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#include "command.hh"
#include "store-api.hh"
#include "local-fs-store.hh"
#include "derivations.hh"
#include "nixexpr.hh"
#include "profiles.hh"
#include <nlohmann/json.hpp>
extern char * * environ __attribute__((weak));
namespace nix {
RegisterCommand::Commands * RegisterCommand::commands = nullptr;
nix::Commands RegisterCommand::getCommandsFor(const std::vector<std::string> & prefix)
{
nix::Commands res;
for (auto & [name, command] : *RegisterCommand::commands)
if (name.size() == prefix.size() + 1) {
bool equal = true;
for (size_t i = 0; i < prefix.size(); ++i)
if (name[i] != prefix[i]) equal = false;
if (equal)
res.insert_or_assign(name[prefix.size()], command);
}
return res;
}
nlohmann::json NixMultiCommand::toJSON()
{
// FIXME: use Command::toJSON() as well.
return MultiCommand::toJSON();
}
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)
addFlag({
.longName = "no-recursive",
.description = "Apply operation to specified paths only.",
.category = installablesCategory,
.handler = {&this->recursive, false},
});
else
addFlag({
.longName = "recursive",
.shortName = 'r',
.description = "Apply operation to closure of the specified paths.",
.category = installablesCategory,
.handler = {&this->recursive, true},
});
addFlag({
.longName = "all",
.description = "Apply the operation to every store path.",
.category = installablesCategory,
.handler = {&all, true},
});
}
void StorePathsCommand::run(ref<Store> store)
{
StorePaths 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, realiseMode, operateOn, installables))
storePaths.push_back(p);
if (recursive) {
StorePathSet closure;
store->computeFSClosure(StorePathSet(storePaths.begin(), storePaths.end()), closure, false, false);
storePaths.clear();
for (auto & p : closure)
storePaths.push_back(p);
}
}
run(store, std::move(storePaths));
}
void StorePathCommand::run(ref<Store> store)
{
auto storePaths = toStorePaths(store, Realise::Nothing, operateOn, installables);
if (storePaths.size() != 1)
throw UsageError("this command requires exactly one store path");
run(store, *storePaths.begin());
}
Strings editorFor(const Pos & pos)
{
auto editor = getEnv("EDITOR").value_or("cat");
auto args = tokenizeString<Strings>(editor);
if (pos.line > 0 && (
editor.find("emacs") != std::string::npos ||
editor.find("nano") != std::string::npos ||
editor.find("vim") != std::string::npos))
args.push_back(fmt("+%d", pos.line));
args.push_back(pos.file);
return args;
}
MixProfile::MixProfile()
{
addFlag({
.longName = "profile",
.description = "The profile to update.",
.labels = {"path"},
.handler = {&profile},
.completer = completePath
});
}
void MixProfile::updateProfile(const StorePath & storePath)
{
if (!profile) return;
auto store = getStore().dynamic_pointer_cast<LocalFSStore>();
if (!store) throw Error("'--profile' is not supported for this Nix store");
auto profile2 = absPath(*profile);
switchLink(profile2,
createGeneration(
ref<LocalFSStore>(store),
profile2, storePath));
}
void MixProfile::updateProfile(const Buildables & buildables)
{
if (!profile) return;
std::vector<StorePath> result;
for (auto & buildable : buildables) {
std::visit(overloaded {
[&](BuildableOpaque bo) {
result.push_back(bo.path);
},
[&](BuildableFromDrv bfd) {
for (auto & output : bfd.outputs) {
/* Output path should be known because we just tried to
build it. */
assert(output.second);
result.push_back(*output.second);
}
},
}, buildable);
}
if (result.size() != 1)
throw Error("'--profile' requires that the arguments produce a single store path, but there are %d", result.size());
updateProfile(result[0]);
}
MixDefaultProfile::MixDefaultProfile()
{
profile = getDefaultProfile();
}
MixEnvironment::MixEnvironment() : ignoreEnvironment(false)
{
addFlag({
.longName = "ignore-environment",
.shortName = 'i',
.description = "Clear the entire environment (except those specified with `--keep`).",
.handler = {&ignoreEnvironment, true},
});
addFlag({
.longName = "keep",
.shortName = 'k',
.description = "Keep the environment variable *name*.",
.labels = {"name"},
.handler = {[&](std::string s) { keep.insert(s); }},
});
addFlag({
.longName = "unset",
.shortName = 'u',
.description = "Unset the environment variable *name*.",
.labels = {"name"},
.handler = {[&](std::string s) { unset.insert(s); }},
});
}
void MixEnvironment::setEnviron() {
if (ignoreEnvironment) {
if (!unset.empty())
throw UsageError("--unset does not make sense with --ignore-environment");
for (const auto & var : keep) {
auto val = getenv(var.c_str());
if (val) stringsEnv.emplace_back(fmt("%s=%s", var.c_str(), val));
}
vectorEnv = stringsToCharPtrs(stringsEnv);
environ = vectorEnv.data();
} else {
if (!keep.empty())
throw UsageError("--keep does not make sense without --ignore-environment");
for (const auto & var : unset)
unsetenv(var.c_str());
}
}
}
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