feat: add license info to js, for LibreJS compatibility

[piperswe]

LibreJS is a browser extension developed by GNU which ensures only Free (libre) JavaScript is run. To determine whether given JavaScript is Free, LibreJS consults metadata included in the JavaScript file. Since Miniflux is Free Software, getting its JavaScript to work when LibreJS is installed is just a matter of adding license metadata to the returned JavaScript source.

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[fguillot]

It would be more appropriate to implement this feature in the minifier that run at startup time.

v2/internal/ui/static/static.go

Lines 131 to 137 in 770cc1d

	var prefixes = map[string]string{
	"app": "(function(){'use strict';",
	}
	var suffixes = map[string]string{
	"app": "})();",
	}

[piperswe]

It would be more appropriate to implement this feature in the minifier that run at startup time.

I would agree, but showJavascript injects OFFLINE_URL before the minified JavaScript so it wouldn't be under the license header (and therefore would be stripped by LibreJS).

v2/internal/ui/static_javascript.go

Lines 33 to 36 in d94b2f6

	if filename == "service-worker" {
	variables := fmt.Sprintf(`const OFFLINE_URL=%q;`, route.Path(h.router, "offline"))
	contents = append([]byte(variables), contents...)
	}

[fguillot]

I would agree, but showJavascript injects OFFLINE_URL before the minified JavaScript so it wouldn't be under the license header (and therefore would be stripped by LibreJS).

Good catch