mirror of
https://github.com/privatevoid-net/nix-super.git
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0258ac9c2a
It is independent of SourceExprCommand, which is about parsing installables, except for the fact that parsing installables is one of the many things influenced by read-only mode.
742 lines
24 KiB
C++
742 lines
24 KiB
C++
#include "globals.hh"
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#include "installables.hh"
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#include "installable-derived-path.hh"
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#include "installable-attr-path.hh"
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#include "installable-flake.hh"
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#include "outputs-spec.hh"
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#include "util.hh"
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#include "command.hh"
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#include "attr-path.hh"
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#include "common-eval-args.hh"
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#include "derivations.hh"
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#include "eval-inline.hh"
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#include "eval.hh"
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#include "get-drvs.hh"
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#include "store-api.hh"
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#include "shared.hh"
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#include "flake/flake.hh"
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#include "eval-cache.hh"
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#include "url.hh"
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#include "registry.hh"
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#include "build-result.hh"
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#include <regex>
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#include <queue>
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#include <nlohmann/json.hpp>
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namespace nix {
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MixFlakeOptions::MixFlakeOptions()
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{
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auto category = "Common flake-related options";
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addFlag({
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.longName = "recreate-lock-file",
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.description = "Recreate the flake's lock file from scratch.",
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.category = category,
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.handler = {&lockFlags.recreateLockFile, true}
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});
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addFlag({
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.longName = "no-update-lock-file",
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.description = "Do not allow any updates to the flake's lock file.",
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.category = category,
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.handler = {&lockFlags.updateLockFile, false}
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});
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addFlag({
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.longName = "no-write-lock-file",
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.description = "Do not write the flake's newly generated lock file.",
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.category = category,
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.handler = {&lockFlags.writeLockFile, false}
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});
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addFlag({
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.longName = "no-registries",
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.description =
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"Don't allow lookups in the flake registries. This option is deprecated; use `--no-use-registries`.",
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.category = category,
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.handler = {[&]() {
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lockFlags.useRegistries = false;
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warn("'--no-registries' is deprecated; use '--no-use-registries'");
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}}
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});
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addFlag({
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.longName = "commit-lock-file",
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.description = "Commit changes to the flake's lock file.",
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.category = category,
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.handler = {&lockFlags.commitLockFile, true}
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});
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addFlag({
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.longName = "update-input",
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.description = "Update a specific flake input (ignoring its previous entry in the lock file).",
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.category = category,
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.labels = {"input-path"},
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.handler = {[&](std::string s) {
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lockFlags.inputUpdates.insert(flake::parseInputPath(s));
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}},
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.completer = {[&](size_t, std::string_view prefix) {
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needsFlakeInputCompletion = {std::string(prefix)};
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}}
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});
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addFlag({
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.longName = "override-input",
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.description = "Override a specific flake input (e.g. `dwarffs/nixpkgs`). This implies `--no-write-lock-file`.",
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.category = category,
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.labels = {"input-path", "flake-url"},
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.handler = {[&](std::string inputPath, std::string flakeRef) {
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lockFlags.writeLockFile = false;
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lockFlags.inputOverrides.insert_or_assign(
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flake::parseInputPath(inputPath),
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parseFlakeRef(flakeRef, absPath("."), true));
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}},
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.completer = {[&](size_t n, std::string_view prefix) {
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if (n == 0)
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needsFlakeInputCompletion = {std::string(prefix)};
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else if (n == 1)
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completeFlakeRef(getEvalState()->store, prefix);
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}}
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});
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addFlag({
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.longName = "inputs-from",
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.description = "Use the inputs of the specified flake as registry entries.",
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.category = category,
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.labels = {"flake-url"},
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.handler = {[&](std::string flakeRef) {
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auto evalState = getEvalState();
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auto flake = flake::lockFlake(
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*evalState,
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parseFlakeRef(flakeRef, absPath(".")),
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{ .writeLockFile = false });
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for (auto & [inputName, input] : flake.lockFile.root->inputs) {
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auto input2 = flake.lockFile.findInput({inputName}); // resolve 'follows' nodes
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if (auto input3 = std::dynamic_pointer_cast<const flake::LockedNode>(input2)) {
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overrideRegistry(
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fetchers::Input::fromAttrs({{"type","indirect"}, {"id", inputName}}),
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input3->lockedRef.input,
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{});
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}
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}
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}},
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.completer = {[&](size_t, std::string_view prefix) {
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completeFlakeRef(getEvalState()->store, prefix);
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}}
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});
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}
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void MixFlakeOptions::completeFlakeInput(std::string_view prefix)
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{
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auto evalState = getEvalState();
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for (auto & flakeRefS : getFlakesForCompletion()) {
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auto flakeRef = parseFlakeRefWithFragment(expandTilde(flakeRefS), absPath(".")).first;
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auto flake = flake::getFlake(*evalState, flakeRef, true);
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for (auto & input : flake.inputs)
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if (hasPrefix(input.first, prefix))
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completions->add(input.first);
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}
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}
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void MixFlakeOptions::completionHook()
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{
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if (auto & prefix = needsFlakeInputCompletion)
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completeFlakeInput(*prefix);
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}
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SourceExprCommand::SourceExprCommand()
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{
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addFlag({
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.longName = "file",
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.shortName = 'f',
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.description =
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"Interpret installables as attribute paths relative to the Nix expression stored in *file*. "
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"If *file* is the character -, then a Nix expression will be read from standard input. "
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"Implies `--impure`.",
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.category = installablesCategory,
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.labels = {"file"},
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.handler = {&file},
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.completer = completePath
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});
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addFlag({
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.longName = "expr",
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.description = "Interpret installables as attribute paths relative to the Nix expression *expr*.",
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.category = installablesCategory,
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.labels = {"expr"},
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.handler = {&expr}
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});
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}
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MixReadOnlyOption::MixReadOnlyOption()
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{
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addFlag({
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.longName = "read-only",
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.description =
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"Do not instantiate each evaluated derivation. "
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"This improves performance, but can cause errors when accessing "
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"store paths of derivations during evaluation.",
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.handler = {&settings.readOnlyMode, true},
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});
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}
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Strings SourceExprCommand::getDefaultFlakeAttrPaths()
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{
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return {
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"packages." + settings.thisSystem.get() + ".default",
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"defaultPackage." + settings.thisSystem.get()
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};
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}
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Strings SourceExprCommand::getDefaultFlakeAttrPathPrefixes()
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{
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return {
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// As a convenience, look for the attribute in
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// 'outputs.packages'.
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"packages." + settings.thisSystem.get() + ".",
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// As a temporary hack until Nixpkgs is properly converted
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// to provide a clean 'packages' set, look in 'legacyPackages'.
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"legacyPackages." + settings.thisSystem.get() + "."
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};
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}
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void SourceExprCommand::completeInstallable(std::string_view prefix)
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{
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try {
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if (file) {
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completionType = ctAttrs;
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evalSettings.pureEval = false;
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auto state = getEvalState();
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Expr *e = state->parseExprFromFile(
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resolveExprPath(state->checkSourcePath(lookupFileArg(*state, *file)))
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);
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Value root;
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state->eval(e, root);
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auto autoArgs = getAutoArgs(*state);
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std::string prefix_ = std::string(prefix);
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auto sep = prefix_.rfind('.');
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std::string searchWord;
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if (sep != std::string::npos) {
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searchWord = prefix_.substr(sep + 1, std::string::npos);
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prefix_ = prefix_.substr(0, sep);
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} else {
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searchWord = prefix_;
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prefix_ = "";
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}
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auto [v, pos] = findAlongAttrPath(*state, prefix_, *autoArgs, root);
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Value &v1(*v);
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state->forceValue(v1, pos);
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Value v2;
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state->autoCallFunction(*autoArgs, v1, v2);
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if (v2.type() == nAttrs) {
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for (auto & i : *v2.attrs) {
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std::string name = state->symbols[i.name];
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if (name.find(searchWord) == 0) {
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if (prefix_ == "")
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completions->add(name);
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else
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completions->add(prefix_ + "." + name);
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}
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}
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}
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} else {
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completeFlakeRefWithFragment(
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getEvalState(),
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lockFlags,
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getDefaultFlakeAttrPathPrefixes(),
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getDefaultFlakeAttrPaths(),
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prefix);
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}
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} catch (EvalError&) {
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// Don't want eval errors to mess-up with the completion engine, so let's just swallow them
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}
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}
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void completeFlakeRefWithFragment(
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ref<EvalState> evalState,
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flake::LockFlags lockFlags,
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Strings attrPathPrefixes,
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const Strings & defaultFlakeAttrPaths,
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std::string_view prefix)
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{
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/* Look for flake output attributes that match the
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prefix. */
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try {
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auto hash = prefix.find('#');
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if (hash == std::string::npos) {
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completeFlakeRef(evalState->store, prefix);
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} else {
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completionType = ctAttrs;
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auto fragment = prefix.substr(hash + 1);
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auto flakeRefS = std::string(prefix.substr(0, hash));
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auto flakeRef = parseFlakeRef(expandTilde(flakeRefS), absPath("."));
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auto evalCache = openEvalCache(*evalState,
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std::make_shared<flake::LockedFlake>(lockFlake(*evalState, flakeRef, lockFlags)));
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auto root = evalCache->getRoot();
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/* Complete 'fragment' relative to all the
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attrpath prefixes as well as the root of the
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flake. */
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attrPathPrefixes.push_back("");
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for (auto & attrPathPrefixS : attrPathPrefixes) {
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auto attrPathPrefix = parseAttrPath(*evalState, attrPathPrefixS);
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auto attrPathS = attrPathPrefixS + std::string(fragment);
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auto attrPath = parseAttrPath(*evalState, attrPathS);
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std::string lastAttr;
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if (!attrPath.empty() && !hasSuffix(attrPathS, ".")) {
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lastAttr = evalState->symbols[attrPath.back()];
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attrPath.pop_back();
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}
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auto attr = root->findAlongAttrPath(attrPath);
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if (!attr) continue;
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for (auto & attr2 : (*attr)->getAttrs()) {
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if (hasPrefix(evalState->symbols[attr2], lastAttr)) {
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auto attrPath2 = (*attr)->getAttrPath(attr2);
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/* Strip the attrpath prefix. */
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attrPath2.erase(attrPath2.begin(), attrPath2.begin() + attrPathPrefix.size());
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completions->add(flakeRefS + "#" + concatStringsSep(".", evalState->symbols.resolve(attrPath2)));
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}
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}
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}
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/* And add an empty completion for the default
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attrpaths. */
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if (fragment.empty()) {
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for (auto & attrPath : defaultFlakeAttrPaths) {
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auto attr = root->findAlongAttrPath(parseAttrPath(*evalState, attrPath));
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if (!attr) continue;
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completions->add(flakeRefS + "#");
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}
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}
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}
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} catch (Error & e) {
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warn(e.msg());
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}
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}
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void completeFlakeRef(ref<Store> store, std::string_view prefix)
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{
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if (!settings.isExperimentalFeatureEnabled(Xp::Flakes))
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return;
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if (prefix == "")
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completions->add(".");
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completeDir(0, prefix);
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/* Look for registry entries that match the prefix. */
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for (auto & registry : fetchers::getRegistries(store)) {
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for (auto & entry : registry->entries) {
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auto from = entry.from.to_string();
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if (!hasPrefix(prefix, "flake:") && hasPrefix(from, "flake:")) {
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std::string from2(from, 6);
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if (hasPrefix(from2, prefix))
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completions->add(from2);
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} else {
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if (hasPrefix(from, prefix))
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completions->add(from);
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}
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}
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}
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}
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DerivedPathWithInfo Installable::toDerivedPath()
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{
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auto buildables = toDerivedPaths();
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if (buildables.size() != 1)
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throw Error("installable '%s' evaluates to %d derivations, where only one is expected", what(), buildables.size());
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return std::move(buildables[0]);
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}
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std::vector<ref<eval_cache::AttrCursor>>
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Installable::getCursors(EvalState & state)
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{
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auto evalCache =
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std::make_shared<nix::eval_cache::EvalCache>(std::nullopt, state,
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[&]() { return toValue(state).first; });
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return {evalCache->getRoot()};
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}
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ref<eval_cache::AttrCursor>
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Installable::getCursor(EvalState & state)
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{
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/* Although getCursors should return at least one element, in case it doesn't,
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bound check to avoid an undefined behavior for vector[0] */
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return getCursors(state).at(0);
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}
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static StorePath getDeriver(
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ref<Store> store,
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const Installable & i,
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const StorePath & drvPath)
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{
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auto derivers = store->queryValidDerivers(drvPath);
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if (derivers.empty())
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throw Error("'%s' does not have a known deriver", i.what());
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// FIXME: use all derivers?
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return *derivers.begin();
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}
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ref<eval_cache::EvalCache> openEvalCache(
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EvalState & state,
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std::shared_ptr<flake::LockedFlake> lockedFlake)
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{
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auto fingerprint = lockedFlake->getFingerprint();
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return make_ref<nix::eval_cache::EvalCache>(
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evalSettings.useEvalCache && evalSettings.pureEval
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? std::optional { std::cref(fingerprint) }
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: std::nullopt,
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state,
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[&state, lockedFlake]()
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{
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/* For testing whether the evaluation cache is
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complete. */
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if (getEnv("NIX_ALLOW_EVAL").value_or("1") == "0")
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throw Error("not everything is cached, but evaluation is not allowed");
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auto vFlake = state.allocValue();
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flake::callFlake(state, *lockedFlake, *vFlake);
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state.forceAttrs(*vFlake, noPos, "while parsing cached flake data");
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auto aOutputs = vFlake->attrs->get(state.symbols.create("outputs"));
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assert(aOutputs);
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return aOutputs->value;
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});
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}
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std::vector<std::shared_ptr<Installable>> SourceExprCommand::parseInstallables(
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ref<Store> store, std::vector<std::string> ss)
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{
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std::vector<std::shared_ptr<Installable>> result;
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if (file || expr) {
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if (file && expr)
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throw UsageError("'--file' and '--expr' are exclusive");
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// FIXME: backward compatibility hack
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if (file) evalSettings.pureEval = false;
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auto state = getEvalState();
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auto vFile = state->allocValue();
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if (file == "-") {
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auto e = state->parseStdin();
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state->eval(e, *vFile);
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}
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else if (file)
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state->evalFile(lookupFileArg(*state, *file), *vFile);
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else {
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auto e = state->parseExprFromString(*expr, absPath("."));
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state->eval(e, *vFile);
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}
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for (auto & s : ss) {
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auto [prefix, extendedOutputsSpec] = ExtendedOutputsSpec::parse(s);
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result.push_back(
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std::make_shared<InstallableAttrPath>(
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InstallableAttrPath::parse(
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state, *this, vFile, prefix, extendedOutputsSpec)));
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}
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} else {
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for (auto & s : ss) {
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std::exception_ptr ex;
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auto [prefix_, extendedOutputsSpec_] = ExtendedOutputsSpec::parse(s);
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// To avoid clang's pedantry
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auto prefix = std::move(prefix_);
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auto extendedOutputsSpec = std::move(extendedOutputsSpec_);
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if (prefix.find('/') != std::string::npos) {
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try {
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result.push_back(std::make_shared<InstallableDerivedPath>(
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InstallableDerivedPath::parse(store, prefix, extendedOutputsSpec)));
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continue;
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} catch (BadStorePath &) {
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} catch (...) {
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if (!ex)
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ex = std::current_exception();
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}
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}
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try {
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auto [flakeRef, fragment] = parseFlakeRefWithFragment(std::string { prefix }, absPath("."));
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result.push_back(std::make_shared<InstallableFlake>(
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this,
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getEvalState(),
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std::move(flakeRef),
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fragment,
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extendedOutputsSpec,
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getDefaultFlakeAttrPaths(),
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getDefaultFlakeAttrPathPrefixes(),
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lockFlags));
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continue;
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} catch (...) {
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ex = std::current_exception();
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}
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std::rethrow_exception(ex);
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}
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}
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return result;
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}
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std::shared_ptr<Installable> SourceExprCommand::parseInstallable(
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ref<Store> store, const std::string & installable)
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{
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auto installables = parseInstallables(store, {installable});
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assert(installables.size() == 1);
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return installables.front();
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}
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std::vector<BuiltPathWithResult> Installable::build(
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ref<Store> evalStore,
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ref<Store> store,
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Realise mode,
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const std::vector<std::shared_ptr<Installable>> & installables,
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BuildMode bMode)
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{
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std::vector<BuiltPathWithResult> res;
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for (auto & [_, builtPathWithResult] : build2(evalStore, store, mode, installables, bMode))
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res.push_back(builtPathWithResult);
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return res;
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}
|
|
|
|
std::vector<std::pair<std::shared_ptr<Installable>, BuiltPathWithResult>> 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;
|
|
|
|
struct Aux
|
|
{
|
|
ExtraPathInfo info;
|
|
std::shared_ptr<Installable> installable;
|
|
};
|
|
|
|
std::vector<DerivedPath> pathsToBuild;
|
|
std::map<DerivedPath, std::vector<Aux>> backmap;
|
|
|
|
for (auto & i : installables) {
|
|
for (auto b : i->toDerivedPaths()) {
|
|
pathsToBuild.push_back(b.path);
|
|
backmap[b.path].push_back({.info = b.info, .installable = i});
|
|
}
|
|
}
|
|
|
|
std::vector<std::pair<std::shared_ptr<Installable>, BuiltPathWithResult>> res;
|
|
|
|
switch (mode) {
|
|
|
|
case Realise::Nothing:
|
|
case Realise::Derivation:
|
|
printMissing(store, pathsToBuild, lvlError);
|
|
|
|
for (auto & path : pathsToBuild) {
|
|
for (auto & aux : backmap[path]) {
|
|
std::visit(overloaded {
|
|
[&](const DerivedPath::Built & bfd) {
|
|
auto outputs = resolveDerivedPath(*store, bfd, &*evalStore);
|
|
res.push_back({aux.installable, {
|
|
.path = BuiltPath::Built { bfd.drvPath, outputs },
|
|
.info = aux.info}});
|
|
},
|
|
[&](const DerivedPath::Opaque & bo) {
|
|
res.push_back({aux.installable, {
|
|
.path = BuiltPath::Opaque { bo.path },
|
|
.info = aux.info}});
|
|
},
|
|
}, path.raw());
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
case Realise::Outputs: {
|
|
if (settings.printMissing)
|
|
printMissing(store, pathsToBuild, lvlInfo);
|
|
|
|
for (auto & buildResult : store->buildPathsWithResults(pathsToBuild, bMode, evalStore)) {
|
|
if (!buildResult.success())
|
|
buildResult.rethrow();
|
|
|
|
for (auto & aux : 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({aux.installable, {
|
|
.path = BuiltPath::Built { bfd.drvPath, outputs },
|
|
.info = aux.info,
|
|
.result = buildResult}});
|
|
},
|
|
[&](const DerivedPath::Opaque & bo) {
|
|
res.push_back({aux.installable, {
|
|
.path = BuiltPath::Opaque { bo.path },
|
|
.info = aux.info,
|
|
.result = buildResult}});
|
|
},
|
|
}, 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) {
|
|
BuiltPaths res;
|
|
for (auto & p : Installable::build(evalStore, store, mode, installables))
|
|
res.push_back(p.path);
|
|
return res;
|
|
} 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.path.raw());
|
|
|
|
return drvPaths;
|
|
}
|
|
|
|
InstallablesCommand::InstallablesCommand()
|
|
{
|
|
expectArgs({
|
|
.label = "installables",
|
|
.handler = {&_installables},
|
|
.completer = {[&](size_t, std::string_view prefix) {
|
|
completeInstallable(prefix);
|
|
}}
|
|
});
|
|
}
|
|
|
|
void InstallablesCommand::prepare()
|
|
{
|
|
installables = load();
|
|
}
|
|
|
|
Installables InstallablesCommand::load()
|
|
{
|
|
if (_installables.empty() && useDefaultInstallables())
|
|
// FIXME: commands like "nix profile install" should not have a
|
|
// default, probably.
|
|
_installables.push_back(".");
|
|
return parseInstallables(getStore(), _installables);
|
|
}
|
|
|
|
std::vector<std::string> InstallablesCommand::getFlakesForCompletion()
|
|
{
|
|
if (_installables.empty() && useDefaultInstallables())
|
|
return {"."};
|
|
return _installables;
|
|
}
|
|
|
|
InstallableCommand::InstallableCommand()
|
|
: SourceExprCommand()
|
|
{
|
|
expectArgs({
|
|
.label = "installable",
|
|
.optional = true,
|
|
.handler = {&_installable},
|
|
.completer = {[&](size_t, std::string_view prefix) {
|
|
completeInstallable(prefix);
|
|
}}
|
|
});
|
|
}
|
|
|
|
void InstallableCommand::prepare()
|
|
{
|
|
installable = parseInstallable(getStore(), _installable);
|
|
}
|
|
|
|
}
|