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main.go
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main.go
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package main
import (
"bufio"
"fmt"
"io"
"os"
"os/exec"
"strings"
"sync"
)
func main() {
args := []string{}
var f *os.File
if len(os.Args) > 1 && os.Args[1] == "-f" {
var err error
f, err = os.OpenFile("tests.out", os.O_TRUNC|os.O_CREATE|os.O_RDWR, 0644)
if err != nil {
fmt.Fprintf(os.Stderr, "Error opening file tests.out: %v", err)
os.Exit(1)
}
defer f.Close()
args = append([]string{"test"}, os.Args[2:]...)
} else {
args = append([]string{"test"}, os.Args[1:]...)
}
cmd := exec.Command("go", args...)
out, err := cmd.StdoutPipe()
if err != nil {
fmt.Fprintf(os.Stderr, "Error getting StdoutPipe from command: %v", err)
os.Exit(1)
}
stderr, err := cmd.StderrPipe()
if err != nil {
fmt.Fprintf(os.Stderr, "Error getting StderrPipe from command: %v", err)
os.Exit(1)
}
if err := cmd.Start(); err != nil {
fmt.Fprintf(os.Stderr, "Error running command: %v", err)
os.Exit(1)
}
wg := &sync.WaitGroup{}
wg.Add(2)
go printOut(f, out, wg)
go printErr(f, stderr, wg)
wg.Wait()
}
func printOut(f *os.File, r io.Reader, wg *sync.WaitGroup) {
scanner := bufio.NewScanner(r)
for scanner.Scan() {
s := string(scanner.Bytes())
if f != nil {
fmt.Fprintln(f, s)
}
if !strings.HasPrefix(s, "[LOG]") {
fmt.Println(s)
}
}
if scanner.Err() != nil {
fmt.Fprintf(os.Stderr, "Error reading output of go test: %v", scanner.Err())
os.Exit(1)
}
wg.Done()
}
func printErr(f *os.File, r io.Reader, wg *sync.WaitGroup) {
scanner := bufio.NewScanner(r)
for scanner.Scan() {
s := string(scanner.Bytes())
if f != nil {
fmt.Fprintln(f, s)
}
fmt.Fprintln(os.Stderr, s)
}
if scanner.Err() != nil {
fmt.Fprintf(os.Stderr, "Error reading output of go test: %v", scanner.Err())
os.Exit(1)
}
wg.Done()
}