57 lines
1.6 KiB
C++
57 lines
1.6 KiB
C++
#pragma once
|
||
|
||
#include <variant>
|
||
#include "hash.hh"
|
||
|
||
namespace nix {
|
||
|
||
enum struct FileIngestionMethod : uint8_t {
|
||
Flat = false,
|
||
Recursive = true
|
||
};
|
||
|
||
struct TextHash {
|
||
Hash hash;
|
||
};
|
||
|
||
/// Pair of a hash, and how the file system was ingested
|
||
struct FixedOutputHash {
|
||
FileIngestionMethod method;
|
||
Hash hash;
|
||
std::string printMethodAlgo() const;
|
||
};
|
||
|
||
/*
|
||
We've accumulated several types of content-addressed paths over the years;
|
||
fixed-output derivations support multiple hash algorithms and serialisation
|
||
methods (flat file vs NAR). Thus, ‘ca’ has one of the following forms:
|
||
|
||
* ‘text:sha256:<sha256 hash of file contents>’: For paths
|
||
computed by makeTextPath() / addTextToStore().
|
||
|
||
* ‘fixed:<r?>:<ht>:<h>’: For paths computed by
|
||
makeFixedOutputPath() / addToStore().
|
||
*/
|
||
typedef std::variant<
|
||
TextHash, // for paths computed by makeTextPath() / addTextToStore
|
||
FixedOutputHash // for path computed by makeFixedOutputPath
|
||
> ContentAddress;
|
||
|
||
/* 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);
|
||
|
||
std::string renderContentAddress(ContentAddress ca);
|
||
|
||
std::string renderContentAddress(std::optional<ContentAddress> ca);
|
||
|
||
ContentAddress parseContentAddress(std::string_view rawCa);
|
||
|
||
std::optional<ContentAddress> parseContentAddressOpt(std::string_view rawCaOpt);
|
||
|
||
}
|