162 lines
3.6 KiB
Ruby
Executable File
162 lines
3.6 KiB
Ruby
Executable File
#!/usr/bin/env ruby
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require "base64"
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require "optparse"
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require "socket"
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usage_output = "USAGE:\n github-fast-env SCRIPT_PATH [options]"
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$options = {:verbose => false}
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OptionParser.new do |options|
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options.banner = usage_output
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options.on("-v", "--verbose", "Show verbose output") do
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$options[:verbose] = true
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end
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end.parse!
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if not ARGV or ARGV.empty?
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$stderr.puts "error: missing argument (script path)\n\n"
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$stderr.puts usage_output
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exit 1
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end
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if ARGV.length > 1
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$stderr.puts "error: only one script expected\n\n"
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$stderr.puts usage_output
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exit 1
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end
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script_path = File.realpath(ARGV[0])
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control_socket_path = "/tmp/github-fast-envd.sock"
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$control_socket = UNIXSocket.new(control_socket_path)
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def log(level, message)
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if level == "error" or $options[:verbose]
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$stderr.puts "[github-fast-env] #{level}: #{message}"
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end
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end
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def read_command(control_socket)
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ready_ios = IO.select([control_socket], [], [], 10)
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if not ready_ios
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log "error", "timeout while communicating with github-fast-envd"
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exit 1
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end
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response = control_socket.readline.strip.split(" ", 2)
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if response.empty?
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log "error", "malformed response from github-fast-envd"
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exit 1
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end
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command = response[0]
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if command == "error"
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if response.length < 2
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log "error", "malformed error response from github-fast-envd"
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exit 1
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end
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error_message = response[1]
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log "error", "#{error_message}"
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exit 1
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end
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if command == "script_error"
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if response.length < 2
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log "error", "malformed script error response from github-fast-envd"
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exit 1
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end
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error_message = Base64.decode64(response[1])
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$stderr.puts error_message
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exit 1
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end
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arguments = response[1].nil? ? [] : response[1].split(" ")
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return command, arguments
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end
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log "info", "connected to control socket"
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encoded_script_path = Base64.encode64(script_path).delete("\n")
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$control_socket.puts "new v1 #{encoded_script_path}"
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pipes = {"stdin" => nil, "stdout" => nil, "stderr" => nil}
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while true
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command, arguments = read_command($control_socket)
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if command == "ready"
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break
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end
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if not ["stdin", "stdout", "stderr"].include?(command) or arguments.empty?
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log "error", "malformed response"
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exit 1
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end
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pipe_path = arguments[0]
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log "info", "connecting to #{pipe_path}"
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if command == "stdin"
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pipes[command] = File::open(pipe_path, "w")
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else
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pipes[command] = File::open(pipe_path, "r")
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end
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pipes[command].sync = true
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log "info", "connected"
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end
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log "info", "ready"
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$control_socket.puts "ready"
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read_ios = [$control_socket, $stdin, pipes["stdout"], pipes["stderr"]]
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while read_ios.include?($control_socket) or read_ios.include?(pipes["stdout"]) or read_ios.include?(pipes["stderr"])
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log "trace", read_ios.inspect
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ready_read_ios, _, _ = IO.select(read_ios, [], [])
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log "trace", "ready read IOs: #{ready_read_ios.inspect}"
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ready_read_ios.each do |ready_read_io|
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begin
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if ready_read_io.equal? $stdin
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log "trace", "writing to stdin"
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pipes["stdin"].write ready_read_io.readpartial(4096)
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elsif ready_read_io.equal? pipes["stdout"]
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log "trace", "reading from stdout"
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$stdout.write ready_read_io.readpartial(4096)
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elsif ready_read_io.equal? pipes["stderr"]
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log "trace", "reading from stderr"
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$stderr.write ready_read_io.readpartial(4096)
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elsif ready_read_io.equal? $control_socket
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log "trace", "reading from control socket"
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command, arguments = read_command($control_socket)
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if command != "done"
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log "error", "malformed response from github-fast-envd"
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end
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else
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log "warn", "received input from unknown stream"
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end
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rescue EOFError
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log "trace", "closing stream"
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ready_read_io.close
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end
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end
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read_ios = read_ios.select {|x| not x.closed?}
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end
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