Function resolve

pkg/toolinstall/resolver.go:56–78

resolve checks if a command is available and installs it via install if needed. Returns the path to the usable binary.

(ctx context.Context, command, version string, install installFunc)

// resolve checks if a command is available and installs it via install if
// needed. Returns the path to the usable binary.
func resolve(ctx context.Context, command, version string, install installFunc) (string, error) {
	// Check system PATH first — return original command name (not full path)
	// so the caller uses it as-is via exec.Command.
	if _, err := exec.LookPath(command); err == nil {
		return command, nil
	}

	// Check if already installed in our bin dir.
	binPath := filepath.Join(BinDir(), command)
	if info, err := os.Stat(binPath); err == nil && info.Mode()&0o111 != 0 {
		return binPath, nil
	}

	// Use singleflight to deduplicate concurrent installs of the same command.
	result, err, _ := installGroup.Do(command, func() (any, error) {
		return safeInstall(ctx, command, version, install)
	})
	if err != nil {
		return "", err
	}

	return result.(string), nil
}

// safeInstall wraps install with panic recovery. Without this,
// singleflight wraps any panic in *panicError and re-raises it via