feat(refacto): move everything in internal package

This allows to install katenary with `go install` and to clean up the
project folder.

internal/generator/tools_test.go

@@ -0,0 +1,80 @@
+package generator
+
+import (
+	"log"
+	"os"
+	"os/exec"
+	"testing"
+
+	"github.com/katenary/katenary/internal/parser"
+)
+
+const unmarshalError = "Failed to unmarshal the output: %s"
+
+func setup(content string) string {
+	// write the _compose_file in temporary directory
+	tmpDir, err := os.MkdirTemp("", "katenary")
+	if err != nil {
+		panic(err)
+	}
+	os.WriteFile(tmpDir+"/compose.yml", []byte(content), 0o644)
+	return tmpDir
+}
+
+func teardown(tmpDir string) {
+	// remove the temporary directory
+	log.Println("Removing temporary directory: ", tmpDir)
+	if err := os.RemoveAll(tmpDir); err != nil {
+		panic(err)
+	}
+}
+
+func internalCompileTest(t *testing.T, options ...string) string {
+	_, err := parser.Parse(nil, nil, "compose.yml")
+	if err != nil {
+		t.Fatalf("Failed to parse the project: %s", err)
+	}
+
+	force := false
+	outputDir := "./chart"
+	profiles := make([]string, 0)
+	helmdepUpdate := true
+	var appVersion *string
+	chartVersion := "0.1.0"
+	convertOptions := ConvertOptions{
+		Force:        force,
+		OutputDir:    outputDir,
+		Profiles:     profiles,
+		HelmUpdate:   helmdepUpdate,
+		AppVersion:   appVersion,
+		ChartVersion: chartVersion,
+	}
+	if err := Convert(convertOptions, "compose.yml"); err != nil {
+		log.Printf("Failed to convert: %s", err)
+		return err.Error()
+	}
+
+	// launch helm lint to check the generated chart
+	if helmLint(convertOptions) != nil {
+		t.Errorf("Failed to lint the generated chart")
+	}
+	// try with helm template
+	var output string
+	if output, err = helmTemplate(convertOptions, options...); err != nil {
+		t.Errorf("Failed to template the generated chart")
+		t.Fatalf("Output %s", output)
+	}
+	return output
+}
+
+func helmTemplate(options ConvertOptions, arguments ...string) (string, error) {
+	args := []string{"template", options.OutputDir}
+	args = append(args, arguments...)
+
+	cmd := exec.Command("helm", args...)
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		return string(output), err
+	}
+	return string(output), nil
+}