Module: DispatchPolicy::Assets

Defined in:

lib/dispatch_policy/assets.rb

Overview

Vendored static assets served by AssetsController. Bodies are read once at boot and the digest is embedded in the URL so the response can be marked ‘Cache-Control: immutable` — bumping the vendored file produces a new digest and the host’s browsers refetch automatically.

To upgrade Turbo (current: 8.0.4), overwrite the file from the same CDN/version pair the rest of the Hotwire ecosystem uses:

curl -fsSL https://cdn.jsdelivr.net/npm/@hotwired/turbo@<VERSION>/dist/turbo.es2017-umd.min.js \
  -o app/assets/javascripts/dispatch_policy/turbo.es2017-umd.min.js

No other code change is required — TURBO_DIGEST is content-addressed.

Constant Summary

JS_ROOT =

Pathname.new(File.expand_path("../../app/assets/javascripts/dispatch_policy", __dir__))

IMAGE_ROOT =

Pathname.new(File.expand_path("../../app/assets/images/dispatch_policy", __dir__))

TURBO_BODY =

JS_ROOT.join("turbo.es2017-umd.min.js").read.freeze

TURBO_DIGEST =

Digest::SHA1.hexdigest(TURBO_BODY)[0, 12].freeze

LOGO_LARGE_BODY =

The “large” mark (≥ 48px) is used in the admin header — three chevrons with the rightmost one carrying state color via ‘currentColor`. The “small” mark (≤ 32px) is used as the SVG favicon, where the lanes get lost at downsampling. Both are themable: wrapping with `style=“color: …”` swaps the state color (ok/info/neutral/warn/error).

IMAGE_ROOT.join("logo-large.svg").read.freeze

LOGO_LARGE_DIGEST =

Digest::SHA1.hexdigest(LOGO_LARGE_BODY)[0, 12].freeze

LOGO_SMALL_BODY =

IMAGE_ROOT.join("logo-small.svg").read.freeze

LOGO_SMALL_DIGEST =

Digest::SHA1.hexdigest(LOGO_SMALL_BODY)[0, 12].freeze