Vendor in latest containers/buildah

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

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

9 files changed, 152 insertions, 43 deletions

diff --git a/vendor/github.com/containers/buildah/chroot/run.go b/vendor/github.com/containers/buildah/chroot/run.go
index 8cfefb3de..6a1400e61 100644
--- a/vendor/github.com/containers/buildah/chroot/run.go
+++ b/vendor/github.com/containers/buildah/chroot/run.go
@@ -955,6 +955,20 @@ func setRlimits(spec *specs.Spec, onlyLower, onlyRaise bool) error {
 	return nil
 }
 
+func makeReadOnly(mntpoint string, flags uintptr) error {
+	var fs unix.Statfs_t
+	// Make sure it's read-only.
+	if err := unix.Statfs(mntpoint, &fs); err != nil {
+		return errors.Wrapf(err, "error checking if directory %q was bound read-only", mntpoint)
+	}
+	if fs.Flags&unix.ST_RDONLY == 0 {
+		if err := unix.Mount(mntpoint, mntpoint, "bind", flags|unix.MS_REMOUNT, ""); err != nil {
+			return errors.Wrapf(err, "error remounting %s in mount namespace read-only", mntpoint)
+		}
+	}
+	return nil
+}
+
 // setupChrootBindMounts actually bind mounts things under the rootfs, and returns a
 // callback that will clean up its work.
 func setupChrootBindMounts(spec *specs.Spec, bundlePath string) (undoBinds func() error, err error) {
@@ -976,7 +990,7 @@ func setupChrootBindMounts(spec *specs.Spec, bundlePath string) (undoBinds func(
 	bindFlags := commonFlags | unix.MS_NODEV
 	devFlags := commonFlags | unix.MS_NOEXEC | unix.MS_NOSUID | unix.MS_RDONLY
 	procFlags := devFlags | unix.MS_NODEV
-	sysFlags := devFlags | unix.MS_NODEV | unix.MS_RDONLY
+	sysFlags := devFlags | unix.MS_NODEV
 
 	// Bind /dev read-only.
 	subDev := filepath.Join(spec.Root.Path, "/dev")
@@ -1030,13 +1044,22 @@ func setupChrootBindMounts(spec *specs.Spec, bundlePath string) (undoBinds func(
 			return undoBinds, errors.Wrapf(err, "error bind mounting /sys from host into mount namespace")
 		}
 	}
-	// Make sure it's read-only.
-	if err = unix.Statfs(subSys, &fs); err != nil {
-		return undoBinds, errors.Wrapf(err, "error checking if directory %q was bound read-only", subSys)
+	if err := makeReadOnly(subSys, sysFlags); err != nil {
+		return undoBinds, err
 	}
-	if fs.Flags&unix.ST_RDONLY == 0 {
-		if err := unix.Mount(subSys, subSys, "bind", sysFlags|unix.MS_REMOUNT, ""); err != nil {
-			return undoBinds, errors.Wrapf(err, "error remounting /sys in mount namespace read-only")
+
+	mnts, _ := mount.GetMounts()
+	for _, m := range mnts {
+		if !strings.HasPrefix(m.Mountpoint, "/sys/") &&
+			m.Mountpoint != "/sys" {
+			continue
+		}
+		subSys := filepath.Join(spec.Root.Path, m.Mountpoint)
+		if err := unix.Mount(m.Mountpoint, subSys, "bind", sysFlags, ""); err != nil {
+			return undoBinds, errors.Wrapf(err, "error bind mounting /sys from host into mount namespace")
+		}
+		if err := makeReadOnly(subSys, sysFlags); err != nil {
+			return undoBinds, err
 		}
 	}
 	logrus.Debugf("bind mounted %q to %q", "/sys", filepath.Join(spec.Root.Path, "/sys"))
@@ -1044,10 +1067,6 @@ func setupChrootBindMounts(spec *specs.Spec, bundlePath string) (undoBinds func(
 	// Add /sys/fs/selinux to the set of masked paths, to ensure that we don't have processes
 	// attempting to interact with labeling, when they aren't allowed to do so.
 	spec.Linux.MaskedPaths = append(spec.Linux.MaskedPaths, "/sys/fs/selinux")
-	// Add /sys/fs/cgroup to the set of masked paths, to ensure that we don't have processes
-	// attempting to mess with cgroup configuration, when they aren't allowed to do so.
-	spec.Linux.MaskedPaths = append(spec.Linux.MaskedPaths, "/sys/fs/cgroup")
-
 	// Bind mount in everything we've been asked to mount.
 	for _, m := range spec.Mounts {
 		// Skip anything that we just mounted.
@@ -1143,7 +1162,7 @@ func setupChrootBindMounts(spec *specs.Spec, bundlePath string) (undoBinds func(
 			logrus.Debugf("mounted a tmpfs to %q", target)
 		}
 		if err = unix.Statfs(target, &fs); err != nil {
-			return undoBinds, errors.Wrapf(err, "error checking if directory %q was bound read-only", subSys)
+			return undoBinds, errors.Wrapf(err, "error checking if directory %q was bound read-only", target)
 		}
 		if uintptr(fs.Flags)&expectedFlags != expectedFlags {
 			if err := unix.Mount(target, target, "bind", requestFlags|unix.MS_REMOUNT, ""); err != nil {
diff --git a/vendor/github.com/containers/buildah/imagebuildah/build.go b/vendor/github.com/containers/buildah/imagebuildah/build.go
index 292ff9541..701241683 100644
--- a/vendor/github.com/containers/buildah/imagebuildah/build.go
+++ b/vendor/github.com/containers/buildah/imagebuildah/build.go
@@ -222,7 +222,7 @@ type Executor struct {
 	forceRmIntermediateCtrs        bool
 	containerIDs                   []string          // Stores the IDs of the successful intermediate containers used during layer build
 	imageMap                       map[string]string // Used to map images that we create to handle the AS construct.
-
+	copyFrom                       string            // Used to keep track of the --from flag from COPY and ADD
 }
 
 // withName creates a new child executor that will be used whenever a COPY statement uses --from=NAME.
@@ -826,6 +826,18 @@ func (b *Executor) Execute(ctx context.Context, stage imagebuilder.Stage) error
 			err     error
 			imgID   string
 		)
+
+		b.copyFrom = ""
+		// Check if --from exists in the step command of COPY or ADD
+		// If it exists, set b.copyfrom to that value
+		for _, n := range step.Flags {
+			if strings.Contains(n, "--from") && (step.Command == "copy" || step.Command == "add") {
+				arr := strings.Split(n, "=")
+				b.copyFrom = b.named[arr[1]].mountPoint
+				break
+			}
+		}
+
 		// checkForLayers will be true if b.layers is true and a cached intermediate image is found.
 		// checkForLayers is set to false when either there is no cached image or a break occurs where
 		// the instructions in the Dockerfile change from a previous build.
@@ -848,6 +860,7 @@ func (b *Executor) Execute(ctx context.Context, stage imagebuilder.Stage) error
 			if err := b.copyExistingImage(ctx, cacheID); err != nil {
 				return err
 			}
+			b.containerIDs = append(b.containerIDs, b.builder.ContainerID)
 			break
 		}
 
@@ -1009,6 +1022,11 @@ func (b *Executor) getFilesToCopy(node *parser.Node) ([]string, error) {
 			currNode = currNode.Next
 			continue
 		}
+		if b.copyFrom != "" {
+			src = append(src, filepath.Join(b.copyFrom, currNode.Value))
+			currNode = currNode.Next
+			continue
+		}
 		matches, err := filepath.Glob(filepath.Join(b.contextDir, currNode.Value))
 		if err != nil {
 			return nil, errors.Wrapf(err, "error finding match for pattern %q", currNode.Value)
@@ -1049,7 +1067,12 @@ func (b *Executor) copiedFilesMatch(node *parser.Node, historyTime *time.Time) (
 		// Change the time format to ensure we don't run into a parsing error when converting again from string
 		// to time.Time. It is a known Go issue that the conversions cause errors sometimes, so specifying a particular
 		// time format here when converting to a string.
-		timeIsGreater, err := resolveModifiedTime(b.contextDir, item, historyTime.Format(time.RFC3339Nano))
+		// If the COPY has --from in the command, change the rootdir to mountpoint of the container it is copying from
+		rootdir := b.contextDir
+		if b.copyFrom != "" {
+			rootdir = b.copyFrom
+		}
+		timeIsGreater, err := resolveModifiedTime(rootdir, item, historyTime.Format(time.RFC3339Nano))
 		if err != nil {
 			return false, errors.Wrapf(err, "error resolving symlinks and comparing modified times: %q", item)
 		}
@@ -1342,7 +1365,10 @@ func BuildDockerfiles(ctx context.Context, store storage.Store, options BuildOpt
 		return "", nil, errors.Wrapf(err, "error creating build executor")
 	}
 	b := imagebuilder.NewBuilder(options.Args)
-	stages := imagebuilder.NewStages(mainNode, b)
+	stages, err := imagebuilder.NewStages(mainNode, b)
+	if err != nil {
+		return "", nil, errors.Wrap(err, "error reading multiple stages")
+	}
 	return exec.Build(ctx, stages)
 }
 
diff --git a/vendor/github.com/containers/buildah/imagebuildah/chroot_symlink.go b/vendor/github.com/containers/buildah/imagebuildah/chroot_symlink.go
index 2269b8dcc..edb5837db 100644
--- a/vendor/github.com/containers/buildah/imagebuildah/chroot_symlink.go
+++ b/vendor/github.com/containers/buildah/imagebuildah/chroot_symlink.go
@@ -140,6 +140,13 @@ func modTimeIsGreater(rootdir, path string, historyTime string) (bool, error) {
 	// Since we are chroot in rootdir, only want the path of the actual filename, i.e path - rootdir.
 	// +1 to account for the extra "/" (e.g rootdir=/home/user/mydir, path=/home/user/mydir/myfile.json)
 	err = filepath.Walk(path[len(rootdir)+1:], func(path string, info os.FileInfo, err error) error {
+		// If using cached images, it is possible for files that are being copied to come from
+		// previous build stages. But if using cached images, then the copied file won't exist
+		// since a container won't have been created for the previous build stage and info will be nil.
+		// In that case just return nil and continue on with using the cached image for the whole build process.
+		if info == nil {
+			return nil
+		}
 		modTime := info.ModTime()
 		if info.Mode()&os.ModeSymlink == os.ModeSymlink {
 			// Evaluate any symlink that occurs to get updated modified information
diff --git a/vendor/github.com/containers/buildah/imagebuildah/util.go b/vendor/github.com/containers/buildah/imagebuildah/util.go
index 35dc5438a..4f5301b73 100644
--- a/vendor/github.com/containers/buildah/imagebuildah/util.go
+++ b/vendor/github.com/containers/buildah/imagebuildah/util.go
@@ -111,3 +111,28 @@ func TempDirForURL(dir, prefix, url string) (name string, subdir string, err err
 func InitReexec() bool {
 	return buildah.InitReexec()
 }
+
+// ReposToMap parses the specified repotags and returns a map with repositories
+// as keys and the corresponding arrays of tags as values.
+func ReposToMap(repotags []string) map[string][]string {
+	// map format is repo -> tag
+	repos := make(map[string][]string)
+	for _, repo := range repotags {
+		var repository, tag string
+		if strings.Contains(repo, ":") {
+			li := strings.LastIndex(repo, ":")
+			repository = repo[0:li]
+			tag = repo[li+1:]
+		} else if len(repo) > 0 {
+			repository = repo
+			tag = "<none>"
+		} else {
+			logrus.Warnf("Found image with empty name")
+		}
+		repos[repository] = append(repos[repository], tag)
+	}
+	if len(repos) == 0 {
+		repos["<none>"] = []string{"<none>"}
+	}
+	return repos
+}
diff --git a/vendor/github.com/containers/buildah/run.go b/vendor/github.com/containers/buildah/run.go
index 636a204b3..5d2cd6a32 100644
--- a/vendor/github.com/containers/buildah/run.go
+++ b/vendor/github.com/containers/buildah/run.go
@@ -1104,14 +1104,6 @@ func (b *Builder) Run(command []string, options RunOptions) error {
 
 	switch isolation {
 	case IsolationOCI:
-		// The default is --rootless=auto, which makes troubleshooting a bit harder.
-		// rootlessFlag := []string{"--rootless=false"}
-		// for _, arg := range options.Args {
-		// 	if strings.HasPrefix(arg, "--rootless") {
-		// 		rootlessFlag = nil
-		// 	}
-		// }
-		// options.Args = append(options.Args, rootlessFlag...)
 		var moreCreateArgs []string
 		if options.NoPivot {
 			moreCreateArgs = []string{"--no-pivot"}
@@ -1125,13 +1117,6 @@ func (b *Builder) Run(command []string, options RunOptions) error {
 		if err := setupRootlessSpecChanges(spec, path, rootUID, rootGID); err != nil {
 			return err
 		}
-		rootlessFlag := []string{"--rootless=true"}
-		for _, arg := range options.Args {
-			if strings.HasPrefix(arg, "--rootless") {
-				rootlessFlag = nil
-			}
-		}
-		options.Args = append(options.Args, rootlessFlag...)
 		err = b.runUsingRuntimeSubproc(isolation, options, configureNetwork, configureNetworks, []string{"--no-new-keyring"}, spec, mountPoint, path, Package+"-"+filepath.Base(path))
 	default:
 		err = errors.Errorf("don't know how to run this command")
diff --git a/vendor/github.com/containers/buildah/vendor.conf b/vendor/github.com/containers/buildah/vendor.conf
index c4410d0af..185cde449 100644
--- a/vendor/github.com/containers/buildah/vendor.conf
+++ b/vendor/github.com/containers/buildah/vendor.conf
@@ -3,9 +3,9 @@ github.com/blang/semver master
 github.com/BurntSushi/toml master
 github.com/containerd/continuity master
 github.com/containernetworking/cni v0.7.0-alpha1
-github.com/containers/image 5e5b67d6b1cf43cc349128ec3ed7d5283a6cc0d1
-github.com/containers/libpod e75469ab99c48e9fbe2b36ade229d384bdea9144
-github.com/containers/storage 09abf3a26b8a3aa69e29fd7faeb260b98d675759
+github.com/containers/image de7be82ee3c7fb676bf6cfdc9090be7cc28f404c
+github.com/containers/libpod fe4f09493f41f675d24c969d1b60d1a6a45ddb9e
+github.com/containers/storage 3161726d1db0d0d4e86a9667dd476f09b997f497
 github.com/docker/distribution 5f6282db7d65e6d72ad7c2cc66310724a57be716
 github.com/docker/docker 86f080cff0914e9694068ed78d503701667c4c00
 github.com/docker/docker-credential-helpers d68f9aeca33f5fd3f08eeae5e9d175edf4e731d1
@@ -38,7 +38,7 @@ github.com/opencontainers/runtime-spec v1.0.0
 github.com/opencontainers/runtime-tools master
 github.com/opencontainers/selinux master
 github.com/openshift/imagebuilder master
-github.com/ostreedev/ostree-go aeb02c6b6aa2889db3ef62f7855650755befd460
+github.com/ostreedev/ostree-go 9ab99253d365aac3a330d1f7281cf29f3d22820b
 github.com/pborman/uuid master
 github.com/pkg/errors master
 github.com/pquerna/ffjson d49c2bc1aa135aad0c6f4fc2056623ec78f5d5ac
diff --git a/vendor/github.com/openshift/imagebuilder/builder.go b/vendor/github.com/openshift/imagebuilder/builder.go
index 1c1afb119..d37965df6 100644
--- a/vendor/github.com/openshift/imagebuilder/builder.go
+++ b/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:
diff --git a/vendor/github.com/openshift/imagebuilder/dispatchers.go b/vendor/github.com/openshift/imagebuilder/dispatchers.go
index 068d5cc6f..f6510c2fd 100644
--- a/vendor/github.com/openshift/imagebuilder/dispatchers.go
+++ b/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
diff --git a/vendor/github.com/openshift/imagebuilder/evaluator.go b/vendor/github.com/openshift/imagebuilder/evaluator.go
index 83263127e..e1cd5d6d6 100644
--- a/vendor/github.com/openshift/imagebuilder/evaluator.go
+++ b/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