Add js.Batch

Fixes #12626
Closes #7499
Closes #9978
Closes #12879
Closes #13113
Fixes #13116

resources/resource_transformers/js/transform.go

@@ -0,0 +1,68 @@
+// Copyright 2024 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package js
+
+import (
+	"io"
+	"path"
+	"path/filepath"
+
+	"github.com/gohugoio/hugo/internal/js/esbuild"
+	"github.com/gohugoio/hugo/media"
+	"github.com/gohugoio/hugo/resources"
+	"github.com/gohugoio/hugo/resources/internal"
+)
+
+type buildTransformation struct {
+	optsm map[string]any
+	c     *Client
+}
+
+func (t *buildTransformation) Key() internal.ResourceTransformationKey {
+	return internal.NewResourceTransformationKey("jsbuild", t.optsm)
+}
+
+func (t *buildTransformation) Transform(ctx *resources.ResourceTransformationCtx) error {
+	ctx.OutMediaType = media.Builtin.JavascriptType
+
+	var opts esbuild.Options
+
+	if t.optsm != nil {
+		optsExt, err := esbuild.DecodeExternalOptions(t.optsm)
+		if err != nil {
+			return err
+		}
+		opts.ExternalOptions = optsExt
+	}
+
+	if opts.TargetPath != "" {
+		ctx.OutPath = opts.TargetPath
+	} else {
+		ctx.ReplaceOutPathExtension(".js")
+	}
+
+	src, err := io.ReadAll(ctx.From)
+	if err != nil {
+		return err
+	}
+
+	opts.SourceDir = filepath.FromSlash(path.Dir(ctx.SourcePath))
+	opts.Contents = string(src)
+	opts.MediaType = ctx.InMediaType
+	opts.Stdin = true
+
+	_, err = t.c.transform(opts, ctx)
+
+	return err
+}