Embed Katex as Wasm

See gohugoio#11927

deps/deps.go

@@ -23,6 +23,7 @@ import (
 	"github.com/gohugoio/hugo/helpers"
 	"github.com/gohugoio/hugo/hugofs"
 	"github.com/gohugoio/hugo/identity"
+	"github.com/gohugoio/hugo/internal/warpc"
 	"github.com/gohugoio/hugo/media"
 	"github.com/gohugoio/hugo/resources/page"
 	"github.com/gohugoio/hugo/resources/postpub"
@@ -93,6 +94,10 @@ type Deps struct {
 	// This is common/global for all sites.
 	BuildState *BuildState
 
+	// Holds RPC dispatchers for Katex etc.
+	// TODO(bep) rethink this re. a plugin setup, but this will have to do for now.
+	WasmDispatchers *warpc.Dispatchers
+
 	*globalErrHandler
 }
 
@@ -343,6 +348,9 @@ func (d *Deps) Close() error {
 	if d.MemCache != nil {
 		d.MemCache.Stop()
 	}
+	if d.WasmDispatchers != nil {
+		d.WasmDispatchers.Close()
+	}
 	return d.BuildClosers.Close()
 }
 

hugolib/site_new.go

@@ -34,6 +34,7 @@ import (
 	"github.com/gohugoio/hugo/hugolib/doctree"
 	"github.com/gohugoio/hugo/hugolib/pagesfromdata"
 	"github.com/gohugoio/hugo/identity"
+	"github.com/gohugoio/hugo/internal/warpc"
 	"github.com/gohugoio/hugo/langs"
 	"github.com/gohugoio/hugo/langs/i18n"
 	"github.com/gohugoio/hugo/lazy"
@@ -157,6 +158,12 @@ func NewHugoSites(cfg deps.DepsCfg) (*HugoSites, error) {
 		MemCache:            memCache,
 		TemplateProvider:    tplimpl.DefaultTemplateProvider,
 		TranslationProvider: i18n.NewTranslationProvider(),
+		WasmDispatchers: warpc.AllDispatchers(
+			warpc.Options{
+				// Katex is relatively slow.
+				PoolSize: 8,
+			},
+		),
 	}
 
 	if err := firstSiteDeps.Init(); err != nil {