nix-super/src/libstore/file-hash.hh

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2020-06-02 00:32:27 +03:00
#pragma once
#include "hash.hh"
namespace nix {
enum struct FileIngestionMethod : uint8_t {
Flat = false,
Recursive = true
};
/// Pair of a hash, and how the file system was ingested
struct FileSystemHash {
FileIngestionMethod method;
Hash hash;
FileSystemHash(FileIngestionMethod method, Hash hash)
: method(std::move(method))
, hash(std::move(hash))
{ }
FileSystemHash(const FileSystemHash &) = default;
FileSystemHash(FileSystemHash &&) = default;
FileSystemHash & operator = (const FileSystemHash &) = default;
std::string printMethodAlgo() const;
};
/* Compute the prefix to the hash algorithm which indicates how the files were
ingested. */
std::string makeFileIngestionPrefix(const FileIngestionMethod m);
/* Compute the content-addressability assertion (ValidPathInfo::ca)
for paths created by makeFixedOutputPath() / addToStore(). */
std::string makeFixedOutputCA(FileIngestionMethod method, const Hash & hash);
}