Add a option to duplicate non-page (e.g. images) resources across lan…

…guages

Which will be default behaviour for all other than Goldmark, for which there is a config option:

```
[markup.goldmark]
duplicateResourceFiles = true
```

Fixes #11904

common/paths/pathparser.go

@@ -361,6 +361,15 @@ func (p *Path) PathNoIdentifier() string {
 	return p.base(false, false)
 }
 
+// PathRel returns the path relativeto the given owner.
+func (p *Path) PathRel(owner *Path) string {
+	ob := owner.Base()
+	if !strings.HasSuffix(ob, "/") {
+		ob += "/"
+	}
+	return strings.TrimPrefix(p.Path(), ob)
+}
+
 // BaseRel returns the base path relative to the given owner.
 func (p *Path) BaseRel(owner *Path) string {
 	ob := owner.Base()
@@ -378,6 +387,11 @@ func (p *Path) Base() string {
 	return p.base(!p.isContentPage(), p.IsBundle())
 }
 
+// BaseNoLeadingSlash returns the base path without the leading slash.
+func (p *Path) BaseNoLeadingSlash() string {
+	return p.Base()[1:]
+}
+
 func (p *Path) base(preserveExt, isBundle bool) string {
 	if len(p.identifiers) == 0 {
 		return p.norm(p.s)

common/paths/pathparser_test.go

@@ -121,6 +121,7 @@ func TestParse(t *testing.T) {
 			func(c *qt.C, p *Path) {
 				c.Assert(p.Name(), qt.Equals, "b.md")
 				c.Assert(p.Base(), qt.Equals, "/a/b")
+				c.Assert(p.BaseNoLeadingSlash(), qt.Equals, "a/b")
 				c.Assert(p.Section(), qt.Equals, "a")
 				c.Assert(p.BaseNameNoIdentifier(), qt.Equals, "b")
 
@@ -160,6 +161,7 @@ func TestParse(t *testing.T) {
 				c.Assert(p.NameNoLang(), qt.Equals, "b.a.b.txt")
 				c.Assert(p.Identifiers(), qt.DeepEquals, []string{"txt", "no"})
 				c.Assert(p.Base(), qt.Equals, "/a/b.a.b.txt")
+				c.Assert(p.BaseNoLeadingSlash(), qt.Equals, "a/b.a.b.txt")
 				c.Assert(p.PathNoLang(), qt.Equals, "/a/b.a.b.txt")
 				c.Assert(p.Ext(), qt.Equals, "txt")
 				c.Assert(p.PathNoIdentifier(), qt.Equals, "/a/b.a.b")

config/commonConfig.go

@@ -94,7 +94,13 @@ var defaultBuild = BuildConfig{
 
 // BuildConfig holds some build related configuration.
 type BuildConfig struct {
-	UseResourceCacheWhen string // never, fallback, always. Default is fallback
+	// When to use the resource file cache.
+	// One of never, fallback, always. Default is fallback
+	UseResourceCacheWhen string
+
+	// When enabled, will duplicate bundled resource files across languages that
+	// doesn't have a translated version.
+	DuplicateResourceFiles bool
 
 	// When enabled, will collect and write a hugo_stats.json with some build
 	// related aggregated data (e.g. CSS class names).

hugolib/content_map.go

@@ -58,6 +58,19 @@ type resourceSource struct {
 	r resource.Resource
 }
 
+func (r resourceSource) clone() *resourceSource {
+	r.r = nil
+	return &r
+}
+
+func (r *resourceSource) LangIndex() int {
+	if r.r != nil && r.isPage() {
+		return r.r.(*pageState).s.languagei
+	}
+
+	return r.fi.Meta().LangIndex
+}
+
 func (r *resourceSource) MarkStale() {
 	resource.MarkStale(r.r)
 }
@@ -151,16 +164,6 @@ func (m *pageMap) AddFi(fi hugofs.FileMetaInfo) error {
 		commit := tree.Lock(true)
 		defer commit()
 
-		var resources resourceSources
-		n, ok := tree.GetRaw(key)
-
-		if ok {
-			resources = n.(resourceSources)
-		} else {
-			resources = make(resourceSources, len(m.s.h.Sites))
-			tree.Insert(key, resources)
-		}
-
 		r := func() (hugio.ReadSeekCloser, error) {
 			return fim.Meta().Open()
 		}
@@ -184,11 +187,7 @@ func (m *pageMap) AddFi(fi hugofs.FileMetaInfo) error {
 			rs = &resourceSource{path: pi, opener: r, fi: fim}
 		}
 
-		i := fim.Meta().LangIndex
-		if r := resources[i]; r != nil && r.r != nil {
-			resource.MarkStale(r.r)
-		}
-		resources[i] = rs
+		tree.InsertIntoValuesDimension(key, rs)
 
 		return nil
 	}