Method GetExecutable

buildtools/python/python_conda.go:118–186

GetPythonExecutable attempts to find or create Python via conda environments.

()

// GetPythonExecutable attempts to find or create Python via conda environments.
func (c *CondaPython) GetExecutable() (string, error) {
	// conda binary must be provided and exist
	if c.condaBinary == "" || !fileio.PathExists(c.condaBinary) {
		return "", fmt.Errorf("conda binary is required")
	}

	// Normalize version to minor version (e.g., 3.11.0 -> 3.11).
	minorVersion := c.pythonVersion
	if strings.Count(c.pythonVersion, ".") > 1 {
		parts := strings.Split(c.pythonVersion, ".")
		minorVersion = parts[0] + "." + parts[1]
	}

	// Use underscore in environment name instead of dots (py311 instead of python3.11).
	// This avoids issues with dots in environment names.
	envName := fmt.Sprintf("py%s", strings.ReplaceAll(minorVersion, ".", ""))

	// Try to find existing environment
	cmd := exec.Command(c.condaBinary, "run", "-n", envName, "python", "--version")
	if err := cmd.Run(); err == nil {
		var (
			output []byte
			err    error
		)

		// Environment exists, get the full path using platform-specific method.
		if runtime.GOOS == "windows" {
			output, err = exec.Command(c.condaBinary, "run", "-n", envName, "python", "-c", "import sys; print(sys.executable)").Output()
		} else {
			output, err = exec.Command(c.condaBinary, "run", "-n", envName, "which", "python").Output()
		}
		if err != nil {
			return "", fmt.Errorf("failed to get Python executable path: %w", err)
		}

		if len(output) > 0 {
			return strings.TrimSpace(string(output)), nil
		}
	}

	// Environment not found, attempt to create it with the specified Python version.
	// Use conda-forge channel as the default source.
	color.Printf(color.Hint, "- creating conda environment for Python %s (venv name: %s)", minorVersion, envName)
	createCmd := exec.Command(c.condaBinary, "create", "-y", "-c", "conda-forge", "-n", envName, fmt.Sprintf("python=%s", minorVersion))
	if output, err := createCmd.CombinedOutput(); err != nil {
		return "", fmt.Errorf("failed to create conda environment for Python %s -> %s -> %w",
			minorVersion, string(output), err)
	}
	color.PrintInline(color.Hint, "✔ creating conda environment for Python %s (venv name: %s)\n", minorVersion, envName)

	// Verify the new environment was created.
	cmd = exec.Command(c.condaBinary, "run", "-n", envName, "python", "--version")
	if err := cmd.Run(); err != nil {
		return "", fmt.Errorf("python environment verification failed: %w", err)
	}

	// Get the path to the python executable in this environment.
	var output []byte