shoebill/internal/controller/controller.go

package controller

import (
	"fmt"
	"path/filepath"

	"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/sopshelper"
	"git.badhouseplants.net/allanger/shoebill/internal/utils/workdir"
	"git.badhouseplants.net/allanger/shoebill/pkg/config"
	"git.badhouseplants.net/allanger/shoebill/pkg/lockfile"
	"git.badhouseplants.net/allanger/shoebill/pkg/release"
)

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

func Sync(definedWorkdirPath, sshKeyPath string, conf *config.Config, dry, diffArg bool) error {
	// Start by creating a directory where everything should be happening
	configPath := filepath.Dir(conf.ConfigPath)
	workdirPath, err := workdir.CreateWorkdir(definedWorkdirPath)
	if err != nil {
		return err
	}

	// Prepare helm repositories
	for _, repository := range conf.Repositories {
		if err := repository.KindFromUrl(); err != nil {
			return err
		}
	}

	// Configure a git client
	gh := githelper.NewGit(sshKeyPath)

	// The main logic starts here
	for _, cluster := range conf.Clusters {
		// Create a dir for the cluster git repo
		clusterWorkdirPath := fmt.Sprintf("%s/%s", workdirPath, cluster.Name)

		// Init a gitops provider (Currently onle flux is supported)
		provider, err := providers.NewProvider(cluster.Provider, clusterWorkdirPath, conf.SopsBin, gh)
		if err != nil {
			return err
		}

		if err := cluster.CloneRepo(gh, clusterWorkdirPath, dry); err != nil {
			return err
		}

		if err := cluster.BootstrapRepo(gh, clusterWorkdirPath, dry); err != nil {
			return err
		}

		// Read the lockfile generated by the shoebill
		lockfileData, err := lockfile.NewFromFile(clusterWorkdirPath)
		if err != nil {
			return err
		}

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

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

		// Init the helm client
		hh := helmhelper.NewHelm()

		// Init the sops client
		sops := sopshelper.NewSops()

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

			if diffArg {
				_, err := hh.PullChart(workdirPath, *release.RepositoryObj, release.Chart, release.Version)
				if err != nil {
					return err
				}
				hh.RenderChart(workdirPath, *release.RepositoryObj, release.Chart, release.Version)
			}

			if err := release.ValuesHandler(configPath); err != nil {
				return err
			}

			if err := release.SecretsHandler(configPath, sops); err != nil {
				return err
			}
		}

		releaseObj := release.FindReleaseByNames(cluster.Releases, conf.Releases)
		cluster.PopulateReleases(releaseObj)

		releasesCurrent, err := release.ReleasesFromLockfile(lockfileData, conf.Repositories)
		if err != nil {
			return err
		}

		if diffArg {
			for _, releaseCurrent := range releasesCurrent {
				hh.PullChart(workdirPath, *releaseCurrent.RepositoryObj, releaseCurrent.Chart, releaseCurrent.Version)
			}
		}

		// Compare releases from the lockfile to ones from the current cluster config
		diffReleases, err := diff.DiffReleases(releasesCurrent, cluster.ReleasesObj)
		if err != nil {
			return err
		}

		lockfile, diffRepos, err := diffReleases.Resolve(currentRepositories, clusterWorkdirPath)
		if err != nil {
			return err
		}

		if err := provider.SyncState(diffReleases, diffRepos); err != nil {
			return err
		}

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

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

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

	return nil
}