bake: handle root evaluation with available drives for windows entitlement

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

bake/entitlements.go

@@ -319,7 +319,7 @@ func isParentOrEqualPath(p, parent string) bool {
 	if p == parent || parent == "/" {
 		return true
 	}
-	if strings.HasPrefix(p, parent+string(filepath.Separator)) {
+	if strings.HasPrefix(p, filepath.Clean(parent+string(filepath.Separator))) {
 		return true
 	}
 	return false
@@ -441,22 +441,6 @@ func removeCommonPaths(in, common []string) []string {
 	return filtered
 }
 
-func evaluatePaths(in []string) ([]string, error) {
-	out := make([]string, 0, len(in))
-	for _, p := range in {
-		v, err := filepath.Abs(p)
-		if err != nil {
-			return nil, err
-		}
-		v, err = filepath.EvalSymlinks(v)
-		if err != nil {
-			return nil, errors.Wrapf(err, "failed to evaluate path %q", p)
-		}
-		out = append(out, v)
-	}
-	return out, nil
-}
-
 func evaluateToExistingPaths(in map[string]struct{}) (map[string]struct{}, error) {
 	m := make(map[string]struct{}, len(in))
 	for p := range in {

bake/entitlements_unix.go

@@ -0,0 +1,26 @@
+//go:build !windows
+// +build !windows
+
+package bake
+
+import (
+	"path/filepath"
+
+	"github.com/pkg/errors"
+)
+
+func evaluatePaths(in []string) ([]string, error) {
+	out := make([]string, 0, len(in))
+	for _, p := range in {
+		v, err := filepath.Abs(p)
+		if err != nil {
+			return nil, err
+		}
+		v, err = filepath.EvalSymlinks(v)
+		if err != nil {
+			return nil, errors.Wrapf(err, "failed to evaluate path %q", p)
+		}
+		out = append(out, v)
+	}
+	return out, nil
+}

bake/entitlements_windows.go

@@ -0,0 +1,39 @@
+package bake
+
+import (
+	"os"
+	"path/filepath"
+
+	"github.com/pkg/errors"
+)
+
+func evaluatePaths(in []string) ([]string, error) {
+	out := make([]string, 0, len(in))
+	for _, p := range in {
+		if p == "/" {
+			out = append(out, getAllVolumes()...)
+			continue
+		}
+		v, err := filepath.Abs(p)
+		if err != nil {
+			return nil, err
+		}
+		v, err = filepath.EvalSymlinks(v)
+		if err != nil {
+			return nil, errors.Wrapf(err, "failed to evaluate path %q", p)
+		}
+		out = append(out, v)
+	}
+	return out, nil
+}
+
+func getAllVolumes() []string {
+	var volumes []string
+	for _, drive := range "ABCDEFGHIJKLMNOPQRSTUVWXYZ" {
+		p := string(drive) + ":" + string(filepath.Separator)
+		if _, err := os.Stat(p); !os.IsNotExist(err) {
+			volumes = append(volumes, p)
+		}
+	}
+	return volumes
+}