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