133 lines
3.4 KiB
Ruby
133 lines
3.4 KiB
Ruby
![]() |
module Projects
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class UpdatePagesService < BaseService
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BLOCK_SIZE = 32.kilobytes
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MAX_SIZE = 1.terabyte
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attr_reader :build
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def initialize(project, build)
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@project, @build = project, build
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end
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def execute
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# Create status notifying the deployment of pages
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@status = create_status
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@status.run!
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raise 'missing pages artifacts' unless build.artifacts_file?
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raise 'pages are outdated' unless latest?
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# Create temporary directory in which we will extract the artifacts
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FileUtils.mkdir_p(tmp_path)
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Dir.mktmpdir(nil, tmp_path) do |archive_path|
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extract_archive!(archive_path)
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# Check if we did extract public directory
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archive_public_path = File.join(archive_path, 'public')
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raise 'pages miss the public folder' unless Dir.exists?(archive_public_path)
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raise 'pages are outdated' unless latest?
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deploy_page!(archive_public_path)
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success
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end
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rescue => e
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error(e.message)
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end
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private
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def success
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@status.success
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super
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end
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def error(message, http_status = nil)
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@status.allow_failure = !latest?
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@status.description = message
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@status.drop
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super
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end
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def create_status
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GenericCommitStatus.new(
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project: project,
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commit: build.commit,
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user: build.user,
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ref: build.ref,
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stage: 'deploy',
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name: 'pages:deploy'
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)
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end
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def extract_archive!(temp_path)
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results = Open3.pipeline(%W(gunzip -c #{artifacts}),
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%W(dd bs=#{BLOCK_SIZE} count=#{blocks}),
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%W(tar -x -C #{temp_path} public/),
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err: '/dev/null')
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raise 'pages failed to extract' unless results.compact.all?(&:success?)
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end
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def deploy_page!(archive_public_path)
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# Do atomic move of pages
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# Move and removal may not be atomic, but they are significantly faster then extracting and removal
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# 1. We move deployed public to previous public path (file removal is slow)
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# 2. We move temporary public to be deployed public
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# 3. We remove previous public path
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FileUtils.mkdir_p(pages_path)
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begin
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FileUtils.move(public_path, previous_public_path)
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rescue
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end
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FileUtils.move(archive_public_path, public_path)
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ensure
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FileUtils.rm_r(previous_public_path, force: true)
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end
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def latest?
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# check if sha for the ref is still the most recent one
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# this helps in case when multiple deployments happens
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sha == latest_sha
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end
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def blocks
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# Calculate dd parameters: we limit the size of pages
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max_size = current_application_settings.max_pages_size.megabytes
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max_size ||= MAX_SIZE
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blocks = 1 + max_size / BLOCK_SIZE
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blocks
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end
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def tmp_path
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@tmp_path ||= File.join(Settings.pages.path, 'tmp')
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end
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def pages_path
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@pages_path ||= project.pages_path
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end
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def public_path
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@public_path ||= File.join(pages_path, 'public')
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end
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def previous_public_path
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@previous_public_path ||= File.join(pages_path, "public.#{SecureRandom.hex}")
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end
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def ref
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build.ref
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end
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def artifacts
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build.artifacts_file.path
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end
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def latest_sha
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project.commit(build.ref).try(:sha).to_s
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end
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def sha
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build.sha
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end
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end
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end
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