Bump github.com/containers/buildah from 1.16.4 to 1.16.5

Bumps [github.com/containers/buildah](https://github.com/containers/buildah) from 1.16.4 to 1.16.5.
- [Release notes](https://github.com/containers/buildah/releases)
- [Changelog](https://github.com/containers/buildah/blob/master/CHANGELOG.md)
- [Commits](https://github.com/containers/buildah/compare/v1.16.4...v1.16.5)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

7 files changed, 62 insertions, 64 deletions

diff --git a/vendor/github.com/openshift/imagebuilder/README.md b/vendor/github.com/openshift/imagebuilder/README.md
index 772747bce..748bff971 100644
--- a/vendor/github.com/openshift/imagebuilder/README.md
+++ b/vendor/github.com/openshift/imagebuilder/README.md
@@ -102,5 +102,6 @@ Example of usage from OpenShift's experimental `dockerbuild` [command with mount
 ## Run conformance tests (very slow):
 
 ```
-go test ./dockerclient/conformance_test.go -tags conformance
+chmod -R go-w ./dockerclient/testdata
+go test ./dockerclient/conformance_test.go -tags conformance -timeout 30m
 ```
diff --git a/vendor/github.com/openshift/imagebuilder/builder.go b/vendor/github.com/openshift/imagebuilder/builder.go
index 583c303c0..22dc548b9 100644
--- a/vendor/github.com/openshift/imagebuilder/builder.go
+++ b/vendor/github.com/openshift/imagebuilder/builder.go
@@ -332,20 +332,10 @@ func ParseFile(path string) (*parser.Node, error) {
 
 // Step creates a new step from the current state.
 func (b *Builder) Step() *Step {
-	argsMap := make(map[string]string)
-	for _, argsVal := range b.Arguments() {
-		val := strings.SplitN(argsVal, "=", 2)
-		if len(val) > 1 {
-			argsMap[val[0]] = val[1]
-		}
-	}
-
-	userArgs := makeUserArgs(b.Env, argsMap) 
-	dst := make([]string, len(userArgs)+len(b.RunConfig.Env))
-	copy(dst, userArgs)
-	dst = append(dst, b.RunConfig.Env...)
-
-	return &Step{Env: dst}
+	// Include build arguments in the table of variables that we'll use in
+	// Resolve(), but override them with values from the actual
+	// environment in case there's any conflict.
+	return &Step{Env: mergeEnv(b.Arguments(), mergeEnv(b.Env, b.RunConfig.Env))}
 }
 
 // Run executes a step, transforming the current builder and
@@ -473,7 +463,7 @@ func (b *Builder) FromImage(image *docker.Image, node *parser.Node) error {
 	SplitChildren(node, command.From)
 
 	b.RunConfig = *image.Config
-	b.Env = append(b.Env, b.RunConfig.Env...)
+	b.Env = mergeEnv(b.Env, b.RunConfig.Env)
 	b.RunConfig.Env = nil
 
 	// Check to see if we have a default PATH, note that windows won't
@@ -573,14 +563,21 @@ var builtinAllowedBuildArgs = map[string]bool{
 }
 
 // ParseDockerIgnore returns a list of the excludes in the .dockerignore file.
-// extracted from fsouza/go-dockerclient.
+// extracted from fsouza/go-dockerclient and modified to drop comments and
+// empty lines.
 func ParseDockerignore(root string) ([]string, error) {
 	var excludes []string
 	ignore, err := ioutil.ReadFile(filepath.Join(root, ".dockerignore"))
 	if err != nil && !os.IsNotExist(err) {
 		return excludes, fmt.Errorf("error reading .dockerignore: '%s'", err)
 	}
-	return strings.Split(string(ignore), "\n"), nil
+	for _, e := range strings.Split(string(ignore), "\n") {
+		if len(e) == 0 || e[0] == '#' {
+			continue
+		}
+		excludes = append(excludes, e)
+	}
+	return excludes, nil
 }
 
 // ExportEnv creates an export statement for a shell that contains all of the
diff --git a/vendor/github.com/openshift/imagebuilder/dispatchers.go b/vendor/github.com/openshift/imagebuilder/dispatchers.go
index 3a350fbee..ea3df04d3 100644
--- a/vendor/github.com/openshift/imagebuilder/dispatchers.go
+++ b/vendor/github.com/openshift/imagebuilder/dispatchers.go
@@ -83,21 +83,9 @@ func env(b *Builder, args []string, attributes map[string]bool, flagArgs []strin
 	for j := 0; j < len(args); j++ {
 		// name  ==> args[j]
 		// value ==> args[j+1]
-		newVar := args[j] + "=" + args[j+1] + ""
-		gotOne := false
-		for i, envVar := range b.RunConfig.Env {
-			envParts := strings.SplitN(envVar, "=", 2)
-			if envParts[0] == args[j] {
-				b.RunConfig.Env[i] = newVar
-				b.Env = append([]string{newVar}, b.Env...)
-				gotOne = true
-				break
-			}
-		}
-		if !gotOne {
-			b.RunConfig.Env = append(b.RunConfig.Env, newVar)
-			b.Env = append([]string{newVar}, b.Env...)
-		}
+		newVar := []string{args[j] + "=" + args[j+1]}
+		b.RunConfig.Env = mergeEnv(b.RunConfig.Env, newVar)
+		b.Env = mergeEnv(b.Env, newVar)
 		j++
 	}
 
@@ -153,7 +141,7 @@ func add(b *Builder, args []string, attributes map[string]bool, flagArgs []strin
 	var chown string
 	last := len(args) - 1
 	dest := makeAbsolute(args[last], b.RunConfig.WorkingDir)
-	userArgs := makeUserArgs(b.Env, b.Args)
+	userArgs := mergeEnv(envMapAsSlice(b.Args), b.Env)
 	for _, a := range flagArgs {
 		arg, err := ProcessWord(a, userArgs)
 		if err != nil {
@@ -182,7 +170,7 @@ func dispatchCopy(b *Builder, args []string, attributes map[string]bool, flagArg
 	dest := makeAbsolute(args[last], b.RunConfig.WorkingDir)
 	var chown string
 	var from string
-	userArgs := makeUserArgs(b.Env, b.Args)
+	userArgs := mergeEnv(envMapAsSlice(b.Args), b.Env)
 	for _, a := range flagArgs {
 		arg, err := ProcessWord(a, userArgs)
 		if err != nil {
diff --git a/vendor/github.com/openshift/imagebuilder/dockerfile/parser/parser.go b/vendor/github.com/openshift/imagebuilder/dockerfile/parser/parser.go
index 0223963e1..b3f4ff4f6 100644
--- a/vendor/github.com/openshift/imagebuilder/dockerfile/parser/parser.go
+++ b/vendor/github.com/openshift/imagebuilder/dockerfile/parser/parser.go
@@ -12,8 +12,8 @@ import (
 	"strings"
 	"unicode"
 
-	"github.com/openshift/imagebuilder/dockerfile/command"
 	"github.com/docker/docker/pkg/system"
+	"github.com/openshift/imagebuilder/dockerfile/command"
 	"github.com/pkg/errors"
 )
 
@@ -37,7 +37,7 @@ type Node struct {
 	Original   string          // original line used before parsing
 	Flags      []string        // only top Node should have this set
 	StartLine  int             // the line in the original dockerfile where the node begins
-	endLine    int             // the line in the original dockerfile where the node ends
+	EndLine    int             // the line in the original dockerfile where the node ends
 }
 
 // Dump dumps the AST defined by `node` as a list of sexps.
@@ -67,7 +67,7 @@ func (node *Node) Dump() string {
 
 func (node *Node) lines(start, end int) {
 	node.StartLine = start
-	node.endLine = end
+	node.EndLine = end
 }
 
 // AddChild adds a new child node, and updates line information
@@ -76,7 +76,7 @@ func (node *Node) AddChild(child *Node, startLine, endLine int) {
 	if node.StartLine < 0 {
 		node.StartLine = startLine
 	}
-	node.endLine = endLine
+	node.EndLine = endLine
 	node.Children = append(node.Children, child)
 }
 
diff --git a/vendor/github.com/openshift/imagebuilder/imagebuilder.spec b/vendor/github.com/openshift/imagebuilder/imagebuilder.spec
index b8680bd10..89951fcec 100644
--- a/vendor/github.com/openshift/imagebuilder/imagebuilder.spec
+++ b/vendor/github.com/openshift/imagebuilder/imagebuilder.spec
@@ -12,7 +12,7 @@
 #
 
 %global golang_version 1.8.1
-%{!?version: %global version 1.1.6}
+%{!?version: %global version 1.1.8}
 %{!?release: %global release 1}
 %global package_name imagebuilder
 %global product_name Container Image Builder
diff --git a/vendor/github.com/openshift/imagebuilder/internals.go b/vendor/github.com/openshift/imagebuilder/internals.go
index 5dc174bf7..f33dc70bb 100644
--- a/vendor/github.com/openshift/imagebuilder/internals.go
+++ b/vendor/github.com/openshift/imagebuilder/internals.go
@@ -93,27 +93,28 @@ func parseOptInterval(f *flag.Flag) (time.Duration, error) {
 	return d, nil
 }
 
-// makeUserArgs - Package the variables from the Dockerfile defined by
-// the ENV aand the ARG statements into one slice so the values
-// defined by both can later be evaluated when resolving variables
-// such as ${MY_USER}.  If the variable is defined by both ARG and ENV
-// don't include the definition of the ARG variable.
-func makeUserArgs(bEnv []string, bArgs map[string]string) (userArgs []string) {
-
-	userArgs = bEnv
-	envMap := make(map[string]string)
-	for _, envVal := range bEnv {
-		val := strings.SplitN(envVal, "=", 2)
-		if len(val) > 1 {
-			envMap[val[0]] = val[1]
+// mergeEnv merges two lists of environment variables, avoiding duplicates.
+func mergeEnv(defaults, overrides []string) []string {
+	s := make([]string, 0, len(defaults)+len(overrides))
+	index := make(map[string]int)
+	for _, envSpec := range append(defaults, overrides...) {
+		envVar := strings.SplitN(envSpec, "=", 2)
+		if i, ok := index[envVar[0]]; ok {
+			s[i] = envSpec
+			continue
 		}
+		s = append(s, envSpec)
+		index[envVar[0]] = len(s) - 1
 	}
+	return s
+}
 
-	for key, value := range bArgs {
-		if _, ok := envMap[key]; ok {
-			continue
-		}
-		userArgs = append(userArgs, key+"="+value)
+// envMapAsSlice returns the contents of a map[string]string as a slice of keys
+// and values joined with "=".
+func envMapAsSlice(m map[string]string) []string {
+	s := make([]string, 0, len(m))
+	for k, v := range m {
+		s = append(s, k+"="+v)
 	}
-	return userArgs
+	return s
 }
diff --git a/vendor/github.com/openshift/imagebuilder/shell_parser.go b/vendor/github.com/openshift/imagebuilder/shell_parser.go
index 65f1db6dc..5c461a34a 100644
--- a/vendor/github.com/openshift/imagebuilder/shell_parser.go
+++ b/vendor/github.com/openshift/imagebuilder/shell_parser.go
@@ -7,6 +7,7 @@ package imagebuilder
 // be added by adding code to the "special ${} format processing" section
 
 import (
+	"errors"
 	"fmt"
 	"strings"
 	"text/scanner"
@@ -119,7 +120,7 @@ func (sw *shellWord) processStopOn(stopChar rune) (string, []string, error) {
 
 		if stopChar != scanner.EOF && ch == stopChar {
 			sw.scanner.Next()
-			break
+			return result, words.getWords(), nil
 		}
 		if fn, ok := charFuncMapping[ch]; ok {
 			// Call special processing func for certain chars
@@ -156,6 +157,10 @@ func (sw *shellWord) processStopOn(stopChar rune) (string, []string, error) {
 		}
 	}
 
+	if stopChar != scanner.EOF {
+		return "", []string{}, fmt.Errorf("unexpected end of statement while looking for matching %s", string(stopChar))
+	}
+
 	return result, words.getWords(), nil
 }
 
@@ -168,9 +173,12 @@ func (sw *shellWord) processSingleQuote() (string, error) {
 
 	for {
 		ch := sw.scanner.Next()
-		if ch == '\'' || ch == scanner.EOF {
+		if ch == '\'' {
 			break
 		}
+		if ch == scanner.EOF {
+			return "", errors.New("unexpected end of statement while looking for matching single-quote")
+		}
 		result += string(ch)
 	}
 
@@ -184,12 +192,15 @@ func (sw *shellWord) processDoubleQuote() (string, error) {
 
 	sw.scanner.Next()
 
-	for sw.scanner.Peek() != scanner.EOF {
+	for {
 		ch := sw.scanner.Peek()
 		if ch == '"' {
 			sw.scanner.Next()
 			break
 		}
+		if ch == scanner.EOF {
+			return "", errors.New("unexpected end of statement while looking for matching double-quote")
+		}
 		if ch == '$' {
 			tmp, err := sw.processDollar()
 			if err != nil {
@@ -206,8 +217,8 @@ func (sw *shellWord) processDoubleQuote() (string, error) {
 					continue
 				}
 
-				if chNext == '"' || chNext == '$' {
-					// \" and \$ can be escaped, all other \'s are left as-is
+				if chNext == '"' || chNext == '$' || chNext == '\\' {
+					// \" and \$ and \\ can be escaped, all other \'s are left as-is
 					ch = sw.scanner.Next()
 				}
 			}