func InstallGoVersions()

in pkg/golang/install.go [39:79]
38 lines of code
12 McCabe index (conditional complexity)

func InstallGoVersions(rules *config.RepositoryRules) error {
	if rules == nil {
		return nil
	}

	defaultGoVersion := deprecatedDefaultGoVersion
	if rules.DefaultGoVersion != nil {
		defaultGoVersion = *rules.DefaultGoVersion
	}
	glog.Infof("Using %s as the default go version", defaultGoVersion)

	goVersions := []string{defaultGoVersion}
	for _, rule := range rules.Rules {
		for _, branch := range rule.Branches {
			if branch.GoVersion != "" {
				found := false
				for _, v := range goVersions {
					if v == branch.GoVersion {
						found = true
					}
				}
				if !found {
					goVersions = append(goVersions, branch.GoVersion)
				}
			}
		}
	}
	systemGoPath := os.Getenv("GOPATH")
	for _, v := range goVersions {
		if err := installGoVersion(v, filepath.Join(systemGoPath, "go-"+v)); err != nil {
			return err
		}
	}
	goLink, target := filepath.Join(systemGoPath, "go"), filepath.Join(systemGoPath, "go-"+defaultGoVersion)
	os.Remove(goLink)
	if err := os.Symlink(target, goLink); err != nil {
		return fmt.Errorf("failed to link %s to %s: %s", goLink, target, err)
	}

	return nil
}