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.

4 files changed, 7 insertions, 1 deletions

diff --git a/lib/api/entities.rb b/lib/api/entities.rb
index a228614f684..90ed24a2ded 100644
--- a/lib/api/entities.rb
+++ b/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
 
diff --git a/lib/api/group_variables.rb b/lib/api/group_variables.rb
index 3f048e0dc56..47fcbabb4d4 100644
--- a/lib/api/group_variables.rb
+++ b/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
diff --git a/lib/api/pipeline_schedules.rb b/lib/api/pipeline_schedules.rb
index c86b50d3736..1d1ef1afc6b 100644
--- a/lib/api/pipeline_schedules.rb
+++ b/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
diff --git a/lib/api/variables.rb b/lib/api/variables.rb
index 3489ba827e4..a1bb21b3a06 100644
--- a/lib/api/variables.rb
+++ b/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'