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use crate::derivation::OutputError;
use crate::nixhash::{HashAlgo, NixHashWithMode};
use crate::store_path::StorePath;
use serde::{Deserialize, Serialize};
use serde_json::Map;
#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize)]
pub struct Output {
pub path: String,
#[serde(flatten)]
pub hash_with_mode: Option<NixHashWithMode>,
}
impl<'de> Deserialize<'de> for Output {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: serde::Deserializer<'de>,
{
let fields = Map::deserialize(deserializer)?;
Ok(Self {
path: fields
.get("path")
.ok_or(serde::de::Error::missing_field(
"`path` is missing but required for outputs",
))?
.as_str()
.ok_or(serde::de::Error::invalid_type(
serde::de::Unexpected::Other("certainly not a string"),
&"a string",
))?
.to_owned(),
hash_with_mode: NixHashWithMode::from_map::<D>(&fields)?,
})
}
}
impl Output {
pub fn is_fixed(&self) -> bool {
self.hash_with_mode.is_some()
}
pub fn validate(&self, validate_output_paths: bool) -> Result<(), OutputError> {
if let Some(hash) = &self.hash_with_mode {
match hash {
NixHashWithMode::Flat(h) | NixHashWithMode::Recursive(h) => {
if h.algo() != HashAlgo::Sha1 || h.algo() != HashAlgo::Sha256 {
return Err(OutputError::InvalidHashAlgo(h.algo().to_string()));
}
}
}
}
if validate_output_paths {
if let Err(e) = StorePath::from_absolute_path(self.path.as_bytes()) {
return Err(OutputError::InvalidOutputPath(self.path.to_string(), e));
}
}
Ok(())
}
}
/// This ensures that a potentially valid input addressed
/// output is deserialized as a non-fixed output.
#[test]
fn deserialize_valid_input_addressed_output() {
let json_bytes = r#"
{
"path": "/nix/store/blablabla"
}"#;
let output: Output = serde_json::from_str(json_bytes).expect("must parse");
assert!(!output.is_fixed());
}
/// This ensures that a potentially valid fixed output
/// output deserializes fine as a fixed output.
#[test]
fn deserialize_valid_fixed_output() {
let json_bytes = r#"
{
"path": "/nix/store/blablablabla",
"hash": "08813cbee9903c62be4c5027726a418a300da4500b2d369d3af9286f4815ceba",
"hashAlgo": "r:sha256"
}"#;
let output: Output = serde_json::from_str(json_bytes).expect("must parse");
assert!(output.is_fixed());
}
/// This ensures that parsing an input with the invalid hash encoding
/// will result in a parsing failure.
#[test]
fn deserialize_with_error_invalid_hash_encoding_fixed_output() {
let json_bytes = r#"
{
"path": "/nix/store/blablablabla",
"hash": "IAMNOTVALIDNIXBASE32",
"hashAlgo": "r:sha256"
}"#;
let output: Result<Output, _> = serde_json::from_str(json_bytes);
assert!(output.is_err());
}
/// This ensures that parsing an input with the wrong hash algo
/// will result in a parsing failure.
#[test]
fn deserialize_with_error_invalid_hash_algo_fixed_output() {
let json_bytes = r#"
{
"path": "/nix/store/blablablabla",
"hash": "08813cbee9903c62be4c5027726a418a300da4500b2d369d3af9286f4815ceba",
"hashAlgo": "r:sha1024"
}"#;
let output: Result<Output, _> = serde_json::from_str(json_bytes);
assert!(output.is_err());
}
/// This ensures that parsing an input with the missing hash algo but present hash will result in a
/// parsing failure.
#[test]
fn deserialize_with_error_missing_hash_algo_fixed_output() {
let json_bytes = r#"
{
"path": "/nix/store/blablablabla",
"hash": "08813cbee9903c62be4c5027726a418a300da4500b2d369d3af9286f4815ceba",
}"#;
let output: Result<Output, _> = serde_json::from_str(json_bytes);
assert!(output.is_err());
}
/// This ensures that parsing an input with the missing hash but present hash algo will result in a
/// parsing failure.
#[test]
fn deserialize_with_error_missing_hash_fixed_output() {
let json_bytes = r#"
{
"path": "/nix/store/blablablabla",
"hashAlgo": "r:sha1024"
}"#;
let output: Result<Output, _> = serde_json::from_str(json_bytes);
assert!(output.is_err());
}
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