1 files changed, 29 insertions, 8 deletions
diff --git a/pkgtools/pkglint/files/category.go b/pkgtools/pkglint/files/category.go
index 1d5f9aae33a..1ddc3da5dca 100644
--- a/pkgtools/pkglint/files/category.go
+++ b/pkgtools/pkglint/files/category.go
@@ -5,7 +5,7 @@ import (
 	"strings"
 )
 
-func CheckdirCategory(dir CurrPath) {
+func CheckdirCategory(dir CurrPath, recurse bool) {
 	if trace.Tracing {
 		defer trace.Call(dir)()
 	}
@@ -48,6 +48,7 @@ func CheckdirCategory(dir CurrPath) {
 
 	var fSubdirs []RelPath
 	var mSubdirs []subdir
+	var recurseInto []CurrPath
 
 	for _, subdir := range getSubdirs(dir) {
 		if dir.JoinNoClean(subdir).JoinNoClean("Makefile").IsFile() {
@@ -96,6 +97,9 @@ func CheckdirCategory(dir CurrPath) {
 			}
 
 			mSubdirs = append(mSubdirs, subdir{sub, mkline})
+			if recurse && !mkline.IsCommentedVarassign() {
+				recurseInto = append(recurseInto, dir.JoinNoClean(sub))
+			}
 
 		} else {
 			if !mkline.IsEmpty() {
@@ -168,13 +172,30 @@ func CheckdirCategory(dir CurrPath) {
 
 	mklines.SaveAutofixChanges()
 
-	if G.Recursive {
-		var recurseInto []CurrPath
-		for _, msub := range mSubdirs {
-			if !msub.line.IsCommentedVarassign() {
-				recurseInto = append(recurseInto, dir.JoinNoClean(msub.name))
+	G.Todo.PushFront(recurseInto...)
+}
+
+func CheckPackageDirCollision(dir CurrPath, pkgdir RelPath) {
+	mklines := LoadMk(dir.JoinNoClean("Makefile").CleanDot(), nil, 0)
+	if mklines == nil {
+		return
+	}
+
+	lowerPkgdir := strings.ToLower(pkgdir.String())
+	mklines.ForEach(func(mkline *MkLine) {
+		if mkline.IsVarassignMaybeCommented() && mkline.Varname() == "SUBDIR" {
+			value := NewPath(mkline.Value())
+			if value.IsAbs() {
+				return
+			}
+			sub := NewRelPath(value)
+			lowerSub := strings.ToLower(sub.String())
+			if lowerSub == lowerPkgdir && sub != pkgdir {
+				// TODO: Merge duplicate code from CheckdirCategory.
+				mkline.Errorf("On case-insensitive file systems, "+
+					"%q is the same as %q.",
+					sub, pkgdir)
 			}
 		}
-		G.Todo.PushFront(recurseInto...)
-	}
+	})
 }