Initial checkin from CRI-O repo

Signed-off-by: Matthew Heon <matthew.heon@gmail.com>

7 files changed, 546 insertions, 0 deletions

diff --git a/vendor/k8s.io/kubernetes/pkg/util/term/resize.go b/vendor/k8s.io/kubernetes/pkg/util/term/resize.go
new file mode 100644
index 000000000..7ca09a858
--- /dev/null
+++ b/vendor/k8s.io/kubernetes/pkg/util/term/resize.go
@@ -0,0 +1,132 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package term
+
+import (
+	"fmt"
+
+	"github.com/docker/docker/pkg/term"
+	"k8s.io/apimachinery/pkg/util/runtime"
+	"k8s.io/client-go/tools/remotecommand"
+)
+
+// GetSize returns the current size of the user's terminal. If it isn't a terminal,
+// nil is returned.
+func (t TTY) GetSize() *remotecommand.TerminalSize {
+	outFd, isTerminal := term.GetFdInfo(t.Out)
+	if !isTerminal {
+		return nil
+	}
+	return GetSize(outFd)
+}
+
+// GetSize returns the current size of the terminal associated with fd.
+func GetSize(fd uintptr) *remotecommand.TerminalSize {
+	winsize, err := term.GetWinsize(fd)
+	if err != nil {
+		runtime.HandleError(fmt.Errorf("unable to get terminal size: %v", err))
+		return nil
+	}
+
+	return &remotecommand.TerminalSize{Width: winsize.Width, Height: winsize.Height}
+}
+
+// MonitorSize monitors the terminal's size. It returns a TerminalSizeQueue primed with
+// initialSizes, or nil if there's no TTY present.
+func (t *TTY) MonitorSize(initialSizes ...*remotecommand.TerminalSize) remotecommand.TerminalSizeQueue {
+	outFd, isTerminal := term.GetFdInfo(t.Out)
+	if !isTerminal {
+		return nil
+	}
+
+	t.sizeQueue = &sizeQueue{
+		t: *t,
+		// make it buffered so we can send the initial terminal sizes without blocking, prior to starting
+		// the streaming below
+		resizeChan:   make(chan remotecommand.TerminalSize, len(initialSizes)),
+		stopResizing: make(chan struct{}),
+	}
+
+	t.sizeQueue.monitorSize(outFd, initialSizes...)
+
+	return t.sizeQueue
+}
+
+// sizeQueue implements remotecommand.TerminalSizeQueue
+type sizeQueue struct {
+	t TTY
+	// resizeChan receives a Size each time the user's terminal is resized.
+	resizeChan   chan remotecommand.TerminalSize
+	stopResizing chan struct{}
+}
+
+// make sure sizeQueue implements the resize.TerminalSizeQueue interface
+var _ remotecommand.TerminalSizeQueue = &sizeQueue{}
+
+// monitorSize primes resizeChan with initialSizes and then monitors for resize events. With each
+// new event, it sends the current terminal size to resizeChan.
+func (s *sizeQueue) monitorSize(outFd uintptr, initialSizes ...*remotecommand.TerminalSize) {
+	// send the initial sizes
+	for i := range initialSizes {
+		if initialSizes[i] != nil {
+			s.resizeChan <- *initialSizes[i]
+		}
+	}
+
+	resizeEvents := make(chan remotecommand.TerminalSize, 1)
+
+	monitorResizeEvents(outFd, resizeEvents, s.stopResizing)
+
+	// listen for resize events in the background
+	go func() {
+		defer runtime.HandleCrash()
+
+		for {
+			select {
+			case size, ok := <-resizeEvents:
+				if !ok {
+					return
+				}
+
+				select {
+				// try to send the size to resizeChan, but don't block
+				case s.resizeChan <- size:
+					// send successful
+				default:
+					// unable to send / no-op
+				}
+			case <-s.stopResizing:
+				return
+			}
+		}
+	}()
+}
+
+// Next returns the new terminal size after the terminal has been resized. It returns nil when
+// monitoring has been stopped.
+func (s *sizeQueue) Next() *remotecommand.TerminalSize {
+	size, ok := <-s.resizeChan
+	if !ok {
+		return nil
+	}
+	return &size
+}
+
+// stop stops the background goroutine that is monitoring for terminal resizes.
+func (s *sizeQueue) stop() {
+	close(s.stopResizing)
+}
diff --git a/vendor/k8s.io/kubernetes/pkg/util/term/resizeevents.go b/vendor/k8s.io/kubernetes/pkg/util/term/resizeevents.go
new file mode 100644
index 000000000..75e9690df
--- /dev/null
+++ b/vendor/k8s.io/kubernetes/pkg/util/term/resizeevents.go
@@ -0,0 +1,61 @@
+// +build !windows
+
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package term
+
+import (
+	"os"
+	"os/signal"
+	"syscall"
+
+	"k8s.io/apimachinery/pkg/util/runtime"
+	"k8s.io/client-go/tools/remotecommand"
+)
+
+// monitorResizeEvents spawns a goroutine that waits for SIGWINCH signals (these indicate the
+// terminal has resized). After receiving a SIGWINCH, this gets the terminal size and tries to send
+// it to the resizeEvents channel. The goroutine stops when the stop channel is closed.
+func monitorResizeEvents(fd uintptr, resizeEvents chan<- remotecommand.TerminalSize, stop chan struct{}) {
+	go func() {
+		defer runtime.HandleCrash()
+
+		winch := make(chan os.Signal, 1)
+		signal.Notify(winch, syscall.SIGWINCH)
+		defer signal.Stop(winch)
+
+		for {
+			select {
+			case <-winch:
+				size := GetSize(fd)
+				if size == nil {
+					return
+				}
+
+				// try to send size
+				select {
+				case resizeEvents <- *size:
+					// success
+				default:
+					// not sent
+				}
+			case <-stop:
+				return
+			}
+		}
+	}()
+}
diff --git a/vendor/k8s.io/kubernetes/pkg/util/term/resizeevents_windows.go b/vendor/k8s.io/kubernetes/pkg/util/term/resizeevents_windows.go
new file mode 100644
index 000000000..adccf8734
--- /dev/null
+++ b/vendor/k8s.io/kubernetes/pkg/util/term/resizeevents_windows.go
@@ -0,0 +1,62 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package term
+
+import (
+	"time"
+
+	"k8s.io/apimachinery/pkg/util/runtime"
+	"k8s.io/client-go/tools/remotecommand"
+)
+
+// monitorResizeEvents spawns a goroutine that periodically gets the terminal size and tries to send
+// it to the resizeEvents channel if the size has changed. The goroutine stops when the stop channel
+// is closed.
+func monitorResizeEvents(fd uintptr, resizeEvents chan<- remotecommand.TerminalSize, stop chan struct{}) {
+	go func() {
+		defer runtime.HandleCrash()
+
+		size := GetSize(fd)
+		if size == nil {
+			return
+		}
+		lastSize := *size
+
+		for {
+			// see if we need to stop running
+			select {
+			case <-stop:
+				return
+			default:
+			}
+
+			size := GetSize(fd)
+			if size == nil {
+				return
+			}
+
+			if size.Height != lastSize.Height || size.Width != lastSize.Width {
+				lastSize.Height = size.Height
+				lastSize.Width = size.Width
+				resizeEvents <- *size
+			}
+
+			// sleep to avoid hot looping
+			time.Sleep(250 * time.Millisecond)
+		}
+	}()
+}
diff --git a/vendor/k8s.io/kubernetes/pkg/util/term/setsize.go b/vendor/k8s.io/kubernetes/pkg/util/term/setsize.go
new file mode 100644
index 000000000..8cccd431a
--- /dev/null
+++ b/vendor/k8s.io/kubernetes/pkg/util/term/setsize.go
@@ -0,0 +1,29 @@
+// +build !windows
+
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package term
+
+import (
+	"github.com/docker/docker/pkg/term"
+	"k8s.io/client-go/tools/remotecommand"
+)
+
+// SetSize sets the terminal size associated with fd.
+func SetSize(fd uintptr, size remotecommand.TerminalSize) error {
+	return term.SetWinsize(fd, &term.Winsize{Height: size.Height, Width: size.Width})
+}
diff --git a/vendor/k8s.io/kubernetes/pkg/util/term/setsize_unsupported.go b/vendor/k8s.io/kubernetes/pkg/util/term/setsize_unsupported.go
new file mode 100644
index 000000000..82220217a
--- /dev/null
+++ b/vendor/k8s.io/kubernetes/pkg/util/term/setsize_unsupported.go
@@ -0,0 +1,28 @@
+// +build windows
+
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package term
+
+import (
+	"k8s.io/client-go/tools/remotecommand"
+)
+
+func SetSize(fd uintptr, size remotecommand.TerminalSize) error {
+	// NOP
+	return nil
+}
diff --git a/vendor/k8s.io/kubernetes/pkg/util/term/term.go b/vendor/k8s.io/kubernetes/pkg/util/term/term.go
new file mode 100644
index 000000000..58baee831
--- /dev/null
+++ b/vendor/k8s.io/kubernetes/pkg/util/term/term.go
@@ -0,0 +1,110 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package term
+
+import (
+	"io"
+	"os"
+
+	"github.com/docker/docker/pkg/term"
+
+	"k8s.io/kubernetes/pkg/util/interrupt"
+)
+
+// SafeFunc is a function to be invoked by TTY.
+type SafeFunc func() error
+
+// TTY helps invoke a function and preserve the state of the terminal, even if the process is
+// terminated during execution. It also provides support for terminal resizing for remote command
+// execution/attachment.
+type TTY struct {
+	// In is a reader representing stdin. It is a required field.
+	In io.Reader
+	// Out is a writer representing stdout. It must be set to support terminal resizing. It is an
+	// optional field.
+	Out io.Writer
+	// Raw is true if the terminal should be set raw.
+	Raw bool
+	// TryDev indicates the TTY should try to open /dev/tty if the provided input
+	// is not a file descriptor.
+	TryDev bool
+	// Parent is an optional interrupt handler provided to this function - if provided
+	// it will be invoked after the terminal state is restored. If it is not provided,
+	// a signal received during the TTY will result in os.Exit(0) being invoked.
+	Parent *interrupt.Handler
+
+	// sizeQueue is set after a call to MonitorSize() and is used to monitor SIGWINCH signals when the
+	// user's terminal resizes.
+	sizeQueue *sizeQueue
+}
+
+// IsTerminalIn returns true if t.In is a terminal. Does not check /dev/tty
+// even if TryDev is set.
+func (t TTY) IsTerminalIn() bool {
+	return IsTerminal(t.In)
+}
+
+// IsTerminalOut returns true if t.Out is a terminal. Does not check /dev/tty
+// even if TryDev is set.
+func (t TTY) IsTerminalOut() bool {
+	return IsTerminal(t.Out)
+}
+
+// IsTerminal returns whether the passed object is a terminal or not
+func IsTerminal(i interface{}) bool {
+	_, terminal := term.GetFdInfo(i)
+	return terminal
+}
+
+// Safe invokes the provided function and will attempt to ensure that when the
+// function returns (or a termination signal is sent) that the terminal state
+// is reset to the condition it was in prior to the function being invoked. If
+// t.Raw is true the terminal will be put into raw mode prior to calling the function.
+// If the input file descriptor is not a TTY and TryDev is true, the /dev/tty file
+// will be opened (if available).
+func (t TTY) Safe(fn SafeFunc) error {
+	inFd, isTerminal := term.GetFdInfo(t.In)
+
+	if !isTerminal && t.TryDev {
+		if f, err := os.Open("/dev/tty"); err == nil {
+			defer f.Close()
+			inFd = f.Fd()
+			isTerminal = term.IsTerminal(inFd)
+		}
+	}
+	if !isTerminal {
+		return fn()
+	}
+
+	var state *term.State
+	var err error
+	if t.Raw {
+		state, err = term.MakeRaw(inFd)
+	} else {
+		state, err = term.SaveState(inFd)
+	}
+	if err != nil {
+		return err
+	}
+	return interrupt.Chain(t.Parent, func() {
+		if t.sizeQueue != nil {
+			t.sizeQueue.stop()
+		}
+
+		term.RestoreTerminal(inFd, state)
+	}).Run(fn)
+}
diff --git a/vendor/k8s.io/kubernetes/pkg/util/term/term_writer.go b/vendor/k8s.io/kubernetes/pkg/util/term/term_writer.go
new file mode 100644
index 000000000..2d72d1e45
--- /dev/null
+++ b/vendor/k8s.io/kubernetes/pkg/util/term/term_writer.go
@@ -0,0 +1,124 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package term
+
+import (
+	"io"
+	"os"
+
+	"github.com/docker/docker/pkg/term"
+	wordwrap "github.com/mitchellh/go-wordwrap"
+)
+
+type wordWrapWriter struct {
+	limit  uint
+	writer io.Writer
+}
+
+// NewResponsiveWriter creates a Writer that detects the column width of the
+// terminal we are in, and adjusts every line width to fit and use recommended
+// terminal sizes for better readability. Does proper word wrapping automatically.
+//    if terminal width >= 120 columns		use 120 columns
+//    if terminal width >= 100 columns		use 100 columns
+//    if terminal width >=  80 columns		use  80 columns
+// In case we're not in a terminal or if it's smaller than 80 columns width,
+// doesn't do any wrapping.
+func NewResponsiveWriter(w io.Writer) io.Writer {
+	file, ok := w.(*os.File)
+	if !ok {
+		return w
+	}
+	fd := file.Fd()
+	if !term.IsTerminal(fd) {
+		return w
+	}
+
+	terminalSize := GetSize(fd)
+	if terminalSize == nil {
+		return w
+	}
+
+	var limit uint
+	switch {
+	case terminalSize.Width >= 120:
+		limit = 120
+	case terminalSize.Width >= 100:
+		limit = 100
+	case terminalSize.Width >= 80:
+		limit = 80
+	}
+
+	return NewWordWrapWriter(w, limit)
+}
+
+// NewWordWrapWriter is a Writer that supports a limit of characters on every line
+// and does auto word wrapping that respects that limit.
+func NewWordWrapWriter(w io.Writer, limit uint) io.Writer {
+	return &wordWrapWriter{
+		limit:  limit,
+		writer: w,
+	}
+}
+
+func (w wordWrapWriter) Write(p []byte) (nn int, err error) {
+	if w.limit == 0 {
+		return w.writer.Write(p)
+	}
+	original := string(p)
+	wrapped := wordwrap.WrapString(original, w.limit)
+	return w.writer.Write([]byte(wrapped))
+}
+
+// NewPunchCardWriter is a NewWordWrapWriter that limits the line width to 80 columns.
+func NewPunchCardWriter(w io.Writer) io.Writer {
+	return NewWordWrapWriter(w, 80)
+}
+
+type maxWidthWriter struct {
+	maxWidth     uint
+	currentWidth uint
+	written      uint
+	writer       io.Writer
+}
+
+// NewMaxWidthWriter is a Writer that supports a limit of characters on every
+// line, but doesn't do any word wrapping automatically.
+func NewMaxWidthWriter(w io.Writer, maxWidth uint) io.Writer {
+	return &maxWidthWriter{
+		maxWidth: maxWidth,
+		writer:   w,
+	}
+}
+
+func (m maxWidthWriter) Write(p []byte) (nn int, err error) {
+	for _, b := range p {
+		if m.currentWidth == m.maxWidth {
+			m.writer.Write([]byte{'\n'})
+			m.currentWidth = 0
+		}
+		if b == '\n' {
+			m.currentWidth = 0
+		}
+		_, err := m.writer.Write([]byte{b})
+		if err != nil {
+			return int(m.written), err
+		}
+		m.written++
+		m.currentWidth++
+	}
+	return len(p), nil
+}