Struct PreflightInput 

pub struct PreflightInput<'a> {

    pub target: &'a Target,
    pub declared: Option<&'a Declared>,
    pub master: &'a dyn DeployApi,
    pub backup: Option<&'a BackupNode<'a>>,
    pub gateway: &'a dyn GatewayApi,
    pub reader: &'a dyn TreeReader,
    pub host: &'a dyn ApplyHost,
    pub touched_files: usize,
    pub touched_paths: &'a [String],
    pub deleted_paths: &'a [String],
    pub hold: &'a HoldModel,
    pub designers: &'a DesignersPolicy,
    pub clock: &'a dyn Clock,
}

What the preflights read.

Fields

target: &'a Target

The target of this run.

declared: Option<&'a Declared>

The declared render of this run: None for a rollback, which renders nothing, so the checks that need the rendered tree are skipped.

master: &'a dyn DeployApi

The master’s deploy surface (mode).

backup: Option<&'a BackupNode<'a>>

The backup node (a read-only handle), when the target has one.

gateway: &'a dyn GatewayApi

The master’s gateway surface (identity, write probe, Designers).

reader: &'a dyn TreeReader

The read half of the master’s host.

host: &'a dyn ApplyHost

The write seam of the master’s host.

touched_files: usize

Files this run writes plus files it deletes.

touched_paths: &'a [String]

The paths this run touches (collection paths, and the ledger key when the ledger is swapped), for the limits a host puts on a path.

deleted_paths: &'a [String]

The collection paths this run deletes from the master (a subset of touched_paths): with the rendered paths, what the backup’s files are compared over after the apply, so backup_read refuses a unit of either that the backup cannot read (WR-02).

hold: &'a HoldModel

The hold the lock will be requested with and its estimates.

designers: &'a DesignersPolicy

What to do about open Designer sessions.

clock: &'a dyn Clock

The monotonic clock the Designer wait is timed by.