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.

5 files changed, 72 insertions, 0 deletions

diff --git a/db/migrate/20190415030217_add_variable_type_to_ci_variables.rb b/db/migrate/20190415030217_add_variable_type_to_ci_variables.rb
new file mode 100644
index 00000000000..433f510299a
--- /dev/null
+++ b/db/migrate/20190415030217_add_variable_type_to_ci_variables.rb
@@ -0,0 +1,17 @@
+# 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
diff --git a/db/migrate/20190416213556_add_variable_type_to_ci_group_variables.rb b/db/migrate/20190416213556_add_variable_type_to_ci_group_variables.rb
new file mode 100644
index 00000000000..dce73caeb5e
--- /dev/null
+++ b/db/migrate/20190416213556_add_variable_type_to_ci_group_variables.rb
@@ -0,0 +1,17 @@
+# 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
diff --git a/db/migrate/20190416213615_add_variable_type_to_ci_pipeline_variables.rb b/db/migrate/20190416213615_add_variable_type_to_ci_pipeline_variables.rb
new file mode 100644
index 00000000000..1010d9bd29e
--- /dev/null
+++ b/db/migrate/20190416213615_add_variable_type_to_ci_pipeline_variables.rb
@@ -0,0 +1,17 @@
+# 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
diff --git a/db/migrate/20190416213631_add_variable_type_to_ci_pipeline_schedule_variables.rb b/db/migrate/20190416213631_add_variable_type_to_ci_pipeline_schedule_variables.rb
new file mode 100644
index 00000000000..3079b2afd9c
--- /dev/null
+++ b/db/migrate/20190416213631_add_variable_type_to_ci_pipeline_schedule_variables.rb
@@ -0,0 +1,17 @@
+# 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
diff --git a/db/schema.rb b/db/schema.rb
index ef8cb4abf31..1bcd22dc81c 100644
--- a/db/schema.rb
+++ b/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