refactor: move exec to myexec

hrp/internal/myexec/cmd_uixt.go

@@ -0,0 +1,71 @@
+//go:build darwin || linux
+
+package myexec
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"syscall"
+
+	"github.com/pkg/errors"
+	"github.com/rs/zerolog/log"
+)
+
+func getPython3Executable(venvDir string) string {
+	return filepath.Join(venvDir, "bin", "python3")
+}
+
+func ensurePython3Venv(venv string, packages ...string) (python3 string, err error) {
+	python3 = getPython3Executable(venv)
+
+	log.Info().
+		Str("python3", python3).
+		Interface("packages", packages).
+		Msg("ensure python3 venv")
+
+	// check if python3 venv is available
+	if !isPython3(python3) {
+		// python3 venv not available, create one
+		// check if system python3 is available
+		if err := RunCommand("python3", "--version"); err != nil {
+			return "", errors.Wrap(err, "python3 not found")
+		}
+
+		// check if .venv exists
+		if _, err := os.Stat(venv); err == nil {
+			// .venv exists, remove first
+			if err := RunCommand("rm", "-rf", venv); err != nil {
+				return "", errors.Wrap(err, "remove existed venv failed")
+			}
+		}
+
+		// create python3 .venv
+		if err := RunCommand("python3", "-m", "venv", venv); err != nil {
+			return "", errors.Wrap(err, "create python3 venv failed")
+		}
+	}
+
+	// install default python packages
+	for _, pkg := range packages {
+		err := InstallPythonPackage(python3, pkg)
+		if err != nil {
+			return "", errors.Wrap(err, fmt.Sprintf("pip install %s failed", pkg))
+		}
+	}
+
+	return python3, nil
+}
+
+func Command(name string, arg ...string) *exec.Cmd {
+	cmd := exec.Command(name, arg...)
+	cmd.SysProcAttr = &syscall.SysProcAttr{
+		Setpgid: true,
+	}
+	return cmd
+}
+
+func KillProcessesByGpid(cmd *exec.Cmd) error {
+	return syscall.Kill(-cmd.Process.Pid, syscall.SIGKILL)
+}