Golang Config.Development Examples

Example #1

File: toolsversionupdate.go Project: imoapps/juju

func checkToolsAvailability(cfg *config.Config, finder toolsFinder) (version.Number, error) {
	currentVersion, ok := cfg.AgentVersion()
	if !ok || currentVersion == version.Zero {
		return version.Zero, nil
	}

	env, err := newEnvirons(cfg)
	if err != nil {
		return version.Zero, errors.Annotatef(err, "cannot make environ")
	}

	// finder receives major and minor as parameters as it uses them to filter versions and
	// only return patches for the passed major.minor (from major.minor.patch).
	// We'll try the released stream first, then fall back to the current configured stream
	// if no released tools are found.
	vers, err := finder(env, currentVersion.Major, currentVersion.Minor, tools.ReleasedStream, coretools.Filter{})
	preferredStream := tools.PreferredStream(&currentVersion, cfg.Development(), cfg.AgentStream())
	if preferredStream != tools.ReleasedStream && errors.Cause(err) == coretools.ErrNoMatches {
		vers, err = finder(env, currentVersion.Major, currentVersion.Minor, preferredStream, coretools.Filter{})
	}
	if err != nil {
		return version.Zero, errors.Annotatef(err, "cannot find available tools")
	}
	// Newest also returns a list of the items in this list matching with the
	// newest version.
	newest, _ := vers.Newest()
	return newest, nil
}