diff options
Diffstat (limited to 'tvix')
| -rw-r--r-- | tvix/Cargo.lock | 1 | ||||
| -rw-r--r-- | tvix/nix-compat/src/store_path/mod.rs | 28 |
2 files changed, 18 insertions, 11 deletions
diff --git a/tvix/Cargo.lock b/tvix/Cargo.lock index cb476143b014..9c2e464a6da4 100644 --- a/tvix/Cargo.lock +++ b/tvix/Cargo.lock @@ -2708,7 +2708,6 @@ dependencies = [ "prost", "prost-build", "rayon", - "serde_json", "sha2 0.10.6", "sled", "tempfile", diff --git a/tvix/nix-compat/src/store_path/mod.rs b/tvix/nix-compat/src/store_path/mod.rs index 7dce1e578d06..46c3291c44ce 100644 --- a/tvix/nix-compat/src/store_path/mod.rs +++ b/tvix/nix-compat/src/store_path/mod.rs @@ -44,14 +44,15 @@ impl From<NameError> for Error { /// Represents a path in the Nix store (a direct child of [STORE_DIR]). /// -/// It starts with a digest (20 bytes), [crate::nixbase32]-encoded, -/// followed by a `-`, and ends with a `name`, which is a string, consisting only of ASCCI -/// alphanumeric characters, or one of the following characters: `-`, `_`, `.`, -/// `+`, `?`, `=`. -/// +/// It consists of a digest (20 bytes), and a name, which is a string. +/// The name may only contain ASCII alphanumeric, or one of the following +/// characters: `-`, `_`, `.`, `+`, `?`, `=`. /// The name is usually used to describe the pname and version of a package. -/// Derivations paths can also be represented as store paths, they end -/// with .drv. +/// Derivation paths can also be represented as store paths, their names just +/// end with the `.drv` prefix. +/// +/// A [StorePath] does not encode any additional subpath "inside" the store +/// path. #[derive(Clone, Debug, PartialEq, Eq)] pub struct StorePath { pub digest: [u8; DIGEST_SIZE], @@ -59,6 +60,8 @@ pub struct StorePath { } impl StorePath { + /// Construct a [StorePath] by passing the `$digest-$name` string + /// that comes after [STORE_DIR_WITH_SLASH]. pub fn from_string(s: &str) -> Result<StorePath, Error> { // the whole string needs to be at least: // @@ -87,7 +90,8 @@ impl StorePath { } /// Construct a [StorePath] from an absolute store path string. - /// That is a string starting with the store prefix (/nix/store) + /// This is equivalent to calling [StorePath::from_string], but stripping + /// the [STORE_DIR_WITH_SLASH] prefix before. pub fn from_absolute_path(s: &str) -> Result<StorePath, Error> { match s.strip_prefix(STORE_DIR_WITH_SLASH) { Some(s_stripped) => Self::from_string(s_stripped), @@ -96,9 +100,10 @@ impl StorePath { } /// Converts the [StorePath] to an absolute store path string. - /// That is a string starting with the store prefix (/nix/store) + /// That is just the string representation, prefixed with the store prefix + /// ([STORE_DIR_WITH_SLASH]), pub fn to_absolute_path(&self) -> String { - format!("{}/{}", STORE_DIR, self) + format!("{}{}", STORE_DIR_WITH_SLASH, self) } /// Checks a given &str to match the restrictions for store path names. @@ -123,6 +128,9 @@ impl StorePath { } impl fmt::Display for StorePath { + /// The string representation of a store path starts with a digest (20 + /// bytes), [crate::nixbase32]-encoded, followed by a `-`, + /// and ends with the name. fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { write!(f, "{}-{}", nixbase32::encode(&self.digest), self.name) } |