From 0586599fc6020df996c4278230eeea99b9d070cb Mon Sep 17 00:00:00 2001 From: Lukasz Kasprzak Date: Tue, 28 Jul 2026 14:02:54 +0200 Subject: licence: relicense MIT -> AGPL-3.0-or-later lectio was MIT, which let anyone take it closed. The concern is not people selling it -- no licence stops that, and the AGPL does not try to -- but someone building a proprietary product on it and giving nothing back. Plain GPL would leave the obvious hole open: lectio-web is a network service, and hosting is not distribution, so a modified lectio-web could be run as a paid subscription API without ever publishing a line. AGPL section 13 closes exactly that. LICENSE is the verbatim FSF text. README carries the standard notice. Section 13 requires a modified network-reachable version to PROMINENTLY offer its source to the users interacting with it, so the offer ships with the code rather than living only in a file nobody fetches: - GET /source plain text, no template or config dependency, so it answers even when something else is broken - page footers every full page (fragments render inside one) - JSON envelope "source" / "license" - iCal header X-LECTIO-SOURCE / X-LECTIO-LICENSE The feed fields are not redundant: an /api/calendar.json consumer or an .ics subscriber never loads a page, so the footer alone would miss them. config.SourceURL is the single source of truth, and says in its comment that a fork running as a service must repoint it -- an offer that leads to someone else's code is not an offer. Tests pin all of it. This is a licence obligation, not a feature, so it should fail loudly if a later change drops it. --- internal/calfeed/ical.go | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'internal/calfeed/ical.go') diff --git a/internal/calfeed/ical.go b/internal/calfeed/ical.go index bce3710..810847d 100644 --- a/internal/calfeed/ical.go +++ b/internal/calfeed/ical.go @@ -4,6 +4,8 @@ import ( "strconv" "strings" "time" + + "github.com/lukaszkasprzak/lectio/internal/config" ) // icalEscape neutralises RFC-5545 TEXT specials AND all CR/LF, so untrusted @@ -58,6 +60,12 @@ func ICal(form string, days []DayView, stamp time.Time) []byte { add("PRODID:-//lectio//calendar//EN") add("CALSCALE:GREGORIAN") add("METHOD:PUBLISH") + // AGPL-3.0 ยง13 offer for subscribers who only ever see the .ics feed. + // X- properties are the RFC-5545 extension point; unknown ones are + // ignored by clients, so this is inert for consumers and present for + // anyone who looks. + add("X-LECTIO-SOURCE:" + icalEscape(config.SourceURL)) + add("X-LECTIO-LICENSE:" + icalEscape(config.License)) add("X-WR-CALNAME:" + icalEscape(calName(form))) ds := stamp.UTC().Format("20060102T150405Z") for _, d := range days { -- cgit v1.3