Rake questions

ruby-talk
1

1. Is there some reason to prefer
      sh %{ls -ltr}
    over
      sh "ls -ltr"
    ?

2. My standard csh idiom for creating a log
    file is this:
        ls |& tee test.log

    But when I try that in sh, the process
    hangs, and nothing is written. truss
    shows this:
      waitid(P_PID, ...WEXITED|WTRAPPED|WNOWAIT)
      (sleeping...)

    Is there a Rakefile idiom for displaying
    execution results and also saving them
    in a file?

3. A single quote (') in a comment causes a parse
    error. Is this a known rake bug? If not,
    what's the best way to report it?

thanks
eric

2

Hi Eric,

I'm by no means a rake expert but since no-one else has answered;

1. Is there some reason to prefer
      sh %{ls -ltr}
    over
      sh "ls -ltr"
    ?

Perhaps so that you can do this;

    sh %{grep "long long" *}

without having to escape the double quotes. Just a guess.

2. My standard csh idiom for creating a log
    file is this:
        ls |& tee test.log

    But when I try that in sh, the process
    hangs, and nothing is written. truss
    shows this:
      waitid(P_PID, ...WEXITED|WTRAPPED|WNOWAIT)
      (sleeping...)

    Is there a Rakefile idiom for displaying
    execution results and also saving them
    in a file?

I'd do this;

    def tee(output, file_name)
      puts output
      File.open(file_name, "a") {|f| f << output }
    end

    task :default do
      tee `ls`, "out.log"
    end

3. A single quote (') in a comment causes a parse
    error. Is this a known rake bug? If not,
    what's the best way to report it?

I'm not sure exactly what you mean by this. Are you saying

    # this is a comment with a quote '

causes a parse error? Anyway, I'm not sure where to report bugs to
Rake but I'd probably try the devel mailing list;

    http://rubyforge.org/mailman/listinfo/rake-devel

They should at least point you in the right direction.

···

On 6/3/06, Eric Armstrong <Eric.Armstrong@sun.com> wrote:

3

David Balmain wrote:

I'm by no means a rake expert but since no-one else has answered;

1. Is there some reason to prefer
      sh %{ls -ltr}
    over
      sh "ls -ltr"
    ?

Perhaps so that you can do this;

   sh %{grep "long long" *}

without having to escape the double quotes. Just a guess.

Darn good guess, as it turns out. I was just doing something
similar using rsync in my Rakefile, and was glad I had
encoded %{...} for that very reason.

2. My standard csh idiom for creating a log
    file is this:
        ls |& tee test.log

    But when I try that in sh, the process
    hangs, and nothing is written. truss
    shows this:
      waitid(P_PID, ...WEXITED|WTRAPPED|WNOWAIT)
      (sleeping...)

    Is there a Rakefile idiom for displaying
    execution results and also saving them
    in a file?

I'd do this;

   def tee(output, file_name)
     puts output
     File.open(file_name, "a") {|f| f << output }
   end

   task :default do
     tee `ls`, "out.log"
   end

Doh! Of course. Thanks.

3. A single quote (') in a comment causes a parse
    error. Is this a known rake bug? If not,
    what's the best way to report it?

I'm not sure exactly what you mean by this. Are you saying

   # this is a comment with a quote '

causes a parse error? Anyway, I'm not sure where to report bugs to
Rake but I'd probably try the devel mailing list;

   http://rubyforge.org/mailman/listinfo/rake-devel

They should at least point you in the right direction.

Another great tip. Thanks. I was at the Rake site, but
missed that pointer somehow.

···

On 6/3/06, Eric Armstrong <Eric.Armstrong@sun.com> wrote: