Function report 

pub fn report(index: &Index, ledger: &Ledger) -> RulesReport

Join every rule of the index with the tree and the ledger, and decide, per rule, what the repository can honestly say.

The git comparison is done once per distinct recorded commit and shared by every rule that recorded against it, as crate::evidence::report does — the two derivations read the same ledger and must not disagree about what a commit’s diff is.

use majordomus_cli::rules::report;
use majordomus_cli::evidence::Ledger;
use majordomus_cli::synthetic::SyntheticRepository;
let repo = SyntheticRepository::small().unwrap();
let ledger = Ledger::load(repo.root()).unwrap();
let r = report(&repo.index().unwrap(), &ledger);
assert_eq!(r.coverage.rules, repo.shape.rules);
assert!(r.satisfied(), "the synthetic rules are advisory and owe no proof");