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moby--moby/integration-cli/utils.go

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package main
import (
"bytes"
"encoding/json"
"fmt"
"io"
"net/http"
"net/http/httptest"
"os"
"os/exec"
"reflect"
"strings"
"syscall"
"testing"
"time"
"github.com/docker/docker/vendor/src/code.google.com/p/go/src/pkg/archive/tar"
)
func getExitCode(err error) (int, error) {
exitCode := 0
if exiterr, ok := err.(*exec.ExitError); ok {
if procExit := exiterr.Sys().(syscall.WaitStatus); ok {
return procExit.ExitStatus(), nil
}
}
return exitCode, fmt.Errorf("failed to get exit code")
}
func runCommandWithOutput(cmd *exec.Cmd) (output string, exitCode int, err error) {
exitCode = 0
out, err := cmd.CombinedOutput()
if err != nil {
var exiterr error
if exitCode, exiterr = getExitCode(err); exiterr != nil {
// TODO: Fix this so we check the error's text.
// we've failed to retrieve exit code, so we set it to 127
exitCode = 127
}
}
output = string(out)
return
}
func runCommandWithStdoutStderr(cmd *exec.Cmd) (stdout string, stderr string, exitCode int, err error) {
exitCode = 0
var stderrBuffer bytes.Buffer
stderrPipe, err := cmd.StderrPipe()
if err != nil {
return "", "", -1, err
}
go io.Copy(&stderrBuffer, stderrPipe)
out, err := cmd.Output()
if err != nil {
var exiterr error
if exitCode, exiterr = getExitCode(err); exiterr != nil {
// TODO: Fix this so we check the error's text.
// we've failed to retrieve exit code, so we set it to 127
exitCode = 127
}
}
stdout = string(out)
stderr = string(stderrBuffer.Bytes())
return
}
func runCommand(cmd *exec.Cmd) (exitCode int, err error) {
exitCode = 0
err = cmd.Run()
if err != nil {
var exiterr error
if exitCode, exiterr = getExitCode(err); exiterr != nil {
// TODO: Fix this so we check the error's text.
// we've failed to retrieve exit code, so we set it to 127
exitCode = 127
}
}
return
}
func startCommand(cmd *exec.Cmd) (exitCode int, err error) {
exitCode = 0
err = cmd.Start()
if err != nil {
var exiterr error
if exitCode, exiterr = getExitCode(err); exiterr != nil {
// TODO: Fix this so we check the error's text.
// we've failed to retrieve exit code, so we set it to 127
exitCode = 127
}
}
return
}
func logDone(message string) {
fmt.Printf("[PASSED]: %s\n", message)
}
func stripTrailingCharacters(target string) string {
target = strings.Trim(target, "\n")
target = strings.Trim(target, " ")
return target
}
func errorOut(err error, t *testing.T, message string) {
if err != nil {
t.Fatal(message)
}
}
func errorOutOnNonNilError(err error, t *testing.T, message string) {
if err == nil {
t.Fatalf(message)
}
}
func nLines(s string) int {
return strings.Count(s, "\n")
}
func unmarshalJSON(data []byte, result interface{}) error {
err := json.Unmarshal(data, result)
if err != nil {
return err
}
return nil
}
func deepEqual(expected interface{}, result interface{}) bool {
return reflect.DeepEqual(result, expected)
}
func convertSliceOfStringsToMap(input []string) map[string]struct{} {
output := make(map[string]struct{})
for _, v := range input {
output[v] = struct{}{}
}
return output
}
func waitForContainer(contId string, args ...string) error {
args = append([]string{"run", "--name", contId}, args...)
cmd := exec.Command(dockerBinary, args...)
if _, err := runCommand(cmd); err != nil {
return err
}
if err := waitRun(contId); err != nil {
return err
}
return nil
}
func waitRun(contId string) error {
after := time.After(5 * time.Second)
for {
cmd := exec.Command(dockerBinary, "inspect", "-f", "{{.State.Running}}", contId)
out, _, err := runCommandWithOutput(cmd)
if err != nil {
return fmt.Errorf("error executing docker inspect: %v", err)
}
if strings.Contains(out, "true") {
break
}
select {
case <-after:
return fmt.Errorf("container did not come up in time")
default:
}
time.Sleep(100 * time.Millisecond)
}
return nil
}
func compareDirectoryEntries(e1 []os.FileInfo, e2 []os.FileInfo) error {
var (
e1Entries = make(map[string]struct{})
e2Entries = make(map[string]struct{})
)
for _, e := range e1 {
e1Entries[e.Name()] = struct{}{}
}
for _, e := range e2 {
e2Entries[e.Name()] = struct{}{}
}
if !reflect.DeepEqual(e1Entries, e2Entries) {
return fmt.Errorf("entries differ")
}
return nil
}
func ListTar(f io.Reader) ([]string, error) {
tr := tar.NewReader(f)
var entries []string
for {
th, err := tr.Next()
if err == io.EOF {
// end of tar archive
return entries, nil
}
if err != nil {
return entries, err
}
entries = append(entries, th.Name)
}
}
type FileServer struct {
*httptest.Server
}
func fileServer(files map[string]string) (*FileServer, error) {
var handler http.HandlerFunc = func(w http.ResponseWriter, r *http.Request) {
if filePath, found := files[r.URL.Path]; found {
http.ServeFile(w, r, filePath)
} else {
http.Error(w, http.StatusText(404), 404)
}
}
for _, file := range files {
if _, err := os.Stat(file); err != nil {
return nil, err
}
}
server := httptest.NewServer(handler)
return &FileServer{
Server: server,
}, nil
}
func copyWithCP(source, target string) error {
copyCmd := exec.Command("cp", "-rp", source, target)
out, exitCode, err := runCommandWithOutput(copyCmd)
if err != nil || exitCode != 0 {
return fmt.Errorf("failed to copy: error: %q ,output: %q", err, out)
}
return nil
}