From 3111c2f58c9ea2002ed4cf92540a61bfcb8322f2 Mon Sep 17 00:00:00 2001
From: Douwe Maan <douwe@selenight.nl>
Date: Thu, 12 Oct 2017 15:35:41 +0200
Subject: [PATCH] Migrate user private tokens to personal access tokens

---
 ...tication_token_to_personal_access_token.rb | 78 +++++++++++++++++++
 ...ion_token_to_personal_access_token_spec.rb | 25 ++++++
 2 files changed, 103 insertions(+)
 create mode 100644 db/migrate/20171012125712_migrate_user_authentication_token_to_personal_access_token.rb
 create mode 100644 spec/migrations/migrate_user_authentication_token_to_personal_access_token_spec.rb

diff --git a/db/migrate/20171012125712_migrate_user_authentication_token_to_personal_access_token.rb b/db/migrate/20171012125712_migrate_user_authentication_token_to_personal_access_token.rb
new file mode 100644
index 00000000000..9a909644a44
--- /dev/null
+++ b/db/migrate/20171012125712_migrate_user_authentication_token_to_personal_access_token.rb
@@ -0,0 +1,78 @@
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class MigrateUserAuthenticationTokenToPersonalAccessToken < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = false
+
+  # disable_ddl_transaction!
+
+  TOKEN_NAME = 'Private Token'.freeze
+
+  def up
+    execute <<~SQL
+      INSERT INTO personal_access_tokens (user_id, token, name, created_at, updated_at, scopes)
+      SELECT id, authentication_token, '#{TOKEN_NAME}', NOW(), NOW(), '#{%w[api].to_yaml}'
+      FROM users
+      WHERE authentication_token IS NOT NULL
+      AND admin = FALSE
+      AND NOT EXISTS (
+        SELECT true
+        FROM personal_access_tokens
+        WHERE user_id = users.id
+        AND token = users.authentication_token
+      )
+    SQL
+
+    # Admins also need the `sudo` scope
+    execute <<~SQL
+      INSERT INTO personal_access_tokens (user_id, token, name, created_at, updated_at, scopes)
+      SELECT id, authentication_token, '#{TOKEN_NAME}', NOW(), NOW(), '#{%w[api sudo].to_yaml}'
+      FROM users
+      WHERE authentication_token IS NOT NULL
+      AND admin = TRUE
+      AND NOT EXISTS (
+        SELECT true
+        FROM personal_access_tokens
+        WHERE user_id = users.id
+        AND token = users.authentication_token
+      )
+    SQL
+  end
+
+  def down
+    if Gitlab::Database.postgresql?
+      execute <<~SQL
+        UPDATE users
+        SET authentication_token = pats.token
+        FROM (
+          SELECT user_id, token
+          FROM personal_access_tokens
+          WHERE name = '#{TOKEN_NAME}'
+        ) AS pats
+        WHERE id = pats.user_id
+      SQL
+    else
+      execute <<~SQL
+        UPDATE users
+        INNER JOIN personal_access_tokens AS pats
+        ON users.id = pats.user_id
+        SET authentication_token = pats.token
+        WHERE pats.name = '#{TOKEN_NAME}'
+      SQL
+    end
+
+    execute <<~SQL
+      DELETE FROM personal_access_tokens
+      WHERE name = '#{TOKEN_NAME}'
+      AND EXISTS (
+        SELECT true
+        FROM users
+        WHERE id = personal_access_tokens.user_id
+        AND authentication_token = personal_access_tokens.token
+      )
+    SQL
+  end
+end
diff --git a/spec/migrations/migrate_user_authentication_token_to_personal_access_token_spec.rb b/spec/migrations/migrate_user_authentication_token_to_personal_access_token_spec.rb
new file mode 100644
index 00000000000..b4834705011
--- /dev/null
+++ b/spec/migrations/migrate_user_authentication_token_to_personal_access_token_spec.rb
@@ -0,0 +1,25 @@
+require 'spec_helper'
+require Rails.root.join('db', 'migrate', '20171012125712_migrate_user_authentication_token_to_personal_access_token.rb')
+
+describe MigrateUserAuthenticationTokenToPersonalAccessToken, :migration do
+  let(:users) { table(:users) }
+  let(:personal_access_tokens) { table(:personal_access_tokens) }
+
+  let!(:user) { users.create!(id: 1, email: 'user@example.com', authentication_token: 'user-token', admin: false) }
+  let!(:admin) { users.create!(id: 2, email: 'admin@example.com', authentication_token: 'admin-token', admin: true) }
+
+  it 'migrates private tokens to Personal Access Tokens' do
+    migrate!
+
+    expect(personal_access_tokens.count).to eq(2)
+
+    user_token = personal_access_tokens.find_by(user_id: user.id)
+    admin_token = personal_access_tokens.find_by(user_id: admin.id)
+
+    expect(user_token.token).to eq('user-token')
+    expect(admin_token.token).to eq('admin-token')
+
+    expect(user_token.scopes).to eq(%w[api].to_yaml)
+    expect(admin_token.scopes).to eq(%w[api sudo].to_yaml)
+  end
+end