Set dynamic environment URLs after a job finished via dotenv

This commit adds support for `artifacts:report:dotenv`

Minor text changes

app/models/ci/job_artifact.rb

@@ -28,7 +28,8 @@ module Ci
       license_scanning: 'gl-license-scanning-report.json',
       performance: 'performance.json',
       metrics: 'metrics.txt',
-      lsif: 'lsif.json'
+      lsif: 'lsif.json',
+      dotenv: '.env'
     }.freeze
 
     INTERNAL_TYPES = {
@@ -43,6 +44,7 @@ module Ci
       metrics_referee: :gzip,
       network_referee: :gzip,
       lsif: :gzip,
+      dotenv: :gzip,
 
       # All these file formats use `raw` as we need to store them uncompressed
       # for Frontend to fetch the files and do analysis
@@ -118,7 +120,8 @@ module Ci
       metrics: 12, ## EE-specific
       metrics_referee: 13, ## runner referees
       network_referee: 14, ## runner referees
-      lsif: 15 # LSIF data for code navigation
+      lsif: 15, # LSIF data for code navigation
+      dotenv: 16
     }
 
     enum file_format: {

app/models/ci/job_variable.rb

@@ -4,11 +4,14 @@ module Ci
   class JobVariable < ApplicationRecord
     extend Gitlab::Ci::Model
     include NewHasVariable
+    include BulkInsertSafe
 
     belongs_to :job, class_name: "Ci::Build", foreign_key: :job_id
 
     alias_attribute :secret_value, :value
 
-    validates :key, uniqueness: { scope: :job_id }
+    validates :key, uniqueness: { scope: :job_id }, unless: :dotenv_source?
+
+    enum source: { internal: 0, dotenv: 1 }, _suffix: true
   end
 end

app/services/ci/create_job_artifacts_service.rb

@@ -10,10 +10,24 @@ module Ci
     ].freeze
 
     def execute(job, artifacts_file, params, metadata_file: nil)
+      return success if sha256_matches_existing_artifact?(job, params['artifact_type'], artifacts_file)
+
+      artifact, artifact_metadata = build_artifact(job, artifacts_file, params, metadata_file)
+      result = parse_artifact(job, artifact)
+
+      return result unless result[:status] == :success
+
+      persist_artifact(job, artifact, artifact_metadata)
+    end
+
+    private
+
+    def build_artifact(job, artifacts_file, params, metadata_file)
       expire_in = params['expire_in'] ||
         Gitlab::CurrentSettings.current_application_settings.default_artifacts_expire_in
 
-      job.job_artifacts.build(
+      artifact = Ci::JobArtifact.new(
+        job_id: job.id,
         project: job.project,
         file: artifacts_file,
         file_type: params['artifact_type'],
@@ -21,34 +35,51 @@ module Ci
         file_sha256: artifacts_file.sha256,
         expire_in: expire_in)
 
-      if metadata_file
-        job.job_artifacts.build(
-          project: job.project,
-          file: metadata_file,
-          file_type: :metadata,
-          file_format: :gzip,
-          file_sha256: metadata_file.sha256,
-          expire_in: expire_in)
+      artifact_metadata = if metadata_file
+                            Ci::JobArtifact.new(
+                              job_id: job.id,
+                              project: job.project,
+                              file: metadata_file,
+                              file_type: :metadata,
+                              file_format: :gzip,
+                              file_sha256: metadata_file.sha256,
+                              expire_in: expire_in)
+                          end
+
+      [artifact, artifact_metadata]
+    end
+
+    def parse_artifact(job, artifact)
+      unless Feature.enabled?(:ci_synchronous_artifact_parsing, job.project, default_enabled: true)
+        return success
       end
 
-      if job.update(artifacts_expire_in: expire_in)
-        success
-      else
-        error(job.errors.messages, :bad_request)
+      case artifact.file_type
+      when 'dotenv' then parse_dotenv_artifact(job, artifact)
+      else success
       end
+    end
 
-    rescue ActiveRecord::RecordNotUnique => error
-      return success if sha256_matches_existing_artifact?(job, params['artifact_type'], artifacts_file)
+    def persist_artifact(job, artifact, artifact_metadata)
+      Ci::JobArtifact.transaction do
+        artifact.save!
+        artifact_metadata&.save!
+
+        # NOTE: The `artifacts_expire_at` column is already deprecated and to be removed in the near future.
+        job.update_column(:artifacts_expire_at, artifact.expire_at)
+      end
 
+      success
+    rescue ActiveRecord::RecordNotUnique => error
       track_exception(error, job, params)
       error('another artifact of the same type already exists', :bad_request)
     rescue *OBJECT_STORAGE_ERRORS => error
       track_exception(error, job, params)
       error(error.message, :service_unavailable)
+    rescue => error
+      error(error.message, :bad_request)
     end
 
-    private
-
     def sha256_matches_existing_artifact?(job, artifact_type, artifacts_file)
       existing_artifact = job.job_artifacts.find_by_file_type(artifact_type)
       return false unless existing_artifact
@@ -63,5 +94,9 @@ module Ci
         uploading_type: params['artifact_type']
       )
     end
+
+    def parse_dotenv_artifact(job, artifact)
+      Ci::ParseDotenvArtifactService.new(job.project, current_user).execute(artifact)
+    end
   end
 end

app/services/ci/parse_dotenv_artifact_service.rb

+# frozen_string_literal: true
+
+module Ci
+  class ParseDotenvArtifactService < ::BaseService
+    MAX_ACCEPTABLE_DOTENV_SIZE = 5.kilobytes
+    MAX_ACCEPTABLE_VARIABLES_COUNT = 10
+
+    SizeLimitError = Class.new(StandardError)
+    ParserError = Class.new(StandardError)
+
+    def execute(artifact)
+      validate!(artifact)
+
+      variables = parse!(artifact)
+      Ci::JobVariable.bulk_insert!(variables)
+
+      success
+    rescue SizeLimitError, ParserError, ActiveRecord::RecordInvalid => error
+      Gitlab::ErrorTracking.track_exception(error, job_id: artifact.job_id)
+      error(error.message, :bad_request)
+    end
+
+    private
+
+    def validate!(artifact)
+      unless artifact&.dotenv?
+        raise ArgumentError, 'Artifact is not dotenv file type'
+      end
+
+      unless artifact.file.size < MAX_ACCEPTABLE_DOTENV_SIZE
+        raise SizeLimitError,
+          "Dotenv Artifact Too Big. Maximum Allowable Size: #{MAX_ACCEPTABLE_DOTENV_SIZE}"
+      end
+    end
+
+    def parse!(artifact)
+      variables = []
+
+      artifact.each_blob do |blob|
+        blob.each_line do |line|
+          key, value = scan_line!(line)
+
+          variables << Ci::JobVariable.new(job_id: artifact.job_id,
+            source: :dotenv, key: key, value: value)
+        end
+      end
+
+      if variables.size > MAX_ACCEPTABLE_VARIABLES_COUNT
+        raise SizeLimitError,
+          "Dotenv files cannot have more than #{MAX_ACCEPTABLE_VARIABLES_COUNT} variables"
+      end
+
+      variables
+    end
+
+    def scan_line!(line)
+      result = line.scan(/^(.*)=(.*)$/).last
+
+      raise ParserError, 'Invalid Format' if result.nil?
+
+      result.each(&:strip!)
+    end
+  end
+end

changelogs/unreleased/dotenv-report-artifact.yml

+---
+title: Support DotEnv Variables through report type artifact
+merge_request: 26247
+author:
+type: added

db/migrate/20200310145304_add_runtime_created_to_ci_job_variables.rb

+# frozen_string_literal: true
+
+class AddRuntimeCreatedToCiJobVariables < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  DEFAULT_SOURCE = 0 # Equvalent to Ci::JobVariable.internal_source
+
+  def up
+    add_column_with_default(:ci_job_variables, :source, :integer, limit: 2, default: DEFAULT_SOURCE, allow_null: false)
+  end
+
+  def down
+    remove_column(:ci_job_variables, :source)
+  end
+end

db/schema.rb

@@ -780,6 +780,7 @@ ActiveRecord::Schema.define(version: 2020_03_12_163407) do
     t.string "encrypted_value_iv"
     t.bigint "job_id", null: false
     t.integer "variable_type", limit: 2, default: 1, null: false
+    t.integer "source", limit: 2, default: 0, null: false
     t.index ["job_id"], name: "index_ci_job_variables_on_job_id"
     t.index ["key", "job_id"], name: "index_ci_job_variables_on_key_and_job_id", unique: true
   end

doc/ci/environments.md

@@ -156,6 +156,70 @@ Starting with GitLab 9.3, the environment URL is exposed to the Runner via
 - `.gitlab-ci.yml`.
 - The external URL from the environment if not defined in `.gitlab-ci.yml`.
 
+#### Set dynamic environment URLs after a job finishes
+
+> [Introduced](https://gitlab.com/gitlab-org/gitlab/issues/17066) in GitLab 12.9.
+
+In a job script, you can specify a static [environment URL](#using-the-environment-url).
+However, there may be times when you want a dynamic URL. For example,
+if you deploy a Review App to an external hosting
+service that generates a random URL per deployment, like `https://94dd65b.amazonaws.com/qa-lambda-1234567`,
+you don't know the URL before the deployment script finishes.
+If you want to use the environment URL in GitLab, you would have to update it manually.
+
+To address this problem, you can configure a deployment job to report back a set of
+variables, including the URL that was dynamically-generated by the external service.
+GitLab supports [dotenv](https://github.com/bkeepers/dotenv) file as the format,
+and expands the `environment:url` value with variables defined in the dotenv file.
+
+To use this feature, specify the
+[`artifacts:reports:dotenv`](yaml/README.md#artifactsreportsdotenv) keyword in `.gitlab-ci.yml`.
+
+##### Example of setting dynamic environment URLs
+
+The following example shows a Review App that creates a new environment
+per merge request. The `review` job is triggered by every push, and
+creates or updates an environment named `review/your-branch-name`.
+The environment URL is set to `$DYNAMIC_ENVIRONMENT_URL`:
+
+```yaml
+review:
+  script:
+    - DYNAMIC_ENVIRONMENT_URL=$(deploy-script)                                 # In script, get the environment URL.
+    - echo "DYNAMIC_ENVIRONMENT_URL=$DYNAMIC_ENVIRONMENT_URL" >> deploy.env    # Add the value to a dotenv file.
+  artifacts:
+    reports:
+      dotenv: deploy.env                                                       # Report back dotenv file to rails.
+  environment:
+    name: review/$CI_COMMIT_REF_SLUG
+    url: $DYNAMIC_ENVIRONMENT_URL                                              # and set the variable produced in script to `environment:url`
+    on_stop: stop_review
+
+stop_review:
+  script:
+    - ./teardown-environment
+  when: manual
+  environment:
+    name: review/$CI_COMMIT_REF_SLUG
+    action: stop
+```
+
+As soon as the `review` job finishes, GitLab updates the `review/your-branch-name`
+environment's URL.
+It parses the report artifact `deploy.env`, registers a list of variables as runtime-created,
+uses it for expanding `environment:url: $DYNAMIC_ENVIRONMENT_URL` and sets it to the environment URL.
+You can also specify a static part of the URL at `environment:url:`, such as
+`https://$DYNAMIC_ENVIRONMENT_URL`. If the value of `DYNAMIC_ENVIRONMENT_URL` is
+`123.awesome.com`, the final result will be `https://123.awesome.com`.
+
+The assigned URL for the `review/your-branch-name` environment is visible in the UI.
+[See where the environment URL is displayed](#using-the-environment-url).
+
+> **Notes:**
+>
+> - `stop_review` doesn't generate a dotenv report artifact, so it won't recognize the `DYNAMIC_ENVIRONMENT_URL` variable. Therefore you should not set `environment:url:` in the `stop_review` job.
+> - If the environment URL is not valid (for example, the URL is malformed), the system doesn't update the environment URL.
+
 ### Configuring manual deployments
 
 Adding `when: manual` to an automatically executed job's configuration converts it to

doc/ci/yaml/README.md

@@ -2264,6 +2264,25 @@ concatenated into a single file. Use a filename pattern (`junit: rspec-*.xml`),
 an array of filenames (`junit: [rspec-1.xml, rspec-2.xml, rspec-3.xml]`), or a
 combination thereof (`junit: [rspec.xml, test-results/TEST-*.xml]`).
 
+##### `artifacts:reports:dotenv`
+
+> [Introduced](https://gitlab.com/gitlab-org/gitlab/issues/17066) in GitLab 12.9. Requires GitLab Runner 11.5 and later.
+
+The `dotenv` report collects a set of environment variables as artifacts.
+
+The collected variables are registered as runtime-created variables of the job,
+which is useful to [set dynamic environment URLs after a job finishes](../environments.md#set-dynamic-environment-urls-after-a-job-finishes).
+It is not available for download through the web interface.
+
+There are a couple of limitations on top of the [original dotenv rules](https://github.com/motdotla/dotenv#rules).
+
+- The variable key can contain only letters, digits and underscore ('_').
+- The size of dotenv file must be smaller than 5 kilobytes.
+- The number of variables must be less than 10.
+- It doesn't support variable substitution in the dotenv file itself.
+- It doesn't support empty lines and comments (`#`) in dotenv file.
+- It doesn't support quote escape, spaces in a quote, a new line expansion in a quote, in dotenv file.
+
 ##### `artifacts:reports:codequality` **(STARTER)**
 
 > Introduced in GitLab 11.5. Requires GitLab Runner 11.5 and above.

lib/gitlab/ci/config/entry/reports.rb

@@ -11,7 +11,10 @@ module Gitlab
           include ::Gitlab::Config::Entry::Validatable
           include ::Gitlab::Config::Entry::Attributable
 
-          ALLOWED_KEYS = %i[junit codequality sast dependency_scanning container_scanning dast performance license_management license_scanning metrics lsif].freeze
+          ALLOWED_KEYS =
+            %i[junit codequality sast dependency_scanning container_scanning
+               dast performance license_management license_scanning metrics lsif
+               dotenv].freeze
 
           attributes ALLOWED_KEYS
 
@@ -31,6 +34,7 @@ module Gitlab
               validates :license_scanning, array_of_strings_or_string: true
               validates :metrics, array_of_strings_or_string: true
               validates :lsif, array_of_strings_or_string: true
+              validates :dotenv, array_of_strings_or_string: true
             end
           end
 

spec/factories/ci/job_artifacts.rb

@@ -149,6 +149,16 @@ FactoryBot.define do
       end
     end
 
+    trait :dotenv do
+      file_type { :dotenv }
+      file_format { :gzip }
+
+      after(:build) do |artifact, evaluator|
+        artifact.file = fixture_file_upload(
+          Rails.root.join('spec/fixtures/build.env.gz'), 'application/x-gzip')
+      end
+    end
+
     trait :correct_checksum do
       after(:build) do |artifact, evaluator|
         artifact.file_sha256 = Digest::SHA256.file(artifact.file.path).hexdigest

spec/factories/ci/job_variables.rb

@@ -6,5 +6,9 @@ FactoryBot.define do
     value { 'VARIABLE_VALUE' }
 
     job factory: :ci_build
+
+    trait :dotenv_source do
+      source { :dotenv }
+    end
   end
 end

spec/lib/gitlab/ci/config/entry/reports_spec.rb

@@ -44,6 +44,7 @@ describe Gitlab::Ci::Config::Entry::Reports do
         :license_scanning | 'gl-license-scanning-report.json'
         :performance | 'performance.json'
         :lsif | 'lsif.json'
+        :dotenv | 'build.dotenv'
       end
 
       with_them do

spec/requests/api/runner_spec.rb

@@ -1937,6 +1937,49 @@ describe API::Runner, :clean_gitlab_redis_shared_state do
               end
             end
           end
+
+          context 'when artifact_type is dotenv' do
+            context 'when artifact_format is gzip' do
+              let(:file_upload) { fixture_file_upload('spec/fixtures/build.env.gz') }
+              let(:params) { { artifact_type: :dotenv, artifact_format: :gzip } }
+
+              it 'stores dotenv file' do
+                upload_artifacts(file_upload, headers_with_token, params)
+
+                expect(response).to have_gitlab_http_status(:created)
+                expect(job.reload.job_artifacts_dotenv).not_to be_nil
+              end
+
+              it 'parses dotenv file' do
+                expect do
+                  upload_artifacts(file_upload, headers_with_token, params)
+                end.to change { job.job_variables.count }.from(0).to(2)
+              end
+
+              context 'when parse error happens' do
+                let(:file_upload) { fixture_file_upload('spec/fixtures/ci_build_artifacts_metadata.gz') }
+
+                it 'returns an error' do
+                  upload_artifacts(file_upload, headers_with_token, params)
+
+                  expect(response).to have_gitlab_http_status(:bad_request)
+                  expect(json_response['message']).to eq('Invalid Format')
+                end
+              end
+            end
+
+            context 'when artifact_format is raw' do
+              let(:file_upload) { fixture_file_upload('spec/fixtures/build.env.gz') }
+              let(:params) { { artifact_type: :dotenv, artifact_format: :raw } }
+
+              it 'returns an error' do
+                upload_artifacts(file_upload, headers_with_token, params)
+
+                expect(response).to have_gitlab_http_status(:bad_request)
+                expect(job.reload.job_artifacts_dotenv).to be_nil
+              end
+            end
+          end
         end
 
         context 'when artifacts already exist for the job' do

spec/services/ci/create_job_artifacts_service_spec.rb

@@ -121,6 +121,42 @@ describe Ci::CreateJobArtifactsService do
       end
     end
 
+    context 'when artifact type is dotenv' do
+      let(:artifacts_file) do
+        file_to_upload('spec/fixtures/build.env.gz', sha256: artifacts_sha256)
+      end
+
+      let(:params) do
+        {
+          'artifact_type' => 'dotenv',
+          'artifact_format' => 'gzip'
+        }
+      end
+
+      it 'calls parse service' do
+        expect_any_instance_of(Ci::ParseDotenvArtifactService) do |service|
+          expect(service).to receive(:execute).once.and_call_original
+        end
+
+        expect(subject[:status]).to eq(:success)
+        expect(job.job_variables.as_json).to contain_exactly(
+          hash_including('key' => 'KEY1', 'value' => 'VAR1', 'source' => 'dotenv'),
+          hash_including('key' => 'KEY2', 'value' => 'VAR2', 'source' => 'dotenv'))
+      end
+
+      context 'when ci_synchronous_artifact_parsing feature flag is disabled' do
+        before do
+          stub_feature_flags(ci_synchronous_artifact_parsing: false)
+        end
+
+        it 'does not call parse service' do
+          expect(Ci::ParseDotenvArtifactService).not_to receive(:new)
+
+          expect(subject[:status]).to eq(:success)
+        end
+      end
+    end
+
     shared_examples 'rescues object storage error' do |klass, message, expected_message|
       it "handles #{klass}" do
         allow_next_instance_of(JobArtifactUploader) do |uploader|

spec/services/ci/parse_dotenv_artifact_service_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Ci::ParseDotenvArtifactService do
+  let_it_be(:project) { create(:project) }
+  let_it_be(:pipeline) { create(:ci_pipeline, project: project) }
+  let(:build) { create(:ci_build, pipeline: pipeline, project: project) }
+  let(:service) { described_class.new(project, nil) }
+
+  describe '#execute' do
+    subject { service.execute(artifact) }
+
+    context 'when build has a dotenv artifact' do
+      let!(:artifact) { create(:ci_job_artifact, :dotenv, job: build) }
+
+      it 'parses the artifact' do
+        expect(subject[:status]).to eq(:success)
+
+        expect(build.job_variables.as_json).to contain_exactly(
+          hash_including('key' => 'KEY1', 'value' => 'VAR1'),
+          hash_including('key' => 'KEY2', 'value' => 'VAR2'))
+      end
+
+      context 'when parse error happens' do
+        before do
+          allow(service).to receive(:scan_line!) { raise described_class::ParserError.new('Invalid Format') }
+        end
+
+        it 'returns error' do
+          expect(Gitlab::ErrorTracking).to receive(:track_exception)
+            .with(described_class::ParserError, job_id: build.id)
+
+          expect(subject[:status]).to eq(:error)
+          expect(subject[:message]).to eq('Invalid Format')
+          expect(subject[:http_status]).to eq(:bad_request)
+        end
+      end
+
+      context 'when artifact size is too big' do
+        before do
+          allow(artifact.file).to receive(:size) { 10.kilobytes }
+        end
+
+        it 'returns error' do
+          expect(subject[:status]).to eq(:error)
+          expect(subject[:message]).to eq("Dotenv Artifact Too Big. Maximum Allowable Size: #{described_class::MAX_ACCEPTABLE_DOTENV_SIZE}")
+          expect(subject[:http_status]).to eq(:bad_request)
+        end
+      end
+
+      context 'when artifact has the specified blob' do
+        before do
+          allow(artifact).to receive(:each_blob).and_yield(blob)
+        end
+
+        context 'when a white space trails the key' do
+          let(:blob) { 'KEY1 =VAR1' }
+
+          it 'trims the trailing space' do
+            subject
+
+            expect(build.job_variables.as_json).to contain_exactly(
+              hash_including('key' => 'KEY1', 'value' => 'VAR1'))
+          end
+        end
+
+        context 'when multiple key/value pairs exist in one line' do
+          let(:blob) { 'KEY1=VAR1KEY2=VAR1' }
+
+          it 'returns error' do
+            expect(subject[:status]).to eq(:error)
+            expect(subject[:message]).to eq("Validation failed: Key can contain only letters, digits and '_'.")
+            expect(subject[:http_status]).to eq(:bad_request)
+          end
+        end
+
+        context 'when key contains UNICODE' do
+          let(:blob) { '🛹=skateboard' }
+
+          it 'returns error' do
+            expect(subject[:status]).to eq(:error)
+            expect(subject[:message]).to eq("Validation failed: Key can contain only letters, digits and '_'.")
+            expect(subject[:http_status]).to eq(:bad_request)
+          end
+        end
+
+        context 'when value contains UNICODE' do
+          let(:blob) { 'skateboard=🛹' }
+
+          it 'parses the dotenv data' do
+            subject
+
+            expect(build.job_variables.as_json).to contain_exactly(
+              hash_including('key' => 'skateboard', 'value' => '🛹'))
+          end
+        end
+
+        context 'when key contains a space' do
+          let(:blob) { 'K E Y 1=VAR1' }
+
+          it 'returns error' do
+            expect(subject[:status]).to eq(:error)
+            expect(subject[:message]).to eq("Validation failed: Key can contain only letters, digits and '_'.")
+            expect(subject[:http_status]).to eq(:bad_request)
+          end
+        end
+
+        context 'when value contains a space' do
+          let(:blob) { 'KEY1=V A R 1' }
+
+          it 'parses the dotenv data' do
+            subject
+
+            expect(build.job_variables.as_json).to contain_exactly(
+              hash_including('key' => 'KEY1', 'value' => 'V A R 1'))
+          end
+        end
+
+        context 'when value is double quoated' do
+          let(:blob) { 'KEY1="VAR1"' }
+
+          it 'parses the value as-is' do
+            subject
+
+            expect(build.job_variables.as_json).to contain_exactly(
+              hash_including('key' => 'KEY1', 'value' => '"VAR1"'))
+          end
+        end
+
+        context 'when value is single quoated' do
+          let(:blob) { "KEY1='VAR1'" }
+
+          it 'parses the value as-is' do
+            subject
+
+            expect(build.job_variables.as_json).to contain_exactly(
+              hash_including('key' => 'KEY1', 'value' => "'VAR1'"))
+          end
+        end
+
+        context 'when value has white spaces in double quote' do
+          let(:blob) { 'KEY1="  VAR1  "' }
+
+          it 'parses the value as-is' do
+            subject
+
+            expect(build.job_variables.as_json).to contain_exactly(
+              hash_including('key' => 'KEY1', 'value' => '"  VAR1  "'))
+          end
+        end
+
+        context 'when key is missing' do
+          let(:blob) { '=VAR1' }
+
+          it 'returns error' do
+            expect(subject[:status]).to eq(:error)
+            expect(subject[:message]).to match(/Key can't be blank/)
+            expect(subject[:http_status]).to eq(:bad_request)
+          end
+        end
+
+        context 'when value is missing' do
+          let(:blob) { 'KEY1=' }
+
+          it 'parses the dotenv data' do
+            subject
+
+            expect(build.job_variables.as_json).to contain_exactly(
+              hash_including('key' => 'KEY1', 'value' => ''))
+          end
+        end
+
+        context 'when it is not dotenv format' do
+          let(:blob) { "{ 'KEY1': 'VAR1' }" }
+
+          it 'returns error' do
+            expect(subject[:status]).to eq(:error)
+            expect(subject[:message]).to eq('Invalid Format')
+            expect(subject[:http_status]).to eq(:bad_request)
+          end
+        end
+
+        context 'when more than limitated variables are specified in dotenv' do
+          let(:blob) do
+            StringIO.new.tap do |s|
+              (described_class::MAX_ACCEPTABLE_VARIABLES_COUNT + 1).times do |i|
+                s << "KEY#{i}=VAR#{i}\n"
+              end
+            end.string
+          end
+
+          it 'returns error' do
+            expect(subject[:status]).to eq(:error)
+            expect(subject[:message]).to eq("Dotenv files cannot have more than #{described_class::MAX_ACCEPTABLE_VARIABLES_COUNT} variables")
+            expect(subject[:http_status]).to eq(:bad_request)
+          end
+        end
+
+        context 'when variables are cross-referenced in dotenv' do
+          let(:blob) do
+            <<~EOS
+              KEY1=VAR1
+              KEY2=${KEY1}_Test
+            EOS
+          end
+
+          it 'does not support variable expansion in dotenv parser' do
+            subject
+
+            expect(build.job_variables.as_json).to contain_exactly(
+              hash_including('key' => 'KEY1', 'value' => 'VAR1'),
+              hash_including('key' => 'KEY2', 'value' => '${KEY1}_Test'))
+          end
+        end
+
+        context 'when there is an empty line' do
+          let(:blob) do
+            <<~EOS
+              KEY1=VAR1
+
+              KEY2=VAR2
+            EOS
+          end
+
+          it 'does not support empty line in dotenv parser' do
+            subject
+
+            expect(subject[:status]).to eq(:error)
+            expect(subject[:message]).to eq('Invalid Format')
+            expect(subject[:http_status]).to eq(:bad_request)
+          end
+        end
+
+        context 'when there is a comment' do
+          let(:blob) do
+            <<~EOS
+              KEY1=VAR1         # This is variable
+            EOS
+          end
+
+          it 'does not support comment in dotenv parser' do
+            subject
+
+            expect(build.job_variables.as_json).to contain_exactly(
+              hash_including('key' => 'KEY1', 'value' => 'VAR1         # This is variable'))
+          end
+        end
+      end
+    end
+
+    context 'when build does not have a dotenv artifact' do
+      let!(:artifact) { }
+
+      it 'raises an error' do
+        expect { subject }.to raise_error(ArgumentError)
+      end
+    end
+  end
+end

spec/services/ci/retry_build_service_spec.rb

@@ -36,7 +36,7 @@ describe Ci::RetryBuildService do
        job_artifacts_performance job_artifacts_lsif
        job_artifacts_codequality job_artifacts_metrics scheduled_at
        job_variables waiting_for_resource_at job_artifacts_metrics_referee
-       job_artifacts_network_referee needs].freeze
+       job_artifacts_network_referee job_artifacts_dotenv needs].freeze
 
   IGNORE_ACCESSORS =
     %i[type lock_version target_url base_tags trace_sections

spec/services/deployments/after_create_service_spec.rb

@@ -177,6 +177,26 @@ describe Deployments::AfterCreateService do
       it { is_expected.to eq('http://review/host') }
     end
 
+    context 'when job variables are generated during runtime' do
+      let(:job) do
+        create(:ci_build,
+               :with_deployment,
+               pipeline: pipeline,
+               environment: 'review/$CI_COMMIT_REF_NAME',
+               project: project,
+               job_variables: [job_variable],
+               options: { environment: { name: 'review/$CI_COMMIT_REF_NAME', url: 'http://$DYNAMIC_ENV_URL' } })
+      end
+
+      let(:job_variable) do
+        build(:ci_job_variable, :dotenv_source, key: 'DYNAMIC_ENV_URL', value: 'abc.test.com')
+      end
+
+      it 'expands the environment URL from the dynamic variable' do
+        is_expected.to eq('http://abc.test.com')
+      end
+    end
+
     context 'when yaml environment does not have url' do
       let(:job) { create(:ci_build, :with_deployment, pipeline: pipeline, environment: 'staging', project: project) }