Documentation
¶
Overview ¶
Package origin picks a fork's origin from the sessions a store found holding its base, asking the caller's read check (agentsession's WithReadable) only once the store has let go of its own locks: the check is a program's authorizer, which may read the store.
Index ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type Candidates ¶
type Candidates struct {
// Chain is the session the fork's parent_session names, and those
// up its parent_session line, each holding the base, as far as the
// walk got: it stops at a session whose own entries include the base
// or that names no parent, Ends then set, or at one the store does
// not hold or that does not hold the base, Ends unset.
Chain []string
Ends bool
// Owners are the sessions whose own entries include the base, and
// OnPrefix those that hold it on their prefix, each in ID order.
Owners, OnPrefix []string
}
Candidates are the sessions that may be the origin of a fork at a base, gathered by a store under its lock, in the store's order.
func (Candidates) Pick ¶
func (c Candidates) Pick(readable func(string) bool) string
Pick returns the origin among the sessions readable admits, as the store would find it holding none it does not: up the chain while each is admitted, to its end; else the first admitted owner; else the first admitted session holding the base on its prefix. It asks readable in that order, of each session once, and of none after the first it admits, and returns "" when none is admitted.
Source Files