feat: with acceptest

dagger.go

@@ -0,0 +1,74 @@
+package daggerhelm
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path"
+	"text/template"
+
+	"dagger.io/dagger"
+)
+
+const CONTAINER_IMAGE = "docker.io/alpine/k8s:1.26.3"
+
+func Compile(ctx context.Context, client *dagger.Client, chartPath string, valuesFilePath string) (*dagger.Directory, error) {
+
+	chart := client.Host().Directory(chartPath)
+
+	tmpdir := os.TempDir()
+	err := os.MkdirAll(tmpdir, 0755)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create tmpdir: %v", err)
+	}
+	tmpvalues, err := os.CreateTemp(tmpdir, "")
+	if err != nil {
+		return nil, fmt.Errorf("could not create a tempdir. err: %v", err)
+	}
+	//defer func() {
+	//	if _, err := os.Stat(tmpdir); !errors.Is(err, os.ErrNotExist) {
+	//		err := os.RemoveAll(tmpdir)
+	//		if err != nil {
+	//			panic(err)
+	//		}
+	//	}
+	//}()
+
+	tmpl, err := template.New("helm-dagger").ParseFiles(valuesFilePath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to build template for values.yaml, err: %v", err)
+	}
+	err = tmpl.Execute(tmpvalues, struct{}{})
+	if err != nil {
+		return nil, fmt.Errorf("failed to execute template. err: %v", err)
+	}
+
+	err = tmpvalues.Sync()
+	if err != nil {
+		return nil, fmt.Errorf("failed to write to tmpfile. err: %v", err)
+	}
+
+	files, err := os.ReadDir(tmpdir)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read tmpdir. err: %v", err)
+	}
+
+	valuesFileDirPath := path.Dir(tmpdir)
+	valuesFileRelativePath := files[0].Name()
+	valuesFile := client.Host().Directory(valuesFileDirPath).File(valuesFileRelativePath)
+
+	helmoutput := client.Container().From(CONTAINER_IMAGE).WithWorkdir("/mnt").WithDirectory("chart", chart).WithFile("values.yaml", valuesFile).WithExec([]string{"helm", "template", ".", "--output-dir", "/mnt/output"})
+	if exitCode, err := helmoutput.ExitCode(ctx); err != nil || exitCode != 0 {
+		return nil, fmt.Errorf("failed to render helm chart: %v", err)
+	}
+
+	exported, err := helmoutput.Directory("/mnt/output").Export(ctx, "dist")
+	if err != nil {
+		return nil, fmt.Errorf("failed to export helm template: %v", err)
+	}
+	if !exported {
+		return nil, fmt.Errorf("nothing was exported")
+	}
+
+	return nil, nil
+}