Rake questions

Ruby
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;

On 6/3/06, Eric A. [email protected] wrote:

  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.

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
  1. 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.

3

David B. wrote:

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.

Is there a Rakefile idiom for displaying

task :default do
tee ls, “out.log”
end

Doh! Of course. Thanks.

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.