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|
package integrationtests
import (
"bufio"
"context"
"fmt"
"io"
"os"
"os/exec"
"strings"
"syscall"
"testing"
"time"
)
func runCommand(ctx context.Context, t *testing.T, stdoutFile, cmdStr string,
args ...string) (int, error) {
if _, err := os.Stat(cmdStr); err != nil {
return 0, fmt.Errorf("no such executable '%s', please compile first: %w", cmdStr, err)
}
t.Log("Creating stdout file", stdoutFile)
fd, err := os.Create(stdoutFile)
if err != nil {
return 0, nil
}
defer fd.Close()
t.Log("Running command", cmdStr, strings.Join(args, " "))
cmd := exec.CommandContext(ctx, cmdStr, args...)
out, err := cmd.CombinedOutput()
t.Log("Done running command!", err)
_, _ = fd.Write(out)
return exitCodeFromError(err), err
}
func runCommandRetry(ctx context.Context, t *testing.T, retries int, stdoutFile,
cmd string, args ...string) (exitCode int, err error) {
for i := 0; i < retries; i++ {
time.Sleep(time.Second)
if exitCode, err = runCommand(ctx, t, stdoutFile, cmd, args...); exitCode == 0 {
return
}
}
return
}
func startCommand(ctx context.Context, t *testing.T, inPipeFile,
cmdStr string, args ...string) (<-chan string, <-chan string, <-chan error, error) {
stdoutCh := make(chan string)
stderrCh := make(chan string)
if _, err := os.Stat(cmdStr); err != nil {
return stdoutCh, stderrCh, nil,
fmt.Errorf("no such executable '%s', please compile first: %w", cmdStr, err)
}
t.Log(cmdStr, strings.Join(args, " "))
cmd := exec.CommandContext(ctx, cmdStr, args...)
var stdinPipe io.WriteCloser
if inPipeFile != "" {
var err error
stdinPipe, err = cmd.StdinPipe()
if err != nil {
return stdoutCh, stderrCh, nil, err
}
}
cmdStdout, err := cmd.StdoutPipe()
if err != nil {
return stdoutCh, stderrCh, nil, err
}
cmdStderr, err := cmd.StderrPipe()
if err != nil {
return stdoutCh, stderrCh, nil, err
}
err = cmd.Start()
if err != nil {
return stdoutCh, stderrCh, nil, err
}
// Read input file and send to stdin pipe?
if inPipeFile != "" {
t.Logf("Piping %s to stdin pipe", inPipeFile)
fd, err := os.Open(inPipeFile)
if err != nil {
return stdoutCh, stderrCh, nil, err
}
go func() {
_, _ = io.Copy(stdinPipe, bufio.NewReader(fd))
stdinPipe.Close()
fd.Close()
}()
}
go func() {
scanner := bufio.NewScanner(cmdStdout)
scanner.Split(bufio.ScanLines)
for scanner.Scan() {
stdoutCh <- scanner.Text()
}
}()
go func() {
scanner := bufio.NewScanner(cmdStderr)
scanner.Split(bufio.ScanLines)
for scanner.Scan() {
stderrCh <- scanner.Text()
}
close(stderrCh)
}()
cmdErrCh := make(chan error)
go func() {
cmdErrCh <- cmd.Wait()
}()
return stdoutCh, stderrCh, cmdErrCh, nil
}
func waitForCommand(ctx context.Context, t *testing.T,
stdoutCh, stderrCh <-chan string, cmdErrCh <-chan error) {
for {
select {
case line, ok := <-stdoutCh:
if ok {
t.Log(line)
}
case line, ok := <-stderrCh:
if ok {
t.Log(line)
}
case cmdErr := <-cmdErrCh:
t.Logf("Command finished with with exit code %d: %v",
exitCodeFromError(cmdErr), cmdErr)
return
}
}
}
func exitCodeFromError(err error) int {
if err == nil {
return 0
}
if exitError, ok := err.(*exec.ExitError); ok {
ws := exitError.Sys().(syscall.WaitStatus)
return ws.ExitStatus()
}
panic(fmt.Errorf("Unable to get process exit code from error: %w", err))
}
|
