variables map

project2/base.tf

@@ -6,6 +6,14 @@ variable "c" {
   type = list
   default = ["foo", "bar", "baz"]
 }
+variable "d" {
+  type = map
+  default = {
+    "foo" = "bar"
+    "aze" = "rty"
+    "qsd" = "fgh"
+  }
+}
 
 output "ov1" {
   value = "${var.a}"
@@ -16,3 +24,6 @@ output "ov2" {
 output "ov3" {
   value = "${var.c[2]}"
 }
+output "ov4" {
+  value = "${var.d.foo}"
+}

project2/terraform.tfstate

@@ -1,7 +1,7 @@
 {
   "version": 4,
   "terraform_version": "0.12.24",
-  "serial": 8,
+  "serial": 9,
   "lineage": "53b98038-185e-af43-6c6c-521354912695",
   "outputs": {
     "ov1": {
@@ -13,7 +13,11 @@
       "type": "string"
     },
     "ov3": {
-      "value": "fgh",
+      "value": "baz",
+      "type": "string"
+    },
+    "ov4": {
+      "value": "bar",
       "type": "string"
     }
   },

project2/terraform.tfstate.backup

@@ -1,7 +1,7 @@
 {
   "version": 4,
   "terraform_version": "0.12.24",
-  "serial": 7,
+  "serial": 8,
   "lineage": "53b98038-185e-af43-6c6c-521354912695",
   "outputs": {
     "ov1": {
@@ -13,7 +13,7 @@
       "type": "string"
     },
     "ov3": {
-      "value": "baz",
+      "value": "fgh",
       "type": "string"
     }
   },