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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: %v", 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: %v", 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.Log(fmt.Sprintf("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() {
// Read raw bytes to preserve line endings, but filter out protocol messages
buf := make([]byte, 4096)
var accumulated []byte
for {
n, err := cmdStdout.Read(buf)
if n > 0 {
accumulated = append(accumulated, buf[:n]...)
// Process accumulated data line by line, preserving original line endings
data := accumulated
var processedLines [][]byte
var remaining []byte
// Split on LF while preserving CRLF sequences
start := 0
for i := 0; i < len(data); i++ {
if data[i] == '\n' {
// Found a complete line (including the \n)
line := data[start:i+1]
processedLines = append(processedLines, line)
start = i + 1
}
}
// Keep any remaining partial line
if start < len(data) {
remaining = data[start:]
}
accumulated = remaining
// Send complete lines, filtering out protocol messages
for _, line := range processedLines {
lineStr := string(line)
lineContent := strings.TrimRight(lineStr, "\r\n")
// Filter out protocol messages like ".syn close connection"
if strings.HasPrefix(lineContent, ".syn ") ||
strings.HasPrefix(lineContent, "CLIENT|") ||
strings.HasPrefix(lineContent, "SERVER|") {
continue
}
// Check for protocol messages appended to content (like "content.syn close connection")
if strings.Contains(lineContent, ".syn close connection") {
// Remove the protocol message from the content
cleanContent := strings.Replace(lineContent, ".syn close connection", "", 1)
// Preserve the original line ending
lineEnding := lineStr[len(lineContent):]
stdoutCh <- cleanContent + lineEnding
} else {
stdoutCh <- lineStr
}
}
}
if err != nil {
// Send any remaining data in buffer
if len(accumulated) > 0 {
remaining := string(accumulated)
remainingContent := strings.TrimRight(remaining, "\r\n")
// Filter out protocol messages
if strings.HasPrefix(remainingContent, ".syn ") ||
strings.HasPrefix(remainingContent, "CLIENT|") ||
strings.HasPrefix(remainingContent, "SERVER|") {
// Skip protocol messages
} else if strings.Contains(remainingContent, ".syn close connection") {
// Remove the protocol message from the content
cleanContent := strings.Replace(remainingContent, ".syn close connection", "", 1)
// Preserve the original ending
ending := remaining[len(remainingContent):]
stdoutCh <- cleanContent + ending
} else {
stdoutCh <- remaining
}
}
break
}
}
}()
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.Log(fmt.Sprintf("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.Sprintf("Unable to get process exit code from error: %v", err))
}
|
