Implement support for CI variables of type file

Add env_var and file as supported types for CI variables. Variables of
type file expose to users existing gitlab-runner behaviour - save
variable value into a temp file and set the path to this file in an ENV
var named after the variable key.

Resolves https://gitlab.com/gitlab-org/gitlab-ce/issues/46806.

app/assets/javascripts/ci_variable_list/ci_variable_list.js

@@ -26,6 +26,10 @@ export default class VariableList {
         selector: '.js-ci-variable-input-id',
         default: '',
       },
+      variable_type: {
+        selector: '.js-ci-variable-input-variable-type',
+        default: 'env_var',
+      },
       key: {
         selector: '.js-ci-variable-input-key',
         default: '',

app/assets/javascripts/ci_variable_list/native_form_variable_list.js

@@ -19,6 +19,7 @@ export default function setupNativeFormVariableList({ container, formField = 'va
     const isTouched = variableList.checkIfRowTouched($lastRow);
     if (!isTouched) {
       $lastRow.find('input, textarea').attr('name', '');
+      $lastRow.find('select').attr('name', '');
     }
   });
 }

app/controllers/groups/variables_controller.rb

@@ -41,7 +41,7 @@ module Groups
     end
 
     def variable_params_attributes
-      %i[id key secret_value protected masked _destroy]
+      %i[id variable_type key secret_value protected masked _destroy]
     end
 
     def authorize_admin_build!

app/controllers/projects/pipeline_schedules_controller.rb

@@ -98,7 +98,7 @@ class Projects::PipelineSchedulesController < Projects::ApplicationController
   def schedule_params
     params.require(:schedule)
       .permit(:description, :cron, :cron_timezone, :ref, :active,
-        variables_attributes: [:id, :key, :secret_value, :_destroy] )
+        variables_attributes: [:id, :variable_type, :key, :secret_value, :_destroy] )
   end
 
   def authorize_play_pipeline_schedule!

app/controllers/projects/pipelines_controller.rb

@@ -169,7 +169,7 @@ class Projects::PipelinesController < Projects::ApplicationController
   end
 
   def create_params
-    params.require(:pipeline).permit(:ref, variables_attributes: %i[key secret_value])
+    params.require(:pipeline).permit(:ref, variables_attributes: %i[key variable_type secret_value])
   end
 
   # rubocop: disable CodeReuse/ActiveRecord

app/controllers/projects/variables_controller.rb

@@ -38,6 +38,6 @@ class Projects::VariablesController < Projects::ApplicationController
   end
 
   def variable_params_attributes
-    %i[id key secret_value protected masked _destroy]
+    %i[id variable_type key secret_value protected masked _destroy]
   end
 end

app/helpers/ci_variables_helper.rb

@@ -20,4 +20,11 @@ module CiVariablesHelper
       true
     end
   end
+
+  def ci_variable_type_options
+    [
+      %w(Variable env_var),
+      %w(File file)
+    ]
+  end
 end

app/models/concerns/has_variable.rb

@@ -4,6 +4,11 @@ module HasVariable
   extend ActiveSupport::Concern
 
   included do
+    enum variable_type: {
+      env_var: 1,
+      file: 2
+    }
+
     validates :key,
       presence: true,
       length: { maximum: 255 },
@@ -24,6 +29,6 @@ module HasVariable
   end
 
   def to_runner_variable
-    { key: key, value: value, public: false }
+    { key: key, value: value, public: false, file: file? }
   end
 end

app/views/ci/variables/_variable_row.html.haml

@@ -3,6 +3,7 @@
 - only_key_value = local_assigns.fetch(:only_key_value, false)
 
 - id = variable&.id
+- variable_type = variable&.variable_type
 - key = variable&.key
 - value = variable&.value
 - is_protected_default = ci_variable_protected_by_default?
@@ -12,6 +13,7 @@
 
 - id_input_name = "#{form_field}[variables_attributes][][id]"
 - destroy_input_name = "#{form_field}[variables_attributes][][_destroy]"
+- variable_type_input_name = "#{form_field}[variables_attributes][][variable_type]"
 - key_input_name = "#{form_field}[variables_attributes][][key]"
 - value_input_name = "#{form_field}[variables_attributes][][secret_value]"
 - protected_input_name = "#{form_field}[variables_attributes][][protected]"
@@ -21,6 +23,8 @@
   .ci-variable-row-body
     %input.js-ci-variable-input-id{ type: "hidden", name: id_input_name, value: id }
     %input.js-ci-variable-input-destroy{ type: "hidden", name: destroy_input_name }
+    %select.js-ci-variable-input-variable-type.ci-variable-body-item.form-control.select-control{ name: variable_type_input_name }
+      = options_for_select(ci_variable_type_options, variable_type)
     %input.js-ci-variable-input-key.ci-variable-body-item.qa-ci-variable-input-key.form-control{ type: "text",
       name: key_input_name,
       value: key,

changelogs/unreleased/46806-typed-ci-variables.yml

+---
+title: CI variables of type file
+merge_request: 27112
+author:
+type: added

db/migrate/20190415030217_add_variable_type_to_ci_variables.rb

+# frozen_string_literal: true
+
+class AddVariableTypeToCiVariables < ActiveRecord::Migration[5.0]
+  include Gitlab::Database::MigrationHelpers
+  disable_ddl_transaction!
+
+  DOWNTIME = false
+  ENV_VAR_VARIABLE_TYPE = 1
+
+  def up
+    add_column_with_default(:ci_variables, :variable_type, :smallint, default: ENV_VAR_VARIABLE_TYPE)
+  end
+
+  def down
+    remove_column(:ci_variables, :variable_type)
+  end
+end

db/migrate/20190416213556_add_variable_type_to_ci_group_variables.rb

+# frozen_string_literal: true
+
+class AddVariableTypeToCiGroupVariables < ActiveRecord::Migration[5.0]
+  include Gitlab::Database::MigrationHelpers
+  disable_ddl_transaction!
+
+  DOWNTIME = false
+  ENV_VAR_VARIABLE_TYPE = 1
+
+  def up
+    add_column_with_default(:ci_group_variables, :variable_type, :smallint, default: ENV_VAR_VARIABLE_TYPE)
+  end
+
+  def down
+    remove_column(:ci_group_variables, :variable_type)
+  end
+end

db/migrate/20190416213615_add_variable_type_to_ci_pipeline_variables.rb

+# frozen_string_literal: true
+
+class AddVariableTypeToCiPipelineVariables < ActiveRecord::Migration[5.0]
+  include Gitlab::Database::MigrationHelpers
+  disable_ddl_transaction!
+
+  DOWNTIME = false
+  ENV_VAR_VARIABLE_TYPE = 1
+
+  def up
+    add_column_with_default(:ci_pipeline_variables, :variable_type, :smallint, default: ENV_VAR_VARIABLE_TYPE)
+  end
+
+  def down
+    remove_column(:ci_pipeline_variables, :variable_type)
+  end
+end

db/migrate/20190416213631_add_variable_type_to_ci_pipeline_schedule_variables.rb

+# frozen_string_literal: true
+
+class AddVariableTypeToCiPipelineScheduleVariables < ActiveRecord::Migration[5.0]
+  include Gitlab::Database::MigrationHelpers
+  disable_ddl_transaction!
+
+  DOWNTIME = false
+  ENV_VAR_VARIABLE_TYPE = 1
+
+  def up
+    add_column_with_default(:ci_pipeline_schedule_variables, :variable_type, :smallint, default: ENV_VAR_VARIABLE_TYPE)
+  end
+
+  def down
+    remove_column(:ci_pipeline_schedule_variables, :variable_type)
+  end
+end

db/schema.rb

@@ -419,6 +419,7 @@ ActiveRecord::Schema.define(version: 20190426180107) do
     t.datetime_with_timezone "created_at", null: false
     t.datetime_with_timezone "updated_at", null: false
     t.boolean "masked", default: false, null: false
+    t.integer "variable_type", limit: 2, default: 1, null: false
     t.index ["group_id", "key"], name: "index_ci_group_variables_on_group_id_and_key", unique: true, using: :btree
   end
 
@@ -458,6 +459,7 @@ ActiveRecord::Schema.define(version: 20190426180107) do
     t.integer "pipeline_schedule_id", null: false
     t.datetime_with_timezone "created_at"
     t.datetime_with_timezone "updated_at"
+    t.integer "variable_type", limit: 2, default: 1, null: false
     t.index ["pipeline_schedule_id", "key"], name: "index_ci_pipeline_schedule_variables_on_schedule_id_and_key", unique: true, using: :btree
   end
 
@@ -484,6 +486,7 @@ ActiveRecord::Schema.define(version: 20190426180107) do
     t.string "encrypted_value_salt"
     t.string "encrypted_value_iv"
     t.integer "pipeline_id", null: false
+    t.integer "variable_type", limit: 2, default: 1, null: false
     t.index ["pipeline_id", "key"], name: "index_ci_pipeline_variables_on_pipeline_id_and_key", unique: true, using: :btree
   end
 
@@ -618,6 +621,7 @@ ActiveRecord::Schema.define(version: 20190426180107) do
     t.boolean "protected", default: false, null: false
     t.string "environment_scope", default: "*", null: false
     t.boolean "masked", default: false, null: false
+    t.integer "variable_type", limit: 2, default: 1, null: false
     t.index ["project_id", "key", "environment_scope"], name: "index_ci_variables_on_project_id_and_key_and_environment_scope", unique: true, using: :btree
   end
 

doc/api/group_level_variables.md

@@ -22,10 +22,12 @@ curl --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/a
 [
     {
         "key": "TEST_VARIABLE_1",
+        "variable_type": "env_var",
         "value": "TEST_1"
     },
     {
         "key": "TEST_VARIABLE_2",
+        "variable_type": "env_var",
         "value": "TEST_2"
     }
 ]
@@ -51,6 +53,7 @@ curl --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/a
 ```json
 {
     "key": "TEST_VARIABLE_1",
+    "variable_type": "env_var",
     "value": "TEST_1"
 }
 ```
@@ -63,12 +66,13 @@ Create a new variable.
 POST /groups/:id/variables
 ```
 
-| Attribute   | Type    | required | Description           |
-|-------------|---------|----------|-----------------------|
-| `id`        | integer/string | yes      | The ID of a group or [URL-encoded path of the group](README.md#namespaced-path-encoding) owned by the authenticated user   |
-| `key`       | string  | yes      | The `key` of a variable; must have no more than 255 characters; only `A-Z`, `a-z`, `0-9`, and `_` are allowed |
-| `value`     | string  | yes      | The `value` of a variable |
-| `protected` | boolean | no       | Whether the variable is protected |
+| Attribute       | Type    | required | Description           |
+|-----------------|---------|----------|-----------------------|
+| `id`            | integer/string | yes      | The ID of a group or [URL-encoded path of the group](README.md#namespaced-path-encoding) owned by the authenticated user   |
+| `key`           | string  | yes      | The `key` of a variable; must have no more than 255 characters; only `A-Z`, `a-z`, `0-9`, and `_` are allowed |
+| `value`         | string  | yes      | The `value` of a variable |
+| `variable_type` | string  | no       | The type of a variable. Available types are: `env_var` (default) and `file` |
+| `protected`     | boolean | no       | Whether the variable is protected |
 
 ```
 curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/groups/1/variables" --form "key=NEW_VARIABLE" --form "value=new value"
@@ -78,6 +82,7 @@ curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" "https://gitla
 {
     "key": "NEW_VARIABLE",
     "value": "new value",
+    "variable_type": "env_var",
     "protected": false
 }
 ```
@@ -90,12 +95,13 @@ Update a group's variable.
 PUT /groups/:id/variables/:key
 ```
 
-| Attribute   | Type    | required | Description             |
-|-------------|---------|----------|-------------------------|
-| `id`        | integer/string | yes      | The ID of a group or [URL-encoded path of the group](README.md#namespaced-path-encoding) owned by the authenticated user     |
-| `key`       | string  | yes      | The `key` of a variable   |
-| `value`     | string  | yes      | The `value` of a variable |
-| `protected` | boolean | no       | Whether the variable is protected |
+| Attribute       | Type    | required | Description             |
+|-----------------|---------|----------|-------------------------|
+| `id`            | integer/string | yes      | The ID of a group or [URL-encoded path of the group](README.md#namespaced-path-encoding) owned by the authenticated user     |
+| `key`           | string  | yes      | The `key` of a variable   |
+| `value`         | string  | yes      | The `value` of a variable |
+| `variable_type` | string  | no       | The type of a variable. Available types are: `env_var` (default) and `file` |
+| `protected`     | boolean | no       | Whether the variable is protected |
 
 ```
 curl --request PUT --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/groups/1/variables/NEW_VARIABLE" --form "value=updated value"
@@ -105,6 +111,7 @@ curl --request PUT --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab
 {
     "key": "NEW_VARIABLE",
     "value": "updated value",
+    "variable_type": "env_var",
     "protected": true
 }
 ```

doc/api/pipeline_schedules.md

@@ -88,6 +88,7 @@ curl --header "PRIVATE-TOKEN: k5ESFgWY2Qf5xEvDcFxZ" "https://gitlab.example.com/
     "variables": [
         {
             "key": "TEST_VARIABLE_1",
+            "variable_type": "env_var",
             "value": "TEST_1"
         }
     ]
@@ -296,6 +297,7 @@ POST /projects/:id/pipeline_schedules/:pipeline_schedule_id/variables
 | `pipeline_schedule_id` | integer        | yes      | The pipeline schedule id |
 | `key`                  | string         | yes      | The `key` of a variable; must have no more than 255 characters; only `A-Z`, `a-z`, `0-9`, and `_` are allowed |
 | `value`                | string         | yes      | The `value` of a variable |
+| `variable_type`        | string         | no       | The type of a variable. Available types are: `env_var` (default) and `file` |
 
 ```sh
 curl --request POST --header "PRIVATE-TOKEN: k5ESFgWY2Qf5xEvDcFxZ" --form "key=NEW_VARIABLE" --form "value=new value" "https://gitlab.example.com/api/v4/projects/29/pipeline_schedules/13/variables"
@@ -304,6 +306,7 @@ curl --request POST --header "PRIVATE-TOKEN: k5ESFgWY2Qf5xEvDcFxZ" --form "key=N
 ```json
 {
     "key": "NEW_VARIABLE",
+    "variable_type": "env_var",
     "value": "new value"
 }
 ```
@@ -322,6 +325,7 @@ PUT /projects/:id/pipeline_schedules/:pipeline_schedule_id/variables/:key
 | `pipeline_schedule_id` | integer        | yes      | The pipeline schedule id |
 | `key`                  | string         | yes      | The `key` of a variable   |
 | `value`                | string         | yes      | The `value` of a variable |
+| `variable_type`        | string         | no       | The type of a variable. Available types are: `env_var` (default) and `file` |
 
 ```sh
 curl --request PUT --header "PRIVATE-TOKEN: k5ESFgWY2Qf5xEvDcFxZ" --form "value=updated value" "https://gitlab.example.com/api/v4/projects/29/pipeline_schedules/13/variables/NEW_VARIABLE"
@@ -331,6 +335,7 @@ curl --request PUT --header "PRIVATE-TOKEN: k5ESFgWY2Qf5xEvDcFxZ" --form "value=
 {
     "key": "NEW_VARIABLE",
     "value": "updated value"
+    "variable_type": "env_var",
 }
 ```
 

doc/api/pipelines.md

@@ -114,6 +114,7 @@ Example of response
 [
   {
     "key": "RUN_NIGHTLY_BUILD",
+    "variable_type": "env_var",
     "value": "true"
   },
   {
@@ -135,7 +136,7 @@ POST /projects/:id/pipeline
 |------------|---------|----------|---------------------|
 | `id`       | integer/string | yes      | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user |
 | `ref`       | string | yes      | Reference to commit |
-| `variables` | array | no | An array containing the variables available in the pipeline, matching the structure [{ 'key' => 'UPLOAD_TO_S3', 'value' => 'true' }] |
+| `variables` | array | no | An array containing the variables available in the pipeline, matching the structure [{ 'key' => 'UPLOAD_TO_S3', 'variable_type' => 'file', 'value' => 'true' }] |
 
 ```
 curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/projects/1/pipeline?ref=master"

doc/api/project_level_variables.md

@@ -20,10 +20,12 @@ curl --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/a
 [
     {
         "key": "TEST_VARIABLE_1",
+        "variable_type": "env_var",
         "value": "TEST_1"
     },
     {
         "key": "TEST_VARIABLE_2",
+        "variable_type": "env_var",
         "value": "TEST_2"
     }
 ]
@@ -49,6 +51,7 @@ curl --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/a
 ```json
 {
     "key": "TEST_VARIABLE_1",
+    "variable_type": "env_var",
     "value": "TEST_1"
 }
 ```
@@ -61,12 +64,13 @@ Create a new variable.
 POST /projects/:id/variables
 ```
 
-| Attribute   | Type    | required | Description           |
-|-------------|---------|----------|-----------------------|
-| `id`        | integer/string | yes      | The ID of a project or [urlencoded NAMESPACE/PROJECT_NAME of the project](README.md#namespaced-path-encoding) owned by the authenticated user   |
-| `key`       | string  | yes      | The `key` of a variable; must have no more than 255 characters; only `A-Z`, `a-z`, `0-9`, and `_` are allowed |
-| `value`     | string  | yes      | The `value` of a variable |
-| `protected` | boolean | no       | Whether the variable is protected |
+| Attribute       | Type    | required | Description           |
+|-----------------|---------|----------|-----------------------|
+| `id`            | integer/string | yes      | The ID of a project or [urlencoded NAMESPACE/PROJECT_NAME of the project](README.md#namespaced-path-encoding) owned by the authenticated user   |
+| `key`           | string  | yes      | The `key` of a variable; must have no more than 255 characters; only `A-Z`, `a-z`, `0-9`, and `_` are allowed |
+| `value`         | string  | yes      | The `value` of a variable |
+| `variable_type` | string  | no       | The type of a variable. Available types are: `env_var` (default) and `file` |
+| `protected`     | boolean | no       | Whether the variable is protected |
 
 ```
 curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/projects/1/variables" --form "key=NEW_VARIABLE" --form "value=new value"
@@ -76,6 +80,7 @@ curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" "https://gitla
 {
     "key": "NEW_VARIABLE",
     "value": "new value",
+    "variable_type": "env_var",
     "protected": false
 }
 ```
@@ -88,12 +93,13 @@ Update a project's variable.
 PUT /projects/:id/variables/:key
 ```
 
-| Attribute   | Type    | required | Description             |
-|-------------|---------|----------|-------------------------|
-| `id`        | integer/string | yes      | The ID of a project or [urlencoded NAMESPACE/PROJECT_NAME of the project](README.md#namespaced-path-encoding) owned by the authenticated user     |
-| `key`       | string  | yes      | The `key` of a variable   |
-| `value`     | string  | yes      | The `value` of a variable |
-| `protected` | boolean | no       | Whether the variable is protected |
+| Attribute       | Type    | required | Description             |
+|-----------------|---------|----------|-------------------------|
+| `id`            | integer/string | yes      | The ID of a project or [urlencoded NAMESPACE/PROJECT_NAME of the project](README.md#namespaced-path-encoding) owned by the authenticated user     |
+| `key`           | string  | yes      | The `key` of a variable   |
+| `value`         | string  | yes      | The `value` of a variable |
+| `variable_type` | string  | no       | The type of a variable. Available types are: `env_var` (default) and `file` |
+| `protected`     | boolean | no       | Whether the variable is protected |
 
 ```
 curl --request PUT --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/projects/1/variables/NEW_VARIABLE" --form "value=updated value"
@@ -103,6 +109,7 @@ curl --request PUT --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab
 {
     "key": "NEW_VARIABLE",
     "value": "updated value",
+    "variable_type": "env_var",
     "protected": true
 }
 ```

lib/api/entities.rb

@@ -1288,7 +1288,7 @@ module API
     end
 
     class Variable < Grape::Entity
-      expose :key, :value
+      expose :variable_type, :key, :value
       expose :protected?, as: :protected, if: -> (entity, _) { entity.respond_to?(:protected?) }
     end
 

lib/api/group_variables.rb

@@ -47,6 +47,7 @@ module API
         requires :key, type: String, desc: 'The key of the variable'
         requires :value, type: String, desc: 'The value of the variable'
         optional :protected, type: String, desc: 'Whether the variable is protected'
+        optional :variable_type, type: String, values: Ci::GroupVariable.variable_types.keys, desc: 'The type of variable, must be one of env_var or file. Defaults to env_var'
       end
       post ':id/variables' do
         variable_params = declared_params(include_missing: false)
@@ -67,6 +68,7 @@ module API
         optional :key, type: String, desc: 'The key of the variable'
         optional :value, type: String, desc: 'The value of the variable'
         optional :protected, type: String, desc: 'Whether the variable is protected'
+        optional :variable_type, type: String, values: Ci::GroupVariable.variable_types.keys, desc: 'The type of variable, must be one of env_var or file'
       end
       # rubocop: disable CodeReuse/ActiveRecord
       put ':id/variables/:key' do

lib/api/pipeline_schedules.rb

@@ -118,6 +118,7 @@ module API
         requires :pipeline_schedule_id, type: Integer, desc: 'The pipeline schedule id'
         requires :key, type: String, desc: 'The key of the variable'
         requires :value, type: String, desc: 'The value of the variable'
+        optional :variable_type, type: String, values: Ci::PipelineScheduleVariable.variable_types.keys, desc: 'The type of variable, must be one of env_var or file. Defaults to env_var'
       end
       post ':id/pipeline_schedules/:pipeline_schedule_id/variables' do
         authorize! :update_pipeline_schedule, pipeline_schedule
@@ -138,6 +139,7 @@ module API
         requires :pipeline_schedule_id, type: Integer, desc: 'The pipeline schedule id'
         requires :key, type: String, desc: 'The key of the variable'
         optional :value, type: String, desc: 'The value of the variable'
+        optional :variable_type, type: String, values: Ci::PipelineScheduleVariable.variable_types.keys, desc: 'The type of variable, must be one of env_var or file'
       end
       put ':id/pipeline_schedules/:pipeline_schedule_id/variables/:key' do
         authorize! :update_pipeline_schedule, pipeline_schedule

lib/api/variables.rb

@@ -55,6 +55,7 @@ module API
         requires :key, type: String, desc: 'The key of the variable'
         requires :value, type: String, desc: 'The value of the variable'
         optional :protected, type: String, desc: 'Whether the variable is protected'
+        optional :variable_type, type: String, values: Ci::Variable.variable_types.keys, desc: 'The type of variable, must be one of env_var or file. Defaults to env_var'
 
         if Gitlab.ee?
           optional :environment_scope, type: String, desc: 'The environment_scope of the variable'
@@ -80,6 +81,7 @@ module API
         optional :key, type: String, desc: 'The key of the variable'
         optional :value, type: String, desc: 'The value of the variable'
         optional :protected, type: String, desc: 'Whether the variable is protected'
+        optional :variable_type, type: String, values: Ci::Variable.variable_types.keys, desc: 'The type of variable, must be one of env_var or file'
 
         if Gitlab.ee?
           optional :environment_scope, type: String, desc: 'The environment_scope of the variable'

spec/controllers/projects/pipeline_schedules_controller_spec.rb

@@ -91,7 +91,7 @@ describe Projects::PipelineSchedulesController do
       context 'when variables_attributes has one variable' do
         let(:schedule) do
           basic_param.merge({
-            variables_attributes: [{ key: 'AAA', secret_value: 'AAA123' }]
+            variables_attributes: [{ key: 'AAA', secret_value: 'AAA123', variable_type: 'file' }]
           })
         end
 
@@ -105,6 +105,7 @@ describe Projects::PipelineSchedulesController do
           Ci::PipelineScheduleVariable.last.tap do |v|
             expect(v.key).to eq("AAA")
             expect(v.value).to eq("AAA123")
+            expect(v.variable_type).to eq("file")
           end
         end
       end

spec/factories/ci/pipeline_schedule_variables.rb

@@ -2,6 +2,7 @@ FactoryBot.define do
   factory :ci_pipeline_schedule_variable, class: Ci::PipelineScheduleVariable do
     sequence(:key) { |n| "VARIABLE_#{n}" }
     value 'VARIABLE_VALUE'
+    variable_type 'env_var'
 
     pipeline_schedule factory: :ci_pipeline_schedule
   end

spec/fixtures/api/schemas/pipeline_schedule.json

@@ -33,7 +33,7 @@
       "additionalProperties": false
     },
     "variables": {
-      "type": ["array", "null"],
+      "type": "array",
       "items": { "$ref": "pipeline_schedule_variable.json" }
     }
   },

spec/fixtures/api/schemas/pipeline_schedule_variable.json

 {
-  "type": ["object", "null"],
+  "type": "object",
+  "required": [
+    "key",
+    "value",
+    "variable_type"
+  ],
   "properties": {
     "key": { "type": "string" },
-    "value": { "type": "string" }
+    "value": { "type": "string" },
+    "variable_type": { "type": "string" }
   },
   "additionalProperties": false
 }

spec/models/ci/group_variable_spec.rb

@@ -5,7 +5,8 @@ require 'spec_helper'
 describe Ci::GroupVariable do
   subject { build(:ci_group_variable) }
 
-  it { is_expected.to include_module(HasVariable) }
+  it_behaves_like "CI variable"
+
   it { is_expected.to include_module(Presentable) }
   it { is_expected.to include_module(Maskable) }
   it { is_expected.to validate_uniqueness_of(:key).scoped_to(:group_id).with_message(/\(\w+\) has already been taken/) }

spec/models/ci/pipeline_schedule_variable_spec.rb

@@ -5,5 +5,5 @@ require 'spec_helper'
 describe Ci::PipelineScheduleVariable do
   subject { build(:ci_pipeline_schedule_variable) }
 
-  it { is_expected.to include_module(HasVariable) }
+  it_behaves_like "CI variable"
 end

spec/models/ci/pipeline_variable_spec.rb

@@ -5,7 +5,8 @@ require 'spec_helper'
 describe Ci::PipelineVariable do
   subject { build(:ci_pipeline_variable) }
 
-  it { is_expected.to include_module(HasVariable) }
+  it_behaves_like "CI variable"
+
   it { is_expected.to validate_uniqueness_of(:key).scoped_to(:pipeline_id) }
 
   describe '#hook_attrs' do

spec/models/ci/variable_spec.rb

@@ -5,8 +5,9 @@ require 'spec_helper'
 describe Ci::Variable do
   subject { build(:ci_variable) }
 
+  it_behaves_like "CI variable"
+
   describe 'validations' do
-    it { is_expected.to include_module(HasVariable) }
     it { is_expected.to include_module(Presentable) }
     it { is_expected.to include_module(Maskable) }
     it { is_expected.to validate_uniqueness_of(:key).scoped_to(:project_id, :environment_scope).with_message(/\(\w+\) has already been taken/) }

spec/requests/api/group_variables_spec.rb

@@ -51,6 +51,7 @@ describe API::GroupVariables do
         expect(response).to have_gitlab_http_status(200)
         expect(json_response['value']).to eq(variable.value)
         expect(json_response['protected']).to eq(variable.protected?)
+        expect(json_response['variable_type']).to eq(variable.variable_type)
       end
 
       it 'responds with 404 Not Found if requesting non-existing variable' do
@@ -94,17 +95,19 @@ describe API::GroupVariables do
         expect(json_response['key']).to eq('TEST_VARIABLE_2')
         expect(json_response['value']).to eq('PROTECTED_VALUE_2')
         expect(json_response['protected']).to be_truthy
+        expect(json_response['variable_type']).to eq('env_var')
       end
 
       it 'creates variable with optional attributes' do
         expect do
-          post api("/groups/#{group.id}/variables", user), params: { key: 'TEST_VARIABLE_2', value: 'VALUE_2' }
+          post api("/groups/#{group.id}/variables", user), params: { variable_type: 'file', key: 'TEST_VARIABLE_2', value: 'VALUE_2' }
         end.to change {group.variables.count}.by(1)
 
         expect(response).to have_gitlab_http_status(201)
         expect(json_response['key']).to eq('TEST_VARIABLE_2')
         expect(json_response['value']).to eq('VALUE_2')
         expect(json_response['protected']).to be_falsey
+        expect(json_response['variable_type']).to eq('file')
       end
 
       it 'does not allow to duplicate variable key' do
@@ -145,7 +148,7 @@ describe API::GroupVariables do
         initial_variable = group.variables.reload.first
         value_before = initial_variable.value
 
-        put api("/groups/#{group.id}/variables/#{variable.key}", user), params: { value: 'VALUE_1_UP', protected: true }
+        put api("/groups/#{group.id}/variables/#{variable.key}", user), params: { variable_type: 'file', value: 'VALUE_1_UP', protected: true }
 
         updated_variable = group.variables.reload.first
 
@@ -153,6 +156,7 @@ describe API::GroupVariables do
         expect(value_before).to eq(variable.value)
         expect(updated_variable.value).to eq('VALUE_1_UP')
         expect(updated_variable).to be_protected
+        expect(json_response['variable_type']).to eq('file')
       end
 
       it 'responds with 404 Not Found if requesting non-existing variable' do

spec/requests/api/pipeline_schedules_spec.rb

@@ -91,6 +91,7 @@ describe API::PipelineSchedules do
     let(:pipeline_schedule) { create(:ci_pipeline_schedule, project: project, owner: developer) }
 
     before do
+      pipeline_schedule.variables << build(:ci_pipeline_schedule_variable)
       pipeline_schedule.pipelines << build(:ci_pipeline, project: project)
     end
 
@@ -331,13 +332,14 @@ describe API::PipelineSchedules do
         it 'creates pipeline_schedule_variable' do
           expect do
             post api("/projects/#{project.id}/pipeline_schedules/#{pipeline_schedule.id}/variables", developer),
-              params: params
+              params: params.merge(variable_type: 'file')
           end.to change { pipeline_schedule.variables.count }.by(1)
 
           expect(response).to have_gitlab_http_status(:created)
           expect(response).to match_response_schema('pipeline_schedule_variable')
           expect(json_response['key']).to eq(params[:key])
           expect(json_response['value']).to eq(params[:value])
+          expect(json_response['variable_type']).to eq('file')
         end
       end
 
@@ -389,11 +391,12 @@ describe API::PipelineSchedules do
     context 'authenticated user with valid permissions' do
       it 'updates pipeline_schedule_variable' do
         put api("/projects/#{project.id}/pipeline_schedules/#{pipeline_schedule.id}/variables/#{pipeline_schedule_variable.key}", developer),
-          params: { value: 'updated_value' }
+          params: { value: 'updated_value', variable_type: 'file' }
 
         expect(response).to have_gitlab_http_status(:ok)
         expect(response).to match_response_schema('pipeline_schedule_variable')
         expect(json_response['value']).to eq('updated_value')
+        expect(json_response['variable_type']).to eq('file')
       end
     end
 

spec/requests/api/pipelines_spec.rb

@@ -294,6 +294,7 @@ describe API::Pipelines do
 
         expect(variable.key).to eq(expected_variable['key'])
         expect(variable.value).to eq(expected_variable['value'])
+        expect(variable.variable_type).to eq(expected_variable['variable_type'])
       end
     end
 
@@ -314,7 +315,7 @@ describe API::Pipelines do
         end
 
         context 'variables given' do
-          let(:variables) { [{ 'key' => 'UPLOAD_TO_S3', 'value' => 'true' }] }
+          let(:variables) { [{ 'variable_type' => 'file', 'key' => 'UPLOAD_TO_S3', 'value' => 'true' }] }
 
           it 'creates and returns a new pipeline using the given variables' do
             expect do
@@ -330,7 +331,7 @@ describe API::Pipelines do
         end
 
         describe 'using variables conditions' do
-          let(:variables) { [{ 'key' => 'STAGING', 'value' => 'true' }] }
+          let(:variables) { [{ 'variable_type' => 'env_var', 'key' => 'STAGING', 'value' => 'true' }] }
 
           before do
             config = YAML.dump(test: { script: 'test', only: { variables: ['$STAGING'] } })
@@ -467,7 +468,7 @@ describe API::Pipelines do
           subject
 
           expect(response).to have_gitlab_http_status(200)
-          expect(json_response).to contain_exactly({ "key" => "foo", "value" => "bar" })
+          expect(json_response).to contain_exactly({ "variable_type" => "env_var", "key" => "foo", "value" => "bar" })
         end
       end
     end
@@ -488,7 +489,7 @@ describe API::Pipelines do
           subject
 
           expect(response).to have_gitlab_http_status(200)
-          expect(json_response).to contain_exactly({ "key" => "foo", "value" => "bar" })
+          expect(json_response).to contain_exactly({ "variable_type" => "env_var", "key" => "foo", "value" => "bar" })
         end
       end
 

spec/requests/api/variables_spec.rb

@@ -43,6 +43,7 @@ describe API::Variables do
         expect(response).to have_gitlab_http_status(200)
         expect(json_response['value']).to eq(variable.value)
         expect(json_response['protected']).to eq(variable.protected?)
+        expect(json_response['variable_type']).to eq('env_var')
       end
 
       it 'responds with 404 Not Found if requesting non-existing variable' do
@@ -80,17 +81,19 @@ describe API::Variables do
         expect(json_response['key']).to eq('TEST_VARIABLE_2')
         expect(json_response['value']).to eq('PROTECTED_VALUE_2')
         expect(json_response['protected']).to be_truthy
+        expect(json_response['variable_type']).to eq('env_var')
       end
 
       it 'creates variable with optional attributes' do
         expect do
-          post api("/projects/#{project.id}/variables", user), params: { key: 'TEST_VARIABLE_2', value: 'VALUE_2' }
+          post api("/projects/#{project.id}/variables", user), params: { variable_type: 'file',  key: 'TEST_VARIABLE_2', value: 'VALUE_2' }
         end.to change {project.variables.count}.by(1)
 
         expect(response).to have_gitlab_http_status(201)
         expect(json_response['key']).to eq('TEST_VARIABLE_2')
         expect(json_response['value']).to eq('VALUE_2')
         expect(json_response['protected']).to be_falsey
+        expect(json_response['variable_type']).to eq('file')
       end
 
       it 'does not allow to duplicate variable key' do
@@ -125,7 +128,7 @@ describe API::Variables do
         initial_variable = project.variables.reload.first
         value_before = initial_variable.value
 
-        put api("/projects/#{project.id}/variables/#{variable.key}", user), params: { value: 'VALUE_1_UP', protected: true }
+        put api("/projects/#{project.id}/variables/#{variable.key}", user), params: { variable_type: 'file', value: 'VALUE_1_UP', protected: true }
 
         updated_variable = project.variables.reload.first
 
@@ -133,6 +136,7 @@ describe API::Variables do
         expect(value_before).to eq(variable.value)
         expect(updated_variable.value).to eq('VALUE_1_UP')
         expect(updated_variable).to be_protected
+        expect(updated_variable.variable_type).to eq('file')
       end
 
       it 'responds with 404 Not Found if requesting non-existing variable' do

spec/support/shared_examples/controllers/variables_shared_examples.rb

@@ -120,4 +120,16 @@ shared_examples 'PATCH #update updates variables' do
       expect(response).to match_response_schema('variables')
     end
   end
+
+  context 'for variables of type file' do
+    let(:variables_attributes) do
+      [
+        new_variable_attributes.merge(variable_type: 'file')
+      ]
+    end
+
+    it 'creates new variable of type file' do
+      expect { subject }.to change { owner.variables.file.count }.by(1)
+    end
+  end
 end

spec/support/shared_examples/models/ci_variable_shared_examples.rb

+# frozen_string_literal: true
+
+shared_examples_for 'CI variable' do
+  it { is_expected.to include_module(HasVariable) }
+
+  describe "variable type" do
+    it 'defines variable types' do
+      expect(described_class.variable_types).to eq({ "env_var" => 1, "file" => 2 })
+    end
+
+    it "defaults variable type to env_var" do
+      expect(subject.variable_type).to eq("env_var")
+    end
+
+    it "supports variable type file" do
+      variable = described_class.new(variable_type: :file)
+      expect(variable).to be_file
+    end
+  end
+
+  it 'strips whitespaces when assigning key' do
+    subject.key = " SECRET "
+    expect(subject.key).to eq("SECRET")
+  end
+
+  it 'can convert to runner variable' do
+    expect(subject.to_runner_variable.keys).to include(:key, :value, :public, :file)
+  end
+end