Method Setup

buildtools/python/python_conda.go:194–242

Setup proactively installs conda if conda is not available. Returns the path to the conda binary and error if installation fails.

()

// Setup proactively installs conda if conda is not available.
// Returns the path to the conda binary and error if installation fails.
func (c *CondaPython) Setup() error {
	// Determine the expected conda binary path
	condaInstallDir := filepath.Join(dirs.WorkspaceDir, "downloads", "tools", "conda-"+c.condaVersion)
	condaBinDir := filepath.Join(condaInstallDir, expr.If(runtime.GOOS == "windows", "Scripts", "bin"))
	condaBinary := filepath.Join(condaBinDir, expr.If(runtime.GOOS == "windows", "conda.exe", "conda"))

	// Check if conda is already installed at the expected location.
	if fileio.PathExists(condaBinary) {
		if err := exec.Command(condaBinary, "--version").Run(); err == nil {
			c.condaBinary = condaBinary
			return nil
		}
	}

	// Need to install conda - get the conda installer
	condaInstallerPath, condaInstallDir, err := c.getCondaInstallerPaths()
	if err != nil {
		return fmt.Errorf("failed to locate conda installer: %w", err)
	}

	// Execute the conda installation script.
	if err := c.installConda(condaInstallerPath, condaInstallDir); err != nil {
		return fmt.Errorf("failed to execute conda installation: %w", err)
	}

	// Update PATH to include conda's bin directory.
	condaBinDir = filepath.Join(condaInstallDir, expr.If(runtime.GOOS == "windows", "Scripts", "bin"))
	if fileio.PathExists(condaBinDir) {
		os.Setenv("PATH", env.JoinPaths("PATH", condaBinDir))
	}

	// Verify conda binary exists after installation.
	if !fileio.PathExists(condaBinary) {
		return fmt.Errorf("conda binary not found at %s after installation", condaBinary)
	}

	// Configure conda to use conda-forge channel as default.
	// This enables conda-forge packages by default.
	tosCmd := exec.Command(condaBinary, "config", "--add", "channels", "conda-forge")
	if err := tosCmd.Run(); err != nil {
		return fmt.Errorf("Note: Could not configure conda-forge channel: %v", err)
	}

	// Note: Python version installation is handled by getPythonExecutable via conda create
	// This avoids conflicts in the base environment (e.g., conda-anaconda-tos package conflicts)
	// Each Python version is created in a dedicated conda environment (e.g., py311)
	c.condaBinary = condaBinary
	return nil
}

// getCondaInstallerPaths determines the paths to the conda installer and installation directory.
// Returns installer path and installation directory