Build and install from GOPATH

* Rename 'vendor/src' -> 'vendor'
  * Ignore vendor/ instead of vendor/src/ for lint
* Rename 'cmd/client' -> 'cmd/ocic' to make it 'go install'able
* Rename 'cmd/server' -> 'cmd/ocid' to make it 'go install'able
* Update Makefile to build and install from GOPATH
* Update tests to locate ocid/ocic in GOPATH/bin
* Search for binaries in GOPATH/bin instead of PATH
* Install tools using `go get -u`, so they are updated on each run

Signed-off-by: Jonathan Yu <jawnsy@redhat.com>

vendor/github.com/containers/storage/pkg/chrootarchive/archive.go

@@ -0,0 +1,97 @@
+package chrootarchive
+
+import (
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+
+	"github.com/containers/storage/pkg/archive"
+	"github.com/containers/storage/pkg/idtools"
+)
+
+var chrootArchiver = &archive.Archiver{Untar: Untar}
+
+// Untar reads a stream of bytes from `archive`, parses it as a tar archive,
+// and unpacks it into the directory at `dest`.
+// The archive may be compressed with one of the following algorithms:
+//  identity (uncompressed), gzip, bzip2, xz.
+func Untar(tarArchive io.Reader, dest string, options *archive.TarOptions) error {
+	return untarHandler(tarArchive, dest, options, true)
+}
+
+// UntarUncompressed reads a stream of bytes from `archive`, parses it as a tar archive,
+// and unpacks it into the directory at `dest`.
+// The archive must be an uncompressed stream.
+func UntarUncompressed(tarArchive io.Reader, dest string, options *archive.TarOptions) error {
+	return untarHandler(tarArchive, dest, options, false)
+}
+
+// Handler for teasing out the automatic decompression
+func untarHandler(tarArchive io.Reader, dest string, options *archive.TarOptions, decompress bool) error {
+
+	if tarArchive == nil {
+		return fmt.Errorf("Empty archive")
+	}
+	if options == nil {
+		options = &archive.TarOptions{}
+	}
+	if options.ExcludePatterns == nil {
+		options.ExcludePatterns = []string{}
+	}
+
+	rootUID, rootGID, err := idtools.GetRootUIDGID(options.UIDMaps, options.GIDMaps)
+	if err != nil {
+		return err
+	}
+
+	dest = filepath.Clean(dest)
+	if _, err := os.Stat(dest); os.IsNotExist(err) {
+		if err := idtools.MkdirAllNewAs(dest, 0755, rootUID, rootGID); err != nil {
+			return err
+		}
+	}
+
+	r := ioutil.NopCloser(tarArchive)
+	if decompress {
+		decompressedArchive, err := archive.DecompressStream(tarArchive)
+		if err != nil {
+			return err
+		}
+		defer decompressedArchive.Close()
+		r = decompressedArchive
+	}
+
+	return invokeUnpack(r, dest, options)
+}
+
+// TarUntar is a convenience function which calls Tar and Untar, with the output of one piped into the other.
+// If either Tar or Untar fails, TarUntar aborts and returns the error.
+func TarUntar(src, dst string) error {
+	return chrootArchiver.TarUntar(src, dst)
+}
+
+// CopyWithTar creates a tar archive of filesystem path `src`, and
+// unpacks it at filesystem path `dst`.
+// The archive is streamed directly with fixed buffering and no
+// intermediary disk IO.
+func CopyWithTar(src, dst string) error {
+	return chrootArchiver.CopyWithTar(src, dst)
+}
+
+// CopyFileWithTar emulates the behavior of the 'cp' command-line
+// for a single file. It copies a regular file from path `src` to
+// path `dst`, and preserves all its metadata.
+//
+// If `dst` ends with a trailing slash '/' ('\' on Windows), the final
+// destination path will be `dst/base(src)` or `dst\base(src)`
+func CopyFileWithTar(src, dst string) (err error) {
+	return chrootArchiver.CopyFileWithTar(src, dst)
+}
+
+// UntarPath is a convenience function which looks for an archive
+// at filesystem path `src`, and unpacks it at `dst`.
+func UntarPath(src, dst string) error {
+	return chrootArchiver.UntarPath(src, dst)
+}