Add initial changes for stages statuses migration

1 files changed, 76 insertions, 0 deletions

diff --git a/db/post_migrate/20170630111158_migrate_stages_statuses.rb b/db/post_migrate/20170630111158_migrate_stages_statuses.rb
new file mode 100644
index 00000000000..b4b76893595
--- /dev/null
+++ b/db/post_migrate/20170630111158_migrate_stages_statuses.rb
@@ -0,0 +1,76 @@
+class MigrateStagesStatuses < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  class Build < ActiveRecord::Base
+    self.table_name = 'ci_builds'
+
+    scope :relevant, -> do
+      where(status: %w[pending running success failed canceled skipped manual])
+    end
+
+    scope :created, -> { where(status: 'created') }
+    scope :running, -> { where(status: 'running') }
+    scope :pending, -> { where(status: 'pending') }
+    scope :success, -> { where(status: 'success') }
+    scope :failed, -> { where(status: 'failed')  }
+    scope :canceled, -> { where(status: 'canceled')  }
+    scope :skipped, -> { where(status: 'skipped')  }
+    scope :manual, -> { where(status: 'manual')  }
+
+    scope :failed_but_allowed, -> do
+      where(allow_failure: true, status: [:failed, :canceled])
+    end
+
+    scope :exclude_ignored, -> do
+      where("allow_failure = ? OR status IN (?)",
+        false, all_state_names - [:failed, :canceled, :manual])
+    end
+
+    def status_sql
+      scope_relevant = relevant.exclude_ignored
+      scope_warnings = relevant.failed_but_allowed
+
+      builds = scope_relevant.select('count(*)').to_sql
+      created = scope_relevant.created.select('count(*)').to_sql
+      success = scope_relevant.success.select('count(*)').to_sql
+      manual = scope_relevant.manual.select('count(*)').to_sql
+      pending = scope_relevant.pending.select('count(*)').to_sql
+      running = scope_relevant.running.select('count(*)').to_sql
+      skipped = scope_relevant.skipped.select('count(*)').to_sql
+      canceled = scope_relevant.canceled.select('count(*)').to_sql
+      warnings = scope_warnings.select('count(*) > 0').to_sql
+
+      "(CASE
+        WHEN (#{builds})=(#{skipped}) AND (#{warnings}) THEN 'success'
+        WHEN (#{builds})=(#{skipped}) THEN 'skipped'
+        WHEN (#{builds})=(#{success}) THEN 'success'
+        WHEN (#{builds})=(#{created}) THEN 'created'
+        WHEN (#{builds})=(#{success})+(#{skipped}) THEN 'success'
+        WHEN (#{builds})=(#{success})+(#{skipped})+(#{canceled}) THEN 'canceled'
+        WHEN (#{builds})=(#{created})+(#{skipped})+(#{pending}) THEN 'pending'
+        WHEN (#{running})+(#{pending})>0 THEN 'running'
+        WHEN (#{manual})>0 THEN 'manual'
+        WHEN (#{created})>0 THEN 'running'
+        ELSE 'failed'
+      END)"
+    end
+  end
+
+  def up
+    execute <<-SQL.strip_heredoc
+    SQL
+  end
+
+  def down
+    execute <<-SQL.strip_heredoc
+      UPDATE ci_stages SET status = null
+    SQL
+  end
+
+  private
+
+end