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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 "cmMacroCommand.h"
#include <cstdio>
#include <utility>
#include <cm/memory>
#include <cm/string_view>
#include <cmext/algorithm>
#include <cmext/string_view>
#include "cmExecutionStatus.h"
#include "cmFunctionBlocker.h"
#include "cmListFileCache.h"
#include "cmMakefile.h"
#include "cmPolicies.h"
#include "cmRange.h"
#include "cmState.h"
#include "cmStringAlgorithms.h"
#include "cmSystemTools.h"
namespace {
// define the class for macro commands
class cmMacroHelperCommand
{
public:
/**
* This is called when the command is first encountered in
* the CMakeLists.txt file.
*/
bool operator()(std::vector<cmListFileArgument> const& args,
cmExecutionStatus& inStatus) const;
std::vector<std::string> Args;
std::vector<cmListFileFunction> Functions;
cmPolicies::PolicyMap Policies;
std::string FilePath;
};
bool cmMacroHelperCommand::operator()(
std::vector<cmListFileArgument> const& args,
cmExecutionStatus& inStatus) const
{
cmMakefile& makefile = inStatus.GetMakefile();
// Expand the argument list to the macro.
std::vector<std::string> expandedArgs;
makefile.ExpandArguments(args, expandedArgs);
// make sure the number of arguments passed is at least the number
// required by the signature
if (expandedArgs.size() < this->Args.size() - 1) {
std::string errorMsg =
cmStrCat("Macro invoked with incorrect arguments for macro named: ",
this->Args[0]);
inStatus.SetError(errorMsg);
return false;
}
cmMakefile::MacroPushPop macroScope(&makefile, this->FilePath,
this->Policies);
// set the value of argc
std::string argcDef = std::to_string(expandedArgs.size());
auto eit = expandedArgs.begin() + (this->Args.size() - 1);
std::string expandedArgn = cmJoin(cmMakeRange(eit, expandedArgs.end()), ";");
std::string expandedArgv = cmJoin(expandedArgs, ";");
std::vector<std::string> variables;
variables.reserve(this->Args.size() - 1);
for (unsigned int j = 1; j < this->Args.size(); ++j) {
variables.push_back("${" + this->Args[j] + "}");
}
std::vector<std::string> argVs;
argVs.reserve(expandedArgs.size());
char argvName[60];
for (unsigned int j = 0; j < expandedArgs.size(); ++j) {
snprintf(argvName, sizeof(argvName), "${ARGV%u}", j);
argVs.emplace_back(argvName);
}
// Invoke all the functions that were collected in the block.
// for each function
for (cmListFileFunction const& func : this->Functions) {
// Replace the formal arguments and then invoke the command.
std::vector<cmListFileArgument> newLFFArgs;
newLFFArgs.reserve(func.Arguments().size());
// for each argument of the current function
for (cmListFileArgument const& k : func.Arguments()) {
cmListFileArgument arg;
arg.Value = k.Value;
if (k.Delim != cmListFileArgument::Bracket) {
// replace formal arguments
for (unsigned int j = 0; j < variables.size(); ++j) {
cmSystemTools::ReplaceString(arg.Value, variables[j],
expandedArgs[j]);
}
// replace argc
cmSystemTools::ReplaceString(arg.Value, "${ARGC}", argcDef);
cmSystemTools::ReplaceString(arg.Value, "${ARGN}", expandedArgn);
cmSystemTools::ReplaceString(arg.Value, "${ARGV}", expandedArgv);
// if the current argument of the current function has ${ARGV in it
// then try replacing ARGV values
if (arg.Value.find("${ARGV") != std::string::npos) {
for (unsigned int t = 0; t < expandedArgs.size(); ++t) {
cmSystemTools::ReplaceString(arg.Value, argVs[t], expandedArgs[t]);
}
}
}
arg.Delim = k.Delim;
arg.Line = k.Line;
newLFFArgs.push_back(std::move(arg));
}
cmListFileFunction newLFF{ func.OriginalName(), func.Line(),
func.LineEnd(), std::move(newLFFArgs) };
cmExecutionStatus status(makefile);
if (!makefile.ExecuteCommand(newLFF, status) || status.GetNestedError()) {
// The error message should have already included the call stack
// so we do not need to report an error here.
macroScope.Quiet();
inStatus.SetNestedError();
return false;
}
if (status.GetReturnInvoked()) {
inStatus.SetReturnInvoked(status.GetReturnVariables());
return true;
}
if (status.GetBreakInvoked()) {
inStatus.SetBreakInvoked();
return true;
}
}
return true;
}
class cmMacroFunctionBlocker : public cmFunctionBlocker
{
public:
cm::string_view StartCommandName() const override { return "macro"_s; }
cm::string_view EndCommandName() const override { return "endmacro"_s; }
bool ArgumentsMatch(cmListFileFunction const&,
cmMakefile& mf) const override;
bool Replay(std::vector<cmListFileFunction> functions,
cmExecutionStatus& status) override;
std::vector<std::string> Args;
};
bool cmMacroFunctionBlocker::ArgumentsMatch(cmListFileFunction const& lff,
cmMakefile& mf) const
{
std::vector<std::string> expandedArguments;
mf.ExpandArguments(lff.Arguments(), expandedArguments);
return expandedArguments.empty() || expandedArguments[0] == this->Args[0];
}
bool cmMacroFunctionBlocker::Replay(std::vector<cmListFileFunction> functions,
cmExecutionStatus& status)
{
cmMakefile& mf = status.GetMakefile();
mf.AppendProperty("MACROS", this->Args[0]);
// create a new command and add it to cmake
cmMacroHelperCommand f;
f.Args = this->Args;
f.Functions = std::move(functions);
f.FilePath = this->GetStartingContext().FilePath;
mf.RecordPolicies(f.Policies);
return mf.GetState()->AddScriptedCommand(
this->Args[0],
BT<cmState::Command>(std::move(f),
mf.GetBacktrace().Push(this->GetStartingContext())),
mf);
}
}
bool cmMacroCommand(std::vector<std::string> const& args,
cmExecutionStatus& status)
{
if (args.empty()) {
status.SetError("called with incorrect number of arguments");
return false;
}
// create a function blocker
{
auto fb = cm::make_unique<cmMacroFunctionBlocker>();
cm::append(fb->Args, args);
status.GetMakefile().AddFunctionBlocker(std::move(fb));
}
return true;
}
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