Escape shell vars in HCL output

CHANGELOG.md

@@ -1,3 +1,7 @@
+# 0.1.7
+
+- Escape shell vars in HCL output
+
 # 0.1.6
 
 - Fix crash when trying to use List resources

Makefile

@@ -1,6 +1,6 @@
 .PHONY: build docker docker-push release install test clean
 
-VERSION := 0.1.6
+VERSION := 0.1.7
 DOCKER_IMAGE_NAME := jrhouston/tfk8s
 
 build:

tfk8s.go

@@ -88,6 +88,12 @@ func snakify(s string) string {
 	return strings.ToLower(re.ReplaceAllString(s, "_"))
 }
 
+// escape incidences of ${} with $${} to prevent Terraform trying to interpolate them
+func escapeShellVars(s string) string {
+	r := regexp.MustCompile(`(\${.*?})`)
+	return r.ReplaceAllString(s, `$$$1`)
+}
+
 // yamlToHCL converts a single YAML document Terraform HCL
 func yamlToHCL(doc cty.Value, providerAlias string, stripServerSide bool, mapOnly bool) (string, error) {
 	m := doc.AsValueMap()
@@ -118,6 +124,7 @@ func yamlToHCL(doc cty.Value, providerAlias string, stripServerSide bool, mapOnl
 			doc = stripServerSideFields(doc)
 		}
 		s := terraform.FormatValue(doc, 0)
+		s = escapeShellVars(s)
 
 		if mapOnly {
 			hcl += fmt.Sprintf("%v\n", s)

tfk8s_test.go

@@ -40,6 +40,40 @@ resource "kubernetes_manifest" "configmap_test" {
 	assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(output))
 }
 
+func TestYAMLToTerraformResourcesEscapeShell(t *testing.T) {
+	yaml := `---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: test
+data:
+  SCRIPT: |
+    echo Hello, ${USER} your homedir is ${HOME}`
+
+	r := strings.NewReader(yaml)
+	output, err := YAMLToTerraformResources(r, "", false, false)
+
+	if err != nil {
+		t.Fatal("Converting to HCL failed:", err)
+	}
+
+	expected := `
+resource "kubernetes_manifest" "configmap_test" {
+  manifest = {
+    "apiVersion" = "v1"
+    "data" = {
+      "SCRIPT" = "echo Hello, $${USER} your homedir is $${HOME}"
+    }
+    "kind" = "ConfigMap"
+    "metadata" = {
+      "name" = "test"
+    }
+  }
+}`
+
+	assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(output))
+}
+
 func TestYAMLToTerraformResourcesMultiple(t *testing.T) {
 	yaml := `---
 apiVersion: v1