def env.of

shake@0.7.0.0 · src/cli.bend:1572

import Base

1572# the env value of an env var: its first pair's value, when that is not empty
1573def env.of(ev: Maybe<&2, String>, vars: List<&2, Var>) -> Maybe<&2, String>:
1574  match ev:
1575    case None{}:
1576      None{}
1577    case Some{+var}:
1578      env.full(env.get(vars, var))