Add --format option to skopeo inspect

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

vendor/github.com/containers/common/pkg/report/writer.go

@@ -0,0 +1,27 @@
+package report
+
+import (
+	"io"
+	"text/tabwriter"
+)
+
+// Writer aliases tabwriter.Writer to provide Podman defaults
+type Writer struct {
+	*tabwriter.Writer
+}
+
+// NewWriter initializes a new report.Writer with given values
+func NewWriter(output io.Writer, minwidth, tabwidth, padding int, padchar byte, flags uint) (*Writer, error) {
+	t := tabwriter.NewWriter(output, minwidth, tabwidth, padding, padchar, flags)
+	return &Writer{t}, nil
+}
+
+// NewWriterDefault initializes a new report.Writer with Podman defaults
+func NewWriterDefault(output io.Writer) (*Writer, error) {
+	return NewWriter(output, 12, 2, 2, ' ', 0)
+}
+
+// Flush any output left in buffers
+func (w *Writer) Flush() error {
+	return w.Writer.Flush()
+}