_stackState != CompilationSuccessful)
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Compilation was not successful."));
+
 	return contract(_contractName).object;
 }
 
 eth::LinkerObject const& CompilerStack::runtimeObject(string const& _contractName) const
 {
+	if (m_stackState != CompilationSuccessful)
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Compilation was not successful."));
+
 	return contract(_contractName).runtimeObject;
 }
 
 /// FIXME: cache this string
 string CompilerStack::assemblyString(string const& _contractName, StringMap _sourceCodes) const
 {
+	if (m_stackState != CompilationSuccessful)
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Compilation was not successful."));
+
 	Contract const& currentContract = contract(_contractName);
 	if (currentContract.compiler)
 		return currentContract.compiler->assemblyString(_sourceCodes);
@@ -468,6 +489,9 @@ string CompilerStack::assemblyString(string const& _contractName, StringMap _sou
 /// FIXME: cache the JSON
 Json::Value CompilerStack::assemblyJSON(string const& _contractName, StringMap _sourceCodes) const
 {
+	if (m_stackState != CompilationSuccessful)
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Compilation was not successful."));
+
 	Contract const& currentContract = contract(_contractName);
 	if (currentContract.compiler)
 		return currentContract.compiler->assemblyJSON(_sourceCodes);
@@ -494,13 +518,16 @@ map<string, unsigned> CompilerStack::sourceIndices() const
 
 Json::Value const& CompilerStack::contractABI(string const& _contractName) const
 {
+	if (m_stackState < AnalysisSuccessful)
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Analysis was not successful."));
+
 	return contractABI(contract(_contractName));
 }
 
 Json::Value const& CompilerStack::contractABI(Contract const& _contract) const
 {
 	if (m_stackState < AnalysisSuccessful)
-		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Parsing was not successful."));
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Analysis was not successful."));
 
 	solAssert(_contract.contract, "");
 
@@ -513,13 +540,16 @@ Json::Value const& CompilerStack::contractABI(Contract const& _contract) const
 
 Json::Value const& CompilerStack::natspecUser(string const& _contractName) const
 {
+	if (m_stackState < AnalysisSuccessful)
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Analysis was not successful."));
+
 	return natspecUser(contract(_contractName));
 }
 
 Json::Value const& CompilerStack::natspecUser(Contract const& _contract) const
 {
 	if (m_stackState < AnalysisSuccessful)
-		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Parsing was not successful."));
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Analysis was not successful."));
 
 	solAssert(_contract.contract, "");
 
@@ -532,13 +562,16 @@ Json::Value const& CompilerStack::natspecUser(Contract const& _contract) const
 
 Json::Value const& CompilerStack::natspecDev(string const& _contractName) const
 {
+	if (m_stackState < AnalysisSuccessful)
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Analysis was not successful."));
+
 	return natspecDev(contract(_contractName));
 }
 
 Json::Value const& CompilerStack::natspecDev(Contract const& _contract) const
 {
 	if (m_stackState < AnalysisSuccessful)
-		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Parsing was not successful."));
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Analysis was not successful."));
 
 	solAssert(_contract.contract, "");
 
@@ -551,6 +584,9 @@ Json::Value const& CompilerStack::natspecDev(Contract const& _contract) const
 
 Json::Value CompilerStack::methodIdentifiers(string const& _contractName) const
 {
+	if (m_stackState < AnalysisSuccessful)
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Analysis was not successful."));
+
 	Json::Value methodIdentifiers(Json::objectValue);
 	for (auto const& it: contractDefinition(_contractName).interfaceFunctions())
 		methodIdentifiers[it.second->externalSignature()] = it.first.hex();
@@ -583,8 +619,8 @@ SourceUnit const& CompilerStack::ast(string const& _sourceName) const
 
 ContractDefinition const& CompilerStack::contractDefinition(string const& _contractName) const
 {
-	if (m_stackState != CompilationSuccessful)
-		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Compilation was not successful."));
+	if (m_stackState < AnalysisSuccessful)
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Analysis was not successful."));
 
 	return *contract(_contractName).contract;
 }
@@ -594,6 +630,9 @@ size_t CompilerStack::functionEntryPoint(
 	FunctionDefinition const& _function
 ) const
 {
+	if (m_stackState != CompilationSuccessful)
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Compilation was not successful."));
+
 	shared_ptr<Compiler> const& compiler = contract(_contractName).compiler;
 	if (!compiler)
 		return 0;
@@ -936,6 +975,9 @@ bytes CompilerStack::createCBORMetadata(string const& _metadata, bool _experimen
 
 string CompilerStack::computeSourceMapping(eth::AssemblyItems const& _items) const
 {
+	if (m_stackState != CompilationSuccessful)
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Compilation was not successful."));
+
 	string ret;
 	map<string, unsigned> sourceIndicesMap = sourceIndices();
 	int prevStart = -1;
@@ -1022,6 +1064,9 @@ Json::Value gasToJson(GasEstimator::GasConsumption const& _gas)
 
 Json::Value CompilerStack::gasEstimates(string const& _contractName) const
 {
+	if (m_stackState != CompilationSuccessful)
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Compilation was not successful."));
+
 	if (!assemblyItems(_contractName) && !runtimeAssemblyItems(_contractName))
 		return Json::Value();
 
diff --git a/libsolidity/interface/StandardCompiler.cpp b/libsolidity/interface/StandardCompiler.cpp
index e99b1324..137a4439 100644
--- a/libsolidity/interface/StandardCompiler.cpp
+++ b/libsolidity/interface/StandardCompiler.cpp
@@ -28,6 +28,7 @@
 #include <libdevcore/JSON.h>
 #include <libdevcore/Keccak256.h>
 
+#include <boost/algorithm/cxx11/any_of.hpp>
 #include <boost/algorithm/string.hpp>
 #include <boost/optional.hpp>
 #include <algorithm>
@@ -191,6 +192,31 @@ bool isArtifactRequested(Json::Value const& _outputSelection, string const& _fil
 	return false;
 }
 
+/// @returns true if any binary was requested, i.e. we actually have to perform compilation.
+bool isBinaryRequested(Json::Value const& _outputSelection)
+{
+	if (!_outputSelection.isObject())
+		return false;
+
+	// This does not inculde "evm.methodIdentifiers" on purpose!
+	static vector<string> const outputsThatRequireBinaries{
+		"*",
+		"metadata", // This is only generated at the end of compilation, but could be generated earlier.
+		"evm.deployedBytecode", "evm.deployedBytecode.object", "evm.deployedBytecode.opcodes",
+		"evm.deployedBytecode.sourceMap", "evm.deployedBytecode.linkReferences",
+		"evm.bytecode", "evm.bytecode.object", "evm.bytecode.opcodes", "evm.bytecode.sourceMap",
+		"evm.bytecode.linkReferences",
+		"evm.gasEstimates", "evm.legacyAssembly", "evm.assembly"
+	};
+
+	for (auto const& fileRequests: _outputSelection)
+		for (auto const& requests: fileRequests)
+			for (auto const& output: outputsThatRequireBinaries)
+				if (isArtifactRequested(requests, output))
+					return true;
+	return false;
+}
+
 Json::Value formatLinkReferences(std::map<size_t, std::string> const& linkReferences)
 {
 	Json::Value ret(Json::objectValue);
@@ -564,9 +590,14 @@ Json::Value StandardCompiler::compileInternal(Json::Value const& _input)
 
 	m_compilerStack.setRequestedContractNames(requestedContractNames(outputSelection));
 
+	bool const binariesRequested = isBinaryRequested(outputSelection);
+
 	try
 	{
-		m_compilerStack.compile();
+		if (binariesRequested)
+			m_compilerStack.compile();
+		else
+			m_compilerStack.parseAndAnalyze();
 
 		for (auto const& error: m_compilerStack.errors())
 		{
@@ -655,7 +686,7 @@ Json::Value StandardCompiler::compileInternal(Json::Value const& _input)
 	bool const compilationSuccess = m_compilerStack.state() == CompilerStack::State::CompilationSuccessful;
 
 	/// Inconsistent state - stop here to receive error reports from users
-	if (!compilationSuccess && errors.empty())
+	if (((binariesRequested && !compilationSuccess) || !analysisSuccess) && errors.empty())
 		return formatFatalError("InternalCompilerError", "No error reported, but compilation failed.");
 
 	Json::Value output = Json::objectValue;
@@ -681,7 +712,7 @@ Json::Value StandardCompiler::compileInternal(Json::Value const& _input)
 	}
 
 	Json::Value contractsOutput = Json::objectValue;
-	for (string const& contractName: compilationSuccess ? m_compilerStack.contractNames() : vector<string>())
+	for (string const& contractName: analysisSuccess ? m_compilerStack.contractNames() : vector<string>())
 	{
 		size_t colon = contractName.rfind(':');
 		solAssert(colon != string::npos, "");
@@ -692,7 +723,7 @@ Json::Value StandardCompiler::compileInternal(Json::Value const& _input)
 		Json::Value contractData(Json::objectValue);
 		if (isArtifactRequested(outputSelection, file, name, "abi"))
 			contractData["abi"] = m_compilerStack.contractABI(contractName);
-		if (isArtifactRequested(outputSelection, file, name, "metadata"))
+		if (compilationSuccess && isArtifactRequested(outputSelection, file, name, "metadata"))
 			contractData["metadata"] = m_compilerStack.metadata(contractName);
 		if (isArtifactRequested(outputSelection, file, name, "userdoc"))
 			contractData["userdoc"] = m_compilerStack.natspecUser(contractName);
@@ -702,16 +733,16 @@ Json::Value StandardCompiler::compileInternal(Json::Value const& _input)
 		// EVM
 		Json::Value evmData(Json::objectValue);
 		// @TODO: add ir
-		if (isArtifactRequested(outputSelection, file, name, "evm.assembly"))
+		if (compilationSuccess && isArtifactRequested(outputSelection, file, name, "evm.assembly"))
 			evmData["assembly"] = m_compilerStack.assemblyString(contractName, createSourceList(_input));
-		if (isArtifactRequested(outputSelection, file, name, "evm.legacyAssembly"))
+		if (compilationSuccess && isArtifactRequested(outputSelection, file, name, "evm.legacyAssembly"))
 			evmData["legacyAssembly"] = m_compilerStack.assemblyJSON(contractName, createSourceList(_input));
 		if (isArtifactRequested(outputSelection, file, name, "evm.methodIdentifiers"))
 			evmData["methodIdentifiers"] = m_compilerStack.methodIdentifiers(contractName);
-		if (isArtifactRequested(outputSelection, file, name, "evm.gasEstimates"))
+		if (compilationSuccess && isArtifactRequested(outputSelection, file, name, "evm.gasEstimates"))
 			evmData["gasEstimates"] = m_compilerStack.gasEstimates(contractName);
 
-		if (isArtifactRequested(
+		if (compilationSuccess && isArtifactRequested(
 			outputSelection,
 			file,
 			name,
@@ -722,7 +753,7 @@ Json::Value StandardCompiler::compileInternal(Json::Value const& _input)
 				m_compilerStack.sourceMapping(contractName)
 			);
 
-		if (isArtifactRequested(
+		if (compilationSuccess && isArtifactRequested(
 			outputSelection,
 			file,
 			name,
@@ -733,14 +764,18 @@ Json::Value StandardCompiler::compileInternal(Json::Value const& _input)
 				m_compilerStack.runtimeSourceMapping(contractName)
 			);
 
-		contractData["evm"] = evmData;
+		if (!evmData.empty())
+			contractData["evm"] = evmData;
 
-		if (!contractsOutput.isMember(file))
-			contractsOutput[file] = Json::objectValue;
-
-		contractsOutput[file][name] = contractData;
+		if (!contractData.empty())
+		{
+			if (!contractsOutput.isMember(file))
+				contractsOutput[file] = Json::objectValue;
+			contractsOutput[file][name] = contractData;
+		}
 	}
-	output["contracts"] = contractsOutput;
+	if (!contractsOutput.empty())
+		output["contracts"] = contractsOutput;
 
 	return output;
 }