lix/src/libcmd/installables.cc
Alain Zscheile 1385b20078
Get rid of most .at calls (#6393)
Use one of `get` or `getOr` instead which will either return a null-pointer (with a nicer error message) or a default value when the key is missing.
2022-05-04 07:44:32 +02:00

1059 lines
33 KiB
C++

#include "globals.hh"
#include "installables.hh"
#include "util.hh"
#include "command.hh"
#include "attr-path.hh"
#include "common-eval-args.hh"
#include "derivations.hh"
#include "eval-inline.hh"
#include "eval.hh"
#include "get-drvs.hh"
#include "store-api.hh"
#include "shared.hh"
#include "flake/flake.hh"
#include "eval-cache.hh"
#include "url.hh"
#include "registry.hh"
#include "build-result.hh"
#include <regex>
#include <queue>
#include <nlohmann/json.hpp>
namespace nix {
void completeFlakeInputPath(
ref<EvalState> evalState,
const FlakeRef & flakeRef,
std::string_view prefix)
{
auto flake = flake::getFlake(*evalState, flakeRef, true);
for (auto & input : flake.inputs)
if (hasPrefix(input.first, prefix))
completions->add(input.first);
}
MixFlakeOptions::MixFlakeOptions()
{
auto category = "Common flake-related options";
addFlag({
.longName = "recreate-lock-file",
.description = "Recreate the flake's lock file from scratch.",
.category = category,
.handler = {&lockFlags.recreateLockFile, true}
});
addFlag({
.longName = "no-update-lock-file",
.description = "Do not allow any updates to the flake's lock file.",
.category = category,
.handler = {&lockFlags.updateLockFile, false}
});
addFlag({
.longName = "no-write-lock-file",
.description = "Do not write the flake's newly generated lock file.",
.category = category,
.handler = {&lockFlags.writeLockFile, false}
});
addFlag({
.longName = "no-registries",
.description =
"Don't allow lookups in the flake registries. This option is deprecated; use `--no-use-registries`.",
.category = category,
.handler = {[&]() {
lockFlags.useRegistries = false;
warn("'--no-registries' is deprecated; use '--no-use-registries'");
}}
});
addFlag({
.longName = "commit-lock-file",
.description = "Commit changes to the flake's lock file.",
.category = category,
.handler = {&lockFlags.commitLockFile, true}
});
addFlag({
.longName = "update-input",
.description = "Update a specific flake input (ignoring its previous entry in the lock file).",
.category = category,
.labels = {"input-path"},
.handler = {[&](std::string s) {
lockFlags.inputUpdates.insert(flake::parseInputPath(s));
}},
.completer = {[&](size_t, std::string_view prefix) {
if (auto flakeRef = getFlakeRefForCompletion())
completeFlakeInputPath(getEvalState(), *flakeRef, prefix);
}}
});
addFlag({
.longName = "override-input",
.description = "Override a specific flake input (e.g. `dwarffs/nixpkgs`). This implies `--no-write-lock-file`.",
.category = category,
.labels = {"input-path", "flake-url"},
.handler = {[&](std::string inputPath, std::string flakeRef) {
lockFlags.writeLockFile = false;
lockFlags.inputOverrides.insert_or_assign(
flake::parseInputPath(inputPath),
parseFlakeRef(flakeRef, absPath("."), true));
}},
.completer = {[&](size_t n, std::string_view prefix) {
if (n == 0) {
if (auto flakeRef = getFlakeRefForCompletion())
completeFlakeInputPath(getEvalState(), *flakeRef, prefix);
} else if (n == 1) {
completeFlakeRef(getEvalState()->store, prefix);
}
}}
});
addFlag({
.longName = "inputs-from",
.description = "Use the inputs of the specified flake as registry entries.",
.category = category,
.labels = {"flake-url"},
.handler = {[&](std::string flakeRef) {
auto evalState = getEvalState();
auto flake = flake::lockFlake(
*evalState,
parseFlakeRef(flakeRef, absPath(".")),
{ .writeLockFile = false });
for (auto & [inputName, input] : flake.lockFile.root->inputs) {
auto input2 = flake.lockFile.findInput({inputName}); // resolve 'follows' nodes
if (auto input3 = std::dynamic_pointer_cast<const flake::LockedNode>(input2)) {
overrideRegistry(
fetchers::Input::fromAttrs({{"type","indirect"}, {"id", inputName}}),
input3->lockedRef.input,
{});
}
}
}},
.completer = {[&](size_t, std::string_view prefix) {
completeFlakeRef(getEvalState()->store, prefix);
}}
});
}
SourceExprCommand::SourceExprCommand(bool supportReadOnlyMode)
{
addFlag({
.longName = "file",
.shortName = 'f',
.description =
"Interpret installables as attribute paths relative to the Nix expression stored in *file*. "
"If *file* is the character -, then a Nix expression will be read from standard input.",
.category = installablesCategory,
.labels = {"file"},
.handler = {&file},
.completer = completePath
});
addFlag({
.longName = "expr",
.description = "Interpret installables as attribute paths relative to the Nix expression *expr*.",
.category = installablesCategory,
.labels = {"expr"},
.handler = {&expr}
});
addFlag({
.longName = "derivation",
.description = "Operate on the store derivation rather than its outputs.",
.category = installablesCategory,
.handler = {&operateOn, OperateOn::Derivation},
});
if (supportReadOnlyMode) {
addFlag({
.longName = "read-only",
.description =
"Do not instantiate each evaluated derivation. "
"This improves performance, but can cause errors when accessing "
"store paths of derivations during evaluation.",
.handler = {&readOnlyMode, true},
});
}
}
Strings SourceExprCommand::getDefaultFlakeAttrPaths()
{
return {
"packages." + settings.thisSystem.get() + ".default",
"defaultPackage." + settings.thisSystem.get()
};
}
Strings SourceExprCommand::getDefaultFlakeAttrPathPrefixes()
{
return {
// As a convenience, look for the attribute in
// 'outputs.packages'.
"packages." + settings.thisSystem.get() + ".",
// As a temporary hack until Nixpkgs is properly converted
// to provide a clean 'packages' set, look in 'legacyPackages'.
"legacyPackages." + settings.thisSystem.get() + "."
};
}
void SourceExprCommand::completeInstallable(std::string_view prefix)
{
if (file) {
completionType = ctAttrs;
evalSettings.pureEval = false;
auto state = getEvalState();
Expr *e = state->parseExprFromFile(
resolveExprPath(state->checkSourcePath(lookupFileArg(*state, *file)))
);
Value root;
state->eval(e, root);
auto autoArgs = getAutoArgs(*state);
std::string prefix_ = std::string(prefix);
auto sep = prefix_.rfind('.');
std::string searchWord;
if (sep != std::string::npos) {
searchWord = prefix_.substr(sep + 1, std::string::npos);
prefix_ = prefix_.substr(0, sep);
} else {
searchWord = prefix_;
prefix_ = "";
}
auto [v, pos] = findAlongAttrPath(*state, prefix_, *autoArgs, root);
Value &v1(*v);
state->forceValue(v1, pos);
Value v2;
state->autoCallFunction(*autoArgs, v1, v2);
if (v2.type() == nAttrs) {
for (auto & i : *v2.attrs) {
std::string name = state->symbols[i.name];
if (name.find(searchWord) == 0) {
if (prefix_ == "")
completions->add(name);
else
completions->add(prefix_ + "." + name);
}
}
}
} else {
completeFlakeRefWithFragment(
getEvalState(),
lockFlags,
getDefaultFlakeAttrPathPrefixes(),
getDefaultFlakeAttrPaths(),
prefix);
}
}
void completeFlakeRefWithFragment(
ref<EvalState> evalState,
flake::LockFlags lockFlags,
Strings attrPathPrefixes,
const Strings & defaultFlakeAttrPaths,
std::string_view prefix)
{
/* Look for flake output attributes that match the
prefix. */
try {
auto hash = prefix.find('#');
if (hash == std::string::npos) {
completeFlakeRef(evalState->store, prefix);
} else {
completionType = ctAttrs;
auto fragment = prefix.substr(hash + 1);
auto flakeRefS = std::string(prefix.substr(0, hash));
auto flakeRef = parseFlakeRef(expandTilde(flakeRefS), absPath("."));
auto evalCache = openEvalCache(*evalState,
std::make_shared<flake::LockedFlake>(lockFlake(*evalState, flakeRef, lockFlags)));
auto root = evalCache->getRoot();
/* Complete 'fragment' relative to all the
attrpath prefixes as well as the root of the
flake. */
attrPathPrefixes.push_back("");
for (auto & attrPathPrefixS : attrPathPrefixes) {
auto attrPathPrefix = parseAttrPath(*evalState, attrPathPrefixS);
auto attrPathS = attrPathPrefixS + std::string(fragment);
auto attrPath = parseAttrPath(*evalState, attrPathS);
std::string lastAttr;
if (!attrPath.empty() && !hasSuffix(attrPathS, ".")) {
lastAttr = evalState->symbols[attrPath.back()];
attrPath.pop_back();
}
auto attr = root->findAlongAttrPath(attrPath);
if (!attr) continue;
for (auto & attr2 : (*attr)->getAttrs()) {
if (hasPrefix(evalState->symbols[attr2], lastAttr)) {
auto attrPath2 = (*attr)->getAttrPath(attr2);
/* Strip the attrpath prefix. */
attrPath2.erase(attrPath2.begin(), attrPath2.begin() + attrPathPrefix.size());
completions->add(flakeRefS + "#" + concatStringsSep(".", evalState->symbols.resolve(attrPath2)));
}
}
}
/* And add an empty completion for the default
attrpaths. */
if (fragment.empty()) {
for (auto & attrPath : defaultFlakeAttrPaths) {
auto attr = root->findAlongAttrPath(parseAttrPath(*evalState, attrPath));
if (!attr) continue;
completions->add(flakeRefS + "#");
}
}
}
} catch (Error & e) {
warn(e.msg());
}
}
void completeFlakeRef(ref<Store> store, std::string_view prefix)
{
if (!settings.isExperimentalFeatureEnabled(Xp::Flakes))
return;
if (prefix == "")
completions->add(".");
completeDir(0, prefix);
/* Look for registry entries that match the prefix. */
for (auto & registry : fetchers::getRegistries(store)) {
for (auto & entry : registry->entries) {
auto from = entry.from.to_string();
if (!hasPrefix(prefix, "flake:") && hasPrefix(from, "flake:")) {
std::string from2(from, 6);
if (hasPrefix(from2, prefix))
completions->add(from2);
} else {
if (hasPrefix(from, prefix))
completions->add(from);
}
}
}
}
DerivedPath Installable::toDerivedPath()
{
auto buildables = toDerivedPaths();
if (buildables.size() != 1)
throw Error("installable '%s' evaluates to %d derivations, where only one is expected", what(), buildables.size());
return std::move(buildables[0]);
}
std::vector<ref<eval_cache::AttrCursor>>
Installable::getCursors(EvalState & state)
{
auto evalCache =
std::make_shared<nix::eval_cache::EvalCache>(std::nullopt, state,
[&]() { return toValue(state).first; });
return {evalCache->getRoot()};
}
ref<eval_cache::AttrCursor>
Installable::getCursor(EvalState & state)
{
auto cursors = getCursors(state);
if (cursors.empty())
throw Error("cannot find flake attribute '%s'", what());
return cursors[0];
}
static StorePath getDeriver(
ref<Store> store,
const Installable & i,
const StorePath & drvPath)
{
auto derivers = store->queryValidDerivers(drvPath);
if (derivers.empty())
throw Error("'%s' does not have a known deriver", i.what());
// FIXME: use all derivers?
return *derivers.begin();
}
struct InstallableStorePath : Installable
{
ref<Store> store;
StorePath storePath;
InstallableStorePath(ref<Store> store, StorePath && storePath)
: store(store), storePath(std::move(storePath)) { }
std::string what() const override { return store->printStorePath(storePath); }
DerivedPaths toDerivedPaths() override
{
if (storePath.isDerivation()) {
auto drv = store->readDerivation(storePath);
return {
DerivedPath::Built {
.drvPath = storePath,
.outputs = drv.outputNames(),
}
};
} else {
return {
DerivedPath::Opaque {
.path = storePath,
}
};
}
}
StorePathSet toDrvPaths(ref<Store> store) override
{
if (storePath.isDerivation()) {
return {storePath};
} else {
return {getDeriver(store, *this, storePath)};
}
}
std::optional<StorePath> getStorePath() override
{
return storePath;
}
};
DerivedPaths InstallableValue::toDerivedPaths()
{
DerivedPaths res;
std::map<StorePath, std::set<std::string>> drvsToOutputs;
RealisedPath::Set drvsToCopy;
// Group by derivation, helps with .all in particular
for (auto & drv : toDerivations()) {
for (auto & outputName : drv.outputsToInstall)
drvsToOutputs[drv.drvPath].insert(outputName);
drvsToCopy.insert(drv.drvPath);
}
for (auto & i : drvsToOutputs)
res.push_back(DerivedPath::Built { i.first, i.second });
return res;
}
StorePathSet InstallableValue::toDrvPaths(ref<Store> store)
{
StorePathSet res;
for (auto & drv : toDerivations())
res.insert(drv.drvPath);
return res;
}
struct InstallableAttrPath : InstallableValue
{
SourceExprCommand & cmd;
RootValue v;
std::string attrPath;
OutputsSpec outputsSpec;
InstallableAttrPath(
ref<EvalState> state,
SourceExprCommand & cmd,
Value * v,
const std::string & attrPath,
OutputsSpec outputsSpec)
: InstallableValue(state)
, cmd(cmd)
, v(allocRootValue(v))
, attrPath(attrPath)
, outputsSpec(std::move(outputsSpec))
{ }
std::string what() const override { return attrPath; }
std::pair<Value *, PosIdx> toValue(EvalState & state) override
{
auto [vRes, pos] = findAlongAttrPath(state, attrPath, *cmd.getAutoArgs(state), **v);
state.forceValue(*vRes, pos);
return {vRes, pos};
}
virtual std::vector<InstallableValue::DerivationInfo> toDerivations() override;
};
std::vector<InstallableValue::DerivationInfo> InstallableAttrPath::toDerivations()
{
auto v = toValue(*state).first;
Bindings & autoArgs = *cmd.getAutoArgs(*state);
DrvInfos drvInfos;
getDerivations(*state, *v, "", autoArgs, drvInfos, false);
std::vector<DerivationInfo> res;
for (auto & drvInfo : drvInfos) {
auto drvPath = drvInfo.queryDrvPath();
if (!drvPath)
throw Error("'%s' is not a derivation", what());
std::set<std::string> outputsToInstall;
if (auto outputNames = std::get_if<OutputNames>(&outputsSpec))
outputsToInstall = *outputNames;
else
for (auto & output : drvInfo.queryOutputs(false, std::get_if<DefaultOutputs>(&outputsSpec)))
outputsToInstall.insert(output.first);
res.push_back(DerivationInfo {
.drvPath = *drvPath,
.outputsToInstall = std::move(outputsToInstall)
});
}
return res;
}
std::vector<std::string> InstallableFlake::getActualAttrPaths()
{
std::vector<std::string> res;
for (auto & prefix : prefixes)
res.push_back(prefix + *attrPaths.begin());
for (auto & s : attrPaths)
res.push_back(s);
return res;
}
Value * InstallableFlake::getFlakeOutputs(EvalState & state, const flake::LockedFlake & lockedFlake)
{
auto vFlake = state.allocValue();
callFlake(state, lockedFlake, *vFlake);
auto aOutputs = vFlake->attrs->get(state.symbols.create("outputs"));
assert(aOutputs);
state.forceValue(*aOutputs->value, [&]() { return aOutputs->value->determinePos(noPos); });
return aOutputs->value;
}
ref<eval_cache::EvalCache> openEvalCache(
EvalState & state,
std::shared_ptr<flake::LockedFlake> lockedFlake)
{
auto fingerprint = lockedFlake->getFingerprint();
return make_ref<nix::eval_cache::EvalCache>(
evalSettings.useEvalCache && evalSettings.pureEval
? std::optional { std::cref(fingerprint) }
: std::nullopt,
state,
[&state, lockedFlake]()
{
/* For testing whether the evaluation cache is
complete. */
if (getEnv("NIX_ALLOW_EVAL").value_or("1") == "0")
throw Error("not everything is cached, but evaluation is not allowed");
auto vFlake = state.allocValue();
flake::callFlake(state, *lockedFlake, *vFlake);
state.forceAttrs(*vFlake, noPos);
auto aOutputs = vFlake->attrs->get(state.symbols.create("outputs"));
assert(aOutputs);
return aOutputs->value;
});
}
static std::string showAttrPaths(const std::vector<std::string> & paths)
{
std::string s;
for (const auto & [n, i] : enumerate(paths)) {
if (n > 0) s += n + 1 == paths.size() ? " or " : ", ";
s += '\''; s += i; s += '\'';
}
return s;
}
InstallableFlake::InstallableFlake(
SourceExprCommand * cmd,
ref<EvalState> state,
FlakeRef && flakeRef,
std::string_view fragment,
OutputsSpec outputsSpec,
Strings attrPaths,
Strings prefixes,
const flake::LockFlags & lockFlags)
: InstallableValue(state),
flakeRef(flakeRef),
attrPaths(fragment == "" ? attrPaths : Strings{(std::string) fragment}),
prefixes(fragment == "" ? Strings{} : prefixes),
outputsSpec(std::move(outputsSpec)),
lockFlags(lockFlags)
{
if (cmd && cmd->getAutoArgs(*state)->size())
throw UsageError("'--arg' and '--argstr' are incompatible with flakes");
}
std::tuple<std::string, FlakeRef, InstallableValue::DerivationInfo> InstallableFlake::toDerivation()
{
auto attr = getCursor(*state);
auto attrPath = attr->getAttrPathStr();
if (!attr->isDerivation())
throw Error("flake output attribute '%s' is not a derivation", attrPath);
auto drvPath = attr->forceDerivation();
std::set<std::string> outputsToInstall;
if (auto aMeta = attr->maybeGetAttr(state->sMeta))
if (auto aOutputsToInstall = aMeta->maybeGetAttr("outputsToInstall"))
for (auto & s : aOutputsToInstall->getListOfStrings())
outputsToInstall.insert(s);
if (outputsToInstall.empty() || std::get_if<AllOutputs>(&outputsSpec)) {
outputsToInstall.clear();
if (auto aOutputs = attr->maybeGetAttr(state->sOutputs))
for (auto & s : aOutputs->getListOfStrings())
outputsToInstall.insert(s);
}
if (outputsToInstall.empty())
outputsToInstall.insert("out");
if (auto outputNames = std::get_if<OutputNames>(&outputsSpec))
outputsToInstall = *outputNames;
auto drvInfo = DerivationInfo {
.drvPath = std::move(drvPath),
.outputsToInstall = std::move(outputsToInstall),
};
return {attrPath, getLockedFlake()->flake.lockedRef, std::move(drvInfo)};
}
std::vector<InstallableValue::DerivationInfo> InstallableFlake::toDerivations()
{
std::vector<DerivationInfo> res;
res.push_back(std::get<2>(toDerivation()));
return res;
}
std::pair<Value *, PosIdx> InstallableFlake::toValue(EvalState & state)
{
return {&getCursor(state)->forceValue(), noPos};
}
std::vector<ref<eval_cache::AttrCursor>>
InstallableFlake::getCursors(EvalState & state)
{
auto evalCache = openEvalCache(state,
std::make_shared<flake::LockedFlake>(lockFlake(state, flakeRef, lockFlags)));
auto root = evalCache->getRoot();
std::vector<ref<eval_cache::AttrCursor>> res;
for (auto & attrPath : getActualAttrPaths()) {
auto attr = root->findAlongAttrPath(parseAttrPath(state, attrPath));
if (attr) res.push_back(ref(*attr));
}
return res;
}
ref<eval_cache::AttrCursor> InstallableFlake::getCursor(EvalState & state)
{
auto lockedFlake = getLockedFlake();
auto cache = openEvalCache(state, lockedFlake);
auto root = cache->getRoot();
Suggestions suggestions;
auto attrPaths = getActualAttrPaths();
for (auto & attrPath : attrPaths) {
debug("trying flake output attribute '%s'", attrPath);
auto attrOrSuggestions = root->findAlongAttrPath(
parseAttrPath(state, attrPath),
true
);
if (!attrOrSuggestions) {
suggestions += attrOrSuggestions.getSuggestions();
continue;
}
return *attrOrSuggestions;
}
throw Error(
suggestions,
"flake '%s' does not provide attribute %s",
flakeRef,
showAttrPaths(attrPaths));
}
std::shared_ptr<flake::LockedFlake> InstallableFlake::getLockedFlake() const
{
if (!_lockedFlake) {
flake::LockFlags lockFlagsApplyConfig = lockFlags;
lockFlagsApplyConfig.applyNixConfig = true;
_lockedFlake = std::make_shared<flake::LockedFlake>(lockFlake(*state, flakeRef, lockFlagsApplyConfig));
}
return _lockedFlake;
}
FlakeRef InstallableFlake::nixpkgsFlakeRef() const
{
auto lockedFlake = getLockedFlake();
if (auto nixpkgsInput = lockedFlake->lockFile.findInput({"nixpkgs"})) {
if (auto lockedNode = std::dynamic_pointer_cast<const flake::LockedNode>(nixpkgsInput)) {
debug("using nixpkgs flake '%s'", lockedNode->lockedRef);
return std::move(lockedNode->lockedRef);
}
}
return Installable::nixpkgsFlakeRef();
}
std::vector<std::shared_ptr<Installable>> SourceExprCommand::parseInstallables(
ref<Store> store, std::vector<std::string> ss)
{
std::vector<std::shared_ptr<Installable>> result;
if (readOnlyMode) {
settings.readOnlyMode = true;
}
if (file || expr) {
if (file && expr)
throw UsageError("'--file' and '--expr' are exclusive");
// FIXME: backward compatibility hack
if (file) evalSettings.pureEval = false;
auto state = getEvalState();
auto vFile = state->allocValue();
if (file == "-") {
auto e = state->parseStdin();
state->eval(e, *vFile);
} else if (file)
state->evalFile(lookupFileArg(*state, *file), *vFile);
else {
auto e = state->parseExprFromString(*expr, absPath("."));
state->eval(e, *vFile);
}
for (auto & s : ss) {
auto [prefix, outputsSpec] = parseOutputsSpec(s);
result.push_back(
std::make_shared<InstallableAttrPath>(
state, *this, vFile,
prefix == "." ? "" : prefix,
outputsSpec));
}
} else {
for (auto & s : ss) {
std::exception_ptr ex;
if (s.find('/') != std::string::npos) {
try {
result.push_back(std::make_shared<InstallableStorePath>(store, store->followLinksToStorePath(s)));
continue;
} catch (BadStorePath &) {
} catch (...) {
if (!ex)
ex = std::current_exception();
}
}
try {
auto [flakeRef, fragment, outputsSpec] = parseFlakeRefWithFragmentAndOutputsSpec(s, absPath("."));
result.push_back(std::make_shared<InstallableFlake>(
this,
getEvalState(),
std::move(flakeRef),
fragment,
outputsSpec,
getDefaultFlakeAttrPaths(),
getDefaultFlakeAttrPathPrefixes(),
lockFlags));
continue;
} catch (...) {
ex = std::current_exception();
}
std::rethrow_exception(ex);
}
}
return result;
}
std::shared_ptr<Installable> SourceExprCommand::parseInstallable(
ref<Store> store, const std::string & installable)
{
auto installables = parseInstallables(store, {installable});
assert(installables.size() == 1);
return installables.front();
}
BuiltPaths Installable::build(
ref<Store> evalStore,
ref<Store> store,
Realise mode,
const std::vector<std::shared_ptr<Installable>> & installables,
BuildMode bMode)
{
BuiltPaths res;
for (auto & [_, builtPath] : build2(evalStore, store, mode, installables, bMode))
res.push_back(builtPath);
return res;
}
std::vector<std::pair<std::shared_ptr<Installable>, BuiltPath>> Installable::build2(
ref<Store> evalStore,
ref<Store> store,
Realise mode,
const std::vector<std::shared_ptr<Installable>> & installables,
BuildMode bMode)
{
if (mode == Realise::Nothing)
settings.readOnlyMode = true;
std::vector<DerivedPath> pathsToBuild;
std::map<DerivedPath, std::vector<std::shared_ptr<Installable>>> backmap;
for (auto & i : installables) {
for (auto b : i->toDerivedPaths()) {
pathsToBuild.push_back(b);
backmap[b].push_back(i);
}
}
std::vector<std::pair<std::shared_ptr<Installable>, BuiltPath>> res;
switch (mode) {
case Realise::Nothing:
case Realise::Derivation:
printMissing(store, pathsToBuild, lvlError);
for (auto & path : pathsToBuild) {
for (auto & installable : backmap[path]) {
std::visit(overloaded {
[&](const DerivedPath::Built & bfd) {
OutputPathMap outputs;
auto drv = evalStore->readDerivation(bfd.drvPath);
auto outputHashes = staticOutputHashes(*evalStore, drv); // FIXME: expensive
auto drvOutputs = drv.outputsAndOptPaths(*store);
for (auto & output : bfd.outputs) {
auto outputHash = get(outputHashes, output);
if (!outputHash)
throw Error(
"the derivation '%s' doesn't have an output named '%s'",
store->printStorePath(bfd.drvPath), output);
if (settings.isExperimentalFeatureEnabled(Xp::CaDerivations)) {
DrvOutput outputId { *outputHash, output };
auto realisation = store->queryRealisation(outputId);
if (!realisation)
throw Error(
"cannot operate on an output of the "
"unbuilt derivation '%s'",
outputId.to_string());
outputs.insert_or_assign(output, realisation->outPath);
} else {
// If ca-derivations isn't enabled, assume that
// the output path is statically known.
auto drvOutput = get(drvOutputs, output);
assert(drvOutput);
assert(drvOutput->second);
outputs.insert_or_assign(
output, *drvOutput->second);
}
}
res.push_back({installable, BuiltPath::Built { bfd.drvPath, outputs }});
},
[&](const DerivedPath::Opaque & bo) {
res.push_back({installable, BuiltPath::Opaque { bo.path }});
},
}, path.raw());
}
}
break;
case Realise::Outputs: {
for (auto & buildResult : store->buildPathsWithResults(pathsToBuild, bMode, evalStore)) {
if (!buildResult.success())
buildResult.rethrow();
for (auto & installable : backmap[buildResult.path]) {
std::visit(overloaded {
[&](const DerivedPath::Built & bfd) {
std::map<std::string, StorePath> outputs;
for (auto & path : buildResult.builtOutputs)
outputs.emplace(path.first.outputName, path.second.outPath);
res.push_back({installable, BuiltPath::Built { bfd.drvPath, outputs }});
},
[&](const DerivedPath::Opaque & bo) {
res.push_back({installable, BuiltPath::Opaque { bo.path }});
},
}, buildResult.path.raw());
}
}
break;
}
default:
assert(false);
}
return res;
}
BuiltPaths Installable::toBuiltPaths(
ref<Store> evalStore,
ref<Store> store,
Realise mode,
OperateOn operateOn,
const std::vector<std::shared_ptr<Installable>> & installables)
{
if (operateOn == OperateOn::Output)
return Installable::build(evalStore, store, mode, installables);
else {
if (mode == Realise::Nothing)
settings.readOnlyMode = true;
BuiltPaths res;
for (auto & drvPath : Installable::toDerivations(store, installables, true))
res.push_back(BuiltPath::Opaque{drvPath});
return res;
}
}
StorePathSet Installable::toStorePaths(
ref<Store> evalStore,
ref<Store> store,
Realise mode, OperateOn operateOn,
const std::vector<std::shared_ptr<Installable>> & installables)
{
StorePathSet outPaths;
for (auto & path : toBuiltPaths(evalStore, store, mode, operateOn, installables)) {
auto thisOutPaths = path.outPaths();
outPaths.insert(thisOutPaths.begin(), thisOutPaths.end());
}
return outPaths;
}
StorePath Installable::toStorePath(
ref<Store> evalStore,
ref<Store> store,
Realise mode, OperateOn operateOn,
std::shared_ptr<Installable> installable)
{
auto paths = toStorePaths(evalStore, store, mode, operateOn, {installable});
if (paths.size() != 1)
throw Error("argument '%s' should evaluate to one store path", installable->what());
return *paths.begin();
}
StorePathSet Installable::toDerivations(
ref<Store> store,
const std::vector<std::shared_ptr<Installable>> & installables,
bool useDeriver)
{
StorePathSet drvPaths;
for (const auto & i : installables)
for (const auto & b : i->toDerivedPaths())
std::visit(overloaded {
[&](const DerivedPath::Opaque & bo) {
if (!useDeriver)
throw Error("argument '%s' did not evaluate to a derivation", i->what());
drvPaths.insert(getDeriver(store, *i, bo.path));
},
[&](const DerivedPath::Built & bfd) {
drvPaths.insert(bfd.drvPath);
},
}, b.raw());
return drvPaths;
}
InstallablesCommand::InstallablesCommand()
{
expectArgs({
.label = "installables",
.handler = {&_installables},
.completer = {[&](size_t, std::string_view prefix) {
completeInstallable(prefix);
}}
});
}
void InstallablesCommand::prepare()
{
if (_installables.empty() && useDefaultInstallables())
// FIXME: commands like "nix profile install" should not have a
// default, probably.
_installables.push_back(".");
installables = parseInstallables(getStore(), _installables);
}
std::optional<FlakeRef> InstallablesCommand::getFlakeRefForCompletion()
{
if (_installables.empty()) {
if (useDefaultInstallables())
return parseFlakeRefWithFragment(".", absPath(".")).first;
return {};
}
return parseFlakeRefWithFragment(_installables.front(), absPath(".")).first;
}
InstallableCommand::InstallableCommand(bool supportReadOnlyMode)
: SourceExprCommand(supportReadOnlyMode)
{
expectArgs({
.label = "installable",
.optional = true,
.handler = {&_installable},
.completer = {[&](size_t, std::string_view prefix) {
completeInstallable(prefix);
}}
});
}
void InstallableCommand::prepare()
{
installable = parseInstallable(getStore(), _installable);
}
}