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#include "command.hh"
#include "derivations.hh"
#include "store-api.hh"
namespace nix {
Commands* RegisterCommand::commands = 0;
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 Commands& _commands) : commands(_commands) {
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);
#if 0
out << "\n";
out << "For full documentation, run 'man " << programName << "' or 'man " << programName << "-<COMMAND>'.\n";
#endif
}
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);
}
StoreCommand::StoreCommand() {}
ref<Store> StoreCommand::getStore() {
if (!_store) _store = createStore();
return ref<Store>(_store);
}
ref<Store> StoreCommand::createStore() { return openStore(); }
void StoreCommand::run() { run(getStore()); }
StorePathsCommand::StorePathsCommand(bool recursive) : recursive(recursive) {
if (recursive)
mkFlag()
.longName("no-recursive")
.description("apply operation to specified paths only")
.set(&this->recursive, false);
else
mkFlag()
.longName("recursive")
.shortName('r')
.description("apply operation to closure of the specified paths")
.set(&this->recursive, true);
mkFlag(0, "all", "apply operation to the entire store", &all);
}
void StorePathsCommand::run(ref<Store> store) {
Paths storePaths;
if (all) {
if (installables.size())
throw UsageError("'--all' does not expect arguments");
for (auto& p : store->queryAllValidPaths()) storePaths.push_back(p);
}
else {
for (auto& p : toStorePaths(store, NoBuild, installables))
storePaths.push_back(p);
if (recursive) {
PathSet closure;
store->computeFSClosure(PathSet(storePaths.begin(), storePaths.end()),
closure, false, false);
storePaths = Paths(closure.begin(), closure.end());
}
}
run(store, storePaths);
}
void StorePathCommand::run(ref<Store> store) {
auto storePaths = toStorePaths(store, NoBuild, installables);
if (storePaths.size() != 1)
throw UsageError("this command requires exactly one store path");
run(store, *storePaths.begin());
}
} // namespace nix
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