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Add human readable closure sizes to nix path-info

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Unfortunately, -h is already taken as a short option by --help, so we have to
use a different letter or the capitalized version.

Resolves #2363
This commit is contained in:
Benjamin Hipple 2018-08-25 18:35:15 -04:00 committed by Eelco Dolstra
parent 5e83b0227f
commit 3407a5d936
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GPG key ID: 8170B4726D7198DE
1 changed files with 27 additions and 2 deletions
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29
src/nix/path-info.cc
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@ -13,12 +13,14 @@ 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);
}
@ -39,6 +41,10 @@ struct CmdPathInfo : StorePathsCommand, MixJSON
"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/"
@ -58,6 +64,25 @@ struct CmdPathInfo : StorePathsCommand, MixJSON
};
}
void printSize(int value)
{
if (!humanReadable) {
std::cout << '\t' << std::setw(11) << value;
return;
}
static constexpr std::array<char, 6> idents = {
' ', 'K', 'M', 'G', 'T', 'P'
};
size_t power = 0;
double res = value;
while (res > 1024) {
++power;
res /= 1024;
}
std::cout << '\t' << std::setw(11) << std::setprecision(3) << res << idents[power];
}
void run(ref<Store> store, Paths storePaths) override
{
size_t pathLen = 0;
@ -81,10 +106,10 @@ struct CmdPathInfo : StorePathsCommand, MixJSON
std::cout << storePath << std::string(std::max(0, (int) pathLen - (int) storePath.size()), ' ');
if (showSize)
std::cout << '\t' << std::setw(11) << info->narSize;
printSize(info->narSize);
if (showClosureSize)
std::cout << '\t' << std::setw(11) << store->getClosureSize(storePath).first;
printSize(store->getClosureSize(storePath).first);
if (showSigs) {
std::cout << '\t';