1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
package integrationtests
import (
"bufio"
"context"
"fmt"
"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, 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...)
cmdStdout, err := cmd.StdoutPipe()
if err != nil {
return stdoutCh, stderrCh, nil, err
}
cmdStderr, err := cmd.StderrPipe()
err = cmd.Start()
if err != nil {
return stdoutCh, stderrCh, nil, err
}
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.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))
}
|
