chore(configmap): Manage binary data in configMap

We should be now able to detect and manage binary files to be injected
in configMaps

generator/volume_test.go

@@ -2,8 +2,13 @@ package generator
 
 import (
 	"fmt"
+	"image"
+	"image/color"
+	"image/png"
 	"katenary/generator/labels"
+	"log"
 	"os"
+	"path/filepath"
 	"testing"
 
 	v1 "k8s.io/api/apps/v1"
@@ -149,6 +154,73 @@ services:
 	}
 }
 
+func TestBinaryMount(t *testing.T) {
+	composeFile := `
+services:
+  web:
+    image: nginx
+    volumes:
+      - ./images/foo.png:/var/www/foo
+    labels:
+      %[1]s/configmap-files: |-
+        - ./images/foo.png
+`
+	composeFile = fmt.Sprintf(composeFile, labels.KatenaryLabelPrefix)
+	tmpDir := setup(composeFile)
+	log.Println(tmpDir)
+	defer teardown(tmpDir)
+
+	os.Mkdir(filepath.Join(tmpDir, "images"), 0o755)
+
+	// create a png image
+	pngFile := tmpDir + "/images/foo.png"
+	w, h := 100, 100
+	img := image.NewRGBA(image.Rect(0, 0, w, h))
+	red := color.RGBA{255, 0, 0, 255}
+	for y := 0; y < h; y++ {
+		for x := 0; x < w; x++ {
+			img.Set(x, y, red)
+		}
+	}
+
+	blue := color.RGBA{0, 0, 255, 255}
+	for y := 30; y < 70; y++ {
+		for x := 30; x < 70; x++ {
+			img.Set(x, y, blue)
+		}
+	}
+	currentDir, _ := os.Getwd()
+	os.Chdir(tmpDir)
+	defer os.Chdir(currentDir)
+
+	f, err := os.Create(pngFile)
+	if err != nil {
+		t.Fatal(err)
+	}
+	png.Encode(f, img)
+	f.Close()
+	output := internalCompileTest(t, "-s", "templates/web/deployment.yaml")
+	d := v1.Deployment{}
+	yaml.Unmarshal([]byte(output), &d)
+	volumes := d.Spec.Template.Spec.Volumes
+	if len(volumes) != 1 {
+		t.Errorf("Expected 1 volume, got %d", len(volumes))
+	}
+
+	cm := corev1.ConfigMap{}
+	cmContent, err := helmTemplate(ConvertOptions{
+		OutputDir: "chart",
+	}, "-s", "templates/web/statics/images/configmap.yaml")
+	yaml.Unmarshal([]byte(cmContent), &cm)
+	if im, ok := cm.BinaryData["foo.png"]; !ok {
+		t.Errorf("Expected foo.png to be in the configmap")
+	} else {
+		if len(im) == 0 {
+			t.Errorf("Expected image to be non-empty")
+		}
+	}
+}
+
 func TestBindFrom(t *testing.T) {
 	composeFile := `
 services: