Raise from enviroment added to transform

Author: jessehouwing

vsts-variable-set/v3/task.json

@@ -60,8 +60,7 @@
       "options": {
         "value": "value",
         "env": "env"
-      },
-      "aliases": ["variableName"]
+      }      
     },
     {
       "defaultValue": "",

vsts-variable-transform/v3/task.json

@@ -34,13 +34,37 @@
     }
   ],
   "inputs": [
+    {
+      "defaultValue": "value",
+      "helpMarkdown": "Take the value from the input or an environment variable.",
+      "label": "From",
+      "name": "From",
+      "required": true,
+      "type": "pickList",
+      "options": {
+        "value": "value",
+        "env": "env"
+      }      
+    },
     {
       "defaultValue": "",
-      "helpMarkdown": "Input value. You can use other variables as input as with any other text input using the `$(...)` notation anywhere in the value.",
-      "label": "Input Value",
-      "name": "value",
+      "helpMarkdown": "The value to assign to the variable.",
+      "label": "Value",
+      "name": "Value",
       "required": false,
-      "type": "string"
+      "type": "string",
+      "aliases": ["value"],
+      "visibleRule": "From=value"
+    },
+    {
+      "defaultValue": "",
+      "helpMarkdown": "The value to assign to the variable.",
+      "label": "Environment Variable",
+      "name": "Env",
+      "required": true,
+      "type": "string",
+      "aliases": ["Env", "Environment"],
+      "visibleRule": "From=env"
     },
     {
       "defaultValue": "",

vsts-variable-transform/v3/vsts-variable-transform.ts

@@ -1,7 +1,29 @@
 import * as tl from "azure-pipelines-task-lib/task";
 
 const transformAction = tl.getInput("transformAction", false) || "none";
-let value = tl.getInput("value") || "";
+
+function getValue()
+{
+    const from = tl.getInput("From") || "value";
+    switch (from)
+    {
+        case "value":
+        {
+            return tl.getInput("Value");
+        }
+        case "env":
+        {
+            return process.env[tl.getInput("Env", true)];
+        }
+        default:
+        {
+            return "";
+        }
+    }
+}
+
+let value = getValue() || "";
+
 const isSecret = tl.getBoolInput("isSecret") || false;
 const useTaskLib = tl.getBoolInput("useTasklib") || false;
 const variable = tl.getInput("variableName", true);