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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#include "cmGeneratorExpressionDAGChecker.h"
#include <cstring>
#include <sstream>
#include <utility>
#include <cm/string_view>
#include "cm_static_string_view.hxx"
#include "cmGeneratorExpressionContext.h"
#include "cmGeneratorExpressionEvaluator.h"
#include "cmGeneratorTarget.h"
#include "cmLocalGenerator.h"
#include "cmMessageType.h"
#include "cmStringAlgorithms.h"
#include "cmake.h"
cmGeneratorExpressionDAGChecker::cmGeneratorExpressionDAGChecker(
cmListFileBacktrace backtrace, cmGeneratorTarget const* target,
std::string property, const GeneratorExpressionContent* content,
cmGeneratorExpressionDAGChecker* parent)
: Parent(parent)
, Target(target)
, Property(std::move(property))
, Content(content)
, Backtrace(std::move(backtrace))
, TransitivePropertiesOnly(false)
{
Initialize();
}
cmGeneratorExpressionDAGChecker::cmGeneratorExpressionDAGChecker(
cmGeneratorTarget const* target, std::string property,
const GeneratorExpressionContent* content,
cmGeneratorExpressionDAGChecker* parent)
: Parent(parent)
, Target(target)
, Property(std::move(property))
, Content(content)
, Backtrace()
, TransitivePropertiesOnly(false)
{
Initialize();
}
void cmGeneratorExpressionDAGChecker::Initialize()
{
const auto* top = this->Top();
this->CheckResult = this->CheckGraph();
#define TEST_TRANSITIVE_PROPERTY_METHOD(METHOD) top->METHOD() ||
if (CheckResult == DAG &&
(CM_FOR_EACH_TRANSITIVE_PROPERTY_METHOD(
TEST_TRANSITIVE_PROPERTY_METHOD) false)) // NOLINT(*)
#undef TEST_TRANSITIVE_PROPERTY_METHOD
{
auto it = top->Seen.find(this->Target);
if (it != top->Seen.end()) {
const std::set<std::string>& propSet = it->second;
if (propSet.find(this->Property) != propSet.end()) {
this->CheckResult = ALREADY_SEEN;
return;
}
}
top->Seen[this->Target].insert(this->Property);
}
}
cmGeneratorExpressionDAGChecker::Result
cmGeneratorExpressionDAGChecker::Check() const
{
return this->CheckResult;
}
void cmGeneratorExpressionDAGChecker::ReportError(
cmGeneratorExpressionContext* context, const std::string& expr)
{
if (this->CheckResult == DAG) {
return;
}
context->HadError = true;
if (context->Quiet) {
return;
}
const cmGeneratorExpressionDAGChecker* parent = this->Parent;
if (parent && !parent->Parent) {
std::ostringstream e;
e << "Error evaluating generator expression:\n"
<< " " << expr << "\n"
<< "Self reference on target \"" << context->HeadTarget->GetName()
<< "\".\n";
context->LG->GetCMakeInstance()->IssueMessage(MessageType::FATAL_ERROR,
e.str(), parent->Backtrace);
return;
}
{
std::ostringstream e;
/* clang-format off */
e << "Error evaluating generator expression:\n"
<< " " << expr << "\n"
<< "Dependency loop found.";
/* clang-format on */
context->LG->GetCMakeInstance()->IssueMessage(MessageType::FATAL_ERROR,
e.str(), context->Backtrace);
}
int loopStep = 1;
while (parent) {
std::ostringstream e;
e << "Loop step " << loopStep << "\n"
<< " "
<< (parent->Content ? parent->Content->GetOriginalExpression() : expr)
<< "\n";
context->LG->GetCMakeInstance()->IssueMessage(MessageType::FATAL_ERROR,
e.str(), parent->Backtrace);
parent = parent->Parent;
++loopStep;
}
}
cmGeneratorExpressionDAGChecker::Result
cmGeneratorExpressionDAGChecker::CheckGraph() const
{
const cmGeneratorExpressionDAGChecker* parent = this->Parent;
while (parent) {
if (this->Target == parent->Target && this->Property == parent->Property) {
return (parent == this->Parent) ? SELF_REFERENCE : CYCLIC_REFERENCE;
}
parent = parent->Parent;
}
return DAG;
}
bool cmGeneratorExpressionDAGChecker::GetTransitivePropertiesOnly() const
{
return this->Top()->TransitivePropertiesOnly;
}
bool cmGeneratorExpressionDAGChecker::EvaluatingGenexExpression() const
{
return cmHasLiteralPrefix(this->Property, "TARGET_GENEX_EVAL:") ||
cmHasLiteralPrefix(this->Property, "GENEX_EVAL:");
}
bool cmGeneratorExpressionDAGChecker::EvaluatingPICExpression() const
{
return this->Top()->Property == "INTERFACE_POSITION_INDEPENDENT_CODE";
}
bool cmGeneratorExpressionDAGChecker::EvaluatingLinkExpression() const
{
cm::string_view property(this->Top()->Property);
return property == "LINK_DIRECTORIES"_s || property == "LINK_OPTIONS"_s ||
property == "LINK_DEPENDS"_s;
}
bool cmGeneratorExpressionDAGChecker::EvaluatingLinkLibraries(
cmGeneratorTarget const* tgt) const
{
const auto* top = this->Top();
cm::string_view prop(top->Property);
if (tgt) {
return top->Target == tgt && prop == "LINK_LIBRARIES"_s;
}
return prop == "LINK_LIBRARIES"_s || prop == "LINK_INTERFACE_LIBRARIES"_s ||
prop == "IMPORTED_LINK_INTERFACE_LIBRARIES"_s ||
cmHasLiteralPrefix(prop, "LINK_INTERFACE_LIBRARIES_") ||
cmHasLiteralPrefix(prop, "IMPORTED_LINK_INTERFACE_LIBRARIES_") ||
prop == "INTERFACE_LINK_LIBRARIES"_s;
}
cmGeneratorExpressionDAGChecker const* cmGeneratorExpressionDAGChecker::Top()
const
{
const cmGeneratorExpressionDAGChecker* top = this;
const cmGeneratorExpressionDAGChecker* parent = this->Parent;
while (parent) {
top = parent;
parent = parent->Parent;
}
return top;
}
cmGeneratorTarget const* cmGeneratorExpressionDAGChecker::TopTarget() const
{
return this->Top()->Target;
}
enum TransitiveProperty
{
#define DEFINE_ENUM_ENTRY(NAME) NAME,
CM_FOR_EACH_TRANSITIVE_PROPERTY_NAME(DEFINE_ENUM_ENTRY)
#undef DEFINE_ENUM_ENTRY
TransitivePropertyTerminal
};
template <TransitiveProperty>
bool additionalTest(const char* const /*unused*/)
{
return false;
}
template <>
bool additionalTest<COMPILE_DEFINITIONS>(const char* const prop)
{
return cmHasLiteralPrefix(prop, "COMPILE_DEFINITIONS_");
}
#define DEFINE_TRANSITIVE_PROPERTY_METHOD(METHOD, PROPERTY) \
bool cmGeneratorExpressionDAGChecker::METHOD() const \
{ \
const char* const prop = this->Property.c_str(); \
if (strcmp(prop, #PROPERTY) == 0 || \
strcmp(prop, "INTERFACE_" #PROPERTY) == 0) { \
return true; \
} \
return additionalTest<PROPERTY>(prop); \
}
CM_FOR_EACH_TRANSITIVE_PROPERTY(DEFINE_TRANSITIVE_PROPERTY_METHOD)
#undef DEFINE_TRANSITIVE_PROPERTY_METHOD
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