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Remove fetchers::Tree and move tarball-related stuff into its own header

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This commit is contained in:
Eelco Dolstra 2023-10-20 19:50:21 +02:00
parent 091e5b4513
commit 935c9981de
16 changed files with 111 additions and 103 deletions
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5
src/libcmd/common-eval-args.cc
View file

@ -9,6 +9,7 @@
#include "flake/flakeref.hh"
#include "store-api.hh"
#include "command.hh"
#include "tarball.hh"
namespace nix {
@ -168,14 +169,14 @@ SourcePath lookupFileArg(EvalState & state, std::string_view s)
{
if (EvalSettings::isPseudoUrl(s)) {
auto storePath = fetchers::downloadTarball(
state.store, EvalSettings::resolvePseudoUrl(s), "source", false).tree.storePath;
state.store, EvalSettings::resolvePseudoUrl(s), "source", false).storePath;
return state.rootPath(CanonPath(state.store->toRealPath(storePath)));
}
else if (hasPrefix(s, "flake:")) {
experimentalFeatureSettings.require(Xp::Flakes);
auto flakeRef = parseFlakeRef(std::string(s.substr(6)), {}, true, false);
auto storePath = flakeRef.resolve(state.store).fetchTree(state.store).first.storePath;
auto storePath = flakeRef.resolve(state.store).fetchTree(state.store).first;
return state.rootPath(CanonPath(state.store->toRealPath(storePath)));
}

34
src/libexpr/flake/flake.cc
View file

@ -15,7 +15,7 @@ using namespace flake;
namespace flake {
typedef std::pair<fetchers::Tree, FlakeRef> FetchedFlake;
typedef std::pair<StorePath, FlakeRef> FetchedFlake;
typedef std::vector<std::pair<FlakeRef, FetchedFlake>> FlakeCache;
static std::optional<FetchedFlake> lookupInFlakeCache(
@ -34,7 +34,7 @@ static std::optional<FetchedFlake> lookupInFlakeCache(
return std::nullopt;
}
static std::tuple<fetchers::Tree, FlakeRef, FlakeRef> fetchOrSubstituteTree(
static std::tuple<StorePath, FlakeRef, FlakeRef> fetchOrSubstituteTree(
EvalState & state,
const FlakeRef & originalRef,
bool allowLookup,
@ -61,16 +61,16 @@ static std::tuple<fetchers::Tree, FlakeRef, FlakeRef> fetchOrSubstituteTree(
flakeCache.push_back({originalRef, *fetched});
}
auto [tree, lockedRef] = *fetched;
auto [storePath, lockedRef] = *fetched;
debug("got tree '%s' from '%s'",
state.store->printStorePath(tree.storePath), lockedRef);
state.store->printStorePath(storePath), lockedRef);
state.allowPath(tree.storePath);
state.allowPath(storePath);
assert(!originalRef.input.getNarHash() || tree.storePath == originalRef.input.computeStorePath(*state.store));
assert(!originalRef.input.getNarHash() || storePath == originalRef.input.computeStorePath(*state.store));
return {std::move(tree), resolvedRef, lockedRef};
return {std::move(storePath), resolvedRef, lockedRef};
}
static void forceTrivialValue(EvalState & state, Value & value, const PosIdx pos)
@ -202,21 +202,21 @@ static Flake getFlake(
FlakeCache & flakeCache,
InputPath lockRootPath)
{
auto [sourceInfo, resolvedRef, lockedRef] = fetchOrSubstituteTree(
auto [storePath, resolvedRef, lockedRef] = fetchOrSubstituteTree(
state, originalRef, allowLookup, flakeCache);
// Guard against symlink attacks.
auto flakeDir = canonPath(sourceInfo.actualPath + "/" + lockedRef.subdir, true);
auto flakeDir = canonPath(state.store->toRealPath(storePath) + "/" + lockedRef.subdir, true);
auto flakeFile = canonPath(flakeDir + "/flake.nix", true);
if (!isInDir(flakeFile, sourceInfo.actualPath))
if (!isInDir(flakeFile, state.store->toRealPath(storePath)))
throw Error("'flake.nix' file of flake '%s' escapes from '%s'",
lockedRef, state.store->printStorePath(sourceInfo.storePath));
lockedRef, state.store->printStorePath(storePath));
Flake flake {
.originalRef = originalRef,
.resolvedRef = resolvedRef,
.lockedRef = lockedRef,
.sourceInfo = std::make_shared<fetchers::Tree>(std::move(sourceInfo))
.storePath = storePath,
};
if (!pathExists(flakeFile))
@ -346,7 +346,7 @@ LockedFlake lockFlake(
// FIXME: symlink attack
auto oldLockFile = LockFile::read(
lockFlags.referenceLockFilePath.value_or(
flake.sourceInfo->actualPath + "/" + flake.lockedRef.subdir + "/flake.lock"));
state.store->toRealPath(flake.storePath) + "/" + flake.lockedRef.subdir + "/flake.lock"));
debug("old lock file: %s", oldLockFile);
@ -574,7 +574,7 @@ LockedFlake lockFlake(
oldLock
? std::dynamic_pointer_cast<const Node>(oldLock)
: LockFile::read(
inputFlake.sourceInfo->actualPath + "/" + inputFlake.lockedRef.subdir + "/flake.lock").root.get_ptr(),
state.store->toRealPath(inputFlake.storePath) + "/" + inputFlake.lockedRef.subdir + "/flake.lock").root.get_ptr(),
oldLock ? lockRootPath : inputPath,
localPath,
false);
@ -598,7 +598,7 @@ LockedFlake lockFlake(
};
// Bring in the current ref for relative path resolution if we have it
auto parentPath = canonPath(flake.sourceInfo->actualPath + "/" + flake.lockedRef.subdir, true);
auto parentPath = canonPath(state.store->toRealPath(flake.storePath) + "/" + flake.lockedRef.subdir, true);
computeLocks(
flake.inputs,
@ -729,7 +729,7 @@ void callFlake(EvalState & state,
emitTreeAttrs(
state,
*lockedFlake.flake.sourceInfo,
lockedFlake.flake.storePath,
lockedFlake.flake.lockedRef.input,
*vRootSrc,
false,
@ -893,7 +893,7 @@ Fingerprint LockedFlake::getFingerprint() const
// flake.sourceInfo.storePath for the fingerprint.
return hashString(htSHA256,
fmt("%s;%s;%d;%d;%s",
flake.sourceInfo->storePath.to_string(),
flake.storePath.to_string(),
flake.lockedRef.subdir,
flake.lockedRef.input.getRevCount().value_or(0),
flake.lockedRef.input.getLastModified().value_or(0),

6
src/libexpr/flake/flake.hh
View file

@ -10,8 +10,6 @@ namespace nix {
class EvalState;
namespace fetchers { struct Tree; }
namespace flake {
struct FlakeInput;
@ -84,7 +82,7 @@ struct Flake
*/
bool forceDirty = false;
std::optional<std::string> description;
std::shared_ptr<const fetchers::Tree> sourceInfo;
StorePath storePath;
FlakeInputs inputs;
/**
* 'nixConfig' attribute
@ -193,7 +191,7 @@ void callFlake(
void emitTreeAttrs(
EvalState & state,
const fetchers::Tree & tree,
const StorePath & storePath,
const fetchers::Input & input,
Value & v,
bool emptyRevFallback = false,

6
src/libexpr/flake/flakeref.cc
View file

@ -272,10 +272,10 @@ FlakeRef FlakeRef::fromAttrs(const fetchers::Attrs & attrs)
fetchers::maybeGetStrAttr(attrs, "dir").value_or(""));
}
std::pair<fetchers::Tree, FlakeRef> FlakeRef::fetchTree(ref<Store> store) const
std::pair<StorePath, FlakeRef> FlakeRef::fetchTree(ref<Store> store) const
{
auto [tree, lockedInput] = input.fetch(store);
return {std::move(tree), FlakeRef(std::move(lockedInput), subdir)};
auto [storePath, lockedInput] = input.fetch(store);
return {std::move(storePath), FlakeRef(std::move(lockedInput), subdir)};
}
std::tuple<FlakeRef, std::string, ExtendedOutputsSpec> parseFlakeRefWithFragmentAndExtendedOutputsSpec(

2
src/libexpr/flake/flakeref.hh
View file

@ -63,7 +63,7 @@ struct FlakeRef
static FlakeRef fromAttrs(const fetchers::Attrs & attrs);
std::pair<fetchers::Tree, FlakeRef> fetchTree(ref<Store> store) const;
std::pair<StorePath, FlakeRef> fetchTree(ref<Store> store) const;
};
std::ostream & operator << (std::ostream & str, const FlakeRef & flakeRef);

6
src/libexpr/parser.y
View file

@ -646,7 +646,7 @@ formal
#include "eval.hh"
#include "filetransfer.hh"
#include "fetchers.hh"
#include "tarball.hh"
#include "store-api.hh"
#include "flake/flake.hh"
@ -783,7 +783,7 @@ std::optional<std::string> EvalState::resolveSearchPathPath(const SearchPath::Pa
if (EvalSettings::isPseudoUrl(value)) {
try {
auto storePath = fetchers::downloadTarball(
store, EvalSettings::resolvePseudoUrl(value), "source", false).tree.storePath;
store, EvalSettings::resolvePseudoUrl(value), "source", false).storePath;
res = { store->toRealPath(storePath) };
} catch (FileTransferError & e) {
logWarning({
@ -797,7 +797,7 @@ std::optional<std::string> EvalState::resolveSearchPathPath(const SearchPath::Pa
experimentalFeatureSettings.require(Xp::Flakes);
auto flakeRef = parseFlakeRef(value.substr(6), {}, true, false);
debug("fetching flake search path element '%s''", value);
auto storePath = flakeRef.resolve(store).fetchTree(store).first.storePath;
auto storePath = flakeRef.resolve(store).fetchTree(store).first;
res = { store->toRealPath(storePath) };
}

6
src/libexpr/primops/fetchMercurial.cc
View file

@ -71,10 +71,10 @@ static void prim_fetchMercurial(EvalState & state, const PosIdx pos, Value * * a
auto input = fetchers::Input::fromAttrs(std::move(attrs));
// FIXME: use name
auto [tree, input2] = input.fetch(state.store);
auto [storePath, input2] = input.fetch(state.store);
auto attrs2 = state.buildBindings(8);
state.mkStorePathString(tree.storePath, attrs2.alloc(state.sOutPath));
state.mkStorePathString(storePath, attrs2.alloc(state.sOutPath));
if (input2.getRef())
attrs2.alloc("branch").mkString(*input2.getRef());
// Backward compatibility: set 'rev' to
@ -86,7 +86,7 @@ static void prim_fetchMercurial(EvalState & state, const PosIdx pos, Value * * a
attrs2.alloc("revCount").mkInt(*revCount);
v.mkAttrs(attrs2);
state.allowPath(tree.storePath);
state.allowPath(storePath);
}
static RegisterPrimOp r_fetchMercurial({

13
src/libexpr/primops/fetchTree.cc
View file

@ -5,6 +5,7 @@
#include "fetchers.hh"
#include "filetransfer.hh"
#include "registry.hh"
#include "tarball.hh"
#include "url.hh"
#include <ctime>
@ -15,7 +16,7 @@ namespace nix {
void emitTreeAttrs(
EvalState & state,
const fetchers::Tree & tree,
const StorePath & storePath,
const fetchers::Input & input,
Value & v,
bool emptyRevFallback,
@ -25,7 +26,7 @@ void emitTreeAttrs(
auto attrs = state.buildBindings(10);
state.mkStorePathString(tree.storePath, attrs.alloc(state.sOutPath));
state.mkStorePathString(storePath, attrs.alloc(state.sOutPath));
// FIXME: support arbitrary input attributes.
@ -165,11 +166,11 @@ static void fetchTree(
state.checkURI(input.toURLString());
auto [tree, input2] = input.fetch(state.store);
auto [storePath, input2] = input.fetch(state.store);
state.allowPath(tree.storePath);
state.allowPath(storePath);
emitTreeAttrs(state, tree, input2, v, params.emptyRevFallback, false);
emitTreeAttrs(state, storePath, input2, v, params.emptyRevFallback, false);
}
static void prim_fetchTree(EvalState & state, const PosIdx pos, Value * * args, Value & v)
@ -288,7 +289,7 @@ static void fetch(EvalState & state, const PosIdx pos, Value * * args, Value & v
// https://github.com/NixOS/nix/issues/4313
auto storePath =
unpack
? fetchers::downloadTarball(state.store, *url, name, (bool) expectedHash).tree.storePath
? fetchers::downloadTarball(state.store, *url, name, (bool) expectedHash).storePath
: fetchers::downloadFile(state.store, *url, name, (bool) expectedHash).storePath;
if (expectedHash) {

18
src/libfetchers/fetchers.cc
View file

@ -109,7 +109,7 @@ bool Input::contains(const Input & other) const
return false;
}
std::pair<Tree, Input> Input::fetch(ref<Store> store) const
std::pair<StorePath, Input> Input::fetch(ref<Store> store) const
{
if (!scheme)
throw Error("cannot fetch unsupported input '%s'", attrsToJSON(toAttrs()));
@ -126,7 +126,7 @@ std::pair<Tree, Input> Input::fetch(ref<Store> store) const
debug("using substituted/cached input '%s' in '%s'",
to_string(), store->printStorePath(storePath));
return {Tree { .actualPath = store->toRealPath(storePath), .storePath = std::move(storePath) }, *this};
return {std::move(storePath), *this};
} catch (Error & e) {
debug("substitution of input '%s' failed: %s", to_string(), e.what());
}
@ -141,18 +141,16 @@ std::pair<Tree, Input> Input::fetch(ref<Store> store) const
}
}();
Tree tree {
.actualPath = store->toRealPath(storePath),
.storePath = storePath,
};
auto narHash = store->queryPathInfo(tree.storePath)->narHash;
auto narHash = store->queryPathInfo(storePath)->narHash;
input.attrs.insert_or_assign("narHash", narHash.to_string(HashFormat::SRI, true));
if (auto prevNarHash = getNarHash()) {
if (narHash != *prevNarHash)
throw Error((unsigned int) 102, "NAR hash mismatch in input '%s' (%s), expected '%s', got '%s'",
to_string(), tree.actualPath, prevNarHash->to_string(HashFormat::SRI, true), narHash.to_string(HashFormat::SRI, true));
to_string(),
store->printStorePath(storePath),
prevNarHash->to_string(HashFormat::SRI, true),
narHash.to_string(HashFormat::SRI, true));
}
if (auto prevLastModified = getLastModified()) {
@ -175,7 +173,7 @@ std::pair<Tree, Input> Input::fetch(ref<Store> store) const
input.locked = true;
return {std::move(tree), input};
return {std::move(storePath), input};
}
Input Input::applyOverrides(

41
src/libfetchers/fetchers.hh
View file

@ -13,12 +13,6 @@ namespace nix { class Store; }
namespace nix::fetchers {
struct Tree
{
Path actualPath;
StorePath storePath;
};
struct InputScheme;
/**
@ -83,10 +77,10 @@ public:
bool contains(const Input & other) const;
/**
* Fetch the input into the Nix store, returning the location in
* the Nix store and the locked input.
* Fetch the entire input into the Nix store, returning the
* location in the Nix store and the locked input.
*/
std::pair<Tree, Input> fetch(ref<Store> store) const;
std::pair<StorePath, Input> fetch(ref<Store> store) const;
Input applyOverrides(
std::optional<std::string> ref,
@ -158,33 +152,4 @@ struct InputScheme
void registerInputScheme(std::shared_ptr<InputScheme> && fetcher);
struct DownloadFileResult
{
StorePath storePath;
std::string etag;
std::string effectiveUrl;
std::optional<std::string> immutableUrl;
};
DownloadFileResult downloadFile(
ref<Store> store,
const std::string & url,
const std::string & name,
bool locked,
const Headers & headers = {});
struct DownloadTarballResult
{
Tree tree;
time_t lastModified;
std::optional<std::string> immutableUrl;
};
DownloadTarballResult downloadTarball(
ref<Store> store,
const std::string & url,
const std::string & name,
bool locked,
const Headers & headers = {});
}

5
src/libfetchers/github.cc
View file

@ -7,6 +7,7 @@
#include "git.hh"
#include "fetchers.hh"
#include "fetch-settings.hh"
#include "tarball.hh"
#include <optional>
#include <nlohmann/json.hpp>
@ -213,10 +214,10 @@ struct GitArchiveInputScheme : InputScheme
{"rev", rev->gitRev()},
{"lastModified", uint64_t(result.lastModified)}
},
result.tree.storePath,
result.storePath,
true);
return {result.tree.storePath, input};
return {result.storePath, input};
}
std::optional<ExperimentalFeature> experimentalFeature() override

2
src/libfetchers/registry.cc
View file

@ -1,5 +1,5 @@
#include "registry.hh"
#include "fetchers.hh"
#include "tarball.hh"
#include "util.hh"
#include "globals.hh"
#include "store-api.hh"

7
src/libfetchers/tarball.cc
View file

@ -1,3 +1,4 @@
#include "tarball.hh"
#include "fetchers.hh"
#include "cache.hh"
#include "filetransfer.hh"
@ -133,7 +134,7 @@ DownloadTarballResult downloadTarball(
if (cached && !cached->expired)
return {
.tree = Tree { .actualPath = store->toRealPath(cached->storePath), .storePath = std::move(cached->storePath) },
.storePath = std::move(cached->storePath),
.lastModified = (time_t) getIntAttr(cached->infoAttrs, "lastModified"),
.immutableUrl = maybeGetStrAttr(cached->infoAttrs, "immutableUrl"),
};
@ -174,7 +175,7 @@ DownloadTarballResult downloadTarball(
locked);
return {
.tree = Tree { .actualPath = store->toRealPath(*unpackedStorePath), .storePath = std::move(*unpackedStorePath) },
.storePath = std::move(*unpackedStorePath),
.lastModified = lastModified,
.immutableUrl = res.immutableUrl,
};
@ -307,7 +308,7 @@ struct TarballInputScheme : CurlInputScheme
if (result.lastModified && !input.attrs.contains("lastModified"))
input.attrs.insert_or_assign("lastModified", uint64_t(result.lastModified));
return {result.tree.storePath, std::move(input)};
return {result.storePath, std::move(input)};
}
};

43
src/libfetchers/tarball.hh Normal file
View file

@ -0,0 +1,43 @@
#pragma once
#include "types.hh"
#include "path.hh"
#include <optional>
namespace nix {
class Store;
}
namespace nix::fetchers {
struct DownloadFileResult
{
StorePath storePath;
std::string etag;
std::string effectiveUrl;
std::optional<std::string> immutableUrl;
};
DownloadFileResult downloadFile(
ref<Store> store,
const std::string & url,
const std::string & name,
bool locked,
const Headers & headers = {});
struct DownloadTarballResult
{
StorePath storePath;
time_t lastModified;
std::optional<std::string> immutableUrl;
};
DownloadTarballResult downloadTarball(
ref<Store> store,
const std::string & url,
const std::string & name,
bool locked,
const Headers & headers = {});
}

2
src/nix-channel/nix-channel.cc
View file

@ -4,9 +4,9 @@
#include "filetransfer.hh"
#include "store-api.hh"
#include "legacy.hh"
#include "fetchers.hh"
#include "eval-settings.hh" // for defexpr
#include "util.hh"
#include "tarball.hh"
#include <fcntl.h>
#include <regex>

18
src/nix/flake.cc
View file

@ -186,7 +186,7 @@ struct CmdFlakeMetadata : FlakeCommand, MixJSON
j["revCount"] = *revCount;
if (auto lastModified = flake.lockedRef.input.getLastModified())
j["lastModified"] = *lastModified;
j["path"] = store->printStorePath(flake.sourceInfo->storePath);
j["path"] = store->printStorePath(flake.storePath);
j["locks"] = lockedFlake.lockFile.toJSON();
logger->cout("%s", j.dump());
} else {
@ -202,7 +202,7 @@ struct CmdFlakeMetadata : FlakeCommand, MixJSON
*flake.description);
logger->cout(
ANSI_BOLD "Path:" ANSI_NORMAL " %s",
store->printStorePath(flake.sourceInfo->storePath));
store->printStorePath(flake.storePath));
if (auto rev = flake.lockedRef.input.getRev())
logger->cout(
ANSI_BOLD "Revision:" ANSI_NORMAL " %s",
@ -976,7 +976,7 @@ struct CmdFlakeArchive : FlakeCommand, MixJSON, MixDryRun
StorePathSet sources;
sources.insert(flake.flake.sourceInfo->storePath);
sources.insert(flake.flake.storePath);
// FIXME: use graph output, handle cycles.
std::function<nlohmann::json(const Node & node)> traverse;
@ -988,7 +988,7 @@ struct CmdFlakeArchive : FlakeCommand, MixJSON, MixDryRun
auto storePath =
dryRun
? (*inputNode)->lockedRef.input.computeStorePath(*store)
: (*inputNode)->lockedRef.input.fetch(store).first.storePath;
: (*inputNode)->lockedRef.input.fetch(store).first;
if (json) {
auto& jsonObj3 = jsonObj2[inputName];
jsonObj3["path"] = store->printStorePath(storePath);
@ -1005,7 +1005,7 @@ struct CmdFlakeArchive : FlakeCommand, MixJSON, MixDryRun
if (json) {
nlohmann::json jsonRoot = {
{"path", store->printStorePath(flake.flake.sourceInfo->storePath)},
{"path", store->printStorePath(flake.flake.storePath)},
{"inputs", traverse(*flake.lockFile.root)},
};
logger->cout("%s", jsonRoot);
@ -1339,12 +1339,12 @@ struct CmdFlakePrefetch : FlakeCommand, MixJSON
{
auto originalRef = getFlakeRef();
auto resolvedRef = originalRef.resolve(store);
auto [tree, lockedRef] = resolvedRef.fetchTree(store);
auto hash = store->queryPathInfo(tree.storePath)->narHash;
auto [storePath, lockedRef] = resolvedRef.fetchTree(store);
auto hash = store->queryPathInfo(storePath)->narHash;
if (json) {
auto res = nlohmann::json::object();
res["storePath"] = store->printStorePath(tree.storePath);
res["storePath"] = store->printStorePath(storePath);
res["hash"] = hash.to_string(HashFormat::SRI, true);
res["original"] = fetchers::attrsToJSON(resolvedRef.toAttrs());
res["locked"] = fetchers::attrsToJSON(lockedRef.toAttrs());
@ -1352,7 +1352,7 @@ struct CmdFlakePrefetch : FlakeCommand, MixJSON
} else {
notice("Downloaded '%s' to '%s' (hash '%s').",
lockedRef.to_string(),
store->printStorePath(tree.storePath),
store->printStorePath(storePath),
hash.to_string(HashFormat::SRI, true));
}
}