mirror of
https://github.com/privatevoid-net/nix-super.git
synced 2024-11-25 15:26:17 +02:00
Merge pull request #10038 from edolstra/tarball-git-cache
Use the Git cache for tarball flakes
This commit is contained in:
John Ericson
GitHub
commit
2080d89b87
13 changed files with 208 additions and 104 deletions
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@ -9,6 +9,7 @@
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#include "store-api.hh"
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#include "command.hh"
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#include "tarball.hh"
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#include "fetch-to-store.hh"
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namespace nix {
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@ -167,8 +168,9 @@ Bindings * MixEvalArgs::getAutoArgs(EvalState & state)
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SourcePath lookupFileArg(EvalState & state, std::string_view s, const Path * baseDir)
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{
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if (EvalSettings::isPseudoUrl(s)) {
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auto storePath = fetchers::downloadTarball(
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state.store, EvalSettings::resolvePseudoUrl(s), "source", false).storePath;
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auto accessor = fetchers::downloadTarball(
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EvalSettings::resolvePseudoUrl(s)).accessor;
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auto storePath = fetchToStore(*state.store, SourcePath(accessor), FetchMode::Copy);
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return state.rootPath(CanonPath(state.store->toRealPath(storePath)));
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}
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@ -2804,10 +2804,11 @@ std::optional<std::string> EvalState::resolveSearchPathPath(const SearchPath::Pa
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if (EvalSettings::isPseudoUrl(value)) {
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try {
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auto storePath = fetchers::downloadTarball(
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store, EvalSettings::resolvePseudoUrl(value), "source", false).storePath;
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auto accessor = fetchers::downloadTarball(
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EvalSettings::resolvePseudoUrl(value)).accessor;
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auto storePath = fetchToStore(*store, SourcePath(accessor), FetchMode::Copy);
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res = { store->toRealPath(storePath) };
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} catch (FileTransferError & e) {
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} catch (Error & e) {
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logWarning({
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.msg = HintFmt("Nix search path entry '%1%' cannot be downloaded, ignoring", value)
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});
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@ -9,6 +9,7 @@
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#include "tarball.hh"
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#include "url.hh"
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#include "value-to-json.hh"
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#include "fetch-to-store.hh"
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#include <ctime>
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#include <iomanip>
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@ -471,7 +472,7 @@ static void fetch(EvalState & state, const PosIdx pos, Value * * args, Value & v
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// https://github.com/NixOS/nix/issues/4313
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auto storePath =
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unpack
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? fetchers::downloadTarball(state.store, *url, name, (bool) expectedHash).storePath
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? fetchToStore(*state.store, fetchers::downloadTarball(*url).accessor, FetchMode::Copy, name)
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: fetchers::downloadFile(state.store, *url, name, (bool) expectedHash).storePath;
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if (expectedHash) {
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@ -467,6 +467,22 @@ struct GitRepoImpl : GitRepo, std::enable_shared_from_this<GitRepoImpl>
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else
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throw Error("Commit signature verification on commit %s failed: %s", rev.gitRev(), output);
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}
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Hash treeHashToNarHash(const Hash & treeHash) override
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{
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auto accessor = getAccessor(treeHash, false);
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fetchers::Attrs cacheKey({{"_what", "treeHashToNarHash"}, {"treeHash", treeHash.gitRev()}});
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if (auto res = fetchers::getCache()->lookup(cacheKey))
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return Hash::parseAny(fetchers::getStrAttr(*res, "narHash"), HashAlgorithm::SHA256);
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auto narHash = accessor->hashPath(CanonPath::root);
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fetchers::getCache()->upsert(cacheKey, fetchers::Attrs({{"narHash", narHash.to_string(HashFormat::SRI, true)}}));
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return narHash;
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}
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};
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ref<GitRepo> GitRepo::openRepo(const std::filesystem::path & path, bool create, bool bare)
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@ -93,6 +93,12 @@ struct GitRepo
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virtual void verifyCommit(
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const Hash & rev,
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const std::vector<fetchers::PublicKey> & publicKeys) = 0;
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/**
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* Given a Git tree hash, compute the hash of its NAR
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* serialisation. This is memoised on-disk.
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*/
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virtual Hash treeHashToNarHash(const Hash & treeHash) = 0;
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};
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ref<GitRepo> getTarballCache();
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@ -9,6 +9,9 @@
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#include "types.hh"
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#include "split.hh"
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#include "posix-source-accessor.hh"
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#include "fs-input-accessor.hh"
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#include "store-api.hh"
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#include "git-utils.hh"
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namespace nix::fetchers {
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@ -57,10 +60,8 @@ DownloadFileResult downloadFile(
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throw;
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}
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// FIXME: write to temporary file.
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Attrs infoAttrs({
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{"etag", res.etag},
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{"url", res.effectiveUri},
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});
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if (res.immutableUrl)
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@ -91,96 +92,102 @@ DownloadFileResult downloadFile(
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storePath = std::move(info.path);
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}
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/* Cache metadata for all URLs in the redirect chain. */
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for (auto & url : res.urls) {
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inAttrs.insert_or_assign("url", url);
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infoAttrs.insert_or_assign("url", *res.urls.rbegin());
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getCache()->add(
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*store,
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inAttrs,
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infoAttrs,
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*storePath,
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locked);
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if (url != res.effectiveUri)
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getCache()->add(
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*store,
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{
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{"type", "file"},
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{"url", res.effectiveUri},
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{"name", name},
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},
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infoAttrs,
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*storePath,
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locked);
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}
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return {
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.storePath = std::move(*storePath),
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.etag = res.etag,
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.effectiveUrl = res.effectiveUri,
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.effectiveUrl = *res.urls.rbegin(),
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.immutableUrl = res.immutableUrl,
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};
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}
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DownloadTarballResult downloadTarball(
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ref<Store> store,
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const std::string & url,
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const std::string & name,
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bool locked,
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const Headers & headers)
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{
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Attrs inAttrs({
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{"type", "tarball"},
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{"_what", "tarballCache"},
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{"url", url},
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{"name", name},
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});
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auto cached = getCache()->lookupExpired(*store, inAttrs);
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auto cached = getCache()->lookupExpired(inAttrs);
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auto attrsToResult = [&](const Attrs & infoAttrs)
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{
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auto treeHash = getRevAttr(infoAttrs, "treeHash");
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return DownloadTarballResult {
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.treeHash = treeHash,
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.lastModified = (time_t) getIntAttr(infoAttrs, "lastModified"),
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.immutableUrl = maybeGetStrAttr(infoAttrs, "immutableUrl"),
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.accessor = getTarballCache()->getAccessor(treeHash, false),
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};
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};
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if (cached && !getTarballCache()->hasObject(getRevAttr(cached->infoAttrs, "treeHash")))
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cached.reset();
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if (cached && !cached->expired)
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return {
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.storePath = std::move(cached->storePath),
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.lastModified = (time_t) getIntAttr(cached->infoAttrs, "lastModified"),
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.immutableUrl = maybeGetStrAttr(cached->infoAttrs, "immutableUrl"),
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};
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/* We previously downloaded this tarball and it's younger than
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`tarballTtl`, so no need to check the server. */
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return attrsToResult(cached->infoAttrs);
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auto res = downloadFile(store, url, name, locked, headers);
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auto _res = std::make_shared<Sync<FileTransferResult>>();
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std::optional<StorePath> unpackedStorePath;
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time_t lastModified;
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if (cached && res.etag != "" && getStrAttr(cached->infoAttrs, "etag") == res.etag) {
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unpackedStorePath = std::move(cached->storePath);
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lastModified = getIntAttr(cached->infoAttrs, "lastModified");
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} else {
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Path tmpDir = createTempDir();
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AutoDelete autoDelete(tmpDir, true);
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unpackTarfile(store->toRealPath(res.storePath), tmpDir);
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auto members = readDirectory(tmpDir);
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if (members.size() != 1)
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throw nix::Error("tarball '%s' contains an unexpected number of top-level files", url);
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auto topDir = tmpDir + "/" + members.begin()->name;
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lastModified = lstat(topDir).st_mtime;
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PosixSourceAccessor accessor;
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unpackedStorePath = store->addToStore(name, accessor, CanonPath { topDir }, FileIngestionMethod::Recursive, HashAlgorithm::SHA256, {}, defaultPathFilter, NoRepair);
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}
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Attrs infoAttrs({
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{"lastModified", uint64_t(lastModified)},
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{"etag", res.etag},
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auto source = sinkToSource([&](Sink & sink) {
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FileTransferRequest req(url);
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req.expectedETag = cached ? getStrAttr(cached->infoAttrs, "etag") : "";
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getFileTransfer()->download(std::move(req), sink,
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[_res](FileTransferResult r)
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{
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*_res->lock() = r;
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});
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});
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if (res.immutableUrl)
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infoAttrs.emplace("immutableUrl", *res.immutableUrl);
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// TODO: fall back to cached value if download fails.
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getCache()->add(
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*store,
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inAttrs,
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infoAttrs,
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*unpackedStorePath,
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locked);
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/* Note: if the download is cached, `importTarball()` will receive
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no data, which causes it to import an empty tarball. */
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TarArchive archive { *source };
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auto parseSink = getTarballCache()->getFileSystemObjectSink();
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auto lastModified = unpackTarfileToSink(archive, *parseSink);
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return {
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.storePath = std::move(*unpackedStorePath),
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.lastModified = lastModified,
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.immutableUrl = res.immutableUrl,
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};
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auto res(_res->lock());
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Attrs infoAttrs;
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if (res->cached) {
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/* The server says that the previously downloaded version is
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still current. */
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infoAttrs = cached->infoAttrs;
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} else {
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infoAttrs.insert_or_assign("etag", res->etag);
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infoAttrs.insert_or_assign("treeHash", parseSink->sync().gitRev());
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infoAttrs.insert_or_assign("lastModified", uint64_t(lastModified));
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if (res->immutableUrl)
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infoAttrs.insert_or_assign("immutableUrl", *res->immutableUrl);
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}
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/* Insert a cache entry for every URL in the redirect chain. */
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for (auto & url : res->urls) {
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inAttrs.insert_or_assign("url", url);
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getCache()->upsert(inAttrs, infoAttrs);
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}
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// FIXME: add a cache entry for immutableUrl? That could allow
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// cache poisoning.
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return attrsToResult(infoAttrs);
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}
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// An input scheme corresponding to a curl-downloadable resource.
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@ -198,6 +205,8 @@ struct CurlInputScheme : InputScheme
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virtual bool isValidURL(const ParsedURL & url, bool requireTree) const = 0;
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static const std::set<std::string> specialParams;
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std::optional<Input> inputFromURL(const ParsedURL & _url, bool requireTree) const override
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{
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if (!isValidURL(_url, requireTree))
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@ -220,8 +229,17 @@ struct CurlInputScheme : InputScheme
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if (auto n = string2Int<uint64_t>(*i))
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input.attrs.insert_or_assign("revCount", *n);
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url.query.erase("rev");
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url.query.erase("revCount");
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if (auto i = get(url.query, "lastModified"))
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if (auto n = string2Int<uint64_t>(*i))
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input.attrs.insert_or_assign("lastModified", *n);
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/* The URL query parameters serve two roles: specifying fetch
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settings for Nix itself, and arbitrary data as part of the
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HTTP request. Now that we've processed the Nix-specific
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attributes above, remove them so we don't also send them as
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part of the HTTP request. */
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for (auto & param : allowedAttrs())
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url.query.erase(param);
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input.attrs.insert_or_assign("type", std::string { schemeName() });
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input.attrs.insert_or_assign("url", url.to_string());
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@ -280,10 +298,24 @@ struct FileInputScheme : CurlInputScheme
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: (!requireTree && !hasTarballExtension(url.path)));
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}
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std::pair<StorePath, Input> fetch(ref<Store> store, const Input & input) override
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std::pair<ref<InputAccessor>, Input> getAccessor(ref<Store> store, const Input & _input) const override
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{
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auto input(_input);
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/* Unlike TarballInputScheme, this stores downloaded files in
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the Nix store directly, since there is little deduplication
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benefit in using the Git cache for single big files like
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tarballs. */
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auto file = downloadFile(store, getStrAttr(input.attrs, "url"), input.getName(), false);
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return {std::move(file.storePath), input};
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auto narHash = store->queryPathInfo(file.storePath)->narHash;
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input.attrs.insert_or_assign("narHash", narHash.to_string(HashFormat::SRI, true));
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auto accessor = makeStorePathAccessor(store, file.storePath);
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accessor->setPathDisplay("«" + input.to_string() + "»");
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return {accessor, input};
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}
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};
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@ -301,11 +333,13 @@ struct TarballInputScheme : CurlInputScheme
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: (requireTree || hasTarballExtension(url.path)));
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}
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std::pair<StorePath, Input> fetch(ref<Store> store, const Input & _input) override
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std::pair<ref<InputAccessor>, Input> getAccessor(ref<Store> store, const Input & _input) const override
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{
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Input input(_input);
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auto url = getStrAttr(input.attrs, "url");
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auto result = downloadTarball(store, url, input.getName(), false);
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auto input(_input);
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auto result = downloadTarball(getStrAttr(input.attrs, "url"), {});
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result.accessor->setPathDisplay("«" + input.to_string() + "»");
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if (result.immutableUrl) {
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auto immutableInput = Input::fromURL(*result.immutableUrl);
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@ -319,7 +353,10 @@ struct TarballInputScheme : CurlInputScheme
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if (result.lastModified && !input.attrs.contains("lastModified"))
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input.attrs.insert_or_assign("lastModified", uint64_t(result.lastModified));
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return {result.storePath, std::move(input)};
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input.attrs.insert_or_assign("narHash",
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getTarballCache()->treeHashToNarHash(result.treeHash).to_string(HashFormat::SRI, true));
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return {result.accessor, input};
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}
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};
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|
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@ -2,11 +2,13 @@
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#include "types.hh"
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#include "path.hh"
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#include "hash.hh"
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|
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#include <optional>
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|
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namespace nix {
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class Store;
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struct InputAccessor;
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}
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namespace nix::fetchers {
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@ -28,16 +30,18 @@ DownloadFileResult downloadFile(
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|
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struct DownloadTarballResult
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{
|
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StorePath storePath;
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Hash treeHash;
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time_t lastModified;
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std::optional<std::string> immutableUrl;
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ref<InputAccessor> accessor;
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};
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/**
|
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* Download and import a tarball into the Git cache. The result is the
|
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* Git tree hash of the root directory.
|
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*/
|
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DownloadTarballResult downloadTarball(
|
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ref<Store> store,
|
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const std::string & url,
|
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const std::string & name,
|
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bool locked,
|
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const Headers & headers = {});
|
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|
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}
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|
|
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|||
|
|
@ -106,6 +106,8 @@ struct curlFileTransfer : public FileTransfer
|
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this->result.data.append(data);
|
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})
|
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{
|
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result.urls.push_back(request.uri);
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|
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requestHeaders = curl_slist_append(requestHeaders, "Accept-Encoding: zstd, br, gzip, deflate, bzip2, xz");
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if (!request.expectedETag.empty())
|
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requestHeaders = curl_slist_append(requestHeaders, ("If-None-Match: " + request.expectedETag).c_str());
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|
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@ -182,6 +184,14 @@ struct curlFileTransfer : public FileTransfer
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return ((TransferItem *) userp)->writeCallback(contents, size, nmemb);
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}
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|
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void appendCurrentUrl()
|
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{
|
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char * effectiveUriCStr = nullptr;
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curl_easy_getinfo(req, CURLINFO_EFFECTIVE_URL, &effectiveUriCStr);
|
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if (effectiveUriCStr && *result.urls.rbegin() != effectiveUriCStr)
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result.urls.push_back(effectiveUriCStr);
|
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}
|
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|
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size_t headerCallback(void * contents, size_t size, size_t nmemb)
|
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{
|
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size_t realSize = size * nmemb;
|
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|
|
@ -196,6 +206,7 @@ struct curlFileTransfer : public FileTransfer
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statusMsg = trim(match.str(1));
|
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acceptRanges = false;
|
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encoding = "";
|
||||
appendCurrentUrl();
|
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} else {
|
||||
|
||||
auto i = line.find(':');
|
||||
|
|
@ -360,14 +371,11 @@ struct curlFileTransfer : public FileTransfer
|
|||
{
|
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auto httpStatus = getHTTPStatus();
|
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|
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char * effectiveUriCStr = nullptr;
|
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curl_easy_getinfo(req, CURLINFO_EFFECTIVE_URL, &effectiveUriCStr);
|
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if (effectiveUriCStr)
|
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result.effectiveUri = effectiveUriCStr;
|
||||
|
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debug("finished %s of '%s'; curl status = %d, HTTP status = %d, body = %d bytes",
|
||||
request.verb(), request.uri, code, httpStatus, result.bodySize);
|
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|
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appendCurrentUrl();
|
||||
|
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if (decompressionSink) {
|
||||
try {
|
||||
decompressionSink->finish();
|
||||
|
|
@ -779,7 +787,10 @@ FileTransferResult FileTransfer::upload(const FileTransferRequest & request)
|
|||
return enqueueFileTransfer(request).get();
|
||||
}
|
||||
|
||||
void FileTransfer::download(FileTransferRequest && request, Sink & sink)
|
||||
void FileTransfer::download(
|
||||
FileTransferRequest && request,
|
||||
Sink & sink,
|
||||
std::function<void(FileTransferResult)> resultCallback)
|
||||
{
|
||||
/* Note: we can't call 'sink' via request.dataCallback, because
|
||||
that would cause the sink to execute on the fileTransfer
|
||||
|
|
@ -829,11 +840,13 @@ void FileTransfer::download(FileTransferRequest && request, Sink & sink)
|
|||
};
|
||||
|
||||
enqueueFileTransfer(request,
|
||||
{[_state](std::future<FileTransferResult> fut) {
|
||||
{[_state, resultCallback{std::move(resultCallback)}](std::future<FileTransferResult> fut) {
|
||||
auto state(_state->lock());
|
||||
state->quit = true;
|
||||
try {
|
||||
fut.get();
|
||||
auto res = fut.get();
|
||||
if (resultCallback)
|
||||
resultCallback(std::move(res));
|
||||
} catch (...) {
|
||||
state->exc = std::current_exception();
|
||||
}
|
||||
|
|
|
|||
|
|
@ -75,14 +75,34 @@ struct FileTransferRequest
|
|||
|
||||
struct FileTransferResult
|
||||
{
|
||||
/**
|
||||
* Whether this is a cache hit (i.e. the ETag supplied in the
|
||||
* request is still valid). If so, `data` is empty.
|
||||
*/
|
||||
bool cached = false;
|
||||
|
||||
/**
|
||||
* The ETag of the object.
|
||||
*/
|
||||
std::string etag;
|
||||
std::string effectiveUri;
|
||||
|
||||
/**
|
||||
* All URLs visited in the redirect chain.
|
||||
*/
|
||||
std::vector<std::string> urls;
|
||||
|
||||
/**
|
||||
* The response body.
|
||||
*/
|
||||
std::string data;
|
||||
|
||||
uint64_t bodySize = 0;
|
||||
/* An "immutable" URL for this resource (i.e. one whose contents
|
||||
will never change), as returned by the `Link: <url>;
|
||||
rel="immutable"` header. */
|
||||
|
||||
/**
|
||||
* An "immutable" URL for this resource (i.e. one whose contents
|
||||
* will never change), as returned by the `Link: <url>;
|
||||
* rel="immutable"` header.
|
||||
*/
|
||||
std::optional<std::string> immutableUrl;
|
||||
};
|
||||
|
||||
|
|
@ -116,7 +136,10 @@ struct FileTransfer
|
|||
* Download a file, writing its data to a sink. The sink will be
|
||||
* invoked on the thread of the caller.
|
||||
*/
|
||||
void download(FileTransferRequest && request, Sink & sink);
|
||||
void download(
|
||||
FileTransferRequest && request,
|
||||
Sink & sink,
|
||||
std::function<void(FileTransferResult)> resultCallback = {});
|
||||
|
||||
enum Error { NotFound, Forbidden, Misc, Transient, Interrupted };
|
||||
};
|
||||
|
|
|
|||
|
|
@ -30,6 +30,11 @@ std::filesystem::path PosixSourceAccessor::makeAbsPath(const CanonPath & path)
|
|||
{
|
||||
return root.empty()
|
||||
? (std::filesystem::path { path.abs() })
|
||||
: path.isRoot()
|
||||
? /* Don't append a slash for the root of the accessor, since
|
||||
it can be a non-directory (e.g. in the case of `fetchTree
|
||||
{ type = "file" }`). */
|
||||
root
|
||||
: root / path.rel();
|
||||
}
|
||||
|
||||
|
|
|
|||
Binary file not shown.
|
|
@ -14,6 +14,7 @@ test_fetch_file () {
|
|||
tree = builtins.fetchTree { type = "file"; url = "file://$PWD/test_input"; };
|
||||
in
|
||||
assert (tree.narHash == "$input_hash");
|
||||
assert builtins.readFile tree == "foo\n";
|
||||
tree
|
||||
EOF
|
||||
}
|
||||
|
|
|
|||
|
|
@ -42,11 +42,11 @@ test_tarball() {
|
|||
nix-instantiate --strict --eval -E "!((import (fetchTree { type = \"tarball\"; url = file://$tarball; narHash = \"$hash\"; })) ? submodules)" >&2
|
||||
nix-instantiate --strict --eval -E "!((import (fetchTree { type = \"tarball\"; url = file://$tarball; narHash = \"$hash\"; })) ? submodules)" 2>&1 | grep 'true'
|
||||
|
||||
nix-instantiate --eval -E '1 + 2' -I fnord=file://no-such-tarball.tar$ext
|
||||
nix-instantiate --eval -E 'with <fnord/xyzzy>; 1 + 2' -I fnord=file://no-such-tarball$ext
|
||||
(! nix-instantiate --eval -E '<fnord/xyzzy> 1' -I fnord=file://no-such-tarball$ext)
|
||||
nix-instantiate --eval -E '1 + 2' -I fnord=file:///no-such-tarball.tar$ext
|
||||
nix-instantiate --eval -E 'with <fnord/xyzzy>; 1 + 2' -I fnord=file:///no-such-tarball$ext
|
||||
(! nix-instantiate --eval -E '<fnord/xyzzy> 1' -I fnord=file:///no-such-tarball$ext)
|
||||
|
||||
nix-instantiate --eval -E '<fnord/config.nix>' -I fnord=file://no-such-tarball$ext -I fnord=.
|
||||
nix-instantiate --eval -E '<fnord/config.nix>' -I fnord=file:///no-such-tarball$ext -I fnord=.
|
||||
|
||||
# Ensure that the `name` attribute isn’t accepted as that would mess
|
||||
# with the content-addressing
|
||||
|
|
@ -57,8 +57,3 @@ test_tarball() {
|
|||
test_tarball '' cat
|
||||
test_tarball .xz xz
|
||||
test_tarball .gz gzip
|
||||
|
||||
rm -rf $TEST_ROOT/tmp
|
||||
mkdir -p $TEST_ROOT/tmp
|
||||
(! TMPDIR=$TEST_ROOT/tmp XDG_RUNTIME_DIR=$TEST_ROOT/tmp nix-env -f file://$(pwd)/bad.tar.xz -qa --out-path)
|
||||
(! [ -e $TEST_ROOT/tmp/bad ])
|
||||
|
|
|
|||
Loading…
Reference in a new issue