template.extensions.json

{
  "$schema": "http://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "rootName": {
      "type": "string"
    },
    "extensions": {
      "type": "array"
    },
    "extensionsRoot": {
      "type": "string"
    },
    "contentRoot": {
      "type": "string"
    }
  },
  "variables": {
    "rootName" : "[concat(parameters('rootName'), '.')]"
  },
  "resources": [
    {
      "type": "Microsoft.Resources/deployments",
      "name": "[concat(variables('rootName'), '0')]",
      "apiVersion": "2015-01-01",
      "properties": {
        "templateLink": {
          "contentVersion": "1.0.0.0",
          "uri": "[concat(parameters('contentRoot'), '/extensions/emptyExtension.json')]"
        },
        "mode": "Incremental",
        "parameters": { }
      },
      "dependsOn": [
      ]
    },
    {
      "type": "Microsoft.Resources/deployments",
      "name": "[concat(variables('rootName'), add(copyIndex(),1))]",
      "apiVersion": "2015-01-01",
      "copy": {
        "name": "extensionsLoop",
        "count": "[length(parameters('extensions'))]"
      },
      "properties": {
        "templateLink": {
          "contentVersion": "1.0.0.0",
          "uri": "[concat(parameters('extensionsRoot'), '/', parameters('extensions')[copyIndex()].extension)]"
        },
        "mode": "Incremental",
        "parameters": {
          "commands": {
            "value": "[reference(concat(variables('rootName'), copyIndex())).outputs.result.value.commands]"
          },
          "nsgRules": {
            "value": "[reference(concat(variables('rootName'), copyIndex())).outputs.result.value.nsgRules]"
          },
          "exports": {
            "value": "[reference(concat(variables('rootName'), copyIndex())).outputs.result.value.exports]"
          },
          "internalExports": {
            "value": "[reference(concat(variables('rootName'), copyIndex())).outputs.result.value.internalExports]"
          },
          "ruleSeed": {
            "value": "[reference(concat(variables('rootName'), copyIndex())).outputs.result.value.ruleSeed]"
          },
          "data": {
            "value": "[parameters('extensions')[copyIndex()].data]"
          },
          "parentName": {
            "value": "[concat(variables('rootName'), add(copyIndex(),1))]"
          },
          "contentRoot": {
            "value": "[parameters('extensionsRoot')]"
          }
        }
      },
      "dependsOn": [
        "[concat(variables('rootName'), copyIndex())]"
      ]
    }
  ],
  "outputs": {
    "Result": {
      "type": "object",
      "value": "[reference(concat(variables('rootName'), length(parameters('extensions')))).outputs.result.value]"
    }
  }
}