forked from lix-project/lix
197feed51d
1. `DerivationOutput` now as the `std::variant` as a base class. And the variants are given hierarchical names under `DerivationOutput`. In8e0d0689be@matthewbauer and I didn't know a better idiom, and so we made it a field. But this sort of "newtype" is anoying for literals downstream. Since then we leaned the base class, inherit the constructors trick, e.g. used in `DerivedPath`. Switching to use that makes this more ergonomic, and consistent. 2. `store-api.hh` and `derivations.hh` are now independent. Inbcde5456ccI swapped the dependency, but I now know it is better to just keep on using incomplete types as much as possible for faster compilation and good separation of concerns.
1433 lines
45 KiB
C++
1433 lines
45 KiB
C++
#include "crypto.hh"
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#include "fs-accessor.hh"
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#include "globals.hh"
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#include "derivations.hh"
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#include "store-api.hh"
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#include "util.hh"
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#include "nar-info-disk-cache.hh"
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#include "thread-pool.hh"
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#include "json.hh"
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#include "url.hh"
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#include "archive.hh"
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#include "callback.hh"
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#include "remote-store.hh"
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#include <regex>
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namespace nix {
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bool Store::isInStore(const Path & path) const
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{
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return isInDir(path, storeDir);
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}
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std::pair<StorePath, Path> Store::toStorePath(const Path & path) const
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{
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if (!isInStore(path))
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throw Error("path '%1%' is not in the Nix store", path);
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Path::size_type slash = path.find('/', storeDir.size() + 1);
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if (slash == Path::npos)
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return {parseStorePath(path), ""};
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else
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return {parseStorePath(std::string_view(path).substr(0, slash)), path.substr(slash)};
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}
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Path Store::followLinksToStore(std::string_view _path) const
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{
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Path path = absPath(std::string(_path));
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while (!isInStore(path)) {
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if (!isLink(path)) break;
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auto target = readLink(path);
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path = absPath(target, dirOf(path));
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}
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if (!isInStore(path))
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throw BadStorePath("path '%1%' is not in the Nix store", path);
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return path;
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}
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StorePath Store::followLinksToStorePath(std::string_view path) const
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{
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return toStorePath(followLinksToStore(path)).first;
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}
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/* Store paths have the following form:
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<realized-path> = <store>/<h>-<name>
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where
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<store> = the location of the Nix store, usually /nix/store
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<name> = a human readable name for the path, typically obtained
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from the name attribute of the derivation, or the name of the
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source file from which the store path is created. For derivation
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outputs other than the default "out" output, the string "-<id>"
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is suffixed to <name>.
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<h> = base-32 representation of the first 160 bits of a SHA-256
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hash of <s>; the hash part of the store name
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<s> = the string "<type>:sha256:<h2>:<store>:<name>";
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note that it includes the location of the store as well as the
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name to make sure that changes to either of those are reflected
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in the hash (e.g. you won't get /nix/store/<h>-name1 and
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/nix/store/<h>-name2 with equal hash parts).
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<type> = one of:
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"text:<r1>:<r2>:...<rN>"
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for plain text files written to the store using
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addTextToStore(); <r1> ... <rN> are the store paths referenced
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by this path, in the form described by <realized-path>
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"source:<r1>:<r2>:...:<rN>:self"
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for paths copied to the store using addToStore() when recursive
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= true and hashAlgo = "sha256". Just like in the text case, we
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can have the store paths referenced by the path.
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Additionally, we can have an optional :self label to denote self
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reference.
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"output:<id>"
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for either the outputs created by derivations, OR paths copied
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to the store using addToStore() with recursive != true or
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hashAlgo != "sha256" (in that case "source" is used; it's
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silly, but it's done that way for compatibility). <id> is the
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name of the output (usually, "out").
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<h2> = base-16 representation of a SHA-256 hash of:
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if <type> = "text:...":
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the string written to the resulting store path
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if <type> = "source":
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the serialisation of the path from which this store path is
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copied, as returned by hashPath()
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if <type> = "output:<id>":
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for non-fixed derivation outputs:
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the derivation (see hashDerivationModulo() in
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primops.cc)
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for paths copied by addToStore() or produced by fixed-output
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derivations:
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the string "fixed:out:<rec><algo>:<hash>:", where
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<rec> = "r:" for recursive (path) hashes, or "" for flat
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(file) hashes
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<algo> = "md5", "sha1" or "sha256"
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<hash> = base-16 representation of the path or flat hash of
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the contents of the path (or expected contents of the
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path for fixed-output derivations)
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Note that since an output derivation has always type output, while
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something added by addToStore can have type output or source depending
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on the hash, this means that the same input can be hashed differently
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if added to the store via addToStore or via a derivation, in the sha256
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recursive case.
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It would have been nicer to handle fixed-output derivations under
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"source", e.g. have something like "source:<rec><algo>", but we're
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stuck with this for now...
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The main reason for this way of computing names is to prevent name
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collisions (for security). For instance, it shouldn't be feasible
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to come up with a derivation whose output path collides with the
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path for a copied source. The former would have a <s> starting with
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"output:out:", while the latter would have a <s> starting with
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"source:".
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*/
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StorePath Store::makeStorePath(std::string_view type,
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std::string_view hash, std::string_view name) const
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{
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/* e.g., "source:sha256:1abc...:/nix/store:foo.tar.gz" */
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auto s = std::string(type) + ":" + std::string(hash)
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+ ":" + storeDir + ":" + std::string(name);
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auto h = compressHash(hashString(htSHA256, s), 20);
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return StorePath(h, name);
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}
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StorePath Store::makeStorePath(std::string_view type,
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const Hash & hash, std::string_view name) const
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{
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return makeStorePath(type, hash.to_string(Base16, true), name);
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}
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StorePath Store::makeOutputPath(std::string_view id,
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const Hash & hash, std::string_view name) const
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{
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return makeStorePath("output:" + std::string { id }, hash, outputPathName(name, id));
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}
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static std::string makeType(
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const Store & store,
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std::string && type,
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const StorePathSet & references,
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bool hasSelfReference = false)
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{
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for (auto & i : references) {
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type += ":";
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type += store.printStorePath(i);
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}
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if (hasSelfReference) type += ":self";
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return std::move(type);
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}
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StorePath Store::makeFixedOutputPath(
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FileIngestionMethod method,
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const Hash & hash,
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std::string_view name,
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const StorePathSet & references,
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bool hasSelfReference) const
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{
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if (hash.type == htSHA256 && method == FileIngestionMethod::Recursive) {
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return makeStorePath(makeType(*this, "source", references, hasSelfReference), hash, name);
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} else {
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assert(references.empty());
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return makeStorePath("output:out",
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hashString(htSHA256,
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"fixed:out:"
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+ makeFileIngestionPrefix(method)
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+ hash.to_string(Base16, true) + ":"),
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name);
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}
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}
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StorePath Store::makeFixedOutputPathFromCA(std::string_view name, ContentAddress ca,
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const StorePathSet & references, bool hasSelfReference) const
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{
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// New template
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return std::visit(overloaded {
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[&](const TextHash & th) {
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return makeTextPath(name, th.hash, references);
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},
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[&](const FixedOutputHash & fsh) {
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return makeFixedOutputPath(fsh.method, fsh.hash, name, references, hasSelfReference);
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}
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}, ca);
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}
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StorePath Store::makeTextPath(std::string_view name, const Hash & hash,
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const StorePathSet & references) const
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{
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assert(hash.type == htSHA256);
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/* Stuff the references (if any) into the type. This is a bit
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hacky, but we can't put them in `s' since that would be
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ambiguous. */
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return makeStorePath(makeType(*this, "text", references), hash, name);
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}
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std::pair<StorePath, Hash> Store::computeStorePathForPath(std::string_view name,
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const Path & srcPath, FileIngestionMethod method, HashType hashAlgo, PathFilter & filter) const
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{
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Hash h = method == FileIngestionMethod::Recursive
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? hashPath(hashAlgo, srcPath, filter).first
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: hashFile(hashAlgo, srcPath);
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return std::make_pair(makeFixedOutputPath(method, h, name), h);
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}
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StorePath Store::computeStorePathForText(
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std::string_view name,
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std::string_view s,
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const StorePathSet & references) const
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{
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return makeTextPath(name, hashString(htSHA256, s), references);
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}
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StorePath Store::addToStore(
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std::string_view name,
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const Path & _srcPath,
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FileIngestionMethod method,
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HashType hashAlgo,
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PathFilter & filter,
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RepairFlag repair,
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const StorePathSet & references)
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{
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Path srcPath(absPath(_srcPath));
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auto source = sinkToSource([&](Sink & sink) {
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if (method == FileIngestionMethod::Recursive)
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dumpPath(srcPath, sink, filter);
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else
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readFile(srcPath, sink);
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});
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return addToStoreFromDump(*source, name, method, hashAlgo, repair, references);
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}
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void Store::addMultipleToStore(
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Source & source,
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RepairFlag repair,
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CheckSigsFlag checkSigs)
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{
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auto expected = readNum<uint64_t>(source);
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for (uint64_t i = 0; i < expected; ++i) {
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auto info = ValidPathInfo::read(source, *this, 16);
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info.ultimate = false;
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addToStore(info, source, repair, checkSigs);
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}
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}
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/*
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The aim of this function is to compute in one pass the correct ValidPathInfo for
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the files that we are trying to add to the store. To accomplish that in one
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pass, given the different kind of inputs that we can take (normal nar archives,
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nar archives with non SHA-256 hashes, and flat files), we set up a net of sinks
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and aliases. Also, since the dataflow is obfuscated by this, we include here a
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graphviz diagram:
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digraph graphname {
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node [shape=box]
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fileSource -> narSink
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narSink [style=dashed]
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narSink -> unsualHashTee [style = dashed, label = "Recursive && !SHA-256"]
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narSink -> narHashSink [style = dashed, label = "else"]
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unsualHashTee -> narHashSink
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unsualHashTee -> caHashSink
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fileSource -> parseSink
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parseSink [style=dashed]
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parseSink-> fileSink [style = dashed, label = "Flat"]
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parseSink -> blank [style = dashed, label = "Recursive"]
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fileSink -> caHashSink
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}
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*/
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ValidPathInfo Store::addToStoreSlow(std::string_view name, const Path & srcPath,
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FileIngestionMethod method, HashType hashAlgo,
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std::optional<Hash> expectedCAHash)
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{
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HashSink narHashSink { htSHA256 };
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HashSink caHashSink { hashAlgo };
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/* Note that fileSink and unusualHashTee must be mutually exclusive, since
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they both write to caHashSink. Note that that requisite is currently true
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because the former is only used in the flat case. */
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RetrieveRegularNARSink fileSink { caHashSink };
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TeeSink unusualHashTee { narHashSink, caHashSink };
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auto & narSink = method == FileIngestionMethod::Recursive && hashAlgo != htSHA256
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? static_cast<Sink &>(unusualHashTee)
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: narHashSink;
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/* Functionally, this means that fileSource will yield the content of
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srcPath. The fact that we use scratchpadSink as a temporary buffer here
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is an implementation detail. */
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auto fileSource = sinkToSource([&](Sink & scratchpadSink) {
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dumpPath(srcPath, scratchpadSink);
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});
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/* tapped provides the same data as fileSource, but we also write all the
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information to narSink. */
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TeeSource tapped { *fileSource, narSink };
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ParseSink blank;
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auto & parseSink = method == FileIngestionMethod::Flat
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? fileSink
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: blank;
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/* The information that flows from tapped (besides being replicated in
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narSink), is now put in parseSink. */
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parseDump(parseSink, tapped);
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/* We extract the result of the computation from the sink by calling
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finish. */
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auto [narHash, narSize] = narHashSink.finish();
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auto hash = method == FileIngestionMethod::Recursive && hashAlgo == htSHA256
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? narHash
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: caHashSink.finish().first;
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if (expectedCAHash && expectedCAHash != hash)
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throw Error("hash mismatch for '%s'", srcPath);
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ValidPathInfo info {
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makeFixedOutputPath(method, hash, name),
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narHash,
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};
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info.narSize = narSize;
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info.ca = FixedOutputHash { .method = method, .hash = hash };
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if (!isValidPath(info.path)) {
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auto source = sinkToSource([&](Sink & scratchpadSink) {
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dumpPath(srcPath, scratchpadSink);
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});
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addToStore(info, *source);
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}
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return info;
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}
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StringSet StoreConfig::getDefaultSystemFeatures()
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{
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auto res = settings.systemFeatures.get();
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if (settings.isExperimentalFeatureEnabled(Xp::CaDerivations))
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res.insert("ca-derivations");
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if (settings.isExperimentalFeatureEnabled(Xp::RecursiveNix))
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res.insert("recursive-nix");
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return res;
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}
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Store::Store(const Params & params)
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: StoreConfig(params)
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, state({(size_t) pathInfoCacheSize})
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{
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}
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std::string Store::getUri()
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{
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return "";
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}
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bool Store::PathInfoCacheValue::isKnownNow()
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{
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std::chrono::duration ttl = didExist()
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? std::chrono::seconds(settings.ttlPositiveNarInfoCache)
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: std::chrono::seconds(settings.ttlNegativeNarInfoCache);
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return std::chrono::steady_clock::now() < time_point + ttl;
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}
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std::map<std::string, std::optional<StorePath>> Store::queryPartialDerivationOutputMap(const StorePath & path)
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{
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std::map<std::string, std::optional<StorePath>> outputs;
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auto drv = readInvalidDerivation(path);
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for (auto& [outputName, output] : drv.outputsAndOptPaths(*this)) {
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outputs.emplace(outputName, output.second);
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}
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return outputs;
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}
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OutputPathMap Store::queryDerivationOutputMap(const StorePath & path) {
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auto resp = queryPartialDerivationOutputMap(path);
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OutputPathMap result;
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for (auto & [outName, optOutPath] : resp) {
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if (!optOutPath)
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throw Error("output '%s' of derivation '%s' has no store path mapped to it", outName, printStorePath(path));
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result.insert_or_assign(outName, *optOutPath);
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}
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return result;
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}
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StorePathSet Store::queryDerivationOutputs(const StorePath & path)
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{
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auto outputMap = this->queryDerivationOutputMap(path);
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StorePathSet outputPaths;
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for (auto & i: outputMap) {
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outputPaths.emplace(std::move(i.second));
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}
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return outputPaths;
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}
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bool Store::isValidPath(const StorePath & storePath)
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{
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{
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auto state_(state.lock());
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auto res = state_->pathInfoCache.get(std::string(storePath.to_string()));
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if (res && res->isKnownNow()) {
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stats.narInfoReadAverted++;
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return res->didExist();
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}
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}
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if (diskCache) {
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auto res = diskCache->lookupNarInfo(getUri(), std::string(storePath.hashPart()));
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if (res.first != NarInfoDiskCache::oUnknown) {
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stats.narInfoReadAverted++;
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auto state_(state.lock());
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state_->pathInfoCache.upsert(std::string(storePath.to_string()),
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res.first == NarInfoDiskCache::oInvalid ? PathInfoCacheValue{} : PathInfoCacheValue { .value = res.second });
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return res.first == NarInfoDiskCache::oValid;
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}
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}
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bool valid = isValidPathUncached(storePath);
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if (diskCache && !valid)
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// FIXME: handle valid = true case.
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diskCache->upsertNarInfo(getUri(), std::string(storePath.hashPart()), 0);
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return valid;
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}
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/* Default implementation for stores that only implement
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queryPathInfoUncached(). */
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bool Store::isValidPathUncached(const StorePath & path)
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{
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try {
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queryPathInfo(path);
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return true;
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} catch (InvalidPath &) {
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return false;
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}
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}
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ref<const ValidPathInfo> Store::queryPathInfo(const StorePath & storePath)
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{
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std::promise<ref<const ValidPathInfo>> promise;
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queryPathInfo(storePath,
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{[&](std::future<ref<const ValidPathInfo>> result) {
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try {
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promise.set_value(result.get());
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} catch (...) {
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promise.set_exception(std::current_exception());
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}
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}});
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return promise.get_future().get();
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}
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static bool goodStorePath(const StorePath & expected, const StorePath & actual)
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{
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return
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expected.hashPart() == actual.hashPart()
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&& (expected.name() == Store::MissingName || expected.name() == actual.name());
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}
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void Store::queryPathInfo(const StorePath & storePath,
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Callback<ref<const ValidPathInfo>> callback) noexcept
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{
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auto hashPart = std::string(storePath.hashPart());
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try {
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{
|
|
auto res = state.lock()->pathInfoCache.get(std::string(storePath.to_string()));
|
|
if (res && res->isKnownNow()) {
|
|
stats.narInfoReadAverted++;
|
|
if (!res->didExist())
|
|
throw InvalidPath("path '%s' is not valid", printStorePath(storePath));
|
|
return callback(ref<const ValidPathInfo>(res->value));
|
|
}
|
|
}
|
|
|
|
if (diskCache) {
|
|
auto res = diskCache->lookupNarInfo(getUri(), hashPart);
|
|
if (res.first != NarInfoDiskCache::oUnknown) {
|
|
stats.narInfoReadAverted++;
|
|
{
|
|
auto state_(state.lock());
|
|
state_->pathInfoCache.upsert(std::string(storePath.to_string()),
|
|
res.first == NarInfoDiskCache::oInvalid ? PathInfoCacheValue{} : PathInfoCacheValue{ .value = res.second });
|
|
if (res.first == NarInfoDiskCache::oInvalid ||
|
|
!goodStorePath(storePath, res.second->path))
|
|
throw InvalidPath("path '%s' is not valid", printStorePath(storePath));
|
|
}
|
|
return callback(ref<const ValidPathInfo>(res.second));
|
|
}
|
|
}
|
|
|
|
} catch (...) { return callback.rethrow(); }
|
|
|
|
auto callbackPtr = std::make_shared<decltype(callback)>(std::move(callback));
|
|
|
|
queryPathInfoUncached(storePath,
|
|
{[this, storePath, hashPart, callbackPtr](std::future<std::shared_ptr<const ValidPathInfo>> fut) {
|
|
|
|
try {
|
|
auto info = fut.get();
|
|
|
|
if (diskCache)
|
|
diskCache->upsertNarInfo(getUri(), hashPart, info);
|
|
|
|
{
|
|
auto state_(state.lock());
|
|
state_->pathInfoCache.upsert(std::string(storePath.to_string()), PathInfoCacheValue { .value = info });
|
|
}
|
|
|
|
if (!info || !goodStorePath(storePath, info->path)) {
|
|
stats.narInfoMissing++;
|
|
throw InvalidPath("path '%s' is not valid", printStorePath(storePath));
|
|
}
|
|
|
|
(*callbackPtr)(ref<const ValidPathInfo>(info));
|
|
} catch (...) { callbackPtr->rethrow(); }
|
|
}});
|
|
}
|
|
|
|
void Store::queryRealisation(const DrvOutput & id,
|
|
Callback<std::shared_ptr<const Realisation>> callback) noexcept
|
|
{
|
|
|
|
try {
|
|
if (diskCache) {
|
|
auto [cacheOutcome, maybeCachedRealisation]
|
|
= diskCache->lookupRealisation(getUri(), id);
|
|
switch (cacheOutcome) {
|
|
case NarInfoDiskCache::oValid:
|
|
debug("Returning a cached realisation for %s", id.to_string());
|
|
callback(maybeCachedRealisation);
|
|
return;
|
|
case NarInfoDiskCache::oInvalid:
|
|
debug(
|
|
"Returning a cached missing realisation for %s",
|
|
id.to_string());
|
|
callback(nullptr);
|
|
return;
|
|
case NarInfoDiskCache::oUnknown:
|
|
break;
|
|
}
|
|
}
|
|
} catch (...) {
|
|
return callback.rethrow();
|
|
}
|
|
|
|
auto callbackPtr
|
|
= std::make_shared<decltype(callback)>(std::move(callback));
|
|
|
|
queryRealisationUncached(
|
|
id,
|
|
{ [this, id, callbackPtr](
|
|
std::future<std::shared_ptr<const Realisation>> fut) {
|
|
try {
|
|
auto info = fut.get();
|
|
|
|
if (diskCache) {
|
|
if (info)
|
|
diskCache->upsertRealisation(getUri(), *info);
|
|
else
|
|
diskCache->upsertAbsentRealisation(getUri(), id);
|
|
}
|
|
|
|
(*callbackPtr)(std::shared_ptr<const Realisation>(info));
|
|
|
|
} catch (...) {
|
|
callbackPtr->rethrow();
|
|
}
|
|
} });
|
|
}
|
|
|
|
std::shared_ptr<const Realisation> Store::queryRealisation(const DrvOutput & id)
|
|
{
|
|
using RealPtr = std::shared_ptr<const Realisation>;
|
|
std::promise<RealPtr> promise;
|
|
|
|
queryRealisation(id,
|
|
{[&](std::future<RealPtr> result) {
|
|
try {
|
|
promise.set_value(result.get());
|
|
} catch (...) {
|
|
promise.set_exception(std::current_exception());
|
|
}
|
|
}});
|
|
|
|
return promise.get_future().get();
|
|
}
|
|
|
|
void Store::substitutePaths(const StorePathSet & paths)
|
|
{
|
|
std::vector<DerivedPath> paths2;
|
|
for (auto & path : paths)
|
|
if (!path.isDerivation())
|
|
paths2.push_back(DerivedPath::Opaque{path});
|
|
uint64_t downloadSize, narSize;
|
|
StorePathSet willBuild, willSubstitute, unknown;
|
|
queryMissing(paths2,
|
|
willBuild, willSubstitute, unknown, downloadSize, narSize);
|
|
|
|
if (!willSubstitute.empty())
|
|
try {
|
|
std::vector<DerivedPath> subs;
|
|
for (auto & p : willSubstitute) subs.push_back(DerivedPath::Opaque{p});
|
|
buildPaths(subs);
|
|
} catch (Error & e) {
|
|
logWarning(e.info());
|
|
}
|
|
}
|
|
|
|
|
|
StorePathSet Store::queryValidPaths(const StorePathSet & paths, SubstituteFlag maybeSubstitute)
|
|
{
|
|
struct State
|
|
{
|
|
size_t left;
|
|
StorePathSet valid;
|
|
std::exception_ptr exc;
|
|
};
|
|
|
|
Sync<State> state_(State{paths.size(), StorePathSet()});
|
|
|
|
std::condition_variable wakeup;
|
|
ThreadPool pool;
|
|
|
|
auto doQuery = [&](const Path & path) {
|
|
checkInterrupt();
|
|
queryPathInfo(parseStorePath(path), {[path, this, &state_, &wakeup](std::future<ref<const ValidPathInfo>> fut) {
|
|
auto state(state_.lock());
|
|
try {
|
|
auto info = fut.get();
|
|
state->valid.insert(parseStorePath(path));
|
|
} catch (InvalidPath &) {
|
|
} catch (...) {
|
|
state->exc = std::current_exception();
|
|
}
|
|
assert(state->left);
|
|
if (!--state->left)
|
|
wakeup.notify_one();
|
|
}});
|
|
};
|
|
|
|
for (auto & path : paths)
|
|
pool.enqueue(std::bind(doQuery, printStorePath(path))); // FIXME
|
|
|
|
pool.process();
|
|
|
|
while (true) {
|
|
auto state(state_.lock());
|
|
if (!state->left) {
|
|
if (state->exc) std::rethrow_exception(state->exc);
|
|
return std::move(state->valid);
|
|
}
|
|
state.wait(wakeup);
|
|
}
|
|
}
|
|
|
|
|
|
/* Return a string accepted by decodeValidPathInfo() that
|
|
registers the specified paths as valid. Note: it's the
|
|
responsibility of the caller to provide a closure. */
|
|
std::string Store::makeValidityRegistration(const StorePathSet & paths,
|
|
bool showDerivers, bool showHash)
|
|
{
|
|
std::string s = "";
|
|
|
|
for (auto & i : paths) {
|
|
s += printStorePath(i) + "\n";
|
|
|
|
auto info = queryPathInfo(i);
|
|
|
|
if (showHash) {
|
|
s += info->narHash.to_string(Base16, false) + "\n";
|
|
s += (format("%1%\n") % info->narSize).str();
|
|
}
|
|
|
|
auto deriver = showDerivers && info->deriver ? printStorePath(*info->deriver) : "";
|
|
s += deriver + "\n";
|
|
|
|
s += (format("%1%\n") % info->references.size()).str();
|
|
|
|
for (auto & j : info->references)
|
|
s += printStorePath(j) + "\n";
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
|
|
StorePathSet Store::exportReferences(const StorePathSet & storePaths, const StorePathSet & inputPaths)
|
|
{
|
|
StorePathSet paths;
|
|
|
|
for (auto & storePath : storePaths) {
|
|
if (!inputPaths.count(storePath))
|
|
throw BuildError("cannot export references of path '%s' because it is not in the input closure of the derivation", printStorePath(storePath));
|
|
|
|
computeFSClosure({storePath}, paths);
|
|
}
|
|
|
|
/* If there are derivations in the graph, then include their
|
|
outputs as well. This is useful if you want to do things
|
|
like passing all build-time dependencies of some path to a
|
|
derivation that builds a NixOS DVD image. */
|
|
auto paths2 = paths;
|
|
|
|
for (auto & j : paths2) {
|
|
if (j.isDerivation()) {
|
|
Derivation drv = derivationFromPath(j);
|
|
for (auto & k : drv.outputsAndOptPaths(*this)) {
|
|
if (!k.second.second)
|
|
/* FIXME: I am confused why we are calling
|
|
`computeFSClosure` on the output path, rather than
|
|
derivation itself. That doesn't seem right to me, so I
|
|
won't try to implemented this for CA derivations. */
|
|
throw UnimplementedError("exportReferences on CA derivations is not yet implemented");
|
|
computeFSClosure(*k.second.second, paths);
|
|
}
|
|
}
|
|
}
|
|
|
|
return paths;
|
|
}
|
|
|
|
|
|
void Store::pathInfoToJSON(JSONPlaceholder & jsonOut, const StorePathSet & storePaths,
|
|
bool includeImpureInfo, bool showClosureSize,
|
|
Base hashBase,
|
|
AllowInvalidFlag allowInvalid)
|
|
{
|
|
auto jsonList = jsonOut.list();
|
|
|
|
for (auto & storePath : storePaths) {
|
|
auto jsonPath = jsonList.object();
|
|
|
|
try {
|
|
auto info = queryPathInfo(storePath);
|
|
|
|
jsonPath.attr("path", printStorePath(info->path));
|
|
jsonPath
|
|
.attr("narHash", info->narHash.to_string(hashBase, true))
|
|
.attr("narSize", info->narSize);
|
|
|
|
{
|
|
auto jsonRefs = jsonPath.list("references");
|
|
for (auto & ref : info->references)
|
|
jsonRefs.elem(printStorePath(ref));
|
|
}
|
|
|
|
if (info->ca)
|
|
jsonPath.attr("ca", renderContentAddress(info->ca));
|
|
|
|
std::pair<uint64_t, uint64_t> closureSizes;
|
|
|
|
if (showClosureSize) {
|
|
closureSizes = getClosureSize(info->path);
|
|
jsonPath.attr("closureSize", closureSizes.first);
|
|
}
|
|
|
|
if (includeImpureInfo) {
|
|
|
|
if (info->deriver)
|
|
jsonPath.attr("deriver", printStorePath(*info->deriver));
|
|
|
|
if (info->registrationTime)
|
|
jsonPath.attr("registrationTime", info->registrationTime);
|
|
|
|
if (info->ultimate)
|
|
jsonPath.attr("ultimate", info->ultimate);
|
|
|
|
if (!info->sigs.empty()) {
|
|
auto jsonSigs = jsonPath.list("signatures");
|
|
for (auto & sig : info->sigs)
|
|
jsonSigs.elem(sig);
|
|
}
|
|
|
|
auto narInfo = std::dynamic_pointer_cast<const NarInfo>(
|
|
std::shared_ptr<const ValidPathInfo>(info));
|
|
|
|
if (narInfo) {
|
|
if (!narInfo->url.empty())
|
|
jsonPath.attr("url", narInfo->url);
|
|
if (narInfo->fileHash)
|
|
jsonPath.attr("downloadHash", narInfo->fileHash->to_string(hashBase, true));
|
|
if (narInfo->fileSize)
|
|
jsonPath.attr("downloadSize", narInfo->fileSize);
|
|
if (showClosureSize)
|
|
jsonPath.attr("closureDownloadSize", closureSizes.second);
|
|
}
|
|
}
|
|
|
|
} catch (InvalidPath &) {
|
|
jsonPath.attr("path", printStorePath(storePath));
|
|
jsonPath.attr("valid", false);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
std::pair<uint64_t, uint64_t> Store::getClosureSize(const StorePath & storePath)
|
|
{
|
|
uint64_t totalNarSize = 0, totalDownloadSize = 0;
|
|
StorePathSet closure;
|
|
computeFSClosure(storePath, closure, false, false);
|
|
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};
|
|
}
|
|
|
|
|
|
const Store::Stats & Store::getStats()
|
|
{
|
|
{
|
|
auto state_(state.lock());
|
|
stats.pathInfoCacheSize = state_->pathInfoCache.size();
|
|
}
|
|
return stats;
|
|
}
|
|
|
|
|
|
static std::string makeCopyPathMessage(
|
|
std::string_view srcUri,
|
|
std::string_view dstUri,
|
|
std::string_view storePath)
|
|
{
|
|
return srcUri == "local" || srcUri == "daemon"
|
|
? fmt("copying path '%s' to '%s'", storePath, dstUri)
|
|
: dstUri == "local" || dstUri == "daemon"
|
|
? fmt("copying path '%s' from '%s'", storePath, srcUri)
|
|
: fmt("copying path '%s' from '%s' to '%s'", storePath, srcUri, dstUri);
|
|
}
|
|
|
|
|
|
void copyStorePath(
|
|
Store & srcStore,
|
|
Store & dstStore,
|
|
const StorePath & storePath,
|
|
RepairFlag repair,
|
|
CheckSigsFlag checkSigs)
|
|
{
|
|
auto srcUri = srcStore.getUri();
|
|
auto dstUri = dstStore.getUri();
|
|
auto storePathS = srcStore.printStorePath(storePath);
|
|
Activity act(*logger, lvlInfo, actCopyPath,
|
|
makeCopyPathMessage(srcUri, dstUri, storePathS),
|
|
{storePathS, srcUri, dstUri});
|
|
PushActivity pact(act.id);
|
|
|
|
auto info = srcStore.queryPathInfo(storePath);
|
|
|
|
uint64_t total = 0;
|
|
|
|
// recompute store path on the chance dstStore does it differently
|
|
if (info->ca && info->references.empty()) {
|
|
auto info2 = make_ref<ValidPathInfo>(*info);
|
|
info2->path = dstStore.makeFixedOutputPathFromCA(info->path.name(), *info->ca);
|
|
if (dstStore.storeDir == srcStore.storeDir)
|
|
assert(info->path == info2->path);
|
|
info = info2;
|
|
}
|
|
|
|
if (info->ultimate) {
|
|
auto info2 = make_ref<ValidPathInfo>(*info);
|
|
info2->ultimate = false;
|
|
info = info2;
|
|
}
|
|
|
|
auto source = sinkToSource([&](Sink & sink) {
|
|
LambdaSink progressSink([&](std::string_view data) {
|
|
total += data.size();
|
|
act.progress(total, info->narSize);
|
|
});
|
|
TeeSink tee { sink, progressSink };
|
|
srcStore.narFromPath(storePath, tee);
|
|
}, [&]() {
|
|
throw EndOfFile("NAR for '%s' fetched from '%s' is incomplete", srcStore.printStorePath(storePath), srcStore.getUri());
|
|
});
|
|
|
|
dstStore.addToStore(*info, *source, repair, checkSigs);
|
|
}
|
|
|
|
|
|
std::map<StorePath, StorePath> copyPaths(
|
|
Store & srcStore,
|
|
Store & dstStore,
|
|
const RealisedPath::Set & paths,
|
|
RepairFlag repair,
|
|
CheckSigsFlag checkSigs,
|
|
SubstituteFlag substitute)
|
|
{
|
|
StorePathSet storePaths;
|
|
std::set<Realisation> toplevelRealisations;
|
|
for (auto & path : paths) {
|
|
storePaths.insert(path.path());
|
|
if (auto realisation = std::get_if<Realisation>(&path.raw)) {
|
|
settings.requireExperimentalFeature(Xp::CaDerivations);
|
|
toplevelRealisations.insert(*realisation);
|
|
}
|
|
}
|
|
auto pathsMap = copyPaths(srcStore, dstStore, storePaths, repair, checkSigs, substitute);
|
|
|
|
ThreadPool pool;
|
|
|
|
try {
|
|
// Copy the realisation closure
|
|
processGraph<Realisation>(
|
|
pool, Realisation::closure(srcStore, toplevelRealisations),
|
|
[&](const Realisation & current) -> std::set<Realisation> {
|
|
std::set<Realisation> children;
|
|
for (const auto & [drvOutput, _] : current.dependentRealisations) {
|
|
auto currentChild = srcStore.queryRealisation(drvOutput);
|
|
if (!currentChild)
|
|
throw Error(
|
|
"incomplete realisation closure: '%s' is a "
|
|
"dependency of '%s' but isn't registered",
|
|
drvOutput.to_string(), current.id.to_string());
|
|
children.insert(*currentChild);
|
|
}
|
|
return children;
|
|
},
|
|
[&](const Realisation& current) -> void {
|
|
dstStore.registerDrvOutput(current, checkSigs);
|
|
});
|
|
} catch (MissingExperimentalFeature & e) {
|
|
// Don't fail if the remote doesn't support CA derivations is it might
|
|
// not be within our control to change that, and we might still want
|
|
// to at least copy the output paths.
|
|
if (e.missingFeature == Xp::CaDerivations)
|
|
ignoreException();
|
|
else
|
|
throw;
|
|
}
|
|
|
|
return pathsMap;
|
|
}
|
|
|
|
std::map<StorePath, StorePath> copyPaths(
|
|
Store & srcStore,
|
|
Store & dstStore,
|
|
const StorePathSet & storePaths,
|
|
RepairFlag repair,
|
|
CheckSigsFlag checkSigs,
|
|
SubstituteFlag substitute)
|
|
{
|
|
auto valid = dstStore.queryValidPaths(storePaths, substitute);
|
|
|
|
StorePathSet missing;
|
|
for (auto & path : storePaths)
|
|
if (!valid.count(path)) missing.insert(path);
|
|
|
|
std::map<StorePath, StorePath> pathsMap;
|
|
for (auto & path : storePaths)
|
|
pathsMap.insert_or_assign(path, path);
|
|
|
|
Activity act(*logger, lvlInfo, actCopyPaths, fmt("copying %d paths", missing.size()));
|
|
|
|
auto sorted = srcStore.topoSortPaths(missing);
|
|
std::reverse(sorted.begin(), sorted.end());
|
|
|
|
auto source = sinkToSource([&](Sink & sink) {
|
|
sink << sorted.size();
|
|
for (auto & storePath : sorted) {
|
|
auto srcUri = srcStore.getUri();
|
|
auto dstUri = dstStore.getUri();
|
|
auto storePathS = srcStore.printStorePath(storePath);
|
|
Activity act(*logger, lvlInfo, actCopyPath,
|
|
makeCopyPathMessage(srcUri, dstUri, storePathS),
|
|
{storePathS, srcUri, dstUri});
|
|
PushActivity pact(act.id);
|
|
|
|
auto info = srcStore.queryPathInfo(storePath);
|
|
info->write(sink, srcStore, 16);
|
|
srcStore.narFromPath(storePath, sink);
|
|
}
|
|
});
|
|
|
|
dstStore.addMultipleToStore(*source, repair, checkSigs);
|
|
|
|
#if 0
|
|
std::atomic<size_t> nrDone{0};
|
|
std::atomic<size_t> nrFailed{0};
|
|
std::atomic<uint64_t> bytesExpected{0};
|
|
std::atomic<uint64_t> nrRunning{0};
|
|
|
|
auto showProgress = [&]() {
|
|
act.progress(nrDone, missing.size(), nrRunning, nrFailed);
|
|
};
|
|
|
|
ThreadPool pool;
|
|
|
|
processGraph<StorePath>(pool,
|
|
StorePathSet(missing.begin(), missing.end()),
|
|
|
|
[&](const StorePath & storePath) {
|
|
auto info = srcStore.queryPathInfo(storePath);
|
|
auto storePathForDst = storePath;
|
|
if (info->ca && info->references.empty()) {
|
|
storePathForDst = dstStore.makeFixedOutputPathFromCA(storePath.name(), *info->ca);
|
|
if (dstStore.storeDir == srcStore.storeDir)
|
|
assert(storePathForDst == storePath);
|
|
if (storePathForDst != storePath)
|
|
debug("replaced path '%s' to '%s' for substituter '%s'",
|
|
srcStore.printStorePath(storePath),
|
|
dstStore.printStorePath(storePathForDst),
|
|
dstStore.getUri());
|
|
}
|
|
pathsMap.insert_or_assign(storePath, storePathForDst);
|
|
|
|
if (dstStore.isValidPath(storePath)) {
|
|
nrDone++;
|
|
showProgress();
|
|
return StorePathSet();
|
|
}
|
|
|
|
bytesExpected += info->narSize;
|
|
act.setExpected(actCopyPath, bytesExpected);
|
|
|
|
return info->references;
|
|
},
|
|
|
|
[&](const StorePath & storePath) {
|
|
checkInterrupt();
|
|
|
|
auto info = srcStore.queryPathInfo(storePath);
|
|
|
|
auto storePathForDst = storePath;
|
|
if (info->ca && info->references.empty()) {
|
|
storePathForDst = dstStore.makeFixedOutputPathFromCA(storePath.name(), *info->ca);
|
|
if (dstStore.storeDir == srcStore.storeDir)
|
|
assert(storePathForDst == storePath);
|
|
if (storePathForDst != storePath)
|
|
debug("replaced path '%s' to '%s' for substituter '%s'",
|
|
srcStore.printStorePath(storePath),
|
|
dstStore.printStorePath(storePathForDst),
|
|
dstStore.getUri());
|
|
}
|
|
pathsMap.insert_or_assign(storePath, storePathForDst);
|
|
|
|
if (!dstStore.isValidPath(storePathForDst)) {
|
|
MaintainCount<decltype(nrRunning)> mc(nrRunning);
|
|
showProgress();
|
|
try {
|
|
copyStorePath(srcStore, dstStore, storePath, repair, checkSigs);
|
|
} catch (Error &e) {
|
|
nrFailed++;
|
|
if (!settings.keepGoing)
|
|
throw e;
|
|
printMsg(lvlError, "could not copy %s: %s", dstStore.printStorePath(storePath), e.what());
|
|
showProgress();
|
|
return;
|
|
}
|
|
}
|
|
|
|
nrDone++;
|
|
showProgress();
|
|
});
|
|
#endif
|
|
|
|
return pathsMap;
|
|
}
|
|
|
|
void copyClosure(
|
|
Store & srcStore,
|
|
Store & dstStore,
|
|
const RealisedPath::Set & paths,
|
|
RepairFlag repair,
|
|
CheckSigsFlag checkSigs,
|
|
SubstituteFlag substitute)
|
|
{
|
|
if (&srcStore == &dstStore) return;
|
|
|
|
RealisedPath::Set closure;
|
|
RealisedPath::closure(srcStore, paths, closure);
|
|
|
|
copyPaths(srcStore, dstStore, closure, repair, checkSigs, substitute);
|
|
}
|
|
|
|
void copyClosure(
|
|
Store & srcStore,
|
|
Store & dstStore,
|
|
const StorePathSet & storePaths,
|
|
RepairFlag repair,
|
|
CheckSigsFlag checkSigs,
|
|
SubstituteFlag substitute)
|
|
{
|
|
if (&srcStore == &dstStore) return;
|
|
|
|
StorePathSet closure;
|
|
srcStore.computeFSClosure(storePaths, closure);
|
|
copyPaths(srcStore, dstStore, closure, repair, checkSigs, substitute);
|
|
}
|
|
|
|
std::optional<ValidPathInfo> decodeValidPathInfo(const Store & store, std::istream & str, std::optional<HashResult> hashGiven)
|
|
{
|
|
std::string path;
|
|
getline(str, path);
|
|
if (str.eof()) { return {}; }
|
|
if (!hashGiven) {
|
|
std::string s;
|
|
getline(str, s);
|
|
auto narHash = Hash::parseAny(s, htSHA256);
|
|
getline(str, s);
|
|
auto narSize = string2Int<uint64_t>(s);
|
|
if (!narSize) throw Error("number expected");
|
|
hashGiven = { narHash, *narSize };
|
|
}
|
|
ValidPathInfo info(store.parseStorePath(path), hashGiven->first);
|
|
info.narSize = hashGiven->second;
|
|
std::string deriver;
|
|
getline(str, deriver);
|
|
if (deriver != "") info.deriver = store.parseStorePath(deriver);
|
|
std::string s;
|
|
getline(str, s);
|
|
auto n = string2Int<int>(s);
|
|
if (!n) throw Error("number expected");
|
|
while ((*n)--) {
|
|
getline(str, s);
|
|
info.references.insert(store.parseStorePath(s));
|
|
}
|
|
if (!str || str.eof()) throw Error("missing input");
|
|
return std::optional<ValidPathInfo>(std::move(info));
|
|
}
|
|
|
|
|
|
std::string Store::showPaths(const StorePathSet & paths)
|
|
{
|
|
std::string s;
|
|
for (auto & i : paths) {
|
|
if (s.size() != 0) s += ", ";
|
|
s += "'" + printStorePath(i) + "'";
|
|
}
|
|
return s;
|
|
}
|
|
|
|
|
|
std::string showPaths(const PathSet & paths)
|
|
{
|
|
return concatStringsSep(", ", quoteStrings(paths));
|
|
}
|
|
|
|
|
|
std::string ValidPathInfo::fingerprint(const Store & store) const
|
|
{
|
|
if (narSize == 0)
|
|
throw Error("cannot calculate fingerprint of path '%s' because its size is not known",
|
|
store.printStorePath(path));
|
|
return
|
|
"1;" + store.printStorePath(path) + ";"
|
|
+ narHash.to_string(Base32, true) + ";"
|
|
+ std::to_string(narSize) + ";"
|
|
+ concatStringsSep(",", store.printStorePathSet(references));
|
|
}
|
|
|
|
|
|
void ValidPathInfo::sign(const Store & store, const SecretKey & secretKey)
|
|
{
|
|
sigs.insert(secretKey.signDetached(fingerprint(store)));
|
|
}
|
|
|
|
bool ValidPathInfo::isContentAddressed(const Store & store) const
|
|
{
|
|
if (! ca) return false;
|
|
|
|
auto caPath = std::visit(overloaded {
|
|
[&](const TextHash & th) {
|
|
return store.makeTextPath(path.name(), th.hash, references);
|
|
},
|
|
[&](const FixedOutputHash & fsh) {
|
|
auto refs = references;
|
|
bool hasSelfReference = false;
|
|
if (refs.count(path)) {
|
|
hasSelfReference = true;
|
|
refs.erase(path);
|
|
}
|
|
return store.makeFixedOutputPath(fsh.method, fsh.hash, path.name(), refs, hasSelfReference);
|
|
}
|
|
}, *ca);
|
|
|
|
bool res = caPath == path;
|
|
|
|
if (!res)
|
|
printError("warning: path '%s' claims to be content-addressed but isn't", store.printStorePath(path));
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
size_t ValidPathInfo::checkSignatures(const Store & store, const PublicKeys & publicKeys) const
|
|
{
|
|
if (isContentAddressed(store)) return maxSigs;
|
|
|
|
size_t good = 0;
|
|
for (auto & sig : sigs)
|
|
if (checkSignature(store, publicKeys, sig))
|
|
good++;
|
|
return good;
|
|
}
|
|
|
|
|
|
bool ValidPathInfo::checkSignature(const Store & store, const PublicKeys & publicKeys, const std::string & sig) const
|
|
{
|
|
return verifyDetached(fingerprint(store), sig, publicKeys);
|
|
}
|
|
|
|
|
|
Strings ValidPathInfo::shortRefs() const
|
|
{
|
|
Strings refs;
|
|
for (auto & r : references)
|
|
refs.push_back(std::string(r.to_string()));
|
|
return refs;
|
|
}
|
|
|
|
|
|
Derivation Store::derivationFromPath(const StorePath & drvPath)
|
|
{
|
|
ensurePath(drvPath);
|
|
return readDerivation(drvPath);
|
|
}
|
|
|
|
Derivation readDerivationCommon(Store& store, const StorePath& drvPath, bool requireValidPath)
|
|
{
|
|
auto accessor = store.getFSAccessor();
|
|
try {
|
|
return parseDerivation(store,
|
|
accessor->readFile(store.printStorePath(drvPath), requireValidPath),
|
|
Derivation::nameFromPath(drvPath));
|
|
} catch (FormatError & e) {
|
|
throw Error("error parsing derivation '%s': %s", store.printStorePath(drvPath), e.msg());
|
|
}
|
|
}
|
|
|
|
Derivation Store::readDerivation(const StorePath & drvPath)
|
|
{ return readDerivationCommon(*this, drvPath, true); }
|
|
|
|
Derivation Store::readInvalidDerivation(const StorePath & drvPath)
|
|
{ return readDerivationCommon(*this, drvPath, false); }
|
|
|
|
}
|
|
|
|
|
|
#include "local-store.hh"
|
|
#include "uds-remote-store.hh"
|
|
|
|
|
|
namespace nix {
|
|
|
|
/* Split URI into protocol+hierarchy part and its parameter set. */
|
|
std::pair<std::string, Store::Params> splitUriAndParams(const std::string & uri_)
|
|
{
|
|
auto uri(uri_);
|
|
Store::Params params;
|
|
auto q = uri.find('?');
|
|
if (q != std::string::npos) {
|
|
params = decodeQuery(uri.substr(q + 1));
|
|
uri = uri_.substr(0, q);
|
|
}
|
|
return {uri, params};
|
|
}
|
|
|
|
static bool isNonUriPath(const std::string & spec) {
|
|
return
|
|
// is not a URL
|
|
spec.find("://") == std::string::npos
|
|
// Has at least one path separator, and so isn't a single word that
|
|
// might be special like "auto"
|
|
&& spec.find("/") != std::string::npos;
|
|
}
|
|
|
|
std::shared_ptr<Store> openFromNonUri(const std::string & uri, const Store::Params & params)
|
|
{
|
|
if (uri == "" || uri == "auto") {
|
|
auto stateDir = get(params, "state").value_or(settings.nixStateDir);
|
|
if (access(stateDir.c_str(), R_OK | W_OK) == 0)
|
|
return std::make_shared<LocalStore>(params);
|
|
else if (pathExists(settings.nixDaemonSocketFile))
|
|
return std::make_shared<UDSRemoteStore>(params);
|
|
else
|
|
return std::make_shared<LocalStore>(params);
|
|
} else if (uri == "daemon") {
|
|
return std::make_shared<UDSRemoteStore>(params);
|
|
} else if (uri == "local") {
|
|
return std::make_shared<LocalStore>(params);
|
|
} else if (isNonUriPath(uri)) {
|
|
Store::Params params2 = params;
|
|
params2["root"] = absPath(uri);
|
|
return std::make_shared<LocalStore>(params2);
|
|
} else {
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
// The `parseURL` function supports both IPv6 URIs as defined in
|
|
// RFC2732, but also pure addresses. The latter one is needed here to
|
|
// connect to a remote store via SSH (it's possible to do e.g. `ssh root@::1`).
|
|
//
|
|
// This function now ensures that a usable connection string is available:
|
|
// * If the store to be opened is not an SSH store, nothing will be done.
|
|
// * If the URL looks like `root@[::1]` (which is allowed by the URL parser and probably
|
|
// needed to pass further flags), it
|
|
// will be transformed into `root@::1` for SSH (same for `[::1]` -> `::1`).
|
|
// * If the URL looks like `root@::1` it will be left as-is.
|
|
// * In any other case, the string will be left as-is.
|
|
static std::string extractConnStr(const std::string &proto, const std::string &connStr)
|
|
{
|
|
if (proto.rfind("ssh") != std::string::npos) {
|
|
std::smatch result;
|
|
std::regex v6AddrRegex("^((.*)@)?\\[(.*)\\]$");
|
|
|
|
if (std::regex_match(connStr, result, v6AddrRegex)) {
|
|
if (result[1].matched) {
|
|
return result.str(1) + result.str(3);
|
|
}
|
|
return result.str(3);
|
|
}
|
|
}
|
|
|
|
return connStr;
|
|
}
|
|
|
|
ref<Store> openStore(const std::string & uri_,
|
|
const Store::Params & extraParams)
|
|
{
|
|
auto params = extraParams;
|
|
try {
|
|
auto parsedUri = parseURL(uri_);
|
|
params.insert(parsedUri.query.begin(), parsedUri.query.end());
|
|
|
|
auto baseURI = extractConnStr(
|
|
parsedUri.scheme,
|
|
parsedUri.authority.value_or("") + parsedUri.path
|
|
);
|
|
|
|
for (auto implem : *Implementations::registered) {
|
|
if (implem.uriSchemes.count(parsedUri.scheme)) {
|
|
auto store = implem.create(parsedUri.scheme, baseURI, params);
|
|
if (store) {
|
|
store->init();
|
|
store->warnUnknownSettings();
|
|
return ref<Store>(store);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
catch (BadURL &) {
|
|
auto [uri, uriParams] = splitUriAndParams(uri_);
|
|
params.insert(uriParams.begin(), uriParams.end());
|
|
|
|
if (auto store = openFromNonUri(uri, params)) {
|
|
store->warnUnknownSettings();
|
|
return ref<Store>(store);
|
|
}
|
|
}
|
|
|
|
throw Error("don't know how to open Nix store '%s'", uri_);
|
|
}
|
|
|
|
std::list<ref<Store>> getDefaultSubstituters()
|
|
{
|
|
static auto stores([]() {
|
|
std::list<ref<Store>> stores;
|
|
|
|
StringSet done;
|
|
|
|
auto addStore = [&](const std::string & uri) {
|
|
if (!done.insert(uri).second) return;
|
|
try {
|
|
stores.push_back(openStore(uri));
|
|
} catch (Error & e) {
|
|
logWarning(e.info());
|
|
}
|
|
};
|
|
|
|
for (auto uri : settings.substituters.get())
|
|
addStore(uri);
|
|
|
|
stores.sort([](ref<Store> & a, ref<Store> & b) {
|
|
return a->priority < b->priority;
|
|
});
|
|
|
|
return stores;
|
|
} ());
|
|
|
|
return stores;
|
|
}
|
|
|
|
std::vector<StoreFactory> * Implementations::registered = 0;
|
|
|
|
}
|