Helm Charts Package Manager MVC

What does this MR do?

First steps of Helm Charts Package Manager MVC:

1. Bootstrap:
   1. Add helm_package feature flag
   2. Add helm regexps
   3. Add helm package type
2. Model and services
   1. Create packages_helm_file_metadata table
   2. Add Packages::Helm::FileMetadatum model

Migrations

up

== 20210316171009 CreatePackagesHelmFileMetadata: migrating ===================
-- create_table(:packages_helm_file_metadata, {:id=>false})
-- quote_column_name(:channel)
   -> 0.0000s
   -> 0.0267s
-- quote_table_name("check_c34067922d")
   -> 0.0000s
-- quote_table_name(:packages_helm_file_metadata)
   -> 0.0000s
-- execute("ALTER TABLE \"packages_helm_file_metadata\"\nADD CONSTRAINT \"check_c34067922d\" CHECK (char_length(\"channel\") <= 64)\n")
   -> 0.0023s
-- add_index(:packages_helm_file_metadata, :channel)
   -> 0.0113s
== 20210316171009 CreatePackagesHelmFileMetadata: migrated (0.0501s) ==========

== 20210319071214 AddHelmMaxFileSizeToPlanLimits: migrating ===================
-- add_column(:plan_limits, :helm_max_file_size, :bigint, {:default=>1048576, :null=>false})
   -> 0.0055s
== 20210319071214 AddHelmMaxFileSizeToPlanLimits: migrated (0.0056s) ==========

down

== 20210319071214 AddHelmMaxFileSizeToPlanLimits: reverting ===================
-- remove_column(:plan_limits, :helm_max_file_size, :bigint, {:default=>1048576, :null=>false})
   -> 0.0078s
== 20210319071214 AddHelmMaxFileSizeToPlanLimits: reverted (0.0105s) ==========

== 20210316171009 CreatePackagesHelmFileMetadata: reverting ===================
-- drop_table(:packages_helm_file_metadata)
   -> 0.0075s
== 20210316171009 CreatePackagesHelmFileMetadata: reverted (0.0076s) ==========

Explain plans

with_helm_channel

Packages::PackageFile.with_helm_channel('stable')

SELECT "packages_package_files".* FROM "packages_package_files" INNER JOIN "packages_helm_file_metadata" ON "packages_helm_file_metadata"."package_file_id" = "packages_package_files"."id" WHERE "packages_helm_file_metadata"."channel" = 'stable'

https://explain.depesz.com/s/EuDV

preload_helm_file_metadata

Packages::PackageFile.preload_helm_file_metadata

SELECT "packages_package_files".* FROM "packages_package_files"
SELECT "packages_helm_file_metadata".* FROM "packages_helm_file_metadata" WHERE "packages_helm_file_metadata"."package_file_id" IN (1, 2, 3, 4, 5, 6, 7)

https://explain.depesz.com/s/aq5y

Does this MR meet the acceptance criteria?

Conformity

• 📋 Does this MR need a changelog?
  • I have included a changelog entry.
  • I have not included a changelog entry because there are no user-facing features yet.
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team