129 lines
4.2 KiB
C++
129 lines
4.2 KiB
C++
#include "command.hh"
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#include "shared.hh"
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#include "store-api.hh"
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#include "json.hh"
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#include "common-args.hh"
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#include <algorithm>
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#include <array>
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using namespace nix;
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struct CmdPathInfo : StorePathsCommand, MixJSON
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{
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bool showSize = false;
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bool showClosureSize = false;
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bool humanReadable = false;
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bool showSigs = false;
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CmdPathInfo()
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{
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mkFlag('s', "size", "print size of the NAR dump of each path", &showSize);
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mkFlag('S', "closure-size", "print sum size of the NAR dumps of the closure of each path", &showClosureSize);
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mkFlag('h', "human-readable", "with -s and -S, print sizes like 1K 234M 5.67G etc.", &humanReadable);
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mkFlag(0, "sigs", "show signatures", &showSigs);
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}
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std::string description() override
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{
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return "query information about store paths";
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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 closure sizes of every path in the current NixOS system closure, sorted by size:",
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"nix path-info -rS /run/current-system | sort -nk2"
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},
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Example{
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"To show a package's closure size and all its dependencies with human readable sizes:",
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"nix path-info -rsSh nixpkgs.rust"
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},
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Example{
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"To check the existence of a path in a binary cache:",
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"nix path-info -r /nix/store/7qvk5c91...-geeqie-1.1 --store https://cache.nixos.org/"
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},
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Example{
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"To print the 10 most recently added paths (using --json and the jq(1) command):",
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"nix path-info --json --all | jq -r 'sort_by(.registrationTime)[-11:-1][].path'"
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},
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Example{
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"To show the size of the entire Nix store:",
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"nix path-info --json --all | jq 'map(.narSize) | add'"
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},
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Example{
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"To show every path whose closure is bigger than 1 GB, sorted by closure size:",
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"nix path-info --json --all -S | jq 'map(select(.closureSize > 1e9)) | sort_by(.closureSize) | map([.path, .closureSize])'"
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},
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};
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}
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void printSize(unsigned long long value)
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{
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if (!humanReadable) {
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std::cout << fmt("\t%11d", value);
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return;
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}
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static const std::array<char, 9> idents{{
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' ', 'K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y'
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}};
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size_t power = 0;
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double res = value;
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while (res > 1024 && power < idents.size()) {
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++power;
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res /= 1024;
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}
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std::cout << fmt("\t%6.1f%c", res, idents.at(power));
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}
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void run(ref<Store> store, StorePaths storePaths) override
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{
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size_t pathLen = 0;
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for (auto & storePath : storePaths)
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pathLen = std::max(pathLen, store->printStorePath(storePath).size());
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if (json) {
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JSONPlaceholder jsonRoot(std::cout);
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store->pathInfoToJSON(jsonRoot,
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// FIXME: preserve order?
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storePathsToSet(storePaths),
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true, showClosureSize, AllowInvalid);
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}
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else {
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for (auto & storePath : storePaths) {
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auto info = store->queryPathInfo(storePath);
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auto storePathS = store->printStorePath(storePath);
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std::cout << storePathS;
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if (showSize || showClosureSize || showSigs)
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std::cout << std::string(std::max(0, (int) pathLen - (int) storePathS.size()), ' ');
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if (showSize)
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printSize(info->narSize);
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if (showClosureSize)
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printSize(store->getClosureSize(info->path).first);
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if (showSigs) {
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std::cout << '\t';
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Strings ss;
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if (info->ultimate) ss.push_back("ultimate");
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if (info->ca != "") ss.push_back("ca:" + info->ca);
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for (auto & sig : info->sigs) ss.push_back(sig);
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std::cout << concatStringsSep(" ", ss);
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}
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std::cout << std::endl;
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}
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}
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}
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};
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static auto r1 = registerCommand<CmdPathInfo>("path-info");
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