Vendor in containers/buildah v1.21.0

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

9 files changed, 317 insertions, 21 deletions

diff --git a/go.mod b/go.mod
index 29436b912..738902bad 100644
--- a/go.mod
+++ b/go.mod
@@ -11,7 +11,7 @@ require (
 	github.com/container-orchestrated-devices/container-device-interface v0.0.0-20210325223243-f99e8b6c10b9
 	github.com/containernetworking/cni v0.8.1
 	github.com/containernetworking/plugins v0.9.1
-	github.com/containers/buildah v1.20.2-0.20210519094241-c3a3fe847ee1
+	github.com/containers/buildah v1.21.0
 	github.com/containers/common v0.38.4
 	github.com/containers/conmon v2.0.20+incompatible
 	github.com/containers/image/v5 v5.12.0
diff --git a/go.sum b/go.sum
index 857f0c55c..bad1a8deb 100644
--- a/go.sum
+++ b/go.sum
@@ -215,9 +215,8 @@ github.com/containernetworking/plugins v0.8.6/go.mod h1:qnw5mN19D8fIwkqW7oHHYDHV
 github.com/containernetworking/plugins v0.8.7/go.mod h1:R7lXeZaBzpfqapcAbHRW8/CYwm0dHzbz0XEjofx0uB0=
 github.com/containernetworking/plugins v0.9.1 h1:FD1tADPls2EEi3flPc2OegIY1M9pUa9r2Quag7HMLV8=
 github.com/containernetworking/plugins v0.9.1/go.mod h1:xP/idU2ldlzN6m4p5LmGiwRDjeJr6FLK6vuiUwoH7P8=
-github.com/containers/buildah v1.20.2-0.20210519094241-c3a3fe847ee1 h1:XrHrbHwkTMmZCNhRglW4H3k8ApOWyupsSp5snJmsb24=
-github.com/containers/buildah v1.20.2-0.20210519094241-c3a3fe847ee1/go.mod h1:7qXQ9hVQxgkE3XCoCjtzrV0VKh5GzgugkQDfvFxcVus=
-github.com/containers/common v0.38.3/go.mod h1:egfpX/Y3+19Dz4Wa1eRZDdgzoEOeneieF9CQppKzLBg=
+github.com/containers/buildah v1.21.0 h1:LuwuqRPjan3X3AIdGwfkEkqMgmrDMNpQznFqNdHgCz8=
+github.com/containers/buildah v1.21.0/go.mod h1:yPdlpVd93T+i91yGxrJbW1YOWrqN64j5ZhHOZmHUejs=
 github.com/containers/common v0.38.4 h1:WYv4R6Sw1qiOPZtBNbKglrmisXdPcq3fZ3bGy4prrjo=
 github.com/containers/common v0.38.4/go.mod h1:egfpX/Y3+19Dz4Wa1eRZDdgzoEOeneieF9CQppKzLBg=
 github.com/containers/conmon v2.0.20+incompatible h1:YbCVSFSCqFjjVwHTPINGdMX1F6JXHGTUje2ZYobNrkg=
diff --git a/vendor/github.com/containers/buildah/CHANGELOG.md b/vendor/github.com/containers/buildah/CHANGELOG.md
index 25f02db19..7a0af9298 100644
--- a/vendor/github.com/containers/buildah/CHANGELOG.md
+++ b/vendor/github.com/containers/buildah/CHANGELOG.md
@@ -1,6 +1,225 @@
 ![buildah logo](https://cdn.rawgit.com/containers/buildah/master/logos/buildah-logo_large.png)
 
 # Changelog
+## v1.21.0 (2021-05-19)
+    Don't blow up if cpp detects errors
+    Vendor in containers/common v0.38.4
+    Remove 'buildah run --security-opt' from completion
+    update c/common
+    Fix handling of --default-mounts-file
+    update vendor of containers/storage v1.31.1
+    Bump github.com/containers/storage from 1.30.3 to 1.31.0
+    Send logrus messages back to caller when building
+    github: Fix bad repo. ref in workflow config
+    Check earlier for bad image tags name
+    buildah bud: fix containers/podman/issues/10307
+    Bump github.com/containers/storage from 1.30.1 to 1.30.3
+    Cirrus: Support [CI:DOCS] test skipping
+    Notification email for cirrus-cron build failures
+    Bump github.com/opencontainers/runc from 1.0.0-rc93 to 1.0.0-rc94
+    Fix race condition
+    Fix copy race while walking paths
+    Preserve ownership of lower directory when doing an overlay mount
+    Bump github.com/onsi/gomega from 1.11.0 to 1.12.0
+    Update nix pin with `make nixpkgs`
+    codespell cleanup
+    Multi-arch github-action workflow unification
+    Bump github.com/containers/image/v5 from 5.11.1 to 5.12.0
+    Bump github.com/onsi/ginkgo from 1.16.1 to 1.16.2
+    imagebuildah: ignore signatures when tagging images
+    update to latest libimage
+    Bump github.com/containers/common from 0.37.0 to 0.37.1
+    Bump github.com/containers/storage from 1.30.0 to 1.30.1
+    Upgrade to GitHub-native Dependabot
+    Document location of auth.json file if XDG_RUNTIME_DIR is not set
+    run.bats: fix flake in run-user test
+    Cirrus: Update F34beta -> F34
+    pr-should-include-tests: try to make work in buildah
+    runUsingRuntime: when relaying error from the runtime, mention that
+    Run(): avoid Mkdir() into the rootfs
+    imagebuildah: replace archive with chrootarchive
+    imagebuildah.StageExecutor.volumeCacheSaveVFS(): set up bind mounts
+    conformance: use :Z with transient mounts when SELinux is enabled
+    bud.bats: fix a bats warning
+    imagebuildah: create volume directories when using overlays
+    imagebuildah: drop resolveSymlink()
+    namespaces test - refactoring and cleanup
+    Refactor 'idmapping' system test
+    Cirrus: Update Ubuntu images to 21.04
+    Tiny fixes in bud system tests
+    Add compabitility wrappers for removed packages
+    Fix expected message at pulling image
+    Fix system tests of 'bud' subcommand
+    [CI:DOCS] Update steps for CentOS runc users
+    Add support for secret mounts
+    Add buildah manifest rm command
+    restore push/pull and util API
+    [CI:DOCS] Remove older distro docs
+    Rename rhel secrets to subscriptions
+    vendor in openshift/imagebuilder
+    Remove buildah bud --loglevel ...
+    use new containers/common/libimage package
+    Fix copier when using globs
+    Test namespace flags of 'bud' subcommand
+    Add system test of 'bud' subcommand
+    Output names of multiple tags in buildah bud
+    push to docker test: don't get fooled by podman
+    copier: add Remove()
+    build(deps): bump github.com/containers/image/v5 from 5.10.5 to 5.11.1
+    Restore log timestamps
+    Add system test of 'buildah help' with a tiny fix
+    tests: copy.bats: fix infinite hang
+    Do not force hard code to crun in rootless mode
+    build(deps): bump github.com/openshift/imagebuilder from 1.2.0 to 1.2.1
+    build(deps): bump github.com/containers/ocicrypt from 1.1.0 to 1.1.1
+    build(deps): bump github.com/containers/common from 0.35.4 to 0.36.0
+    Fix arg missing warning in bud
+    Check without flag in 'from --cgroup-parent' test
+    Minor fixes to Buildah as a library tutorial documentation
+    Add system test of 'buildah version' for packaged buildah
+    Add a few system tests of 'buildah from'
+    Log the final error with %+v at logging level "trace"
+    copier: add GetOptions.NoCrossDevice
+    Update nix pin with `make nixpkgs`
+    Bump to v1.20.2-dev
+
+## v1.20.1 (2021-04-13)
+    Run container with isolation type set at 'from'
+    bats helpers.bash - minor refactoring
+    Bump containers/storage vendor to v1.29.0
+    build(deps): bump github.com/onsi/ginkgo from 1.16.0 to 1.16.1
+    Cirrus: Update VMs w/ F34beta
+    CLI add/copy: add a --from option
+    build(deps): bump github.com/onsi/ginkgo from 1.15.2 to 1.16.0
+    Add authentication system tests for 'commit' and 'bud'
+    fix local image lookup for custom platform
+    Double-check existence of OCI runtimes
+    Cirrus: Make use of shared get_ci_vm container
+    Add system tests of "buildah run"
+    Update nix pin with `make nixpkgs`
+    Remove some stuttering on returns errors
+    Setup alias for --tty to --terminal
+    Add conformance tests for COPY /...
+    Put a few more minutes on the clock for the CI conformance test
+    Add a conformance test for COPY --from $symlink
+    Add conformance tests for COPY ""
+    Check for symlink in builtin volume
+    Sort all mounts by destination directory
+    System-test cleanup
+    Export parse.Platform string to be used by podman-remote
+    blobcache: fix sequencing error
+    build(deps): bump github.com/containers/common from 0.35.3 to 0.35.4
+    Fix URL in demos/buildah_multi_stage.sh
+    Add a few system tests
+    [NO TESTS NEEDED] Use --recurse-modules when building git context
+    Bump to v1.20.1-dev
+
+## v1.20.0 (2021-03-25)
+  * vendor in containers/storage v1.28.1
+  * build(deps): bump github.com/containers/common from 0.35.2 to 0.35.3
+  * tests: prefetch: use buildah, not podman, for pulls
+  * Use faster way to check image tag existence during multi-arch build
+  * Add information about multi-arch images to the Readme
+  * COPY --chown: expand the conformance test
+  * pkg/chrootuser: use a bufio.Scanner
+  * [CI:DOCS] Fix rootful typo in docs
+  * build(deps): bump github.com/onsi/ginkgo from 1.15.1 to 1.15.2
+  * Add documentation and testing for .containerignore
+  * build(deps): bump github.com/sirupsen/logrus from 1.8.0 to 1.8.1
+  * build(deps): bump github.com/hashicorp/go-multierror from 1.1.0 to 1.1.1
+  * Lookup Containerfile if user specifies a directory
+  * Add Tag format placeholder to docs
+  * copier: ignore sockets
+  * image: propagate errors from extractRootfs
+  * Remove system test of 'buildah containers -a'
+  * Clarify userns options are usable only as root in man pages
+  * Fix system test of 'containers -a'
+  * Remove duplicated code in addcopy
+  * build(deps): bump github.com/onsi/ginkgo from 1.15.0 to 1.15.1
+  * build(deps): bump github.com/onsi/gomega from 1.10.5 to 1.11.0
+  * build(deps): bump github.com/fsouza/go-dockerclient from 1.7.1 to 1.7.2
+  * Update multi-arch buildah build setup with new logic
+  * Update nix pin with `make nixpkgs`
+  * overlay.bats: fix the "overlay source permissions" test
+  * imagebuildah: use overlay for volumes when using overlay
+  * Make PolicyMap and PullPolicy names align
+  * copier: add GetOptions.IgnoreUnreadable
+  * Check local image to match system context
+  * fix: Containerfiles - smaller set of userns u/gids
+  * Set upperdir permissions based on source
+  * Shrink the vendoring size of pkc/cli
+  * Clarify image name match failure message
+  * ADD/COPY: create the destination directory first, chroot to it
+  * copier.GetOptions: add NoDerefSymLinks
+  * copier: add an Eval function
+  * Update system test for 'from --cap-add/drop'
+  * copier: fix a renaming bug
+  * copier: return child process stderr if we can't JSON decode the response
+  * Add some system tests
+  * build(deps): bump github.com/containers/storage from 1.26.0 to 1.27.0
+  * complement add/copy --chmod documentation
+  * buildah login and logout, do not need to enter user namespace
+  * Add multi-arch image build
+  * chmod/chown added/fixed in bash completions
+  * OWNERS: add @lsm5
+  * buildah add/copy --chmod dockerfile implementation
+  * bump github.com/openshift/imagebuilder from 1.1.8 to 1.2.0
+  * buildah add/copy --chmod cli implementation for files and urls
+  * Make sure we set the buildah version label
+  * Isolation strings, should match user input
+  * [CI:DOCS] buildah-from.md: remove dup arch,os
+  * build(deps): bump github.com/containers/image/v5 from 5.10.2 to 5.10.3
+  * Cirrus: Temp. disable prior-fedora (F32) testing
+  * pr-should-include-tests: recognized "renamed" tests
+  * build(deps): bump github.com/sirupsen/logrus from 1.7.0 to 1.8.0
+  * build(deps): bump github.com/fsouza/go-dockerclient from 1.7.0 to 1.7.1
+  * build(deps): bump github.com/containers/common from 0.34.2 to 0.35.0
+  * Fix reaping of stages with no instructions
+  * add stale bot
+  * Add base image name to comment
+  * build(deps): bump github.com/spf13/cobra from 1.1.1 to 1.1.3
+  * Don't fail copy to emptydir
+  * buildah: use volatile containers
+  * vendor: update containers/storage
+  * Eliminate the use of containers/building import in pkg subdirs
+  * Add more support for removing config
+  * Improve messages about --cache-from not being supported
+  * Revert patch to allow COPY/ADD of empty dirs.
+  * Don't fail copy to emptydir
+  * Fix tutorial for rootless mode
+  * Fix caching layers with build args
+  * Vendor in containers/image v5.10.2
+  * build(deps): bump github.com/containers/common from 0.34.0 to 0.34.2
+  * build(deps): bump github.com/onsi/ginkgo from 1.14.2 to 1.15.0
+  * 'make validate': require PRs to include tests
+  * build(deps): bump github.com/onsi/gomega from 1.10.4 to 1.10.5
+  * build(deps): bump github.com/containers/storage from 1.24.5 to 1.25.0
+  * Use chown function for U volume flag from containers/common repository
+  * --iidfile: print hash prefix
+  * bump containernetworking/cni to v0.8.1 - fix for CVE-2021-20206
+  * run: fix check for host pid namespace
+  * Finish plumbing for buildah bud --manifest
+  * buildah manifest add localimage should work
+  * Stop testing directory permissions with latest docker
+  * Fix build arg check
+  * build(deps): bump github.com/containers/ocicrypt from 1.0.3 to 1.1.0
+  * [ci:docs] Fix man page for buildah push
+  * Update nix pin with `make nixpkgs`
+  * Bump to containers/image v5.10.1
+  * Rebuild layer if a change in ARG is detected
+  * Bump golang.org/x/crypto to the latest
+  * Add Ashley and Urvashi to Approvers
+  * local image lookup by digest
+  * Use build-arg ENV val from local environment if set
+  * Pick default OCI Runtime from containers.conf
+  * Added required devel packages
+  * Cirrus: Native OSX Build
+  * Cirrus: Two minor cleanup items
+  * Workaround for RHEL gating test failure
+  * build(deps): bump github.com/stretchr/testify from 1.6.1 to 1.7.0
+  * build(deps): bump github.com/mattn/go-shellwords from 1.0.10 to 1.0.11
+  * Reset upstream branch to dev version
+  * If destination does not exists, do not throw error
 
 ## v1.19.0 (2021-01-08)
     Update vendor of containers/storage and containers/common
diff --git a/vendor/github.com/containers/buildah/changelog.txt b/vendor/github.com/containers/buildah/changelog.txt
index 7d31c854d..3bde05a3e 100644
--- a/vendor/github.com/containers/buildah/changelog.txt
+++ b/vendor/github.com/containers/buildah/changelog.txt
@@ -1,3 +1,85 @@
+- Changelog for v1.21.0 (2021-05-19)
+  * Don't blow up if cpp detects errors
+  * Vendor in containers/common v0.38.4
+  * Remove 'buildah run --security-opt' from completion
+  * update c/common
+  * Fix handling of --default-mounts-file
+  * update vendor of containers/storage v1.31.1
+  * Bump github.com/containers/storage from 1.30.3 to 1.31.0
+  * Send logrus messages back to caller when building
+  * github: Fix bad repo. ref in workflow config
+  * Check earlier for bad image tags name
+  * buildah bud: fix containers/podman/issues/10307
+  * Bump github.com/containers/storage from 1.30.1 to 1.30.3
+  * Cirrus: Support [CI:DOCS] test skipping
+  * Notification email for cirrus-cron build failures
+  * Bump github.com/opencontainers/runc from 1.0.0-rc93 to 1.0.0-rc94
+  * Fix race condition
+  * Fix copy race while walking paths
+  * Preserve ownership of lower directory when doing an overlay mount
+  * Bump github.com/onsi/gomega from 1.11.0 to 1.12.0
+  * Update nix pin with `make nixpkgs`
+  * codespell cleanup
+  * Multi-arch github-action workflow unification
+  * Bump github.com/containers/image/v5 from 5.11.1 to 5.12.0
+  * Bump github.com/onsi/ginkgo from 1.16.1 to 1.16.2
+  * imagebuildah: ignore signatures when tagging images
+  * update to latest libimage
+  * Bump github.com/containers/common from 0.37.0 to 0.37.1
+  * Bump github.com/containers/storage from 1.30.0 to 1.30.1
+  * Upgrade to GitHub-native Dependabot
+  * Document location of auth.json file if XDG_RUNTIME_DIR is not set
+  * run.bats: fix flake in run-user test
+  * Cirrus: Update F34beta -> F34
+  * pr-should-include-tests: try to make work in buildah
+  * runUsingRuntime: when relaying error from the runtime, mention that
+  * Run(): avoid Mkdir() into the rootfs
+  * imagebuildah: replace archive with chrootarchive
+  * imagebuildah.StageExecutor.volumeCacheSaveVFS(): set up bind mounts
+  * conformance: use :Z with transient mounts when SELinux is enabled
+  * bud.bats: fix a bats warning
+  * imagebuildah: create volume directories when using overlays
+  * imagebuildah: drop resolveSymlink()
+  * namespaces test - refactoring and cleanup
+  * Refactor 'idmapping' system test
+  * Cirrus: Update Ubuntu images to 21.04
+  * Tiny fixes in bud system tests
+  * Add compabitility wrappers for removed packages
+  * Fix expected message at pulling image
+  * Fix system tests of 'bud' subcommand
+  * [CI:DOCS] Update steps for CentOS runc users
+  * Add support for secret mounts
+  * Add buildah manifest rm command
+  * restore push/pull and util API
+  * [CI:DOCS] Remove older distro docs
+  * Rename rhel secrets to subscriptions
+  * vendor in openshift/imagebuilder
+  * Remove buildah bud --loglevel ...
+  * use new containers/common/libimage package
+  * Fix copier when using globs
+  * Test namespace flags of 'bud' subcommand
+  * Add system test of 'bud' subcommand
+  * Output names of multiple tags in buildah bud
+  * push to docker test: don't get fooled by podman
+  * copier: add Remove()
+  * build(deps): bump github.com/containers/image/v5 from 5.10.5 to 5.11.1
+  * Restore log timestamps
+  * Add system test of 'buildah help' with a tiny fix
+  * tests: copy.bats: fix infinite hang
+  * Do not force hard code to crun in rootless mode
+  * build(deps): bump github.com/openshift/imagebuilder from 1.2.0 to 1.2.1
+  * build(deps): bump github.com/containers/ocicrypt from 1.1.0 to 1.1.1
+  * build(deps): bump github.com/containers/common from 0.35.4 to 0.36.0
+  * Fix arg missing warning in bud
+  * Check without flag in 'from --cgroup-parent' test
+  * Minor fixes to Buildah as a library tutorial documentation
+  * Add system test of 'buildah version' for packaged buildah
+  * Add a few system tests of 'buildah from'
+  * Log the final error with %+v at logging level "trace"
+  * copier: add GetOptions.NoCrossDevice
+  * Update nix pin with `make nixpkgs`
+  * Bump to v1.20.2-dev
+
 - Changelog for v1.20.1 (2021-04-13)
   * Run container with isolation type set at 'from'
   * bats helpers.bash - minor refactoring
diff --git a/vendor/github.com/containers/buildah/define/types.go b/vendor/github.com/containers/buildah/define/types.go
index 45e85e138..f2327e8df 100644
--- a/vendor/github.com/containers/buildah/define/types.go
+++ b/vendor/github.com/containers/buildah/define/types.go
@@ -28,7 +28,7 @@ const (
 	Package = "buildah"
 	// Version for the Package.  Bump version in contrib/rpm/buildah.spec
 	// too.
-	Version = "1.20.2-dev"
+	Version = "1.21.0"
 
 	// DefaultRuntime if containers.conf fails.
 	DefaultRuntime = "runc"
diff --git a/vendor/github.com/containers/buildah/go.mod b/vendor/github.com/containers/buildah/go.mod
index 1ff94c922..21575cec2 100644
--- a/vendor/github.com/containers/buildah/go.mod
+++ b/vendor/github.com/containers/buildah/go.mod
@@ -4,7 +4,7 @@ go 1.12
 
 require (
 	github.com/containernetworking/cni v0.8.1
-	github.com/containers/common v0.38.3
+	github.com/containers/common v0.38.4
 	github.com/containers/image/v5 v5.12.0
 	github.com/containers/ocicrypt v1.1.1
 	github.com/containers/storage v1.31.1
diff --git a/vendor/github.com/containers/buildah/go.sum b/vendor/github.com/containers/buildah/go.sum
index 235838b4e..0a09fcd6f 100644
--- a/vendor/github.com/containers/buildah/go.sum
+++ b/vendor/github.com/containers/buildah/go.sum
@@ -201,8 +201,8 @@ github.com/containernetworking/cni v0.8.1 h1:7zpDnQ3T3s4ucOuJ/ZCLrYBxzkg0AELFfII
 github.com/containernetworking/cni v0.8.1/go.mod h1:LGwApLUm2FpoOfxTDEeq8T9ipbpZ61X79hmU3w8FmsY=
 github.com/containernetworking/plugins v0.8.6/go.mod h1:qnw5mN19D8fIwkqW7oHHYDHVlzhJpcY6TQxn/fUyDDM=
 github.com/containernetworking/plugins v0.9.1/go.mod h1:xP/idU2ldlzN6m4p5LmGiwRDjeJr6FLK6vuiUwoH7P8=
-github.com/containers/common v0.38.3 h1:kbdGw+weGFjZLhWd8Gsv+BlaTLx7gYDDS5lh4qc+Lfk=
-github.com/containers/common v0.38.3/go.mod h1:egfpX/Y3+19Dz4Wa1eRZDdgzoEOeneieF9CQppKzLBg=
+github.com/containers/common v0.38.4 h1:WYv4R6Sw1qiOPZtBNbKglrmisXdPcq3fZ3bGy4prrjo=
+github.com/containers/common v0.38.4/go.mod h1:egfpX/Y3+19Dz4Wa1eRZDdgzoEOeneieF9CQppKzLBg=
 github.com/containers/image/v5 v5.12.0 h1:1hNS2QkzFQ4lH3GYQLyAXB0acRMhS1Ubm6oV++8vw4w=
 github.com/containers/image/v5 v5.12.0/go.mod h1:VasTuHmOw+uD0oHCfApQcMO2+36SfyncoSahU7513Xs=
 github.com/containers/libtrust v0.0.0-20190913040956-14b96171aa3b h1:Q8ePgVfHDplZ7U33NwHZkrVELsZP5fYj9pM5WBZB2GE=
diff --git a/vendor/github.com/containers/buildah/imagebuildah/build.go b/vendor/github.com/containers/buildah/imagebuildah/build.go
index 76796de72..bfbbb085d 100644
--- a/vendor/github.com/containers/buildah/imagebuildah/build.go
+++ b/vendor/github.com/containers/buildah/imagebuildah/build.go
@@ -133,7 +133,7 @@ func BuildDockerfiles(ctx context.Context, store storage.Store, options define.B
 
 		// pre-process Dockerfiles with ".in" suffix
 		if strings.HasSuffix(dfile, ".in") {
-			pData, err := preprocessDockerfileContents(data, options.ContextDirectory)
+			pData, err := preprocessContainerfileContents(dfile, data, options.ContextDirectory)
 			if err != nil {
 				return "", nil, err
 			}
@@ -206,15 +206,15 @@ func warnOnUnsetBuildArgs(logger *logrus.Logger, node *parser.Node, args map[str
 	}
 }
 
-// preprocessDockerfileContents runs CPP(1) in preprocess-only mode on the input
+// preprocessContainerfileContents runs CPP(1) in preprocess-only mode on the input
 // dockerfile content and will use ctxDir as the base include path.
 //
 // Note: we cannot use cmd.StdoutPipe() as cmd.Wait() closes it.
-func preprocessDockerfileContents(r io.Reader, ctxDir string) (rdrCloser *io.ReadCloser, err error) {
+func preprocessContainerfileContents(containerfile string, r io.Reader, ctxDir string) (rdrCloser *io.ReadCloser, err error) {
 	cppPath := "/usr/bin/cpp"
 	if _, err = os.Stat(cppPath); err != nil {
 		if os.IsNotExist(err) {
-			err = errors.Errorf("error: Dockerfile.in support requires %s to be installed", cppPath)
+			err = errors.Errorf("error: %s support requires %s to be installed", containerfile, cppPath)
 		}
 		return nil, err
 	}
@@ -231,11 +231,7 @@ func preprocessDockerfileContents(r io.Reader, ctxDir string) (rdrCloser *io.Rea
 		return nil, err
 	}
 
-	defer func() {
-		if err != nil {
-			pipe.Close()
-		}
-	}()
+	defer pipe.Close()
 
 	if err = cmd.Start(); err != nil {
 		return nil, err
@@ -247,10 +243,10 @@ func preprocessDockerfileContents(r io.Reader, ctxDir string) (rdrCloser *io.Rea
 
 	pipe.Close()
 	if err = cmd.Wait(); err != nil {
-		if stderr.Len() > 0 {
-			err = errors.Wrapf(err, "%v", strings.TrimSpace(stderr.String()))
+		if stdout.Len() == 0 {
+			return nil, errors.Wrapf(err, "error pre-processing Dockerfile")
 		}
-		return nil, errors.Wrapf(err, "error pre-processing Dockerfile")
+		logrus.Warnf("Ignoring %s\n", stderr.String())
 	}
 
 	rc := ioutil.NopCloser(bytes.NewReader(stdout.Bytes()))
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 35828c06b..a3e2ad7d4 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -75,7 +75,7 @@ github.com/containernetworking/plugins/pkg/utils/hwaddr
 github.com/containernetworking/plugins/pkg/utils/sysctl
 github.com/containernetworking/plugins/plugins/ipam/host-local/backend
 github.com/containernetworking/plugins/plugins/ipam/host-local/backend/allocator
-# github.com/containers/buildah v1.20.2-0.20210519094241-c3a3fe847ee1
+# github.com/containers/buildah v1.21.0
 github.com/containers/buildah
 github.com/containers/buildah/bind
 github.com/containers/buildah/chroot