Struct Transaction 

pub struct Transaction {

    pub id: TxnId,
    pub state: TxnState,
    pub lease: Lease,
    pub base_source: Option<Hash>,
    pub staged_source: Option<Hash>,
    pub candidate_nar: Option<Hash>,
    pub base_override: Option<Hash>,
    pub candidate_override: Option<Hash>,
    pub gc_root: Option<String>,
    pub recovery: RecoveryStrategy,
    pub transition: Transition,
    pub facts: DerivedFacts,
    pub base: GenerationId,
    pub candidate: Option<(GenerationId, StorePath)>,
    pub policy: PolicyVersion,
    pub approval: Option<ApprovalToken>,
    pub snapshot: Option<SnapshotId>,
    pub expected: Expectation,
    pub started: Timestamp,
    pub deadline: Timestamp,
    pub revert_to: GenerationId,
    pub prior_driver: Option<DriverRef>,
    pub check: CheckContext,
    pub prepared_again_from: Option<TxnId>,
}

Fields

id: TxnId

state: TxnState

lease: Lease

base_source: Option<Hash>

NAR hash of the owner’s source with the BASE override, at Prepared (§9).

staged_source: Option<Hash>

NAR hash of the candidate tree actually evaluated and built (§9).

candidate_nar: Option<Hash>

The candidate store path’s NAR hash, as the store reported it when it was built; verify_candidate checks the path against it (§9 step 3, C6). None for a generation not built by this transaction.

base_override: Option<Hash>

candidate_override: Option<Hash>

gc_root: Option<String>

/nix/var/nix/gcroots/planarian/builds/<staged_source>, adopted at Prepared (I3).

recovery: RecoveryStrategy

transition: Transition

facts: DerivedFacts

base: GenerationId

candidate: Option<(GenerationId, StorePath)>

policy: PolicyVersion

approval: Option<ApprovalToken>

snapshot: Option<SnapshotId>

expected: Expectation

started: Timestamp

deadline: Timestamp

The watchdog acts after this.

revert_to: GenerationId

Fixed at Prepared; authorized with the transaction.

prior_driver: Option<DriverRef>

For BindDriver: the driver bound at Prepared, rebound on revert (§12 execution table). Not in §8 (G12).

check: CheckContext

What the probe check needs, journaled so the watchdog can run it alone.

prepared_again_from: Option<TxnId>

§12f: the withdrawn transaction this one prepares again (from its proposal). Absent in records from before it.

Trait Implementations

impl Clone for Transaction

fn clone(&self) -> Transaction

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Transaction

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Transaction

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Transaction

fn eq(&self, other: &Transaction) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Transaction

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for Transaction

impl StructuralPartialEq for Transaction