50 lines
1.9 KiB
Ruby
50 lines
1.9 KiB
Ruby
module Ci
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# This class responsible for assigning
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# proper pending build to runner on runner API request
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class RegisterBuildService
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def execute(current_runner)
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builds = Ci::Build.pending.unstarted
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builds =
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if current_runner.shared?
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builds.
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# don't run projects which have not enabled shared runners and builds
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joins(:project).where(projects: { shared_runners_enabled: true }).
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joins('LEFT JOIN project_features ON ci_builds.gl_project_id = project_features.project_id').
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# this returns builds that are ordered by number of running builds
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# we prefer projects that don't use shared runners at all
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joins("LEFT JOIN (#{running_builds_for_shared_runners.to_sql}) AS project_builds ON ci_builds.gl_project_id=project_builds.gl_project_id").
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where('project_features.builds_access_level IS NULL or project_features.builds_access_level > 0').
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order('COALESCE(project_builds.running_builds, 0) ASC', 'ci_builds.id ASC')
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else
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# do run projects which are only assigned to this runner (FIFO)
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builds.where(project: current_runner.projects.with_builds_enabled).order('created_at ASC')
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end
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build = builds.find do |build|
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current_runner.can_pick?(build)
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end
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if build
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# In case when 2 runners try to assign the same build, second runner will be declined
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# with StateMachines::InvalidTransition or StaleObjectError when doing run! or save method.
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build.runner_id = current_runner.id
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build.run!
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end
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build
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rescue StateMachines::InvalidTransition, ActiveRecord::StaleObjectError
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nil
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end
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private
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def running_builds_for_shared_runners
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Ci::Build.running.where(runner: Ci::Runner.shared).
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group(:gl_project_id).select(:gl_project_id, 'count(*) AS running_builds')
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end
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end
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end
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