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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 "cmWhileCommand.h"
#include "cm_memory.hxx"
#include "cmConditionEvaluator.h"
#include "cmExecutionStatus.h"
#include "cmExpandedCommandArgument.h"
#include "cmMakefile.h"
#include "cmMessageType.h"
#include "cmSystemTools.h"
#include <utility>
cmWhileFunctionBlocker::cmWhileFunctionBlocker(cmMakefile* mf)
: Makefile(mf)
, Depth(0)
{
this->Makefile->PushLoopBlock();
}
cmWhileFunctionBlocker::~cmWhileFunctionBlocker()
{
this->Makefile->PopLoopBlock();
}
bool cmWhileFunctionBlocker::IsFunctionBlocked(const cmListFileFunction& lff,
cmMakefile& mf,
cmExecutionStatus& inStatus)
{
// at end of for each execute recorded commands
if (lff.Name.Lower == "while") {
// record the number of while commands past this one
this->Depth++;
} else if (lff.Name.Lower == "endwhile") {
// if this is the endwhile for this while loop then execute
if (!this->Depth) {
// Remove the function blocker for this scope or bail.
std::unique_ptr<cmFunctionBlocker> fb(
mf.RemoveFunctionBlocker(this, lff));
if (!fb) {
return false;
}
std::string errorString;
std::vector<cmExpandedCommandArgument> expandedArguments;
mf.ExpandArguments(this->Args, expandedArguments);
MessageType messageType;
cmListFileContext execContext = this->GetStartingContext();
cmCommandContext commandContext;
commandContext.Line = execContext.Line;
commandContext.Name = execContext.Name;
cmConditionEvaluator conditionEvaluator(mf, this->GetStartingContext(),
mf.GetBacktrace(commandContext));
bool isTrue =
conditionEvaluator.IsTrue(expandedArguments, errorString, messageType);
while (isTrue) {
if (!errorString.empty()) {
std::string err = "had incorrect arguments: ";
for (cmListFileArgument const& arg : this->Args) {
err += (arg.Delim ? "\"" : "");
err += arg.Value;
err += (arg.Delim ? "\"" : "");
err += " ";
}
err += "(";
err += errorString;
err += ").";
mf.IssueMessage(messageType, err);
if (messageType == MessageType::FATAL_ERROR) {
cmSystemTools::SetFatalErrorOccured();
return true;
}
}
// Invoke all the functions that were collected in the block.
for (cmListFileFunction const& fn : this->Functions) {
cmExecutionStatus status;
mf.ExecuteCommand(fn, status);
if (status.GetReturnInvoked()) {
inStatus.SetReturnInvoked();
return true;
}
if (status.GetBreakInvoked()) {
return true;
}
if (status.GetContinueInvoked()) {
break;
}
if (cmSystemTools::GetFatalErrorOccured()) {
return true;
}
}
expandedArguments.clear();
mf.ExpandArguments(this->Args, expandedArguments);
isTrue = conditionEvaluator.IsTrue(expandedArguments, errorString,
messageType);
}
return true;
}
// decrement for each nested while that ends
this->Depth--;
}
// record the command
this->Functions.push_back(lff);
// always return true
return true;
}
bool cmWhileFunctionBlocker::ShouldRemove(const cmListFileFunction& lff,
cmMakefile&)
{
if (lff.Name.Lower == "endwhile") {
// if the endwhile has arguments, then make sure
// they match the arguments of the matching while
if (lff.Arguments.empty() || lff.Arguments == this->Args) {
return true;
}
}
return false;
}
bool cmWhileCommand::InvokeInitialPass(
const std::vector<cmListFileArgument>& args, cmExecutionStatus&)
{
if (args.empty()) {
this->SetError("called with incorrect number of arguments");
return false;
}
// create a function blocker
{
auto fb = cm::make_unique<cmWhileFunctionBlocker>(this->Makefile);
fb->Args = args;
this->Makefile->AddFunctionBlocker(std::move(fb));
}
return true;
}
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