mirror of
https://github.com/NixOS/nix.git
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043135a848
In addition: - Take the opportunity to add a bunch more missing hyperlinks, too. - Remove some glossary entries that are now subsumed by dedicated pages. We used to not be able to do this without breaking link fragments, but now we can, so pick up where we left off. Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
98 lines
1.9 KiB
C++
98 lines
1.9 KiB
C++
#pragma once
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///@file
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#include <string_view>
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#include "types.hh"
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namespace nix {
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struct Hash;
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/**
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* \ref StorePath "Store path" is the fundamental reference type of Nix.
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* A store paths refers to a Store object.
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*
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* See store/store-path.html for more information on a
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* conceptual level.
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*/
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class StorePath
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{
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std::string baseName;
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public:
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/**
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* Size of the hash part of store paths, in base-32 characters.
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*/
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constexpr static size_t HashLen = 32; // i.e. 160 bits
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constexpr static size_t MaxPathLen = 211;
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StorePath() = delete;
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StorePath(std::string_view baseName);
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StorePath(const Hash & hash, std::string_view name);
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std::string_view to_string() const
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{
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return baseName;
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}
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bool operator < (const StorePath & other) const
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{
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return baseName < other.baseName;
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}
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bool operator == (const StorePath & other) const
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{
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return baseName == other.baseName;
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}
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bool operator != (const StorePath & other) const
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{
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return baseName != other.baseName;
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}
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/**
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* Check whether a file name ends with the extension for derivations.
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*/
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bool isDerivation() const;
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std::string_view name() const
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{
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return std::string_view(baseName).substr(HashLen + 1);
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}
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std::string_view hashPart() const
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{
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return std::string_view(baseName).substr(0, HashLen);
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}
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static StorePath dummy;
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static StorePath random(std::string_view name);
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};
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typedef std::set<StorePath> StorePathSet;
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typedef std::vector<StorePath> StorePaths;
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/**
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* The file extension of \ref Derivation derivations when serialized
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* into store objects.
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*/
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const std::string drvExtension = ".drv";
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}
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namespace std {
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template<> struct hash<nix::StorePath> {
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std::size_t operator()(const nix::StorePath & path) const noexcept
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{
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return * (std::size_t *) path.to_string().data();
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}
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};
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}
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