Function pass_exit_code 

pub fn pass_exit_code(events: &[PolicyEvent], end: StageEnd) -> i32

What: The exit code of a pass that did not reach Git, from its events and its ending. &[PolicyEvent] borrows the events of every stage of the pass. Why: 0 means clean or warnings only, 1 means an error finding, a fixed-transform rejection or a pending correction, and 2 means the pass could not decide.

In TS you’d write (pseudocode):

const exitCode = !complete ? 2 : (hasError || patchProposed) ? 1 : 0;