forked from lix-project/lix
128 lines
4 KiB
C++
128 lines
4 KiB
C++
// FIXME: integrate this with nix path-info?
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#include "command.hh"
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#include "common-args.hh"
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#include "store-api.hh"
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#include "archive.hh"
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#include "json.hh"
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#include "derivations.hh"
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using namespace nix;
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struct CmdShowDerivation : InstallablesCommand
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{
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bool recursive = false;
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CmdShowDerivation()
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{
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addFlag({
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.longName = "recursive",
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.shortName = 'r',
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.description = "include the dependencies of the specified derivations",
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.handler = {&recursive, true}
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});
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}
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std::string description() override
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{
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return "show the contents of a store derivation";
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}
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Examples examples() override
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{
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return {
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Example{
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"To show the store derivation that results from evaluating the Hello package:",
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"nix show-derivation nixpkgs#hello"
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},
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Example{
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"To show the full derivation graph (if available) that produced your NixOS system:",
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"nix show-derivation -r /run/current-system"
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},
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};
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}
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Category category() override { return catUtility; }
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void run(ref<Store> store) override
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{
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auto drvPaths = toDerivations(store, installables, true);
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if (recursive) {
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StorePathSet closure;
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store->computeFSClosure(drvPaths, closure);
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drvPaths = std::move(closure);
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}
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{
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JSONObject jsonRoot(std::cout, true);
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for (auto & drvPath : drvPaths) {
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if (!drvPath.isDerivation()) continue;
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auto drvObj(jsonRoot.object(store->printStorePath(drvPath)));
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auto drv = store->readDerivation(drvPath);
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{
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auto outputsObj(drvObj.object("outputs"));
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for (auto & [_outputName, output] : drv.outputs) {
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auto & outputName = _outputName; // work around clang bug
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auto outputObj { outputsObj.object(outputName) };
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std::visit(overloaded {
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[&](DerivationOutputInputAddressed doi) {
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outputObj.attr("path", store->printStorePath(doi.path));
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},
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[&](DerivationOutputCAFixed dof) {
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outputObj.attr("path", store->printStorePath(dof.path(*store, drv.name, outputName)));
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outputObj.attr("hashAlgo", dof.hash.printMethodAlgo());
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outputObj.attr("hash", dof.hash.hash.to_string(Base16, false));
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},
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[&](DerivationOutputCAFloating dof) {
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outputObj.attr("hashAlgo", makeFileIngestionPrefix(dof.method) + printHashType(dof.hashType));
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},
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[&](DerivationOutputDeferred) {},
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}, output.output);
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}
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}
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{
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auto inputsList(drvObj.list("inputSrcs"));
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for (auto & input : drv.inputSrcs)
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inputsList.elem(store->printStorePath(input));
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}
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{
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auto inputDrvsObj(drvObj.object("inputDrvs"));
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for (auto & input : drv.inputDrvs) {
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auto inputList(inputDrvsObj.list(store->printStorePath(input.first)));
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for (auto & outputId : input.second)
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inputList.elem(outputId);
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}
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}
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drvObj.attr("platform", drv.platform);
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drvObj.attr("builder", drv.builder);
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{
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auto argsList(drvObj.list("args"));
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for (auto & arg : drv.args)
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argsList.elem(arg);
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}
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{
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auto envObj(drvObj.object("env"));
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for (auto & var : drv.env)
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envObj.attr(var.first, var.second);
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}
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}
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}
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std::cout << "\n";
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}
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};
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static auto rCmdShowDerivation = registerCommand<CmdShowDerivation>("show-derivation");
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