89 lines
2.3 KiB
Ruby
89 lines
2.3 KiB
Ruby
class Middleman::Extensions::ExternalPipeline < ::Middleman::Extension
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self.supports_multiple_instances = true
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option :name, nil, 'The name of the pipeline', required: true
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option :command, nil, 'The command to initialize', required: true
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option :source, nil, 'Path to merge into sitemap', required: true
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option :latency, 0.25, 'Latency between refreshes of source'
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option :disable_background_execution, false, "Don't run the command in a separate background thread"
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def initialize(app, config={}, &block)
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super
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return if app.mode?(:config)
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require 'servolux'
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require 'thread'
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require 'fileutils'
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source_path = File.expand_path(options[:source], app.root)
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# Make sure it exists, or `listen` will explode.
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::FileUtils.mkdir_p(source_path)
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@watcher = app.files.watch :source,
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path: source_path,
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latency: options[:latency],
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frontmatter: false
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@current_thread = nil
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app.reload(&method(:reload!))
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logger.info "== Executing: `#{options[:command]}`"
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if app.build? || options[:disable_background_execution]
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watch_command!(false)
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@watcher.poll_once!
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else
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watch_command!(true)
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end
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end
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def reload!
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if @current_thread
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logger.info "== Stopping: `#{options[:command]}`"
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@current_thread.stop
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@current_thread = nil
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end
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end
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def watch_command!(async)
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@current_thread = ::Servolux::Child.new(
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command: options[:command],
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suspend: 2
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)
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@current_thread.start
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watch_thread = Thread.new do
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while buf = @current_thread.io.gets
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without_newline = buf.sub(/\n$/, '')
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logger.info "== External: #{without_newline}" unless without_newline.empty?
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end
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@current_thread.wait
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if !@current_thread.exitstatus.nil? && @current_thread.exitstatus != 0
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logger.error '== External: Command failed with non-zero exit status'
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exit(1)
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end
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end
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watch_thread.join unless async
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rescue ::Errno::ENOENT => e
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logger.error "== External: Command failed with message: #{e.message}"
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exit(1)
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end
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private
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def print_command(stdout)
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while buf = stdout.gets
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without_newline = buf.sub(/\n$/, '')
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logger.info "== External: #{without_newline}" unless without_newline.empty?
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end
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end
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end
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