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use crate::derivation::OutputError;
use crate::{nixbase32, store_path::StorePath};
use serde::{Deserialize, Serialize};
#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
pub struct Output {
pub path: String,
#[serde(flatten)]
pub hash: Option<Hash>,
}
#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
pub struct Hash {
#[serde(rename = "hash")]
pub digest: String,
#[serde(rename = "hashAlgo")]
pub algo: String,
}
impl Output {
pub fn is_fixed(&self) -> bool {
self.hash.is_some()
}
pub fn validate(&self, validate_output_paths: bool) -> Result<(), OutputError> {
if let Some(hash) = &self.hash {
// try to decode digest
let result = nixbase32::decode(&hash.digest.as_bytes());
match result {
Err(e) => return Err(OutputError::InvalidHashEncoding(hash.digest.clone(), e)),
Ok(digest) => {
if hash.algo != "sha1" && hash.algo != "sha256" {
return Err(OutputError::InvalidHashAlgo(hash.algo.to_string()));
}
if (hash.algo == "sha1" && digest.len() != 20)
|| (hash.algo == "sha256" && digest.len() != 32)
{
return Err(OutputError::InvalidDigestSizeForAlgo(
digest.len(),
hash.algo.to_string(),
));
}
}
};
}
if validate_output_paths {
if let Err(e) = StorePath::from_absolute_path(&self.path) {
return Err(OutputError::InvalidOutputPath(self.path.to_string(), e));
}
}
Ok(())
}
}
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