Initial logic is implemented

internal/utils/helmhelper/helm.go

@@ -0,0 +1,120 @@
+package helmhelper
+
+import (
+	"fmt"
+	"os"
+
+	"git.badhouseplants.net/allanger/giops/internal/config/repository"
+	"github.com/sirupsen/logrus"
+	"gopkg.in/yaml.v2"
+	"helm.sh/helm/v3/pkg/action"
+	"helm.sh/helm/v3/pkg/cli"
+	"helm.sh/helm/v3/pkg/getter"
+	"helm.sh/helm/v3/pkg/registry"
+	"helm.sh/helm/v3/pkg/repo"
+)
+
+type Helm struct{}
+
+func NewHelm() Helmhelper {
+	return &Helm{}
+}
+
+type ChartData struct {
+	Version string
+}
+
+func (h *Helm) FindLatestVersion(dir, chart string, repository repository.Repository) (version string, err error) {
+	downloadDir := fmt.Sprintf("%s/.charts", dir)
+	if err := os.MkdirAll(downloadDir, 0777); err != nil {
+		return "", err
+	}
+	// If file doesn't exist
+	config := new(action.Configuration)
+	cl := cli.New()
+	chartDir := fmt.Sprintf("%s/%s-%s", downloadDir, repository.Name, chart)
+	_, err = os.Stat(chartDir)
+	if err != nil && !os.IsNotExist(err) {
+		return "", nil
+	} else if os.IsNotExist(err) {
+		if err := os.Mkdir(chartDir, 0777); err != nil {
+			return "", err
+		}
+
+		registry, err := registry.NewClient()
+		if err != nil {
+			return "", err
+		}
+
+		var path string
+		// Download the chart to the workdir
+		if repository.Kind != "oci" {
+			r, err := repo.NewChartRepository(&repo.Entry{
+				Name: repository.Name,
+				URL:  repository.URL,
+			}, getter.All(cl))
+			if err != nil {
+				return "", err
+			}
+			path = r.Config.Name
+
+		} else {
+			path = repository.URL
+		}
+
+		client := action.NewPullWithOpts(action.WithConfig(config))
+		client.SetRegistryClient(registry)
+		client.DestDir = chartDir
+		client.Settings = cl
+
+		chartRemote := fmt.Sprintf("%s/%s", path, chart)
+		logrus.Infof("trying to pull: %s", chartRemote)
+		if _, err = client.Run(chartRemote); err != nil {
+			return "", err
+		}
+
+	}
+
+	showAction := action.NewShowWithConfig(action.ShowChart, config)
+
+	chartPath, err := getChartPathFromDir(chartDir)
+	if err != nil {
+		return "", err
+	}
+
+	res, err := showAction.LocateChart(fmt.Sprintf("%s/%s", chartDir, chartPath), cl)
+	if err != nil {
+		return "", err
+	}
+	res, err = showAction.Run(res)
+	if err != nil {
+		return "", nil
+	}
+
+	chartData, err := chartFromString(res)
+	if err != nil {
+		return "", err
+	}
+	logrus.Infof("the latest version of %s is %s", chart, chartData.Version)
+	return chartData.Version, err
+}
+
+func getChartPathFromDir(dir string) (file string, err error) {
+	files, err := os.ReadDir(dir)
+	if err != nil {
+		return "", err
+	} else if len(files) == 0 {
+		return "", fmt.Errorf("expected to have one file, got zero in a dir %s", dir)
+	} else if len(files) > 1 {
+		return "", fmt.Errorf("expected to have only one file in a  dir %s", dir)
+	}
+	return files[0].Name(), nil
+}
+
+func chartFromString(info string) (*ChartData, error) {
+	chartData := new(ChartData)
+	if err := yaml.Unmarshal([]byte(info), &chartData); err != nil {
+		return nil, err
+	}
+	return chartData, nil
+}

internal/utils/helmhelper/mock.go

@@ -0,0 +1,15 @@
+package helmhelper
+
+import "git.badhouseplants.net/allanger/giops/internal/config/repository"
+
+const MOCK_LATEST_VERSION = "v1.12.1"
+
+type Mock struct{}
+
+func NewHelmMock() Helmhelper {
+	return &Mock{}
+}
+
+func (h *Mock) FindLatestVersion(dir, chart string, repository repository.Repository) (version string, err error) {
+	return MOCK_LATEST_VERSION, nil
+}

internal/utils/helmhelper/types.go

@@ -0,0 +1,7 @@
+package helmhelper
+
+import "git.badhouseplants.net/allanger/giops/internal/config/repository"
+
+type Helmhelper interface {
+	FindLatestVersion(dir, chart string, repository repository.Repository) (string, error)
+}