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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 <sstream>
#include <utility>
#include <cm/optional>
#include <cm/string_view>
#include <cmext/string_view>
#include "cmGeneratorExpressionContext.h"
#include "cmGeneratorExpressionEvaluator.h"
#include "cmGeneratorTarget.h"
#include "cmLocalGenerator.h"
#include "cmMessageType.h"
#include "cmStringAlgorithms.h"
#include "cmake.h"
cmGeneratorExpressionDAGChecker::cmGeneratorExpressionDAGChecker(
cmGeneratorTarget const* target, std::string property,
const GeneratorExpressionContent* content,
cmGeneratorExpressionDAGChecker* parent, cmLocalGenerator const* contextLG,
std::string const& contextConfig)
: cmGeneratorExpressionDAGChecker(cmListFileBacktrace(), target,
std::move(property), content, parent,
contextLG, contextConfig)
{
}
cmGeneratorExpressionDAGChecker::cmGeneratorExpressionDAGChecker(
cmListFileBacktrace backtrace, cmGeneratorTarget const* target,
std::string property, const GeneratorExpressionContent* content,
cmGeneratorExpressionDAGChecker* parent, cmLocalGenerator const* contextLG,
std::string const& contextConfig)
: Parent(parent)
, Top(parent ? parent->Top : this)
, Target(target)
, Property(std::move(property))
, Content(content)
, Backtrace(std::move(backtrace))
{
if (parent) {
this->TopIsTransitiveProperty = parent->TopIsTransitiveProperty;
} else {
this->TopIsTransitiveProperty =
this->Target
->IsTransitiveProperty(this->Property, contextLG, contextConfig,
this->EvaluatingLinkLibraries())
.has_value();
}
this->CheckResult = this->CheckGraph();
if (this->CheckResult == DAG && this->EvaluatingTransitiveProperty()) {
const auto* top = this->Top;
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::GetTransitivePropertiesOnlyCMP0131()
const
{
return this->Top->CMP0131;
}
bool cmGeneratorExpressionDAGChecker::EvaluatingTransitiveProperty() const
{
return this->TopIsTransitiveProperty;
}
bool cmGeneratorExpressionDAGChecker::EvaluatingGenexExpression() const
{
// Corresponds to GenexEvaluator::EvaluateExpression.
return cmHasLiteralPrefix(this->Property, "TARGET_GENEX_EVAL:") ||
cmHasLiteralPrefix(this->Property, "GENEX_EVAL:");
}
bool cmGeneratorExpressionDAGChecker::EvaluatingPICExpression() const
{
// Corresponds to checkInterfacePropertyCompatibility's special case
// that evaluates the value of POSITION_INDEPENDENT_CODE as a genex.
return this->Top->Property == "INTERFACE_POSITION_INDEPENDENT_CODE";
}
bool cmGeneratorExpressionDAGChecker::EvaluatingCompileExpression() const
{
cm::string_view property(this->Top->Property);
return property == "INCLUDE_DIRECTORIES"_s ||
property == "COMPILE_DEFINITIONS"_s || property == "COMPILE_OPTIONS"_s;
}
bool cmGeneratorExpressionDAGChecker::EvaluatingSources() const
{
return this->Property == "SOURCES"_s ||
this->Property == "INTERFACE_SOURCES"_s;
}
bool cmGeneratorExpressionDAGChecker::EvaluatingLinkExpression() const
{
cm::string_view property(this->Top->Property);
return property == "LINK_DIRECTORIES"_s || property == "LINK_OPTIONS"_s ||
property == "LINK_DEPENDS"_s || property == "LINK_LIBRARY_OVERRIDE"_s ||
property == "LINKER_TYPE"_s;
}
bool cmGeneratorExpressionDAGChecker::EvaluatingLinkOptionsExpression() const
{
cm::string_view property(this->Top->Property);
return property == "LINK_OPTIONS"_s || property == "LINKER_TYPE"_s;
}
bool cmGeneratorExpressionDAGChecker::EvaluatingLinkerLauncher() const
{
cm::string_view property(this->Top->Property);
return property.length() > cmStrLen("_LINKER_LAUNCHER") &&
property.substr(property.length() - cmStrLen("_LINKER_LAUNCHER")) ==
"_LINKER_LAUNCHER"_s;
}
bool cmGeneratorExpressionDAGChecker::EvaluatingLinkLibraries(
cmGeneratorTarget const* tgt, ForGenex genex) const
{
const auto* top = this->Top;
cm::string_view prop(top->Property);
if (tgt) {
return top->Target == tgt && prop == "LINK_LIBRARIES"_s;
}
auto result = prop == "LINK_LIBRARIES"_s ||
prop == "INTERFACE_LINK_LIBRARIES"_s ||
prop == "INTERFACE_LINK_LIBRARIES_DIRECT"_s ||
prop == "LINK_INTERFACE_LIBRARIES"_s ||
prop == "IMPORTED_LINK_INTERFACE_LIBRARIES"_s ||
cmHasLiteralPrefix(prop, "LINK_INTERFACE_LIBRARIES_") ||
cmHasLiteralPrefix(prop, "IMPORTED_LINK_INTERFACE_LIBRARIES_");
return genex == ForGenex::LINK_LIBRARY || genex == ForGenex::LINK_GROUP
? result
: (result || prop == "INTERFACE_LINK_LIBRARIES_DIRECT_EXCLUDE"_s);
}
cmGeneratorTarget const* cmGeneratorExpressionDAGChecker::TopTarget() const
{
return this->Top->Target;
}
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