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Merge pull request #9815 from NixOS/nix-hash-path
`nix hash path`, text hashing for `nix store add`, and preparatory refactors
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#include "misc-store-flags.hh" | ||
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namespace nix::flag | ||
{ | ||
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static void hashFormatCompleter(AddCompletions & completions, size_t index, std::string_view prefix) | ||
{ | ||
for (auto & format : hashFormats) { | ||
if (hasPrefix(format, prefix)) { | ||
completions.add(format); | ||
} | ||
} | ||
} | ||
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Args::Flag hashFormatWithDefault(std::string && longName, HashFormat * hf) | ||
{ | ||
assert(*hf == nix::HashFormat::SRI); | ||
return Args::Flag { | ||
.longName = std::move(longName), | ||
.description = "Hash format (`base16`, `nix32`, `base64`, `sri`). Default: `sri`.", | ||
.labels = {"hash-format"}, | ||
.handler = {[hf](std::string s) { | ||
*hf = parseHashFormat(s); | ||
}}, | ||
.completer = hashFormatCompleter, | ||
}; | ||
} | ||
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Args::Flag hashFormatOpt(std::string && longName, std::optional<HashFormat> * ohf) | ||
{ | ||
return Args::Flag { | ||
.longName = std::move(longName), | ||
.description = "Hash format (`base16`, `nix32`, `base64`, `sri`).", | ||
.labels = {"hash-format"}, | ||
.handler = {[ohf](std::string s) { | ||
*ohf = std::optional<HashFormat>{parseHashFormat(s)}; | ||
}}, | ||
.completer = hashFormatCompleter, | ||
}; | ||
} | ||
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static void hashAlgoCompleter(AddCompletions & completions, size_t index, std::string_view prefix) | ||
{ | ||
for (auto & algo : hashAlgorithms) | ||
if (hasPrefix(algo, prefix)) | ||
completions.add(algo); | ||
} | ||
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Args::Flag hashAlgo(std::string && longName, HashAlgorithm * ha) | ||
{ | ||
return Args::Flag { | ||
.longName = std::move(longName), | ||
.description = "Hash algorithm (`md5`, `sha1`, `sha256`, or `sha512`).", | ||
.labels = {"hash-algo"}, | ||
.handler = {[ha](std::string s) { | ||
*ha = parseHashAlgo(s); | ||
}}, | ||
.completer = hashAlgoCompleter, | ||
}; | ||
} | ||
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Args::Flag hashAlgoOpt(std::string && longName, std::optional<HashAlgorithm> * oha) | ||
{ | ||
return Args::Flag { | ||
.longName = std::move(longName), | ||
.description = "Hash algorithm (`md5`, `sha1`, `sha256`, or `sha512`). Can be omitted for SRI hashes.", | ||
.labels = {"hash-algo"}, | ||
.handler = {[oha](std::string s) { | ||
*oha = std::optional<HashAlgorithm>{parseHashAlgo(s)}; | ||
}}, | ||
.completer = hashAlgoCompleter, | ||
}; | ||
} | ||
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Args::Flag fileIngestionMethod(FileIngestionMethod * method) | ||
{ | ||
return Args::Flag { | ||
.longName = "mode", | ||
// FIXME indentation carefully made for context, this is messed up. | ||
.description = R"( | ||
How to compute the hash of the input. | ||
One of: | ||
- `nar` (the default): Serialises the input as an archive (following the [_Nix Archive Format_](https://edolstra.github.io/pubs/phd-thesis.pdf#page=101)) and passes that to the hash function. | ||
- `flat`: Assumes that the input is a single file and directly passes it to the hash function; | ||
)", | ||
.labels = {"file-ingestion-method"}, | ||
.handler = {[method](std::string s) { | ||
*method = parseFileIngestionMethod(s); | ||
}}, | ||
}; | ||
} | ||
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Args::Flag contentAddressMethod(ContentAddressMethod * method) | ||
{ | ||
return Args::Flag { | ||
.longName = "mode", | ||
// FIXME indentation carefully made for context, this is messed up. | ||
.description = R"( | ||
How to compute the content-address of the store object. | ||
One of: | ||
- `nar` (the default): Serialises the input as an archive (following the [_Nix Archive Format_](https://edolstra.github.io/pubs/phd-thesis.pdf#page=101)) and passes that to the hash function. | ||
- `flat`: Assumes that the input is a single file and directly passes it to the hash function; | ||
- `text`: Like `flat`, but used for | ||
[derivations](@docroot@/glossary.md#store-derivation) serialized in store object and | ||
[`builtins.toFile`](@docroot@/language/builtins.html#builtins-toFile). | ||
For advanced use-cases only; | ||
for regular usage prefer `nar` and `flat. | ||
)", | ||
.labels = {"content-address-method"}, | ||
.handler = {[method](std::string s) { | ||
*method = ContentAddressMethod::parse(s); | ||
}}, | ||
}; | ||
} | ||
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} |
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#include "args.hh" | ||
#include "content-address.hh" | ||
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namespace nix::flag { | ||
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Args::Flag hashAlgo(std::string && longName, HashAlgorithm * ha); | ||
static inline Args::Flag hashAlgo(HashAlgorithm * ha) | ||
{ | ||
return hashAlgo("hash-algo", ha); | ||
} | ||
Args::Flag hashAlgoOpt(std::string && longName, std::optional<HashAlgorithm> * oha); | ||
Args::Flag hashFormatWithDefault(std::string && longName, HashFormat * hf); | ||
Args::Flag hashFormatOpt(std::string && longName, std::optional<HashFormat> * ohf); | ||
static inline Args::Flag hashAlgoOpt(std::optional<HashAlgorithm> * oha) | ||
{ | ||
return hashAlgoOpt("hash-algo", oha); | ||
} | ||
Args::Flag fileIngestionMethod(FileIngestionMethod * method); | ||
Args::Flag contentAddressMethod(ContentAddressMethod * method); | ||
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} |
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