Cirrus: add vendor_check_task

* Make sure that all vendored dependencies are in sync with the code and
  the vendor.conf by running `make vendor` with a follow-up status check
  of the git tree.

* Vendor ginkgo and gomega to include the test dependencies.

Signed-off-by: Chris Evic <cevich@redhat.com>
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

vendor/github.com/onsi/gomega/gbytes/io_wrappers.go

@@ -0,0 +1,85 @@
+package gbytes
+
+import (
+	"errors"
+	"io"
+	"time"
+)
+
+// ErrTimeout is returned by TimeoutCloser, TimeoutReader, and TimeoutWriter when the underlying Closer/Reader/Writer does not return within the specified timeout
+var ErrTimeout = errors.New("timeout occurred")
+
+// TimeoutCloser returns an io.Closer that wraps the passed-in io.Closer.  If the underlying Closer fails to close within the alloted timeout ErrTimeout is returned.
+func TimeoutCloser(c io.Closer, timeout time.Duration) io.Closer {
+	return timeoutReaderWriterCloser{c: c, d: timeout}
+}
+
+// TimeoutReader returns an io.Reader that wraps the passed-in io.Reader.  If the underlying Reader fails to read within the alloted timeout ErrTimeout is returned.
+func TimeoutReader(r io.Reader, timeout time.Duration) io.Reader {
+	return timeoutReaderWriterCloser{r: r, d: timeout}
+}
+
+// TimeoutWriter returns an io.Writer that wraps the passed-in io.Writer.  If the underlying Writer fails to write within the alloted timeout ErrTimeout is returned.
+func TimeoutWriter(w io.Writer, timeout time.Duration) io.Writer {
+	return timeoutReaderWriterCloser{w: w, d: timeout}
+}
+
+type timeoutReaderWriterCloser struct {
+	c io.Closer
+	w io.Writer
+	r io.Reader
+	d time.Duration
+}
+
+func (t timeoutReaderWriterCloser) Close() error {
+	done := make(chan struct{})
+	var err error
+
+	go func() {
+		err = t.c.Close()
+		close(done)
+	}()
+
+	select {
+	case <-done:
+		return err
+	case <-time.After(t.d):
+		return ErrTimeout
+	}
+}
+
+func (t timeoutReaderWriterCloser) Read(p []byte) (int, error) {
+	done := make(chan struct{})
+	var n int
+	var err error
+
+	go func() {
+		n, err = t.r.Read(p)
+		close(done)
+	}()
+
+	select {
+	case <-done:
+		return n, err
+	case <-time.After(t.d):
+		return 0, ErrTimeout
+	}
+}
+
+func (t timeoutReaderWriterCloser) Write(p []byte) (int, error) {
+	done := make(chan struct{})
+	var n int
+	var err error
+
+	go func() {
+		n, err = t.w.Write(p)
+		close(done)
+	}()
+
+	select {
+	case <-done:
+		return n, err
+	case <-time.After(t.d):
+		return 0, ErrTimeout
+	}
+}