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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 "cmIfCommand.h"
#include "cmConditionEvaluator.h"
#include "cmExecutionStatus.h"
#include "cmExpandedCommandArgument.h"
#include "cmMakefile.h"
#include "cmOutputConverter.h"
#include "cmSystemTools.h"
#include "cm_auto_ptr.hxx"
#include "cmake.h"
static std::string cmIfCommandError(
std::vector<cmExpandedCommandArgument> const& args)
{
std::string err = "given arguments:\n ";
for (std::vector<cmExpandedCommandArgument>::const_iterator i = args.begin();
i != args.end(); ++i) {
err += " ";
err += cmOutputConverter::EscapeForCMake(i->GetValue());
}
err += "\n";
return err;
}
//=========================================================================
bool cmIfFunctionBlocker::IsFunctionBlocked(const cmListFileFunction& lff,
cmMakefile& mf,
cmExecutionStatus& inStatus)
{
// we start by recording all the functions
if (!cmSystemTools::Strucmp(lff.Name.c_str(), "if")) {
this->ScopeDepth++;
} else if (!cmSystemTools::Strucmp(lff.Name.c_str(), "endif")) {
this->ScopeDepth--;
// if this is the endif for this if statement, then start executing
if (!this->ScopeDepth) {
// Remove the function blocker for this scope or bail.
CM_AUTO_PTR<cmFunctionBlocker> fb(mf.RemoveFunctionBlocker(this, lff));
if (!fb.get()) {
return false;
}
// execute the functions for the true parts of the if statement
cmExecutionStatus status;
int scopeDepth = 0;
for (unsigned int c = 0; c < this->Functions.size(); ++c) {
// keep track of scope depth
if (!cmSystemTools::Strucmp(this->Functions[c].Name.c_str(), "if")) {
scopeDepth++;
}
if (!cmSystemTools::Strucmp(this->Functions[c].Name.c_str(),
"endif")) {
scopeDepth--;
}
// watch for our state change
if (scopeDepth == 0 &&
!cmSystemTools::Strucmp(this->Functions[c].Name.c_str(), "else")) {
this->IsBlocking = this->HasRun;
this->HasRun = true;
// if trace is enabled, print a (trivially) evaluated "else"
// statement
if (!this->IsBlocking && mf.GetCMakeInstance()->GetTrace()) {
mf.PrintCommandTrace(this->Functions[c]);
}
} else if (scopeDepth == 0 &&
!cmSystemTools::Strucmp(this->Functions[c].Name.c_str(),
"elseif")) {
if (this->HasRun) {
this->IsBlocking = true;
} else {
// if trace is enabled, print the evaluated "elseif" statement
if (mf.GetCMakeInstance()->GetTrace()) {
mf.PrintCommandTrace(this->Functions[c]);
}
std::string errorString;
std::vector<cmExpandedCommandArgument> expandedArguments;
mf.ExpandArguments(this->Functions[c].Arguments,
expandedArguments);
cmake::MessageType messType;
cmListFileContext conditionContext =
cmListFileContext::FromCommandContext(
this->Functions[c], this->GetStartingContext().FilePath);
cmConditionEvaluator conditionEvaluator(
mf, conditionContext, mf.GetBacktrace(this->Functions[c]));
bool isTrue = conditionEvaluator.IsTrue(expandedArguments,
errorString, messType);
if (!errorString.empty()) {
std::string err = cmIfCommandError(expandedArguments);
err += errorString;
cmListFileBacktrace bt = mf.GetBacktrace(this->Functions[c]);
mf.GetCMakeInstance()->IssueMessage(messType, err, bt);
if (messType == cmake::FATAL_ERROR) {
cmSystemTools::SetFatalErrorOccured();
return true;
}
}
if (isTrue) {
this->IsBlocking = false;
this->HasRun = true;
}
}
}
// should we execute?
else if (!this->IsBlocking) {
status.Clear();
mf.ExecuteCommand(this->Functions[c], status);
if (status.GetReturnInvoked()) {
inStatus.SetReturnInvoked(true);
return true;
}
if (status.GetBreakInvoked()) {
inStatus.SetBreakInvoked(true);
return true;
}
if (status.GetContinueInvoked()) {
inStatus.SetContinueInvoked(true);
return true;
}
}
}
return true;
}
}
// record the command
this->Functions.push_back(lff);
// always return true
return true;
}
//=========================================================================
bool cmIfFunctionBlocker::ShouldRemove(const cmListFileFunction& lff,
cmMakefile&)
{
if (!cmSystemTools::Strucmp(lff.Name.c_str(), "endif")) {
// if the endif has arguments, then make sure
// they match the arguments of the matching if
if (lff.Arguments.empty() || lff.Arguments == this->Args) {
return true;
}
}
return false;
}
//=========================================================================
bool cmIfCommand::InvokeInitialPass(
const std::vector<cmListFileArgument>& args, cmExecutionStatus&)
{
std::string errorString;
std::vector<cmExpandedCommandArgument> expandedArguments;
this->Makefile->ExpandArguments(args, expandedArguments);
cmake::MessageType status;
cmConditionEvaluator conditionEvaluator(
*(this->Makefile), this->Makefile->GetExecutionContext(),
this->Makefile->GetBacktrace());
bool isTrue =
conditionEvaluator.IsTrue(expandedArguments, errorString, status);
if (!errorString.empty()) {
std::string err = "if " + cmIfCommandError(expandedArguments);
err += errorString;
if (status == cmake::FATAL_ERROR) {
this->Makefile->IssueMessage(cmake::FATAL_ERROR, err);
cmSystemTools::SetFatalErrorOccured();
return true;
}
this->Makefile->IssueMessage(status, err);
}
cmIfFunctionBlocker* f = new cmIfFunctionBlocker();
// if is isn't true block the commands
f->ScopeDepth = 1;
f->IsBlocking = !isTrue;
if (isTrue) {
f->HasRun = true;
}
f->Args = args;
this->Makefile->AddFunctionBlocker(f);
return true;
}
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