Add site.Store and hugo.Store and Shortcode.Store

Closes #13021

common/hugo/hugo.go

@@ -33,6 +33,7 @@ import (
 	"github.com/gohugoio/hugo/common/hcontext"
 	"github.com/gohugoio/hugo/common/hexec"
 	"github.com/gohugoio/hugo/common/loggers"
+	"github.com/gohugoio/hugo/common/maps"
 	"github.com/gohugoio/hugo/hugofs/files"
 
 	"github.com/spf13/afero"
@@ -55,6 +56,8 @@ var (
 	vendorInfo string
 )
 
+var _ maps.StoreProvider = (*HugoInfo)(nil)
+
 // HugoInfo contains information about the current Hugo environment
 type HugoInfo struct {
 	CommitHash string
@@ -72,6 +75,8 @@ type HugoInfo struct {
 	conf ConfigProvider
 	deps []*Dependency
 
+	store *maps.Scratch
+
 	// Context gives access to some of the context scoped variables.
 	Context Context
 }
@@ -116,6 +121,10 @@ func (i HugoInfo) Deps() []*Dependency {
 	return i.deps
 }
 
+func (i HugoInfo) Store() *maps.Scratch {
+	return i.store
+}
+
 // Deprecated: Use hugo.IsMultihost instead.
 func (i HugoInfo) IsMultiHost() bool {
 	Deprecate("hugo.IsMultiHost", "Use hugo.IsMultihost instead.", "v0.124.0")
@@ -185,6 +194,7 @@ func NewInfo(conf ConfigProvider, deps []*Dependency) HugoInfo {
 		Environment: conf.Environment(),
 		conf:        conf,
 		deps:        deps,
+		store:       maps.NewScratch(),
 		GoVersion:   goVersion,
 	}
 }

common/maps/scratch.go

@@ -22,7 +22,13 @@ import (
 	"github.com/gohugoio/hugo/common/math"
 )
 
-// Scratch is a writable context used for stateful operations in Page/Node rendering.
+type StoreProvider interface {
+	// Store returns a Scratch that can be used to store temporary state.
+	// Store is not reset on server rebuilds.
+	Store() *Scratch
+}
+
+// Scratch is a writable context used for stateful build operations
 type Scratch struct {
 	values map[string]any
 	mu     sync.RWMutex