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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 "cmUnsetCommand.h"
#include "cmSystemTools.h"
// cmUnsetCommand
bool cmUnsetCommand::InitialPass(std::vector<std::string> const& args,
cmExecutionStatus&)
{
if (args.empty() || args.size() > 2) {
this->SetError("called with incorrect number of arguments");
return false;
}
const char* variable = args[0].c_str();
// unset(ENV{VAR})
if (cmHasLiteralPrefix(variable, "ENV{") && strlen(variable) > 5) {
// what is the variable name
char* envVarName = new char[strlen(variable)];
strncpy(envVarName, variable + 4, strlen(variable) - 5);
envVarName[strlen(variable) - 5] = '\0';
#ifdef CMAKE_BUILD_WITH_CMAKE
cmSystemTools::UnsetEnv(envVarName);
#endif
delete[] envVarName;
return true;
}
// unset(VAR)
if (args.size() == 1) {
this->Makefile->RemoveDefinition(variable);
return true;
}
// unset(VAR CACHE)
if ((args.size() == 2) && (args[1] == "CACHE")) {
this->Makefile->RemoveCacheDefinition(variable);
return true;
}
// unset(VAR PARENT_SCOPE)
if ((args.size() == 2) && (args[1] == "PARENT_SCOPE")) {
this->Makefile->RaiseScope(variable, CM_NULLPTR);
return true;
}
// ERROR: second argument isn't CACHE or PARENT_SCOPE
this->SetError("called with an invalid second argument");
return false;
}
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