Remove all darwin specific files and use more generic _unsupported with build tags.

Docker-DCO-1.1-Signed-off-by: Guillaume J. Charmes <guillaume.charmes@docker.com> (github: creack)

utils/fs.go

@@ -24,10 +24,12 @@ func TreeSize(dir string) (size int64, err error) {
 
 		// Check inode to handle hard links correctly
 		inode := fileInfo.Sys().(*syscall.Stat_t).Ino
-		if _, exists := data[inode]; exists {
+		// inode is not a uint64 on all platforms. Cast it to avoid issues.
+		if _, exists := data[uint64(inode)]; exists {
 			return nil
 		}
-		data[inode] = false
+		// inode is not a uint64 on all platforms. Cast it to avoid issues.
+		data[uint64(inode)] = false
 
 		size += s
 

utils/uname_unsupported.go

@@ -1,3 +1,4 @@
+// +build: !linux !amd64
 package utils
 
 import (
@@ -9,5 +10,5 @@ type Utsname struct {
 }
 
 func uname() (*Utsname, error) {
-	return nil, errors.New("Kernel version detection is not available on darwin")
+	return nil, errors.New("Kernel version detection is available only on linux")
 }