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add more documentation, examples with tests to illustrate reusable components

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Mechiel Lukkien
2023-12-12 15:47:26 +01:00
parent 810cbdc61d
commit d1b66035a9
40 changed files with 973 additions and 119 deletions
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8
updates/updates.go
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@ -173,6 +173,14 @@ func FetchChangelog(ctx context.Context, elog *slog.Logger, baseURL string, base
// Check checks for an updated version through DNS and fetches a
// changelog if so.
//
// Check looks up a TXT record at _updates.<domain>, and parses the record. If the
// latest version is more recent than lastKnown, an update is available, and Check
// will fetch the signed changes since lastKnown, verify the signatures, and
// return the changelog. The latest version and parsed DNS record is returned
// regardless of whether a new version was found. A non-nil changelog is only
// returned when a new version was found and a changelog could be fetched and
// verified.
func Check(ctx context.Context, elog *slog.Logger, resolver dns.Resolver, domain dns.Domain, lastKnown Version, changelogBaseURL string, pubKey []byte) (rversion Version, rrecord *Record, changelog *Changelog, rerr error) {
log := mlog.New("updates", elog)
start := time.Now()