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/***********************************************/
/**
* @file loopCommandOutput.h
*
* @brief Loop over lines of command output.
*
* @author Sebastian Strasser
* @date 2017-02-10
*
*/
/***********************************************/
#ifndef __GROOPS_LOOPCOMMANDOUTPUT__
#define __GROOPS_LOOPCOMMANDOUTPUT__
// Latex documentation
#ifdef DOCSTRING_Loop
static const char *docstringLoopCommandOutput = R"(
\subsection{CommandOutput}\label{loopType:commandOutput}
Loop over lines of command output.
)";
#endif
/***********************************************/
#include "base/import.h"
#include "parallel/parallel.h"
#include "inputOutput/logging.h"
#include "inputOutput/system.h"
#include "classes/loop/loop.h"
/***** CLASS ***********************************/
/** @brief Loop over lines of command output.
* @ingroup loopGroup
* @see Loop */
class LoopCommandOutput : public Loop
{
std::string nameString, nameIndex, nameCount;
std::vector<std::string> strings;
public:
LoopCommandOutput(Config &config);
UInt count() const override {return strings.size();}
Bool iteration(VariableList &varList) override;
};
/***********************************************/
/***** Inlines *********************************/
/***********************************************/
inline LoopCommandOutput::LoopCommandOutput(Config &config)
{
try
{
std::vector<FileName> commands;
Bool silently;
readConfig(config, "command", commands, Config::MUSTSET, "", "each output line becomes a loop iteration");
readConfig(config, "silently", silently, Config::DEFAULT, "0", "without showing the output.");
readConfig(config, "variableLoopString", nameString, Config::OPTIONAL, "loopCommand", "name of the variable to be replaced");
readConfig(config, "variableLoopIndex", nameIndex, Config::OPTIONAL, "", "variable with index of current iteration (starts with zero)");
readConfig(config, "variableLoopCount", nameCount, Config::OPTIONAL, "", "variable with total number of iterations");
readConfigCondition(config);
if(isCreateSchema(config)) return;
for(const auto &command : commands)
{
UInt count = strings.size();
if(!System::exec(command, strings))
throw(Exception("Command \""+command.str()+"\" exited with error"));
if(strings.size() == count)
logWarningOnce<<"Command \""+command.str()+"\" returned no output"<<Log::endl;
} // for(i)
if(!silently)
for(const auto &str : strings)
logInfo<<str<<Log::endl;
}
catch(std::exception &e)
{
GROOPS_RETHROW(e)
}
}
/***********************************************/
inline Bool LoopCommandOutput::iteration(VariableList &varList)
{
if(index() >= count())
return FALSE;
if(!nameString.empty()) varList.setVariable(nameString, strings.at(index()));
if(!nameIndex.empty()) varList.setVariable(nameIndex, index());
if(!nameCount.empty()) varList.setVariable(nameCount, count());
return checkCondition(varList);
}
/***********************************************/
#endif
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