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89 lines
2.7 KiB
89 lines
2.7 KiB
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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#include "cmOptionCommand.h"
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#include <sstream>
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#include "cmAlgorithms.h"
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#include "cmMakefile.h"
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#include "cmPolicies.h"
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#include "cmState.h"
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#include "cmStateSnapshot.h"
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#include "cmStateTypes.h"
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#include "cmSystemTools.h"
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#include "cmake.h"
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class cmExecutionStatus;
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// cmOptionCommand
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bool cmOptionCommand::InitialPass(std::vector<std::string> const& args,
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cmExecutionStatus&)
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{
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const bool argError = (args.size() < 2) || (args.size() > 3);
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if (argError) {
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std::string m = "called with incorrect number of arguments: ";
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m += cmJoin(args, " ");
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this->SetError(m);
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return false;
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}
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// Determine the state of the option policy
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bool checkAndWarn = false;
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{
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auto status = this->Makefile->GetPolicyStatus(cmPolicies::CMP0077);
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const auto* existsBeforeSet =
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this->Makefile->GetStateSnapshot().GetDefinition(args[0]);
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switch (status) {
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case cmPolicies::WARN:
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checkAndWarn = (existsBeforeSet != nullptr);
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break;
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case cmPolicies::OLD:
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// OLD behavior does not warn.
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break;
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case cmPolicies::REQUIRED_ALWAYS:
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case cmPolicies::REQUIRED_IF_USED:
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case cmPolicies::NEW: {
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// See if a local variable with this name already exists.
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// If so we ignore the option command.
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if (existsBeforeSet) {
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return true;
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}
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} break;
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}
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}
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// See if a cache variable with this name already exists
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// If so just make sure the doc state is correct
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cmState* state = this->Makefile->GetState();
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const char* existingValue = state->GetCacheEntryValue(args[0]);
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if (existingValue &&
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(state->GetCacheEntryType(args[0]) != cmStateEnums::UNINITIALIZED)) {
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state->SetCacheEntryProperty(args[0], "HELPSTRING", args[1]);
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return true;
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}
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// Nothing in the cache so add it
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std::string initialValue = existingValue ? existingValue : "Off";
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if (args.size() == 3) {
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initialValue = args[2];
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}
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bool init = cmSystemTools::IsOn(initialValue);
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this->Makefile->AddCacheDefinition(args[0], init ? "ON" : "OFF",
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args[1].c_str(), cmStateEnums::BOOL);
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if (checkAndWarn) {
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const auto* existsAfterSet =
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this->Makefile->GetStateSnapshot().GetDefinition(args[0]);
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if (!existsAfterSet) {
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std::ostringstream w;
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w << cmPolicies::GetPolicyWarning(cmPolicies::CMP0077)
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<< "\n"
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"For compatibility with older versions of CMake, option "
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"is clearing the normal variable '"
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<< args[0] << "'.";
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this->Makefile->IssueMessage(cmake::AUTHOR_WARNING, w.str());
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}
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}
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return true;
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}
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