Initial commit

vendor/github.com/hyperhq/hypercli/builder/dockerfile/internals_unix.go

@@ -0,0 +1,40 @@
+// +build !windows
+
+package dockerfile
+
+import (
+	"os"
+	"path/filepath"
+)
+
+func fixPermissions(source, destination string, uid, gid int, destExisted bool) error {
+	// If the destination didn't already exist, or the destination isn't a
+	// directory, then we should Lchown the destination. Otherwise, we shouldn't
+	// Lchown the destination.
+	destStat, err := os.Stat(destination)
+	if err != nil {
+		// This should *never* be reached, because the destination must've already
+		// been created while untar-ing the context.
+		return err
+	}
+	doChownDestination := !destExisted || !destStat.IsDir()
+
+	// We Walk on the source rather than on the destination because we don't
+	// want to change permissions on things we haven't created or modified.
+	return filepath.Walk(source, func(fullpath string, info os.FileInfo, err error) error {
+		// Do not alter the walk root iff. it existed before, as it doesn't fall under
+		// the domain of "things we should chown".
+		if !doChownDestination && (source == fullpath) {
+			return nil
+		}
+
+		// Path is prefixed by source: substitute with destination instead.
+		cleaned, err := filepath.Rel(source, fullpath)
+		if err != nil {
+			return err
+		}
+
+		fullpath = filepath.Join(destination, cleaned)
+		return os.Lchown(fullpath, uid, gid)
+	})
+}