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nix path-info: Show download sizes for binary cache stores

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E.g.

  $ nix path-info --json --store https://cache.nixos.org nixpkgs.thunderbird -S
  ...
      "downloadHash": "sha256:1jlixpzi225wwa0f4xdrwrqgi47ip1qpj9p06fyxxg07sfmyi4q0",
      "downloadSize": 43047620,
      "closureDownloadSize": 84745960
    }
  ]
This commit is contained in:
Eelco Dolstra 2017-07-14 17:36:49 +02:00
parent fdc9da034f
commit 766ad5db3b
No known key found for this signature in database
GPG key ID: 8170B4726D7198DE
3 changed files with 30 additions and 9 deletions
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35
src/libstore/store-api.cc
View file

@ -480,8 +480,12 @@ void Store::pathInfoToJSON(JSONPlaceholder & jsonOut, const PathSet & storePaths
if (info->ca != "")
jsonPath.attr("ca", info->ca);
if (showClosureSize)
jsonPath.attr("closureSize", getClosureSize(storePath));
std::pair<uint64_t, uint64_t> closureSizes;
if (showClosureSize) {
closureSizes = getClosureSize(storePath);
jsonPath.attr("closureSize", closureSizes.first);
}
if (includeImpureInfo) {
@ -500,6 +504,17 @@ void Store::pathInfoToJSON(JSONPlaceholder & jsonOut, const PathSet & storePaths
jsonSigs.elem(sig);
}
auto narInfo = std::dynamic_pointer_cast<const NarInfo>(
std::shared_ptr<const ValidPathInfo>(info));
if (narInfo) {
if (narInfo->fileHash)
jsonPath.attr("downloadHash", narInfo->fileHash.to_string());
if (narInfo->fileSize)
jsonPath.attr("downloadSize", narInfo->fileSize);
if (showClosureSize)
jsonPath.attr("closureDownloadSize", closureSizes.second);
}
}
} catch (InvalidPath &) {
@ -509,14 +524,20 @@ void Store::pathInfoToJSON(JSONPlaceholder & jsonOut, const PathSet & storePaths
}
unsigned long long Store::getClosureSize(const Path & storePath)
std::pair<uint64_t, uint64_t> Store::getClosureSize(const Path & storePath)
{
unsigned long long totalSize = 0;
uint64_t totalNarSize = 0, totalDownloadSize = 0;
PathSet closure;
computeFSClosure(storePath, closure, false, false);
for (auto & p : closure)
totalSize += queryPathInfo(p)->narSize;
return totalSize;
for (auto & p : closure) {
auto info = queryPathInfo(p);
totalNarSize += info->narSize;
auto narInfo = std::dynamic_pointer_cast<const NarInfo>(
std::shared_ptr<const ValidPathInfo>(info));
if (narInfo)
totalDownloadSize += narInfo->fileSize;
}
return {totalNarSize, totalDownloadSize};
}

2
src/libstore/store-api.hh
View file

@ -495,7 +495,7 @@ public:
/* Return the size of the closure of the specified path, that is,
the sum of the size of the NAR serialisation of each path in
the closure. */
unsigned long long getClosureSize(const Path & storePath);
std::pair<uint64_t, uint64_t> getClosureSize(const Path & storePath);
/* Optimise the disk space usage of the Nix store by hard-linking files
with the same contents. */

2
src/nix/path-info.cc
View file

@ -84,7 +84,7 @@ struct CmdPathInfo : StorePathsCommand, MixJSON
std::cout << '\t' << std::setw(11) << info->narSize;
if (showClosureSize)
std::cout << '\t' << std::setw(11) << store->getClosureSize(storePath);
std::cout << '\t' << std::setw(11) << store->getClosureSize(storePath).first;
if (showSigs) {
std::cout << '\t';