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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 "cmExecutionStatus.h"
#include "cmMakefile.h"
#include "cmStringAlgorithms.h"
#include "cmSystemTools.h"
// cmUnsetCommand
bool cmUnsetCommand(std::vector<std::string> const& args,
cmExecutionStatus& status)
{
if (args.empty() || args.size() > 2) {
status.SetError("called with incorrect number of arguments");
return false;
}
auto const& variable = args[0];
// unset(ENV{VAR})
if (cmHasLiteralPrefix(variable, "ENV{") && variable.size() > 5) {
// what is the variable name
auto const& envVarName = variable.substr(4, variable.size() - 5);
#ifndef CMAKE_BOOTSTRAP
cmSystemTools::UnsetEnv(envVarName.c_str());
#endif
return true;
}
// unset(VAR)
if (args.size() == 1) {
status.GetMakefile().RemoveDefinition(variable);
return true;
}
// unset(VAR CACHE)
if ((args.size() == 2) && (args[1] == "CACHE")) {
status.GetMakefile().RemoveCacheDefinition(variable);
return true;
}
// unset(VAR PARENT_SCOPE)
if ((args.size() == 2) && (args[1] == "PARENT_SCOPE")) {
status.GetMakefile().RaiseScope(variable, nullptr);
return true;
}
// ERROR: second argument isn't CACHE or PARENT_SCOPE
status.SetError("called with an invalid second argument");
return false;
}
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