Pipe IO objects to method calls on a logger.

The argument is a hash of IO to method symbols.

    logger.pipe(io => :the_method)

For each line read from ‘io’, logger.the_method(the_line) will be called.

Example:

    cmd = "strace -e trace=write date"
    Open4::popen4(cmd) do |pid, stdin, stdout, stderr|
      stdin.close

      # Make lines from stdout be logged as 'info'
      # Make lines from stderr be logged as 'error'
      logger.pipe(stdout => :info, stderr => :error)
    end

Output:

    write(1, "Fri Jan 11 22:49:42 PST 2013\n", 29) = 29 {"level":"error"}
    Fri Jan 11 22:49:42 PST 2013 {"level":"info"}
    +++ exited with 0 +++ {"level":"error"}

Pipe IO objects to method calls on a logger.

The argument is a hash of IO to method symbols.

    logger.pipe(io => :the_method)

For each line read from ‘io’, logger.the_method(the_line) will be called.

Example:

    cmd = "strace -e trace=write date"
    Open4::popen4(cmd) do |pid, stdin, stdout, stderr|
      stdin.close

      # Make lines from stdout be logged as 'info'
      # Make lines from stderr be logged as 'error'
      logger.pipe(stdout => :info, stderr => :error)
    end

Output:

    write(1, "Fri Jan 11 22:49:42 PST 2013\n", 29) = 29 {"level":"error"}
    Fri Jan 11 22:49:42 PST 2013 {"level":"info"}
    +++ exited with 0 +++ {"level":"error"}