Vendor in latest containers/buildah

Pulls in fix for COPY --from when using --layers

Signed-off-by: Urvashi Mohnani <umohnani@redhat.com>

vendor/github.com/openshift/imagebuilder/builder.go

@@ -172,8 +172,11 @@ type Stage struct {
 	Node     *parser.Node
 }
 
-func NewStages(node *parser.Node, b *Builder) Stages {
+func NewStages(node *parser.Node, b *Builder) (Stages, error) {
 	var stages Stages
+	if err := b.extractHeadingArgsFromNode(node); err != nil {
+		return stages, err
+	}
 	for i, root := range SplitBy(node, command.From) {
 		name, _ := extractNameFromNode(root.Children[0])
 		if len(name) == 0 {
@@ -189,7 +192,36 @@ func NewStages(node *parser.Node, b *Builder) Stages {
 			Node: root,
 		})
 	}
-	return stages
+	return stages, nil
+}
+
+func (b *Builder) extractHeadingArgsFromNode(node *parser.Node) error {
+	var args []*parser.Node
+	var children []*parser.Node
+	extract := true
+	for _, child := range node.Children {
+		if extract && child.Value == command.Arg {
+			args = append(args, child)
+		} else {
+			if child.Value == command.From {
+				extract = false
+			}
+			children = append(children, child)
+		}
+	}
+
+	for _, c := range args {
+		step := b.Step()
+		if err := step.Resolve(c); err != nil {
+			return err
+		}
+		if err := b.Run(step, NoopExecutor, false); err != nil {
+			return err
+		}
+	}
+
+	node.Children = children
+	return nil
 }
 
 func extractNameFromNode(node *parser.Node) (string, bool) {
@@ -345,6 +377,9 @@ var ErrNoFROM = fmt.Errorf("no FROM statement found")
 // is set to the first From found, or left unchanged if already
 // set.
 func (b *Builder) From(node *parser.Node) (string, error) {
+	if err := b.extractHeadingArgsFromNode(node); err != nil {
+		return "", err
+	}
 	children := SplitChildren(node, command.From)
 	switch {
 	case len(children) == 0:

vendor/github.com/openshift/imagebuilder/dispatchers.go

@@ -27,11 +27,6 @@ var (
 	obRgex = regexp.MustCompile(`(?i)^\s*ONBUILD\s*`)
 )
 
-// dispatch with no layer / parsing. This is effectively not a command.
-func nullDispatch(b *Builder, args []string, attributes map[string]bool, flagArgs []string, original string) error {
-	return nil
-}
-
 // ENV foo bar
 //
 // Sets the environment variable foo to bar, also makes interpolation
@@ -181,6 +176,17 @@ func from(b *Builder, args []string, attributes map[string]bool, flagArgs []stri
 	}
 
 	name := args[0]
+
+	// Support ARG before from
+	argStrs := []string{}
+	for n, v := range b.Args {
+		argStrs = append(argStrs, n+"="+v)
+	}
+	var err error
+	if name, err = ProcessWord(name, argStrs); err != nil {
+		return err
+	}
+
 	// Windows cannot support a container with no base image.
 	if name == NoBaseImageSpecifier {
 		if runtime.GOOS == "windows" {
@@ -438,6 +444,7 @@ func healthcheck(b *Builder, args []string, attributes map[string]bool, flagArgs
 		healthcheck := docker.HealthConfig{}
 
 		flags := flag.NewFlagSet("", flag.ContinueOnError)
+		flags.String("start-period", "", "")
 		flags.String("interval", "", "")
 		flags.String("timeout", "", "")
 		flRetries := flags.String("retries", "", "")
@@ -462,6 +469,12 @@ func healthcheck(b *Builder, args []string, attributes map[string]bool, flagArgs
 			return fmt.Errorf("Unknown type %#v in HEALTHCHECK (try CMD)", typ)
 		}
 
+		period, err := parseOptInterval(flags.Lookup("start-period"))
+		if err != nil {
+			return err
+		}
+		healthcheck.StartPeriod = period
+
 		interval, err := parseOptInterval(flags.Lookup("interval"))
 		if err != nil {
 			return err

vendor/github.com/openshift/imagebuilder/evaluator.go

@@ -122,8 +122,7 @@ func (b *Step) Resolve(ast *parser.Node) error {
 	envs := b.Env
 	for ast.Next != nil {
 		ast = ast.Next
-		var str string
-		str = ast.Value
+		str := ast.Value
 		if replaceEnvAllowed[cmd] {
 			var err error
 			var words []string