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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 "cmVariableRequiresCommand.h"
#include "cmState.h"
// cmLibraryCommand
bool cmVariableRequiresCommand::InitialPass(
std::vector<std::string> const& args, cmExecutionStatus&)
{
if (this->Disallowed(
cmPolicies::CMP0035,
"The variable_requires command should not be called; see CMP0035.")) {
return true;
}
if (args.size() < 3) {
this->SetError("called with incorrect number of arguments");
return false;
}
std::string testVariable = args[0];
if (!this->Makefile->IsOn(testVariable)) {
return true;
}
std::string resultVariable = args[1];
bool requirementsMet = true;
std::string notSet;
bool hasAdvanced = false;
cmState* state = this->Makefile->GetState();
for (unsigned int i = 2; i < args.size(); ++i) {
if (!this->Makefile->IsOn(args[i])) {
requirementsMet = false;
notSet += args[i];
notSet += "\n";
if (state->GetCacheEntryValue(args[i]) &&
state->GetCacheEntryPropertyAsBool(args[i], "ADVANCED")) {
hasAdvanced = true;
}
}
}
const char* reqVar = this->Makefile->GetDefinition(resultVariable);
// if reqVar is unset, then set it to requirementsMet
// if reqVar is set to true, but requirementsMet is false , then
// set reqVar to false.
if (!reqVar || (!requirementsMet && this->Makefile->IsOn(reqVar))) {
this->Makefile->AddDefinition(resultVariable, requirementsMet);
}
if (!requirementsMet) {
std::string message = "Variable assertion failed:\n";
message +=
testVariable + " Requires that the following unset variables are set:\n";
message += notSet;
message += "\nPlease set them, or set ";
message += testVariable + " to false, and re-configure.\n";
if (hasAdvanced) {
message +=
"One or more of the required variables is advanced."
" To set the variable, you must turn on advanced mode in cmake.";
}
cmSystemTools::Error(message.c_str());
}
return true;
}
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