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Handle list of files in alien paths #15580

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Handle list of files in alien paths #15580

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21 changes: 20 additions & 1 deletion Generators/src/GeneratorFromFile.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -528,7 +528,26 @@ std::vector<std::string> GeneratorFromEventPool::setupFileUniverse(std::string c
if (typeString.size() == 0) {
return result;
} else if (typeString.size() == 1 && typeString.front() == std::string("Type: f")) {
// this is a file ... simply use it
// this is a file:
// 1) list of files ==> select one of the lines and use it
// 2) evtpool.root ==> use as it is
if (!checkFileName(path)) {
// Assume it is a text file containing a list of pools
auto tmpPath = (std::filesystem::temp_directory_path() / ("list_" + std::to_string(getpid()) + ".txt")).string();
auto res = TFile::Cp(Form("%s?filetype=raw", path.c_str()), tmpPath.c_str());
if (!res) {
LOG(fatal) << "Failed to copy file from AliEn: " << path;
} else {
auto files = readLines(tmpPath);
if (checkFileUniverse(files)) {
result = files;
} else {
LOG(fatal) << "The list of files in " << path << " is not valid";
}
std::filesystem::remove(tmpPath);
}
return result;
}
result.push_back(mConfig.eventPoolPath);
return result;
} else if (typeString.size() == 1 && typeString.front() == std::string("Type: d")) {
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