// findBootstrapTools returns a tools.List containing only those tools with
// which it would be reasonable to launch an environment's first machine,
// given the supplied constraints. If a specific agent version is not requested,
// all tools matching the current major.minor version are chosen.
func findBootstrapTools(env environs.Environ, vers *version.Number, arch, series *string) (list coretools.List, err error) {
// Construct a tools filter.
cliVersion := jujuversion.Current
var filter coretools.Filter
if arch != nil {
filter.Arch = *arch
}
if series != nil {
filter.Series = *series
}
if vers != nil {
filter.Number = *vers
}
stream := envtools.PreferredStream(vers, env.Config().Development(), env.Config().AgentStream())
return findTools(env, cliVersion.Major, cliVersion.Minor, stream, filter)
}
