mirror of
https://github.com/privatevoid-net/nix-super.git
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127 lines
3.8 KiB
C++
127 lines
3.8 KiB
C++
#pragma once
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#include "path.hh"
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#include "hash.hh"
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#include "content-address.hh"
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#include "globals.hh"
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#include "config.hh"
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#include <map>
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#include <string>
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#include <variant>
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namespace nix {
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MakeError(BadStorePath, Error);
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struct StoreDirConfig : public Config
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{
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using Config::Config;
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StoreDirConfig() = delete;
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virtual ~StoreDirConfig() = default;
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const PathSetting storeDir_{this, settings.nixStore,
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"store",
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R"(
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Logical location of the Nix store, usually
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`/nix/store`. Note that you can only copy store paths
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between stores if they have the same `store` setting.
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)"};
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const Path storeDir = storeDir_;
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// pure methods
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StorePath parseStorePath(std::string_view path) const;
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std::optional<StorePath> maybeParseStorePath(std::string_view path) const;
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std::string printStorePath(const StorePath & path) const;
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/**
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* Deprecated
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*
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* \todo remove
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*/
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StorePathSet parseStorePathSet(const PathSet & paths) const;
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PathSet printStorePathSet(const StorePathSet & path) const;
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/**
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* Display a set of paths in human-readable form (i.e., between quotes
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* and separated by commas).
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*/
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std::string showPaths(const StorePathSet & paths);
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/**
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* @return true if ‘path’ is in the Nix store (but not the Nix
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* store itself).
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*/
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bool isInStore(PathView path) const;
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/**
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* @return true if ‘path’ is a store path, i.e. a direct child of the
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* Nix store.
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*/
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bool isStorePath(std::string_view path) const;
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/**
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* Split a path like /nix/store/<hash>-<name>/<bla> into
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* /nix/store/<hash>-<name> and /<bla>.
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*/
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std::pair<StorePath, Path> toStorePath(PathView path) const;
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/**
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* Constructs a unique store path name.
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*/
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StorePath makeStorePath(std::string_view type,
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std::string_view hash, std::string_view name) const;
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StorePath makeStorePath(std::string_view type,
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const Hash & hash, std::string_view name) const;
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StorePath makeOutputPath(std::string_view id,
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const Hash & hash, std::string_view name) const;
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StorePath makeFixedOutputPath(std::string_view name, const FixedOutputInfo & info) const;
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StorePath makeTextPath(std::string_view name, const TextInfo & info) const;
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StorePath makeFixedOutputPathFromCA(std::string_view name, const ContentAddressWithReferences & ca) const;
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/**
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* Read-only variant of addToStoreFromDump(). It returns the store
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* path to which a NAR or flat file would be written.
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*/
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std::pair<StorePath, Hash> computeStorePathFromDump(
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Source & dump,
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std::string_view name,
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FileIngestionMethod method = FileIngestionMethod::Recursive,
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HashType hashAlgo = htSHA256,
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const StorePathSet & references = {}) const;
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/**
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* Preparatory part of addTextToStore().
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*
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* !!! Computation of the path should take the references given to
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* addTextToStore() into account, otherwise we have a (relatively
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* minor) security hole: a caller can register a source file with
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* bogus references. If there are too many references, the path may
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* not be garbage collected when it has to be (not really a problem,
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* the caller could create a root anyway), or it may be garbage
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* collected when it shouldn't be (more serious).
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*
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* Hashing the references would solve this (bogus references would
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* simply yield a different store path, so other users wouldn't be
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* affected), but it has some backwards compatibility issues (the
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* hashing scheme changes), so I'm not doing that for now.
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*/
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StorePath 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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}
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