mirror of
https://gitea.com/Lydanne/buildx.git
synced 2025-07-09 21:17:09 +08:00
Add --invoke option to launch a container from the build result
Signed-off-by: Kohei Tokunaga <ktokunaga.mail@gmail.com>
This commit is contained in:
Kohei Tokunaga
486
monitor/monitor.go
Normal file
486
monitor/monitor.go
Normal file
@ -0,0 +1,486 @@
|
||||
package monitor
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"context"
|
||||
"fmt"
|
||||
"io"
|
||||
"sync"
|
||||
|
||||
"github.com/docker/buildx/build"
|
||||
"github.com/pkg/errors"
|
||||
"github.com/sirupsen/logrus"
|
||||
"golang.org/x/term"
|
||||
)
|
||||
|
||||
// RunMonitor provides an interactive session for running and managing containers via specified IO.
|
||||
func RunMonitor(ctx context.Context, containerConfig build.ContainerConfig, reloadFunc func(context.Context) (*build.ResultContext, error), stdin io.ReadCloser, stdout, stderr io.WriteCloser) error {
|
||||
monitorIn, monitorOut := ioSetPipe()
|
||||
defer monitorIn.Close()
|
||||
monitorEnableCh := make(chan struct{})
|
||||
monitorDisableCh := make(chan struct{})
|
||||
monitorOutCtx := ioSetOutContext{monitorOut,
|
||||
func() { monitorEnableCh <- struct{}{} },
|
||||
func() { monitorDisableCh <- struct{}{} },
|
||||
}
|
||||
|
||||
containerIn, containerOut := ioSetPipe()
|
||||
defer containerIn.Close()
|
||||
containerOutCtx := ioSetOutContext{containerOut,
|
||||
// send newline to hopefully get the prompt; TODO: better UI (e.g. reprinting the last line)
|
||||
func() { containerOut.stdin.Write([]byte("\n")) },
|
||||
func() {},
|
||||
}
|
||||
|
||||
m := &monitor{
|
||||
invokeIO: newIOForwarder(containerIn),
|
||||
muxIO: newMuxIO(ioSetIn{stdin, stdout, stderr}, []ioSetOutContext{monitorOutCtx, containerOutCtx}, 1, "Switched IO\n"),
|
||||
}
|
||||
|
||||
// Start container automatically
|
||||
go func() {
|
||||
m.rollback(ctx, containerConfig)
|
||||
}()
|
||||
|
||||
// Serve monitor commands
|
||||
monitorForwarder := newIOForwarder(monitorIn)
|
||||
for {
|
||||
<-monitorEnableCh
|
||||
in, out := ioSetPipe()
|
||||
monitorForwarder.setDestination(&out)
|
||||
doneCh, errCh := make(chan struct{}), make(chan error)
|
||||
go func() {
|
||||
defer close(doneCh)
|
||||
defer in.Close()
|
||||
t := term.NewTerminal(readWriter{in.stdin, in.stdout}, "(buildx) ")
|
||||
for {
|
||||
l, err := t.ReadLine()
|
||||
if err != nil {
|
||||
if err != io.EOF {
|
||||
errCh <- err
|
||||
return
|
||||
}
|
||||
return
|
||||
}
|
||||
switch l {
|
||||
case "":
|
||||
// nop
|
||||
case "reload":
|
||||
res, err := reloadFunc(ctx)
|
||||
if err != nil {
|
||||
fmt.Printf("failed to reload: %v\n", err)
|
||||
} else {
|
||||
// rollback the running container with the new result
|
||||
containerConfig.ResultCtx = res
|
||||
m.rollback(ctx, containerConfig)
|
||||
}
|
||||
case "rollback":
|
||||
m.rollback(ctx, containerConfig)
|
||||
case "exit":
|
||||
return
|
||||
default:
|
||||
fmt.Printf("unknown command: %q\n", l)
|
||||
}
|
||||
}
|
||||
}()
|
||||
select {
|
||||
case <-doneCh:
|
||||
return nil
|
||||
case err := <-errCh:
|
||||
return err
|
||||
case <-monitorDisableCh:
|
||||
}
|
||||
monitorForwarder.setDestination(nil)
|
||||
}
|
||||
}
|
||||
|
||||
type readWriter struct {
|
||||
io.Reader
|
||||
io.Writer
|
||||
}
|
||||
|
||||
type monitor struct {
|
||||
muxIO *muxIO
|
||||
invokeIO *ioForwarder
|
||||
curInvokeCancel func()
|
||||
}
|
||||
|
||||
func (m *monitor) rollback(ctx context.Context, cfg build.ContainerConfig) {
|
||||
if m.curInvokeCancel != nil {
|
||||
m.curInvokeCancel() // Finish the running container if exists
|
||||
}
|
||||
go func() {
|
||||
// Start a new container
|
||||
if err := m.invoke(ctx, cfg); err != nil {
|
||||
logrus.Debugf("invoke error: %v", err)
|
||||
}
|
||||
}()
|
||||
}
|
||||
|
||||
func (m *monitor) invoke(ctx context.Context, cfg build.ContainerConfig) error {
|
||||
m.muxIO.enable(1)
|
||||
defer m.muxIO.disable(1)
|
||||
invokeCtx, invokeCancel := context.WithCancel(ctx)
|
||||
|
||||
containerIn, containerOut := ioSetPipe()
|
||||
m.invokeIO.setDestination(&containerOut)
|
||||
waitInvokeDoneCh := make(chan struct{})
|
||||
var cancelOnce sync.Once
|
||||
curInvokeCancel := func() {
|
||||
cancelOnce.Do(func() {
|
||||
containerIn.Close()
|
||||
m.invokeIO.setDestination(nil)
|
||||
invokeCancel()
|
||||
})
|
||||
<-waitInvokeDoneCh
|
||||
}
|
||||
defer curInvokeCancel()
|
||||
m.curInvokeCancel = curInvokeCancel
|
||||
|
||||
cfg.Stdin = containerIn.stdin
|
||||
cfg.Stdout = containerIn.stdout
|
||||
cfg.Stderr = containerIn.stderr
|
||||
err := build.Invoke(invokeCtx, cfg)
|
||||
close(waitInvokeDoneCh)
|
||||
|
||||
return err
|
||||
}
|
||||
|
||||
type ioForwarder struct {
|
||||
curIO *ioSetOut
|
||||
mu sync.Mutex
|
||||
updateCh chan struct{}
|
||||
}
|
||||
|
||||
func newIOForwarder(in ioSetIn) *ioForwarder {
|
||||
f := &ioForwarder{
|
||||
updateCh: make(chan struct{}),
|
||||
}
|
||||
doneCh := make(chan struct{})
|
||||
go func() {
|
||||
for {
|
||||
f.mu.Lock()
|
||||
w := f.curIO
|
||||
f.mu.Unlock()
|
||||
if w != nil && w.stdout != nil && w.stderr != nil {
|
||||
go func() {
|
||||
if _, err := io.Copy(in.stdout, w.stdout); err != nil && err != io.ErrClosedPipe {
|
||||
// ErrClosedPipe is OK as we close this read end during setDestination.
|
||||
logrus.WithError(err).Warnf("failed to forward stdout: %v", err)
|
||||
}
|
||||
}()
|
||||
go func() {
|
||||
if _, err := io.Copy(in.stderr, w.stderr); err != nil && err != io.ErrClosedPipe {
|
||||
// ErrClosedPipe is OK as we close this read end during setDestination.
|
||||
logrus.WithError(err).Warnf("failed to forward stderr: %v", err)
|
||||
}
|
||||
}()
|
||||
}
|
||||
select {
|
||||
case <-f.updateCh:
|
||||
case <-doneCh:
|
||||
return
|
||||
}
|
||||
}
|
||||
}()
|
||||
go func() {
|
||||
if err := copyToFunc(in.stdin, func() (io.Writer, error) {
|
||||
f.mu.Lock()
|
||||
w := f.curIO
|
||||
f.mu.Unlock()
|
||||
if w != nil {
|
||||
return w.stdin, nil
|
||||
}
|
||||
return nil, nil
|
||||
}); err != nil && err != io.ErrClosedPipe {
|
||||
logrus.WithError(err).Warnf("failed to forward IO: %v", err)
|
||||
}
|
||||
close(doneCh)
|
||||
|
||||
if w := f.curIO; w != nil {
|
||||
// Propagate close
|
||||
if err := w.Close(); err != nil {
|
||||
logrus.WithError(err).Warnf("failed to forwarded stdin IO: %v", err)
|
||||
}
|
||||
}
|
||||
}()
|
||||
return f
|
||||
}
|
||||
|
||||
func (f *ioForwarder) setDestination(out *ioSetOut) {
|
||||
f.mu.Lock()
|
||||
if f.curIO != nil {
|
||||
// close all stream on the current IO no to mix with the new IO
|
||||
f.curIO.Close()
|
||||
}
|
||||
f.curIO = out
|
||||
f.mu.Unlock()
|
||||
f.updateCh <- struct{}{}
|
||||
}
|
||||
|
||||
type ioSetOutContext struct {
|
||||
ioSetOut
|
||||
enableHook func()
|
||||
disableHook func()
|
||||
}
|
||||
|
||||
// newMuxIO forwards IO stream to/from "in" and "outs".
|
||||
// "outs" are closed automatically when "in" reaches EOF.
|
||||
// "in" doesn't closed automatically so the caller needs to explicitly close it.
|
||||
func newMuxIO(in ioSetIn, out []ioSetOutContext, initIdx int, toggleMessage string) *muxIO {
|
||||
m := &muxIO{
|
||||
enabled: make(map[int]struct{}),
|
||||
in: in,
|
||||
out: out,
|
||||
closedCh: make(chan struct{}),
|
||||
toggleMessage: toggleMessage,
|
||||
}
|
||||
for i := range out {
|
||||
m.enabled[i] = struct{}{}
|
||||
}
|
||||
m.maxCur = len(out)
|
||||
m.cur = initIdx
|
||||
var wg sync.WaitGroup
|
||||
var mu sync.Mutex
|
||||
for i, o := range out {
|
||||
i, o := i, o
|
||||
wg.Add(1)
|
||||
go func() {
|
||||
defer wg.Done()
|
||||
if err := copyToFunc(o.stdout, func() (io.Writer, error) {
|
||||
if m.cur == i {
|
||||
return in.stdout, nil
|
||||
}
|
||||
return nil, nil
|
||||
}); err != nil {
|
||||
logrus.WithField("output index", i).WithError(err).Warnf("failed to write stdout")
|
||||
}
|
||||
if err := o.stdout.Close(); err != nil {
|
||||
logrus.WithField("output index", i).WithError(err).Warnf("failed to close stdout")
|
||||
}
|
||||
}()
|
||||
wg.Add(1)
|
||||
go func() {
|
||||
defer wg.Done()
|
||||
if err := copyToFunc(o.stderr, func() (io.Writer, error) {
|
||||
if m.cur == i {
|
||||
return in.stderr, nil
|
||||
}
|
||||
return nil, nil
|
||||
}); err != nil {
|
||||
logrus.WithField("output index", i).WithError(err).Warnf("failed to write stderr")
|
||||
}
|
||||
if err := o.stderr.Close(); err != nil {
|
||||
logrus.WithField("output index", i).WithError(err).Warnf("failed to close stderr")
|
||||
}
|
||||
}()
|
||||
}
|
||||
go func() {
|
||||
errToggle := errors.Errorf("toggle IO")
|
||||
for {
|
||||
prevIsControlSequence := false
|
||||
if err := copyToFunc(traceReader(in.stdin, func(r rune) (bool, error) {
|
||||
// Toggle IO when it detects C-a-c
|
||||
// TODO: make it configurable if needed
|
||||
if int(r) == 1 {
|
||||
prevIsControlSequence = true
|
||||
return false, nil
|
||||
}
|
||||
defer func() { prevIsControlSequence = false }()
|
||||
if prevIsControlSequence {
|
||||
if string(r) == "c" {
|
||||
return false, errToggle
|
||||
}
|
||||
}
|
||||
return true, nil
|
||||
}), func() (io.Writer, error) {
|
||||
mu.Lock()
|
||||
o := out[m.cur]
|
||||
mu.Unlock()
|
||||
return o.stdin, nil
|
||||
}); !errors.Is(err, errToggle) {
|
||||
if err != nil {
|
||||
logrus.WithError(err).Warnf("failed to read stdin")
|
||||
}
|
||||
break
|
||||
}
|
||||
m.toggleIO()
|
||||
}
|
||||
|
||||
// propagate stdin EOF
|
||||
for i, o := range out {
|
||||
if err := o.stdin.Close(); err != nil {
|
||||
logrus.WithError(err).Warnf("failed to close stdin of %d", i)
|
||||
}
|
||||
}
|
||||
wg.Wait()
|
||||
close(m.closedCh)
|
||||
}()
|
||||
return m
|
||||
}
|
||||
|
||||
type muxIO struct {
|
||||
cur int
|
||||
maxCur int
|
||||
enabled map[int]struct{}
|
||||
mu sync.Mutex
|
||||
in ioSetIn
|
||||
out []ioSetOutContext
|
||||
closedCh chan struct{}
|
||||
toggleMessage string
|
||||
}
|
||||
|
||||
func (m *muxIO) waitClosed() {
|
||||
<-m.closedCh
|
||||
}
|
||||
|
||||
func (m *muxIO) enable(i int) {
|
||||
m.mu.Lock()
|
||||
defer m.mu.Unlock()
|
||||
m.enabled[i] = struct{}{}
|
||||
}
|
||||
|
||||
func (m *muxIO) disable(i int) error {
|
||||
m.mu.Lock()
|
||||
defer m.mu.Unlock()
|
||||
if i == 0 {
|
||||
return errors.Errorf("disabling 0th io is prohibited")
|
||||
}
|
||||
delete(m.enabled, i)
|
||||
if m.cur == i {
|
||||
m.toggleIO()
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (m *muxIO) toggleIO() {
|
||||
if m.out[m.cur].disableHook != nil {
|
||||
m.out[m.cur].disableHook()
|
||||
}
|
||||
for {
|
||||
if m.cur+1 >= m.maxCur {
|
||||
m.cur = 0
|
||||
} else {
|
||||
m.cur++
|
||||
}
|
||||
if _, ok := m.enabled[m.cur]; !ok {
|
||||
continue
|
||||
}
|
||||
break
|
||||
}
|
||||
if m.out[m.cur].enableHook != nil {
|
||||
m.out[m.cur].enableHook()
|
||||
}
|
||||
fmt.Fprintf(m.in.stdout, m.toggleMessage)
|
||||
}
|
||||
|
||||
func traceReader(r io.ReadCloser, f func(rune) (bool, error)) io.ReadCloser {
|
||||
pr, pw := io.Pipe()
|
||||
go func() {
|
||||
br := bufio.NewReader(r)
|
||||
for {
|
||||
rn, _, err := br.ReadRune()
|
||||
if err != nil {
|
||||
if err == io.EOF {
|
||||
pw.Close()
|
||||
return
|
||||
}
|
||||
pw.CloseWithError(err)
|
||||
return
|
||||
}
|
||||
if isWrite, err := f(rn); err != nil {
|
||||
pw.CloseWithError(err)
|
||||
return
|
||||
} else if !isWrite {
|
||||
continue
|
||||
}
|
||||
if _, err := pw.Write([]byte(string(rn))); err != nil {
|
||||
pw.CloseWithError(err)
|
||||
return
|
||||
}
|
||||
}
|
||||
}()
|
||||
return &readerWithClose{
|
||||
Reader: pr,
|
||||
closeFunc: func() error {
|
||||
pr.Close()
|
||||
return r.Close()
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
func copyToFunc(r io.Reader, wFunc func() (io.Writer, error)) error {
|
||||
buf := make([]byte, 4096)
|
||||
for {
|
||||
n, readErr := r.Read(buf)
|
||||
if readErr != nil && readErr != io.EOF {
|
||||
return readErr
|
||||
}
|
||||
w, err := wFunc()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if w != nil {
|
||||
if _, err := w.Write(buf[:n]); err != nil {
|
||||
logrus.WithError(err).Debugf("failed to copy")
|
||||
}
|
||||
}
|
||||
if readErr == io.EOF {
|
||||
return nil
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func ioSetPipe() (ioSetIn, ioSetOut) {
|
||||
r1, w1 := io.Pipe()
|
||||
r2, w2 := io.Pipe()
|
||||
r3, w3 := io.Pipe()
|
||||
return ioSetIn{r1, w2, w3}, ioSetOut{w1, r2, r3}
|
||||
}
|
||||
|
||||
type ioSetIn struct {
|
||||
stdin io.ReadCloser
|
||||
stdout io.WriteCloser
|
||||
stderr io.WriteCloser
|
||||
}
|
||||
|
||||
func (s ioSetIn) Close() (retErr error) {
|
||||
if err := s.stdin.Close(); err != nil {
|
||||
retErr = err
|
||||
}
|
||||
if err := s.stdout.Close(); err != nil {
|
||||
retErr = err
|
||||
}
|
||||
if err := s.stderr.Close(); err != nil {
|
||||
retErr = err
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
type ioSetOut struct {
|
||||
stdin io.WriteCloser
|
||||
stdout io.ReadCloser
|
||||
stderr io.ReadCloser
|
||||
}
|
||||
|
||||
func (s ioSetOut) Close() (retErr error) {
|
||||
if err := s.stdin.Close(); err != nil {
|
||||
retErr = err
|
||||
}
|
||||
if err := s.stdout.Close(); err != nil {
|
||||
retErr = err
|
||||
}
|
||||
if err := s.stderr.Close(); err != nil {
|
||||
retErr = err
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
type readerWithClose struct {
|
||||
io.Reader
|
||||
closeFunc func() error
|
||||
}
|
||||
|
||||
func (r *readerWithClose) Close() error {
|
||||
return r.closeFunc()
|
||||
}
|
||||
321
monitor/monitor_test.go
Normal file
321
monitor/monitor_test.go
Normal file
@ -0,0 +1,321 @@
|
||||
package monitor
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"fmt"
|
||||
"io"
|
||||
"regexp"
|
||||
"strings"
|
||||
"testing"
|
||||
|
||||
"golang.org/x/sync/errgroup"
|
||||
)
|
||||
|
||||
// TestMuxIO tests muxIO
|
||||
func TestMuxIO(t *testing.T) {
|
||||
tests := []struct {
|
||||
name string
|
||||
inputs []instruction
|
||||
initIdx int
|
||||
outputsNum int
|
||||
wants []string
|
||||
|
||||
// Everytime string is written to the mux stdin, the output end
|
||||
// that received the string write backs to the string that is masked with
|
||||
// its index number. This is useful to check if writeback is written from the
|
||||
// expected output destination.
|
||||
wantsMaskedOutput string
|
||||
}{
|
||||
{
|
||||
name: "single output",
|
||||
inputs: []instruction{
|
||||
input("foo\nbar\n"),
|
||||
toggle(),
|
||||
input("1234"),
|
||||
toggle(),
|
||||
input("456"),
|
||||
},
|
||||
initIdx: 0,
|
||||
outputsNum: 1,
|
||||
wants: []string{"foo\nbar\n1234456"},
|
||||
wantsMaskedOutput: `^0+$`,
|
||||
},
|
||||
{
|
||||
name: "multi output",
|
||||
inputs: []instruction{
|
||||
input("foo\nbar\n"),
|
||||
toggle(),
|
||||
input("12" + string([]rune{rune(1)}) + "34abc"),
|
||||
toggle(),
|
||||
input("456"),
|
||||
},
|
||||
initIdx: 0,
|
||||
outputsNum: 3,
|
||||
wants: []string{"foo\nbar\n", "1234abc", "456"},
|
||||
wantsMaskedOutput: `^0+1+2+$`,
|
||||
},
|
||||
{
|
||||
name: "multi output with nonzero index",
|
||||
inputs: []instruction{
|
||||
input("foo\nbar\n"),
|
||||
toggle(),
|
||||
input("1234"),
|
||||
toggle(),
|
||||
input("456"),
|
||||
},
|
||||
initIdx: 1,
|
||||
outputsNum: 3,
|
||||
wants: []string{"456", "foo\nbar\n", "1234"},
|
||||
wantsMaskedOutput: `^1+2+0+$`,
|
||||
},
|
||||
{
|
||||
name: "multi output many toggles",
|
||||
inputs: []instruction{
|
||||
input("foo\nbar\n"),
|
||||
toggle(),
|
||||
input("1234"),
|
||||
toggle(),
|
||||
toggle(),
|
||||
input("456"),
|
||||
toggle(),
|
||||
input("%%%%"),
|
||||
toggle(),
|
||||
toggle(),
|
||||
toggle(),
|
||||
input("aaaa"),
|
||||
},
|
||||
initIdx: 0,
|
||||
outputsNum: 3,
|
||||
wants: []string{"foo\nbar\n456", "1234%%%%aaaa", ""},
|
||||
wantsMaskedOutput: `^0+1+0+1+$`,
|
||||
},
|
||||
{
|
||||
name: "enable disable",
|
||||
inputs: []instruction{
|
||||
input("foo\nbar\n"),
|
||||
toggle(),
|
||||
input("1234"),
|
||||
toggle(),
|
||||
input("456"),
|
||||
disable(2),
|
||||
input("%%%%"),
|
||||
enable(2),
|
||||
toggle(),
|
||||
toggle(),
|
||||
input("aaa"),
|
||||
disable(2),
|
||||
disable(1),
|
||||
input("1111"),
|
||||
toggle(),
|
||||
input("2222"),
|
||||
toggle(),
|
||||
input("3333"),
|
||||
},
|
||||
initIdx: 0,
|
||||
outputsNum: 3,
|
||||
wants: []string{"foo\nbar\n%%%%111122223333", "1234", "456aaa"},
|
||||
wantsMaskedOutput: `^0+1+2+0+2+0+$`,
|
||||
},
|
||||
}
|
||||
|
||||
for _, tt := range tests {
|
||||
t.Run(tt.name, func(t *testing.T) {
|
||||
inBuf, end, in := newTestIn(t)
|
||||
var outBufs []*outBuf
|
||||
var outs []ioSetOutContext
|
||||
if tt.outputsNum != len(tt.wants) {
|
||||
t.Fatalf("wants != outputsNum")
|
||||
}
|
||||
for i := 0; i < tt.outputsNum; i++ {
|
||||
outBuf, out := newTestOut(t, i)
|
||||
outBufs = append(outBufs, outBuf)
|
||||
outs = append(outs, ioSetOutContext{out, nil, nil})
|
||||
}
|
||||
mio := newMuxIO(in, outs, tt.initIdx, "")
|
||||
for _, i := range tt.inputs {
|
||||
// Add input to muxIO
|
||||
istr, writeback := i(mio)
|
||||
if _, err := end.stdin.Write([]byte(istr)); err != nil {
|
||||
t.Fatalf("failed to write data to stdin: %v", err)
|
||||
}
|
||||
|
||||
// Wait for writeback of this input
|
||||
var eg errgroup.Group
|
||||
eg.Go(func() error {
|
||||
outbuf := make([]byte, len(writeback))
|
||||
if _, err := io.ReadAtLeast(end.stdout, outbuf, len(outbuf)); err != nil {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
})
|
||||
eg.Go(func() error {
|
||||
errbuf := make([]byte, len(writeback))
|
||||
if _, err := io.ReadAtLeast(end.stderr, errbuf, len(errbuf)); err != nil {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
})
|
||||
if err := eg.Wait(); err != nil {
|
||||
t.Fatalf("failed to wait for output: %v", err)
|
||||
}
|
||||
}
|
||||
|
||||
// Close stdin on this muxIO
|
||||
end.stdin.Close()
|
||||
|
||||
// Wait for all output ends reach EOF
|
||||
mio.waitClosed()
|
||||
|
||||
// Close stdout/stderr as well
|
||||
in.Close()
|
||||
|
||||
// Check if each output end received expected string
|
||||
<-inBuf.doneCh
|
||||
for i, o := range outBufs {
|
||||
<-o.doneCh
|
||||
if o.stdin != tt.wants[i] {
|
||||
t.Fatalf("output[%d]: got %q; wanted %q", i, o.stdin, tt.wants[i])
|
||||
}
|
||||
}
|
||||
|
||||
// Check if expected string is returned from expected outputs
|
||||
if !regexp.MustCompile(tt.wantsMaskedOutput).MatchString(inBuf.stdout) {
|
||||
t.Fatalf("stdout: got %q; wanted %q", inBuf.stdout, tt.wantsMaskedOutput)
|
||||
}
|
||||
if !regexp.MustCompile(tt.wantsMaskedOutput).MatchString(inBuf.stderr) {
|
||||
t.Fatalf("stderr: got %q; wanted %q", inBuf.stderr, tt.wantsMaskedOutput)
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
type instruction func(m *muxIO) (intput string, writeBackView string)
|
||||
|
||||
func input(s string) instruction {
|
||||
return func(m *muxIO) (string, string) {
|
||||
return s, strings.ReplaceAll(s, string([]rune{rune(1)}), "")
|
||||
}
|
||||
}
|
||||
|
||||
func toggle() instruction {
|
||||
return func(m *muxIO) (string, string) {
|
||||
return string([]rune{rune(1)}) + "c", ""
|
||||
}
|
||||
}
|
||||
|
||||
func enable(i int) instruction {
|
||||
return func(m *muxIO) (string, string) {
|
||||
m.enable(i)
|
||||
return "", ""
|
||||
}
|
||||
}
|
||||
|
||||
func disable(i int) instruction {
|
||||
return func(m *muxIO) (string, string) {
|
||||
m.disable(i)
|
||||
return "", ""
|
||||
}
|
||||
}
|
||||
|
||||
type inBuf struct {
|
||||
stdout string
|
||||
stderr string
|
||||
doneCh chan struct{}
|
||||
}
|
||||
|
||||
func newTestIn(t *testing.T) (*inBuf, ioSetOut, ioSetIn) {
|
||||
ti := &inBuf{
|
||||
doneCh: make(chan struct{}),
|
||||
}
|
||||
gotOutR, gotOutW := io.Pipe()
|
||||
gotErrR, gotErrW := io.Pipe()
|
||||
outR, outW := io.Pipe()
|
||||
var eg errgroup.Group
|
||||
eg.Go(func() error {
|
||||
buf := new(bytes.Buffer)
|
||||
if _, err := io.Copy(io.MultiWriter(gotOutW, buf), outR); err != nil {
|
||||
return err
|
||||
}
|
||||
ti.stdout = buf.String()
|
||||
return nil
|
||||
})
|
||||
errR, errW := io.Pipe()
|
||||
eg.Go(func() error {
|
||||
buf := new(bytes.Buffer)
|
||||
if _, err := io.Copy(io.MultiWriter(gotErrW, buf), errR); err != nil {
|
||||
return err
|
||||
}
|
||||
ti.stderr = buf.String()
|
||||
return nil
|
||||
})
|
||||
go func() {
|
||||
eg.Wait()
|
||||
close(ti.doneCh)
|
||||
}()
|
||||
inR, inW := io.Pipe()
|
||||
return ti, ioSetOut{inW, gotOutR, gotErrR}, ioSetIn{inR, outW, errW}
|
||||
}
|
||||
|
||||
type outBuf struct {
|
||||
idx int
|
||||
stdin string
|
||||
doneCh chan struct{}
|
||||
}
|
||||
|
||||
func newTestOut(t *testing.T, idx int) (*outBuf, ioSetOut) {
|
||||
to := &outBuf{
|
||||
idx: idx,
|
||||
doneCh: make(chan struct{}),
|
||||
}
|
||||
inR, inW := io.Pipe()
|
||||
outR, outW := io.Pipe()
|
||||
errR, errW := io.Pipe()
|
||||
go func() {
|
||||
defer inR.Close()
|
||||
defer outW.Close()
|
||||
defer errW.Close()
|
||||
buf := new(bytes.Buffer)
|
||||
mw := io.MultiWriter(buf,
|
||||
writeMasked(outW, fmt.Sprintf("%d", to.idx)),
|
||||
writeMasked(errW, fmt.Sprintf("%d", to.idx)),
|
||||
)
|
||||
if _, err := io.Copy(mw, inR); err != nil {
|
||||
inR.CloseWithError(err)
|
||||
outW.CloseWithError(err)
|
||||
errW.CloseWithError(err)
|
||||
return
|
||||
}
|
||||
to.stdin = string(buf.Bytes())
|
||||
outW.Close()
|
||||
errW.Close()
|
||||
close(to.doneCh)
|
||||
}()
|
||||
return to, ioSetOut{inW, outR, errR}
|
||||
}
|
||||
|
||||
func writeMasked(w io.Writer, s string) io.Writer {
|
||||
buf := make([]byte, 4096)
|
||||
pr, pw := io.Pipe()
|
||||
go func() {
|
||||
for {
|
||||
n, readErr := pr.Read(buf)
|
||||
if readErr != nil && readErr != io.EOF {
|
||||
pr.CloseWithError(readErr)
|
||||
return
|
||||
}
|
||||
var masked string
|
||||
for i := 0; i < n; i++ {
|
||||
masked += s
|
||||
}
|
||||
if _, err := w.Write([]byte(masked)); err != nil {
|
||||
pr.CloseWithError(err)
|
||||
return
|
||||
}
|
||||
if readErr == io.EOF {
|
||||
pr.Close()
|
||||
return
|
||||
}
|
||||
}
|
||||
}()
|
||||
return pw
|
||||
}
|
||||
Reference in New Issue
Block a user