Merge pull request #3260 from TomSweeneyRedHat/dev/tsweeney/buildah1.8.3

Vendor Buildah v1.8.3

12 files changed, 235 insertions, 174 deletions

diff --git a/vendor/github.com/containers/buildah/add.go b/vendor/github.com/containers/buildah/add.go
index 589e090a8..11bfb6a12 100644
--- a/vendor/github.com/containers/buildah/add.go
+++ b/vendor/github.com/containers/buildah/add.go
@@ -14,6 +14,7 @@ import (
 	"github.com/containers/buildah/pkg/chrootuser"
 	"github.com/containers/buildah/util"
 	"github.com/containers/storage/pkg/archive"
+	"github.com/containers/storage/pkg/fileutils"
 	"github.com/containers/storage/pkg/idtools"
 	"github.com/containers/storage/pkg/system"
 	"github.com/opencontainers/runtime-spec/specs-go"
@@ -89,7 +90,10 @@ func addURL(destination, srcurl string, owner idtools.IDPair, hasher io.Writer)
 // filesystem, optionally extracting contents of local files that look like
 // non-empty archives.
 func (b *Builder) Add(destination string, extract bool, options AddAndCopyOptions, source ...string) error {
-	excludes := dockerIgnoreHelper(options.Excludes, options.ContextDir)
+	excludes, err := dockerIgnoreMatcher(options.Excludes, options.ContextDir)
+	if err != nil {
+		return err
+	}
 	mountPoint, err := b.Mount(b.MountLabel)
 	if err != nil {
 		return err
@@ -100,7 +104,7 @@ func (b *Builder) Add(destination string, extract bool, options AddAndCopyOption
 		}
 	}()
 	// Find out which user (and group) the destination should belong to.
-	user, err := b.user(mountPoint, options.Chown)
+	user, _, err := b.user(mountPoint, options.Chown)
 	if err != nil {
 		return err
 	}
@@ -153,12 +157,12 @@ func (b *Builder) Add(destination string, extract bool, options AddAndCopyOption
 }
 
 // user returns the user (and group) information which the destination should belong to.
-func (b *Builder) user(mountPoint string, userspec string) (specs.User, error) {
+func (b *Builder) user(mountPoint string, userspec string) (specs.User, string, error) {
 	if userspec == "" {
 		userspec = b.User()
 	}
 
-	uid, gid, err := chrootuser.GetUser(mountPoint, userspec)
+	uid, gid, homeDir, err := chrootuser.GetUser(mountPoint, userspec)
 	u := specs.User{
 		UID:      uid,
 		GID:      gid,
@@ -175,45 +179,48 @@ func (b *Builder) user(mountPoint string, userspec string) (specs.User, error) {
 		}
 
 	}
-	return u, err
+	return u, homeDir, err
 }
 
-// dockerIgnore struct keep info from .dockerignore
-type dockerIgnore struct {
-	ExcludePath string
-	IsExcluded  bool
-}
-
-// dockerIgnoreHelper returns the lines from .dockerignore file without the comments
-// and reverses the order
-func dockerIgnoreHelper(lines []string, contextDir string) []dockerIgnore {
-	var excludes []dockerIgnore
-	// the last match of a file in the .dockerignmatches determines whether it is included or excluded
-	// reverse the order
-	for i := len(lines) - 1; i >= 0; i-- {
-		exclude := lines[i]
-		// ignore the comment in .dockerignore
-		if strings.HasPrefix(exclude, "#") || len(exclude) == 0 {
+// dockerIgnoreMatcher returns a matcher based on the contents of the .dockerignore file under contextDir
+func dockerIgnoreMatcher(lines []string, contextDir string) (*fileutils.PatternMatcher, error) {
+	// if there's no context dir, there's no .dockerignore file to consult
+	if contextDir == "" {
+		return nil, nil
+	}
+	patterns := []string{".dockerignore"}
+	for _, ignoreSpec := range lines {
+		ignoreSpec = strings.TrimSpace(ignoreSpec)
+		// ignore comments passed back from .dockerignore
+		if ignoreSpec == "" || ignoreSpec[0] == '#' {
 			continue
 		}
-		excludeFlag := true
-		if strings.HasPrefix(exclude, "!") {
-			exclude = strings.TrimPrefix(exclude, "!")
-			excludeFlag = false
+		// if the spec starts with '!' it means the pattern
+		// should be included. make a note so that we can move
+		// it to the front of the updated pattern
+		includeFlag := ""
+		if strings.HasPrefix(ignoreSpec, "!") {
+			includeFlag = "!"
+			ignoreSpec = ignoreSpec[1:]
 		}
-		excludes = append(excludes, dockerIgnore{ExcludePath: filepath.Join(contextDir, exclude), IsExcluded: excludeFlag})
+		if ignoreSpec == "" {
+			continue
+		}
+		patterns = append(patterns, includeFlag+filepath.Join(contextDir, ignoreSpec))
 	}
-	if len(excludes) != 0 {
-		excludes = append(excludes, dockerIgnore{ExcludePath: filepath.Join(contextDir, ".dockerignore"), IsExcluded: true})
+	// if there are no patterns, save time by not constructing the object
+	if len(patterns) == 0 {
+		return nil, nil
 	}
-	return excludes
-}
-
-func addHelper(excludes []dockerIgnore, extract bool, dest string, destfi os.FileInfo, hostOwner idtools.IDPair, options AddAndCopyOptions, copyFileWithTar, copyWithTar, untarPath func(src, dest string) error, source ...string) error {
-	dirsInDockerignore, err := getDirsInDockerignore(options.ContextDir, excludes)
+	// return a matcher object
+	matcher, err := fileutils.NewPatternMatcher(patterns)
 	if err != nil {
-		return errors.Wrapf(err, "error checking directories in .dockerignore")
+		return nil, errors.Wrapf(err, "error creating file matcher using patterns %v", patterns)
 	}
+	return matcher, nil
+}
+
+func addHelper(excludes *fileutils.PatternMatcher, extract bool, dest string, destfi os.FileInfo, hostOwner idtools.IDPair, options AddAndCopyOptions, copyFileWithTar, copyWithTar, untarPath func(src, dest string) error, source ...string) error {
 	for _, src := range source {
 		if strings.HasPrefix(src, "http://") || strings.HasPrefix(src, "https://") {
 			// We assume that source is a file, and we're copying
@@ -242,7 +249,7 @@ func addHelper(excludes []dockerIgnore, extract bool, dest string, destfi os.Fil
 		if len(glob) == 0 {
 			return errors.Wrapf(syscall.ENOENT, "no files found matching %q", src)
 		}
-	outer:
+
 		for _, gsrc := range glob {
 			esrc, err := filepath.EvalSymlinks(gsrc)
 			if err != nil {
@@ -261,7 +268,7 @@ func addHelper(excludes []dockerIgnore, extract bool, dest string, destfi os.Fil
 					return errors.Wrapf(err, "error creating directory %q", dest)
 				}
 				logrus.Debugf("copying %q to %q", esrc+string(os.PathSeparator)+"*", dest+string(os.PathSeparator)+"*")
-				if len(excludes) == 0 {
+				if excludes == nil {
 					if err = copyWithTar(esrc, dest); err != nil {
 						return errors.Wrapf(err, "error copying %q to %q", esrc, dest)
 					}
@@ -271,23 +278,12 @@ func addHelper(excludes []dockerIgnore, extract bool, dest string, destfi os.Fil
 					if err != nil {
 						return err
 					}
-					for _, exclude := range excludes {
-						match, err := filepath.Match(filepath.Clean(exclude.ExcludePath), filepath.Clean(path))
-						if err != nil {
-							return err
-						}
-						prefix, exist := dirsInDockerignore[exclude.ExcludePath]
-						hasPrefix := false
-						if exist {
-							hasPrefix = filepath.HasPrefix(path, prefix)
-						}
-						if !(match || hasPrefix) {
-							continue
-						}
-						if (hasPrefix && exclude.IsExcluded) || (match && exclude.IsExcluded) {
-							return nil
-						}
-						break
+					skip, err := excludes.Matches(path)
+					if err != nil {
+						return errors.Wrapf(err, "error checking if %s is an excluded path", path)
+					}
+					if skip {
+						return nil
 					}
 					// combine the filename with the dest directory
 					fpath, err := filepath.Rel(esrc, path)
@@ -297,8 +293,8 @@ func addHelper(excludes []dockerIgnore, extract bool, dest string, destfi os.Fil
 					mtime := info.ModTime()
 					atime := mtime
 					times := []syscall.Timespec{
-						{Sec: atime.Unix(), Nsec: atime.UnixNano() % 1000000000},
-						{Sec: mtime.Unix(), Nsec: mtime.UnixNano() % 1000000000},
+						syscall.NsecToTimespec(atime.Unix()),
+						syscall.NsecToTimespec(mtime.Unix()),
 					}
 					if info.IsDir() {
 						return addHelperDirectory(esrc, path, filepath.Join(dest, fpath), info, hostOwner, times)
@@ -320,20 +316,6 @@ func addHelper(excludes []dockerIgnore, extract bool, dest string, destfi os.Fil
 				continue
 			}
 
-			for _, exclude := range excludes {
-				match, err := filepath.Match(filepath.Clean(exclude.ExcludePath), esrc)
-				if err != nil {
-					return err
-				}
-				if !match {
-					continue
-				}
-				if exclude.IsExcluded {
-					continue outer
-				}
-				break
-			}
-
 			if !extract || !archive.IsArchivePath(esrc) {
 				// This source is a file, and either it's not an
 				// archive, or we don't care whether or not it's an
@@ -349,6 +331,7 @@ func addHelper(excludes []dockerIgnore, extract bool, dest string, destfi os.Fil
 				}
 				continue
 			}
+
 			// We're extracting an archive into the destination directory.
 			logrus.Debugf("extracting contents of %q into %q", esrc, dest)
 			if err = untarPath(esrc, dest); err != nil {
@@ -381,7 +364,15 @@ func addHelperSymlink(src, dest string, info os.FileInfo, hostOwner idtools.IDPa
 		return errors.Wrapf(err, "error reading contents of symbolic link at %q", src)
 	}
 	if err = os.Symlink(linkContents, dest); err != nil {
-		return errors.Wrapf(err, "error creating symbolic link to %q at %q", linkContents, dest)
+		if !os.IsExist(err) {
+			return errors.Wrapf(err, "error creating symbolic link to %q at %q", linkContents, dest)
+		}
+		if err = os.RemoveAll(dest); err != nil {
+			return errors.Wrapf(err, "error clearing symbolic link target %q", dest)
+		}
+		if err = os.Symlink(linkContents, dest); err != nil {
+			return errors.Wrapf(err, "error creating symbolic link to %q at %q (second try)", linkContents, dest)
+		}
 	}
 	if err = idtools.SafeLchown(dest, hostOwner.UID, hostOwner.GID); err != nil {
 		return errors.Wrapf(err, "error setting owner of symbolic link %q to %d:%d", dest, hostOwner.UID, hostOwner.GID)
@@ -392,35 +383,3 @@ func addHelperSymlink(src, dest string, info os.FileInfo, hostOwner idtools.IDPa
 	logrus.Debugf("Symlink(%s, %s)", linkContents, dest)
 	return nil
 }
-
-func getDirsInDockerignore(srcAbsPath string, excludes []dockerIgnore) (map[string]string, error) {
-	visitedDir := make(map[string]string)
-	if len(excludes) == 0 {
-		return visitedDir, nil
-	}
-	err := filepath.Walk(srcAbsPath, func(path string, info os.FileInfo, err error) error {
-		if err != nil {
-			return err
-		}
-		if info.IsDir() {
-			for _, exclude := range excludes {
-				match, err := filepath.Match(filepath.Clean(exclude.ExcludePath), filepath.Clean(path))
-				if err != nil {
-					return err
-				}
-				if !match {
-					continue
-				}
-				if _, exist := visitedDir[exclude.ExcludePath]; exist {
-					continue
-				}
-				visitedDir[exclude.ExcludePath] = path
-			}
-		}
-		return nil
-	})
-	if err != nil {
-		return visitedDir, err
-	}
-	return visitedDir, nil
-}
diff --git a/vendor/github.com/containers/buildah/buildah.go b/vendor/github.com/containers/buildah/buildah.go
index 33b7afccd..56c8f088f 100644
--- a/vendor/github.com/containers/buildah/buildah.go
+++ b/vendor/github.com/containers/buildah/buildah.go
@@ -26,7 +26,7 @@ const (
 	Package = "buildah"
 	// Version for the Package.  Bump version in contrib/rpm/buildah.spec
 	// too.
-	Version = "1.9.0-dev"
+	Version = "1.8.3"
 	// The value we use to identify what type of information, currently a
 	// serialized Builder structure, we are using as per-container state.
 	// This should only be changed when we make incompatible changes to
diff --git a/vendor/github.com/containers/buildah/chroot/run.go b/vendor/github.com/containers/buildah/chroot/run.go
index c65926c8e..d6e5a61ea 100644
--- a/vendor/github.com/containers/buildah/chroot/run.go
+++ b/vendor/github.com/containers/buildah/chroot/run.go
@@ -84,9 +84,18 @@ type runUsingChrootExecSubprocOptions struct {
 // RunUsingChroot runs a chrooted process, using some of the settings from the
 // passed-in spec, and using the specified bundlePath to hold temporary files,
 // directories, and mountpoints.
-func RunUsingChroot(spec *specs.Spec, bundlePath string, stdin io.Reader, stdout, stderr io.Writer) (err error) {
+func RunUsingChroot(spec *specs.Spec, bundlePath, homeDir string, stdin io.Reader, stdout, stderr io.Writer) (err error) {
 	var confwg sync.WaitGroup
-
+	var homeFound bool
+	for _, env := range spec.Process.Env {
+		if strings.HasPrefix(env, "HOME=") {
+			homeFound = true
+			break
+		}
+	}
+	if !homeFound {
+		spec.Process.Env = append(spec.Process.Env, fmt.Sprintf("HOME=%s", homeDir))
+	}
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
 
diff --git a/vendor/github.com/containers/buildah/config.go b/vendor/github.com/containers/buildah/config.go
index 05b0abb23..234f93259 100644
--- a/vendor/github.com/containers/buildah/config.go
+++ b/vendor/github.com/containers/buildah/config.go
@@ -3,7 +3,6 @@ package buildah
 import (
 	"context"
 	"encoding/json"
-	"os"
 	"runtime"
 	"strings"
 	"time"
@@ -269,21 +268,11 @@ func (b *Builder) Env() []string {
 // built using an image built from this container.
 func (b *Builder) SetEnv(k string, v string) {
 	reset := func(s *[]string) {
-		getenv := func(name string) string {
-			for i := range *s {
-				val := strings.SplitN((*s)[i], "=", 2)
-				if len(val) == 2 && val[0] == name {
-					return val[1]
-				}
-			}
-			return name
-		}
 		n := []string{}
 		for i := range *s {
 			if !strings.HasPrefix((*s)[i], k+"=") {
 				n = append(n, (*s)[i])
 			}
-			v = os.Expand(v, getenv)
 		}
 		n = append(n, k+"="+v)
 		*s = n
diff --git a/vendor/github.com/containers/buildah/imagebuildah/build.go b/vendor/github.com/containers/buildah/imagebuildah/build.go
index b8b9db0f3..3665251cd 100644
--- a/vendor/github.com/containers/buildah/imagebuildah/build.go
+++ b/vendor/github.com/containers/buildah/imagebuildah/build.go
@@ -487,6 +487,7 @@ func (s *StageExecutor) Copy(excludes []string, copies ...imagebuilder.Copy) err
 		// Check the file and see if part of it is a symlink.
 		// Convert it to the target if so.  To be ultrasafe
 		// do the same for the mountpoint.
+		hadFinalPathSeparator := len(copy.Dest) > 0 && copy.Dest[len(copy.Dest)-1] == os.PathSeparator
 		secureMountPoint, err := securejoin.SecureJoin("", s.mountPoint)
 		finalPath, err := securejoin.SecureJoin(secureMountPoint, copy.Dest)
 		if err != nil {
@@ -496,6 +497,11 @@ func (s *StageExecutor) Copy(excludes []string, copies ...imagebuilder.Copy) err
 			return errors.Wrapf(err, "error resolving copy destination %s", copy.Dest)
 		}
 		copy.Dest = strings.TrimPrefix(finalPath, secureMountPoint)
+		if len(copy.Dest) == 0 || copy.Dest[len(copy.Dest)-1] != os.PathSeparator {
+			if hadFinalPathSeparator {
+				copy.Dest += string(os.PathSeparator)
+			}
+		}
 
 		if copy.Download {
 			logrus.Debugf("ADD %#v, %#v", excludes, copy)
@@ -507,29 +513,32 @@ func (s *StageExecutor) Copy(excludes []string, copies ...imagebuilder.Copy) err
 		}
 		sources := []string{}
 		for _, src := range copy.Src {
+			contextDir := s.executor.contextDir
+			copyExcludes := excludes
 			if strings.HasPrefix(src, "http://") || strings.HasPrefix(src, "https://") {
 				sources = append(sources, src)
 			} else if len(copy.From) > 0 {
 				if other, ok := s.executor.stages[copy.From]; ok && other.index < s.index {
 					sources = append(sources, filepath.Join(other.mountPoint, src))
+					contextDir = other.mountPoint
 				} else if builder, ok := s.executor.containerMap[copy.From]; ok {
 					sources = append(sources, filepath.Join(builder.MountPoint, src))
+					contextDir = builder.MountPoint
 				} else {
 					return errors.Errorf("the stage %q has not been built", copy.From)
 				}
 			} else {
 				sources = append(sources, filepath.Join(s.executor.contextDir, src))
+				copyExcludes = append(s.executor.excludes, excludes...)
+			}
+			options := buildah.AddAndCopyOptions{
+				Chown:      copy.Chown,
+				ContextDir: contextDir,
+				Excludes:   copyExcludes,
+			}
+			if err := s.builder.Add(copy.Dest, copy.Download, options, sources...); err != nil {
+				return err
 			}
-		}
-
-		options := buildah.AddAndCopyOptions{
-			Chown:      copy.Chown,
-			ContextDir: s.executor.contextDir,
-			Excludes:   s.executor.excludes,
-		}
-
-		if err := s.builder.Add(copy.Dest, copy.Download, options, sources...); err != nil {
-			return err
 		}
 	}
 	return nil
@@ -590,7 +599,11 @@ func (s *StageExecutor) Run(run imagebuilder.Run, config docker.Config) error {
 
 	args := run.Args
 	if run.Shell {
-		args = append([]string{"/bin/sh", "-c"}, args...)
+		if len(config.Shell) > 0 && s.builder.Format == buildah.Dockerv2ImageManifest {
+			args = append(config.Shell, args...)
+		} else {
+			args = append([]string{"/bin/sh", "-c"}, args...)
+		}
 	}
 	if err := s.volumeCacheSave(); err != nil {
 		return err
diff --git a/vendor/github.com/containers/buildah/imagebuildah/util.go b/vendor/github.com/containers/buildah/imagebuildah/util.go
index f982fcebf..3962d1a9d 100644
--- a/vendor/github.com/containers/buildah/imagebuildah/util.go
+++ b/vendor/github.com/containers/buildah/imagebuildah/util.go
@@ -17,7 +17,7 @@ import (
 )
 
 func cloneToDirectory(url, dir string) error {
-	if !strings.HasPrefix(url, "git://") {
+	if !strings.HasPrefix(url, "git://") && !strings.HasSuffix(url, ".git") {
 		url = "git://" + url
 	}
 	logrus.Debugf("cloning %q to %q", url, dir)
@@ -72,7 +72,7 @@ func TempDirForURL(dir, prefix, url string) (name string, subdir string, err err
 	if err != nil {
 		return "", "", errors.Wrapf(err, "error creating temporary directory for %q", url)
 	}
-	if strings.HasPrefix(url, "git://") {
+	if strings.HasPrefix(url, "git://") || strings.HasSuffix(url, ".git") {
 		err = cloneToDirectory(url, name)
 		if err != nil {
 			if err2 := os.Remove(name); err2 != nil {
diff --git a/vendor/github.com/containers/buildah/pkg/chrootuser/user.go b/vendor/github.com/containers/buildah/pkg/chrootuser/user.go
index c83dcc230..26a67c35a 100644
--- a/vendor/github.com/containers/buildah/pkg/chrootuser/user.go
+++ b/vendor/github.com/containers/buildah/pkg/chrootuser/user.go
@@ -18,7 +18,7 @@ var (
 // it will use the /etc/passwd and /etc/group files inside of the rootdir
 // to return this information.
 // userspec format [user | user:group | uid | uid:gid | user:gid | uid:group ]
-func GetUser(rootdir, userspec string) (uint32, uint32, error) {
+func GetUser(rootdir, userspec string) (uint32, uint32, string, error) {
 	var gid64 uint64
 	var gerr error = user.UnknownGroupError("error looking up group")
 
@@ -26,7 +26,7 @@ func GetUser(rootdir, userspec string) (uint32, uint32, error) {
 	userspec = spec[0]
 	groupspec := ""
 	if userspec == "" {
-		return 0, 0, nil
+		return 0, 0, "/", nil
 	}
 	if len(spec) > 1 {
 		groupspec = spec[1]
@@ -65,15 +65,21 @@ func GetUser(rootdir, userspec string) (uint32, uint32, error) {
 		}
 	}
 
+	homedir, err := lookupHomedirInContainer(rootdir, uid64)
+	if err != nil {
+		homedir = "/"
+	}
+
 	if uerr == nil && gerr == nil {
-		return uint32(uid64), uint32(gid64), nil
+		return uint32(uid64), uint32(gid64), homedir, nil
 	}
 
-	err := errors.Wrapf(uerr, "error determining run uid")
+	err = errors.Wrapf(uerr, "error determining run uid")
 	if uerr == nil {
 		err = errors.Wrapf(gerr, "error determining run gid")
 	}
-	return 0, 0, err
+
+	return 0, 0, homedir, err
 }
 
 // GetGroup returns the gid by looking it up in the /etc/group file
diff --git a/vendor/github.com/containers/buildah/pkg/chrootuser/user_basic.go b/vendor/github.com/containers/buildah/pkg/chrootuser/user_basic.go
index 79b0b24b5..6c997c4c9 100644
--- a/vendor/github.com/containers/buildah/pkg/chrootuser/user_basic.go
+++ b/vendor/github.com/containers/buildah/pkg/chrootuser/user_basic.go
@@ -25,3 +25,7 @@ func lookupAdditionalGroupsForUIDInContainer(rootdir string, userid uint64) (gid
 func lookupUIDInContainer(rootdir string, uid uint64) (string, uint64, error) {
 	return "", 0, errors.New("UID lookup not supported")
 }
+
+func lookupHomedirInContainer(rootdir string, uid uint64) (string, error) {
+	return "", errors.New("Home directory lookup not supported")
+}
diff --git a/vendor/github.com/containers/buildah/pkg/chrootuser/user_linux.go b/vendor/github.com/containers/buildah/pkg/chrootuser/user_linux.go
index 583eca569..ea20fca80 100644
--- a/vendor/github.com/containers/buildah/pkg/chrootuser/user_linux.go
+++ b/vendor/github.com/containers/buildah/pkg/chrootuser/user_linux.go
@@ -84,6 +84,7 @@ type lookupPasswdEntry struct {
 	name string
 	uid  uint64
 	gid  uint64
+	home string
 }
 type lookupGroupEntry struct {
 	name string
@@ -135,6 +136,7 @@ func parseNextPasswd(rc *bufio.Reader) *lookupPasswdEntry {
 		name: fields[0],
 		uid:  uid,
 		gid:  gid,
+		home: fields[5],
 	}
 }
 
@@ -291,3 +293,29 @@ func lookupUIDInContainer(rootdir string, uid uint64) (string, uint64, error) {
 
 	return "", 0, user.UnknownUserError(fmt.Sprintf("error looking up uid %q", uid))
 }
+
+func lookupHomedirInContainer(rootdir string, uid uint64) (string, error) {
+	cmd, f, err := openChrootedFile(rootdir, "/etc/passwd")
+	if err != nil {
+		return "", err
+	}
+	defer func() {
+		_ = cmd.Wait()
+	}()
+	rc := bufio.NewReader(f)
+	defer f.Close()
+
+	lookupUser.Lock()
+	defer lookupUser.Unlock()
+
+	pwd := parseNextPasswd(rc)
+	for pwd != nil {
+		if pwd.uid != uid {
+			pwd = parseNextPasswd(rc)
+			continue
+		}
+		return pwd.home, nil
+	}
+
+	return "", user.UnknownUserError(fmt.Sprintf("error looking up uid %q for homedir", uid))
+}
diff --git a/vendor/github.com/containers/buildah/pkg/secrets/secrets.go b/vendor/github.com/containers/buildah/pkg/secrets/secrets.go
index 97b681125..70bd6a4b7 100644
--- a/vendor/github.com/containers/buildah/pkg/secrets/secrets.go
+++ b/vendor/github.com/containers/buildah/pkg/secrets/secrets.go
@@ -117,7 +117,12 @@ func getMounts(filePath string) []string {
 	}
 	var mounts []string
 	for scanner.Scan() {
-		mounts = append(mounts, scanner.Text())
+		if strings.HasPrefix(strings.TrimSpace(scanner.Text()), "/") {
+			mounts = append(mounts, scanner.Text())
+		} else {
+			logrus.Debugf("skipping unrecognized mount in %v: %q",
+				filePath, scanner.Text())
+		}
 	}
 	return mounts
 }
@@ -190,58 +195,79 @@ func addSecretsFromMountsFile(filePath, mountLabel, containerWorkingDir, mountPr
 	var mounts []rspec.Mount
 	defaultMountsPaths := getMounts(filePath)
 	for _, path := range defaultMountsPaths {
-		hostDir, ctrDir, err := getMountsMap(path)
+		hostDirOrFile, ctrDirOrFile, err := getMountsMap(path)
 		if err != nil {
 			return nil, err
 		}
-		// skip if the hostDir path doesn't exist
-		if _, err = os.Stat(hostDir); err != nil {
+		// skip if the hostDirOrFile path doesn't exist
+		fileInfo, err := os.Stat(hostDirOrFile)
+		if err != nil {
 			if os.IsNotExist(err) {
-				logrus.Warnf("Path %q from %q doesn't exist, skipping", hostDir, filePath)
+				logrus.Warnf("Path %q from %q doesn't exist, skipping", hostDirOrFile, filePath)
 				continue
 			}
-			return nil, errors.Wrapf(err, "failed to stat %q", hostDir)
+			return nil, errors.Wrapf(err, "failed to stat %q", hostDirOrFile)
 		}
 
-		ctrDirOnHost := filepath.Join(containerWorkingDir, ctrDir)
+		ctrDirOrFileOnHost := filepath.Join(containerWorkingDir, ctrDirOrFile)
 
-		// In the event of a restart, don't want to copy secrets over again as they already would exist in ctrDirOnHost
-		_, err = os.Stat(ctrDirOnHost)
+		// In the event of a restart, don't want to copy secrets over again as they already would exist in ctrDirOrFileOnHost
+		_, err = os.Stat(ctrDirOrFileOnHost)
 		if os.IsNotExist(err) {
-			if err = os.MkdirAll(ctrDirOnHost, 0755); err != nil {
-				return nil, errors.Wrapf(err, "making container directory %q failed", ctrDirOnHost)
-			}
-			hostDir, err = resolveSymbolicLink(hostDir)
+
+			hostDirOrFile, err = resolveSymbolicLink(hostDirOrFile)
 			if err != nil {
 				return nil, err
 			}
 
-			data, err := getHostSecretData(hostDir)
-			if err != nil {
-				return nil, errors.Wrapf(err, "getting host secret data failed")
-			}
-			for _, s := range data {
-				if err := s.saveTo(ctrDirOnHost); err != nil {
-					return nil, errors.Wrapf(err, "error saving data to container filesystem on host %q", ctrDirOnHost)
+			switch mode := fileInfo.Mode(); {
+			case mode.IsDir():
+				if err = os.MkdirAll(ctrDirOrFileOnHost, 0755); err != nil {
+					return nil, errors.Wrapf(err, "making container directory %q failed", ctrDirOrFileOnHost)
+				}
+				data, err := getHostSecretData(hostDirOrFile)
+				if err != nil {
+					return nil, errors.Wrapf(err, "getting host secret data failed")
+				}
+				for _, s := range data {
+					if err := s.saveTo(ctrDirOrFileOnHost); err != nil {
+						return nil, errors.Wrapf(err, "error saving data to container filesystem on host %q", ctrDirOrFileOnHost)
+					}
+				}
+			case mode.IsRegular():
+				data, err := readFile("", hostDirOrFile)
+				if err != nil {
+					return nil, errors.Wrapf(err, "error reading file %q", hostDirOrFile)
+
+				}
+				for _, s := range data {
+					if err := os.MkdirAll(filepath.Dir(ctrDirOrFileOnHost), 0700); err != nil {
+						return nil, err
+					}
+					if err := ioutil.WriteFile(ctrDirOrFileOnHost, s.data, 0700); err != nil {
+						return nil, errors.Wrapf(err, "error saving data to container filesystem on host %q", ctrDirOrFileOnHost)
+					}
 				}
+			default:
+				return nil, errors.Errorf("unsupported file type for: %q", hostDirOrFile)
 			}
 
-			err = label.Relabel(ctrDirOnHost, mountLabel, false)
+			err = label.Relabel(ctrDirOrFileOnHost, mountLabel, false)
 			if err != nil {
 				return nil, errors.Wrap(err, "error applying correct labels")
 			}
 			if uid != 0 || gid != 0 {
-				if err := rchown(ctrDirOnHost, uid, gid); err != nil {
+				if err := rchown(ctrDirOrFileOnHost, uid, gid); err != nil {
 					return nil, err
 				}
 			}
 		} else if err != nil {
-			return nil, errors.Wrapf(err, "error getting status of %q", ctrDirOnHost)
+			return nil, errors.Wrapf(err, "error getting status of %q", ctrDirOrFileOnHost)
 		}
 
 		m := rspec.Mount{
-			Source:      filepath.Join(mountPrefix, ctrDir),
-			Destination: ctrDir,
+			Source:      filepath.Join(mountPrefix, ctrDirOrFile),
+			Destination: ctrDirOrFile,
 			Type:        "bind",
 			Options:     []string{"bind", "rprivate"},
 		}
diff --git a/vendor/github.com/containers/buildah/pkg/unshare/unshare.go b/vendor/github.com/containers/buildah/pkg/unshare/unshare.go
index 33232740e..5a68d6b8d 100644
--- a/vendor/github.com/containers/buildah/pkg/unshare/unshare.go
+++ b/vendor/github.com/containers/buildah/pkg/unshare/unshare.go
@@ -64,6 +64,7 @@ func (c *Cmd) Start() error {
 	if os.Geteuid() != 0 {
 		c.Env = append(c.Env, "_CONTAINERS_USERNS_CONFIGURED=done")
 		c.Env = append(c.Env, fmt.Sprintf("_CONTAINERS_ROOTLESS_UID=%d", os.Geteuid()))
+		c.Env = append(c.Env, fmt.Sprintf("_CONTAINERS_ROOTLESS_GID=%d", os.Getegid()))
 	}
 
 	// Create the pipe for reading the child's PID.
@@ -183,6 +184,7 @@ func (c *Cmd) Start() error {
 			for _, m := range c.GidMappings {
 				fmt.Fprintf(g, "%d %d %d\n", m.ContainerID, m.HostID, m.Size)
 			}
+			gidmapSet := false
 			// Set the GID map.
 			if c.UseNewgidmap {
 				cmd := exec.Command("newgidmap", append([]string{pidString}, strings.Fields(strings.Replace(g.String(), "\n", " ", -1))...)...)
@@ -190,11 +192,16 @@ func (c *Cmd) Start() error {
 				cmd.Stdout = g
 				cmd.Stderr = g
 				err := cmd.Run()
-				if err != nil {
+				if err == nil {
+					gidmapSet = true
+				} else {
 					fmt.Fprintf(continueWrite, "error running newgidmap: %v: %s", err, g.String())
-					return errors.Wrapf(err, "error running newgidmap: %s", g.String())
+					fmt.Fprintf(continueWrite, "falling back to single mapping\n")
+					g.Reset()
+					g.Write([]byte(fmt.Sprintf("0 %d 1\n", os.Getegid())))
 				}
-			} else {
+			}
+			if !gidmapSet {
 				gidmap, err := os.OpenFile(fmt.Sprintf("/proc/%s/gid_map", pidString), os.O_TRUNC|os.O_WRONLY, 0)
 				if err != nil {
 					fmt.Fprintf(continueWrite, "error opening /proc/%s/gid_map: %v", pidString, err)
@@ -214,6 +221,7 @@ func (c *Cmd) Start() error {
 			for _, m := range c.UidMappings {
 				fmt.Fprintf(u, "%d %d %d\n", m.ContainerID, m.HostID, m.Size)
 			}
+			uidmapSet := false
 			// Set the GID map.
 			if c.UseNewuidmap {
 				cmd := exec.Command("newuidmap", append([]string{pidString}, strings.Fields(strings.Replace(u.String(), "\n", " ", -1))...)...)
@@ -221,11 +229,16 @@ func (c *Cmd) Start() error {
 				cmd.Stdout = u
 				cmd.Stderr = u
 				err := cmd.Run()
-				if err != nil {
+				if err == nil {
+					uidmapSet = true
+				} else {
 					fmt.Fprintf(continueWrite, "error running newuidmap: %v: %s", err, u.String())
-					return errors.Wrapf(err, "error running newuidmap: %s", u.String())
+					fmt.Fprintf(continueWrite, "falling back to single mapping\n")
+					u.Reset()
+					u.Write([]byte(fmt.Sprintf("0 %d 1\n", os.Geteuid())))
 				}
-			} else {
+			}
+			if !uidmapSet {
 				uidmap, err := os.OpenFile(fmt.Sprintf("/proc/%s/uid_map", pidString), os.O_TRUNC|os.O_WRONLY, 0)
 				if err != nil {
 					fmt.Fprintf(continueWrite, "error opening /proc/%s/uid_map: %v", pidString, err)
@@ -354,7 +367,9 @@ func MaybeReexecUsingUserNamespace(evenForRoot bool) {
 		// range in /etc/subuid and /etc/subgid file is a starting host
 		// ID and a range size.
 		uidmap, gidmap, err = GetSubIDMappings(me.Username, me.Username)
-		bailOnError(err, "error reading allowed ID mappings")
+		if err != nil {
+			logrus.Warnf("error reading allowed ID mappings: %v", err)
+		}
 		if len(uidmap) == 0 {
 			logrus.Warnf("Found no UID ranges set aside for user %q in /etc/subuid.", me.Username)
 		}
diff --git a/vendor/github.com/containers/buildah/run_linux.go b/vendor/github.com/containers/buildah/run_linux.go
index 81ce2b944..16c0550aa 100644
--- a/vendor/github.com/containers/buildah/run_linux.go
+++ b/vendor/github.com/containers/buildah/run_linux.go
@@ -131,7 +131,8 @@ func (b *Builder) Run(command []string, options RunOptions) error {
 		return err
 	}
 
-	if err := b.configureUIDGID(g, mountPoint, options); err != nil {
+	homeDir, err := b.configureUIDGID(g, mountPoint, options)
+	if err != nil {
 		return err
 	}
 
@@ -210,7 +211,7 @@ func (b *Builder) Run(command []string, options RunOptions) error {
 		}
 		err = b.runUsingRuntimeSubproc(isolation, options, configureNetwork, configureNetworks, moreCreateArgs, spec, mountPoint, path, Package+"-"+filepath.Base(path))
 	case IsolationChroot:
-		err = chroot.RunUsingChroot(spec, path, options.Stdin, options.Stdout, options.Stderr)
+		err = chroot.RunUsingChroot(spec, path, homeDir, options.Stdin, options.Stdout, options.Stderr)
 	case IsolationOCIRootless:
 		moreCreateArgs := []string{"--no-new-keyring"}
 		if options.NoPivot {
@@ -1454,7 +1455,18 @@ func setupNamespaces(g *generate.Generator, namespaceOptions NamespaceOptions, i
 	}
 	if configureNetwork {
 		for name, val := range util.DefaultNetworkSysctl {
-			g.AddLinuxSysctl(name, val)
+			// Check that the sysctl we are adding is actually supported
+			// by the kernel
+			p := filepath.Join("/proc/sys", strings.Replace(name, ".", "/", -1))
+			_, err := os.Stat(p)
+			if err != nil && !os.IsNotExist(err) {
+				return false, nil, false, errors.Wrapf(err, "cannot stat %s", p)
+			}
+			if err == nil {
+				g.AddLinuxSysctl(name, val)
+			} else {
+				logrus.Warnf("ignoring sysctl %s since %s doesn't exist", name, p)
+			}
 		}
 	}
 	return configureNetwork, configureNetworks, configureUTS, nil
@@ -1775,14 +1787,14 @@ func getDNSIP(dnsServers []string) (dns []net.IP, err error) {
 	return dns, nil
 }
 
-func (b *Builder) configureUIDGID(g *generate.Generator, mountPoint string, options RunOptions) error {
+func (b *Builder) configureUIDGID(g *generate.Generator, mountPoint string, options RunOptions) (string, error) {
 	// Set the user UID/GID/supplemental group list/capabilities lists.
-	user, err := b.user(mountPoint, options.User)
+	user, homeDir, err := b.user(mountPoint, options.User)
 	if err != nil {
-		return err
+		return "", err
 	}
 	if err := setupCapabilities(g, b.AddCapabilities, b.DropCapabilities, options.AddCapabilities, options.DropCapabilities); err != nil {
-		return err
+		return "", err
 	}
 	g.SetProcessUID(user.UID)
 	g.SetProcessGID(user.GID)
@@ -1797,7 +1809,7 @@ func (b *Builder) configureUIDGID(g *generate.Generator, mountPoint string, opti
 		g.Config.Process.Capabilities.Bounding = bounding
 	}
 
-	return nil
+	return homeDir, nil
 }
 
 func (b *Builder) configureEnvironment(g *generate.Generator, options RunOptions) {