115 lines
3.1 KiB
C++
115 lines
3.1 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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mkFlag()
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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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.set(&recursive, true);
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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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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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PathSet closure;
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store->computeFSClosure(drvPaths, closure);
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drvPaths = 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 (!isDerivation(drvPath)) continue;
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auto drvObj(jsonRoot.object(drvPath));
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auto drv = readDerivation(drvPath);
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{
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auto outputsObj(drvObj.object("outputs"));
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for (auto & output : drv.outputs) {
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auto outputObj(outputsObj.object(output.first));
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outputObj.attr("path", output.second.path);
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if (output.second.hash != "") {
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outputObj.attr("hashAlgo", output.second.hashAlgo);
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outputObj.attr("hash", output.second.hash);
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}
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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(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(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 r1 = registerCommand<CmdShowDerivation>("show-derivation");
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