Fix some change detection issues on server reloads

* Fix change detection when .GetPage/site.GetPage is used from shortcode
* Fix stale content for GetPage results with short name lookups on server reloads

Fixes #7623
Fixes #7624
Fixes #7625

resources/page/page.go

@@ -18,8 +18,11 @@ package page
 import (
 	"html/template"
 
+	"github.com/gohugoio/hugo/identity"
+
 	"github.com/bep/gitmap"
 	"github.com/gohugoio/hugo/config"
+	"github.com/gohugoio/hugo/tpl"
 
 	"github.com/gohugoio/hugo/common/hugo"
 	"github.com/gohugoio/hugo/common/maps"
@@ -97,6 +100,9 @@ type GetPageProvider interface {
 	// This will return nil when no page could be found, and will return
 	// an error if the ref is ambiguous.
 	GetPage(ref string) (Page, error)
+
+	// GetPageWithTemplateInfo is for internal use only.
+	GetPageWithTemplateInfo(info tpl.Info, ref string) (Page, error)
 }
 
 // GitInfoProvider provides Git info.
@@ -260,6 +266,9 @@ type PageWithoutContent interface {
 	// e.g. GetTerms("categories")
 	GetTerms(taxonomy string) Pages
 
+	// Used in change/dependency tracking.
+	identity.Provider
+
 	DeprecatedWarningPageMethods
 }
 

resources/page/page_nop.go

@@ -19,7 +19,10 @@ import (
 	"html/template"
 	"time"
 
+	"github.com/gohugoio/hugo/identity"
+
 	"github.com/gohugoio/hugo/hugofs/files"
+	"github.com/gohugoio/hugo/tpl"
 
 	"github.com/gohugoio/hugo/hugofs"
 
@@ -170,6 +173,10 @@ func (p *nopPage) GetPage(ref string) (Page, error) {
 	return nil, nil
 }
 
+func (p *nopPage) GetPageWithTemplateInfo(info tpl.Info, ref string) (Page, error) {
+	return nil, nil
+}
+
 func (p *nopPage) GetParam(key string) interface{} {
 	return nil
 }
@@ -484,3 +491,7 @@ func (p *nopPage) Weight() int {
 func (p *nopPage) WordCount() int {
 	return 0
 }
+
+func (p *nopPage) GetIdentity() identity.Identity {
+	return identity.NewPathIdentity("content", "foo/bar.md")
+}

resources/page/testhelpers_test.go

@@ -20,6 +20,8 @@ import (
 	"time"
 
 	"github.com/gohugoio/hugo/hugofs/files"
+	"github.com/gohugoio/hugo/identity"
+	"github.com/gohugoio/hugo/tpl"
 
 	"github.com/gohugoio/hugo/modules"
 
@@ -218,6 +220,10 @@ func (p *testPage) GetPage(ref string) (Page, error) {
 	panic("not implemented")
 }
 
+func (p *testPage) GetPageWithTemplateInfo(info tpl.Info, ref string) (Page, error) {
+	panic("not implemented")
+}
+
 func (p *testPage) GetParam(key string) interface{} {
 	panic("not implemented")
 }
@@ -565,6 +571,10 @@ func (p *testPage) WordCount() int {
 	panic("not implemented")
 }
 
+func (p *testPage) GetIdentity() identity.Identity {
+	panic("not implemented")
+}
+
 func createTestPages(num int) Pages {
 	pages := make(Pages, num)