shoebill/internal/controller/controller.go

package controller

import (
	"fmt"

	"git.badhouseplants.net/allanger/shoebill/internal/config"
	"git.badhouseplants.net/allanger/shoebill/internal/config/release"
	"git.badhouseplants.net/allanger/shoebill/internal/lockfile"
	"git.badhouseplants.net/allanger/shoebill/internal/providers"
	"git.badhouseplants.net/allanger/shoebill/internal/utils/diff"
	"git.badhouseplants.net/allanger/shoebill/internal/utils/githelper"
	"git.badhouseplants.net/allanger/shoebill/internal/utils/helmhelper"
	"git.badhouseplants.net/allanger/shoebill/internal/utils/kustomize"
	"git.badhouseplants.net/allanger/shoebill/internal/utils/workdir"
)

func ReadTheConfig(path string) (*config.Config, error) {
	conf, err := config.NewConfigFromFile(path)
	if err != nil {
		return nil, err
	}
	return conf, nil
}

/*
* First it must prepare the workdir
* It must create a directorry and clone all the repos that are listed in the config
 */
func Reconcile(workdirPath, sshKeyPath string, conf *config.Config, dry bool) error {
	dir, err := workdir.CreateWorkdir(workdirPath)
	if err != nil {
		return err
	}
	for _, repository := range conf.Repositories {
		if err := repository.ValidateURL(); err != nil {
			return err
		}
		if err := repository.KindFromUrl(); err != nil {
			return err
		}
	}
	gh := githelper.NewGit(sshKeyPath)
	for _, cluster := range conf.Clusters {
		/*
		* 1. Clone the cluster repo
		* 2. Check if repo is already configured
		*    Yes -> Bootsrap the repo if it's not configured
		*      - Create the lockfile
		*      - ...
		*    No -> Get the current state
		* 3. Turn the config file into the lockfile format and compare the actual to the desired
		 */
		fullPath := fmt.Sprintf("%s/%s", dir, cluster.Name)
		provider, err := providers.NewProvider(cluster.Provider, fullPath, gh)
		if err != nil {
			return err
		}

		if err := cluster.CloneRepo(gh, fullPath, dry); err != nil {
			return err
		}
		err = cluster.BootstrapRepo(gh, fullPath, dry)
		if err != nil {
			return err
		}
		lockfileData, err := lockfile.NewFromFile(fullPath)
		if err != nil {
			return err
		}

		reposExisting, err := lockfileData.ReposFromLockfile()
		if err != nil {
			return err
		}

		if err := conf.Releases.PopulateRepositories(conf.Repositories); err != nil {
			return err
		}

		hh := helmhelper.NewHelm()
		for _, release := range conf.Releases {
			err := release.VersionHandler(workdirPath, hh)
			if err != nil {
				return err
			}
		}

		rsObj := release.FindReleaseByNames(cluster.Releases, conf.Releases)
		cluster.PopulateReleases(rsObj)
		releasesCurrent, err := release.ReleasesFromLockfile(lockfileData, conf.Repositories)
		if err != nil {
			return err
		}

		diffRls, err := diff.DiffReleases(releasesCurrent, cluster.ReleasesObj)
		if err != nil {
			return err
		}
		lockfile, err := diffRls.Resolve(reposExisting, fullPath)
		if err != nil {
			return err
		}

		if err := provider.SyncState(*diffRls); err != nil {
			return err
		}

		if err := kustomize.Generate(fullPath, gh); err != nil {
			return err
		}

		if err := lockfile.WriteToFile(fullPath); err != nil {
			return err
		}
		if err := gh.AddAllAndCommit(fullPath, "Update the lockfile"); err != nil {
			return err
		}
		if !dry {
			if err := gh.Push(fullPath); err != nil {
				return err
			}
		}

	}
	if !dry {
		if err := workdir.RemoveWorkdir(dir); err != nil {
			return err
		}
	}

	return nil
}