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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file LICENSE.rst or https://cmake.org/licensing for details. */
#include "cmIncludeGuardCommand.h"
#include "cmCryptoHash.h"
#include "cmExecutionStatus.h"
#include "cmMakefile.h"
#include "cmStateDirectory.h"
#include "cmStateSnapshot.h"
#include "cmStringAlgorithms.h"
#include "cmValue.h"
#include "cmake.h"
namespace {
enum IncludeGuardScope
{
VARIABLE,
DIRECTORY,
GLOBAL
};
std::string GetIncludeGuardVariableName(std::string const& filePath)
{
cmCryptoHash hasher(cmCryptoHash::AlgoMD5);
return cmStrCat("__INCGUARD_", hasher.HashString(filePath), "__");
}
bool CheckIncludeGuardIsSet(cmMakefile* mf, std::string const& includeGuardVar)
{
if (mf->GetProperty(includeGuardVar)) {
return true;
}
cmStateSnapshot dirSnapshot =
mf->GetStateSnapshot().GetBuildsystemDirectoryParent();
while (dirSnapshot.GetState()) {
cmStateDirectory stateDir = dirSnapshot.GetDirectory();
if (stateDir.GetProperty(includeGuardVar)) {
return true;
}
dirSnapshot = dirSnapshot.GetBuildsystemDirectoryParent();
}
return false;
}
} // anonymous namespace
// cmIncludeGuardCommand
bool cmIncludeGuardCommand(std::vector<std::string> const& args,
cmExecutionStatus& status)
{
if (args.size() > 1) {
status.SetError(
"given an invalid number of arguments. The command takes at "
"most 1 argument.");
return false;
}
IncludeGuardScope scope = VARIABLE;
if (!args.empty()) {
std::string const& arg = args[0];
if (arg == "DIRECTORY") {
scope = DIRECTORY;
} else if (arg == "GLOBAL") {
scope = GLOBAL;
} else {
status.SetError("given an invalid scope: " + arg);
return false;
}
}
std::string includeGuardVar = GetIncludeGuardVariableName(
*status.GetMakefile().GetDefinition("CMAKE_CURRENT_LIST_FILE"));
cmMakefile* const mf = &status.GetMakefile();
switch (scope) {
case VARIABLE:
if (mf->IsDefinitionSet(includeGuardVar)) {
status.SetReturnInvoked();
return true;
}
mf->AddDefinitionBool(includeGuardVar, true);
break;
case DIRECTORY:
if (CheckIncludeGuardIsSet(mf, includeGuardVar)) {
status.SetReturnInvoked();
return true;
}
mf->SetProperty(includeGuardVar, "TRUE");
break;
case GLOBAL:
cmake* const cm = mf->GetCMakeInstance();
if (cm->GetProperty(includeGuardVar)) {
status.SetReturnInvoked();
return true;
}
cm->SetProperty(includeGuardVar, "TRUE");
break;
}
return true;
}
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