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Move Command and MultiCommand to libutil

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(cherry picked from commit f70434b1fb)
This commit is contained in:
Eelco Dolstra 2018-11-22 16:03:31 +01:00
parent f1b5c76c1a
commit f964f428fe
5 changed files with 116 additions and 117 deletions
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69
src/libutil/args.cc
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@ -200,4 +200,73 @@ void printTable(std::ostream & out, const Table2 & table)
}
}
void Command::printHelp(const string & programName, std::ostream & out)
{
Args::printHelp(programName, out);
auto exs = examples();
if (!exs.empty()) {
out << "\n";
out << "Examples:\n";
for (auto & ex : exs)
out << "\n"
<< " " << ex.description << "\n" // FIXME: wrap
<< " $ " << ex.command << "\n";
}
}
MultiCommand::MultiCommand(const std::vector<ref<Command>> & _commands)
{
for (auto & command : _commands)
commands.emplace(command->name(), command);
expectedArgs.push_back(ExpectedArg{"command", 1, true, [=](std::vector<std::string> ss) {
assert(!command);
auto i = commands.find(ss[0]);
if (i == commands.end())
throw UsageError("'%s' is not a recognised command", ss[0]);
command = i->second;
}});
}
void MultiCommand::printHelp(const string & programName, std::ostream & out)
{
if (command) {
command->printHelp(programName + " " + command->name(), out);
return;
}
out << "Usage: " << programName << " <COMMAND> <FLAGS>... <ARGS>...\n";
out << "\n";
out << "Common flags:\n";
printFlags(out);
out << "\n";
out << "Available commands:\n";
Table2 table;
for (auto & command : commands) {
auto descr = command.second->description();
if (!descr.empty())
table.push_back(std::make_pair(command.second->name(), descr));
}
printTable(out, table);
}
bool MultiCommand::processFlag(Strings::iterator & pos, Strings::iterator end)
{
if (Args::processFlag(pos, end)) return true;
if (command && command->processFlag(pos, end)) return true;
return false;
}
bool MultiCommand::processArgs(const Strings & args, bool finish)
{
if (command)
return command->processArgs(args, finish);
else
return Args::processArgs(args, finish);
}
}