diff options
Diffstat (limited to 'src/libstore/store-api.hh')
| -rw-r--r-- | src/libstore/store-api.hh | 91 |
1 files changed, 59 insertions, 32 deletions
diff --git a/src/libstore/store-api.hh b/src/libstore/store-api.hh index 68c59a9f2922..929c95a0f2f8 100644 --- a/src/libstore/store-api.hh +++ b/src/libstore/store-api.hh @@ -6,6 +6,7 @@ #include "lru-cache.hh" #include "sync.hh" #include "globals.hh" +#include "config.hh" #include <atomic> #include <limits> @@ -17,6 +18,12 @@ namespace nix { +MakeError(SubstError, Error) +MakeError(BuildError, Error) /* denotes a permanent build failure */ +MakeError(InvalidPath, Error) +MakeError(Unsupported, Error) + + struct BasicDerivation; struct Derivation; class FSAccessor; @@ -81,12 +88,7 @@ struct GCResults /* For `gcReturnDead', `gcDeleteDead' and `gcDeleteSpecific', the number of bytes that would be or was freed. */ - unsigned long long bytesFreed; - - GCResults() - { - bytesFreed = 0; - } + unsigned long long bytesFreed = 0; }; @@ -111,9 +113,8 @@ struct ValidPathInfo uint64_t narSize = 0; // 0 = unknown uint64_t id; // internal use only - /* Whether the path is ultimately trusted, that is, it was built - locally or is content-addressable (e.g. added via addToStore() - or the result of a fixed-output derivation). */ + /* Whether the path is ultimately trusted, that is, it's a + derivation output that was built locally. */ bool ultimate = false; StringSet sigs; // note: not necessarily verified @@ -229,13 +230,17 @@ struct BuildResult }; -class Store : public std::enable_shared_from_this<Store> +class Store : public std::enable_shared_from_this<Store>, public Config { public: typedef std::map<std::string, std::string> Params; - const Path storeDir; + const PathSetting storeDir_{this, false, settings.nixStore, + "store", "path to the Nix store"}; + const Path storeDir = storeDir_; + + const Setting<int> pathInfoCacheSize{this, 65536, "path-info-cache-size", "size of the in-memory store path information cache"}; protected: @@ -414,7 +419,7 @@ public: output paths can be created by running the builder, after recursively building any sub-derivations. For inputs that are not derivations, substitute them. */ - virtual void buildPaths(const PathSet & paths, BuildMode buildMode = bmNormal) = 0; + virtual void buildPaths(const PathSet & paths, BuildMode buildMode = bmNormal); /* Build a single non-materialized derivation (i.e. not from an on-disk .drv file). Note that ‘drvPath’ is only used for @@ -564,10 +569,6 @@ public: const Stats & getStats(); - /* Whether this store paths from this store can be imported even - if they lack a signature. */ - virtual bool isTrusted() { return false; } - /* Return the build log of the specified store path, if available, or null otherwise. */ virtual std::shared_ptr<std::string> getBuildLog(const Path & path) @@ -580,19 +581,39 @@ public: state.lock()->pathInfoCache.clear(); } + /* Establish a connection to the store, for store types that have + a notion of connection. Otherwise this is a no-op. */ + virtual void connect() { }; + protected: Stats stats; + /* Unsupported methods. */ + [[noreturn]] void unsupported() + { + throw Unsupported("requested operation is not supported by store ‘%s’", getUri()); + } + }; class LocalFSStore : public virtual Store { public: - const Path rootDir; - const Path stateDir; - const Path logDir; + + // FIXME: the (Store*) cast works around a bug in gcc that causes + // it to emit the call to the Option constructor. Clang works fine + // either way. + const PathSetting rootDir{(Store*) this, true, "", + "root", "directory prefixed to all other paths"}; + const PathSetting stateDir{(Store*) this, false, + rootDir != "" ? rootDir + "/nix/var/nix" : settings.nixStateDir, + "state", "directory where Nix will store state"}; + const PathSetting logDir{(Store*) this, false, + rootDir != "" ? rootDir + "/nix/var/log/nix" : settings.nixLogDir, + "log", "directory where Nix will store state"}; + const static string drvsLogDir; LocalFSStore(const Params & params); @@ -646,23 +667,35 @@ void removeTempRoots(); /* Return a Store object to access the Nix store denoted by ‘uri’ (slight misnomer...). Supported values are: - * ‘direct’: The Nix store in /nix/store and database in + * ‘local’: The Nix store in /nix/store and database in /nix/var/nix/db, accessed directly. * ‘daemon’: The Nix store accessed via a Unix domain socket connection to nix-daemon. + * ‘auto’ or ‘’: Equivalent to ‘local’ or ‘daemon’ depending on + whether the user has write access to the local Nix + store/database. + * ‘file://<path>’: A binary cache stored in <path>. - If ‘uri’ is empty, it defaults to ‘direct’ or ‘daemon’ depending on - whether the user has write access to the local Nix store/database. - set to true *unless* you're going to collect garbage. */ -ref<Store> openStore(const std::string & uri = getEnv("NIX_REMOTE")); + * ‘https://<path>’: A binary cache accessed via HTTP. + + * ‘s3://<path>’: A writable binary cache stored on Amazon's Simple + Storage Service. + + * ‘ssh://[user@]<host>’: A remote Nix store accessed by running + ‘nix-store --serve’ via SSH. -ref<Store> openStore(const std::string & uri, const Store::Params & params); + You can pass parameters to the store implementation by appending + ‘?key=value&key=value&...’ to the URI. +*/ +ref<Store> openStore(const std::string & uri = getEnv("NIX_REMOTE"), + const Store::Params & extraParams = Store::Params()); -void copyPaths(ref<Store> from, ref<Store> to, const PathSet & storePaths, bool substitute = false); +void copyPaths(ref<Store> from, ref<Store> to, const PathSet & storePaths, + bool substitute = false, bool dontCheckSigs = false); enum StoreType { tDaemon, @@ -710,10 +743,4 @@ ValidPathInfo decodeValidPathInfo(std::istream & str, for paths created by makeFixedOutputPath() / addToStore(). */ std::string makeFixedOutputCA(bool recursive, const Hash & hash); - -MakeError(SubstError, Error) -MakeError(BuildError, Error) /* denotes a permanent build failure */ -MakeError(InvalidPath, Error) - - } |