Problems with FileUtils in Rake

ruby-talk
1

Why is it that the following rakefile code works:

task :examples do
   sh %{rm -rf ~/.ruby_inline}
   ruby %{-Ilib/inline.rb -w bench/example.rb}
   sh %{rm -rf ~/.ruby_inline}
   ruby %{-Ilib/inline.rb -w bench/example2.rb}
   sh %{rm -rf ~/.ruby_inline}
   ruby %{-Ilib/inline.rb -w tutorial/example1.rb}
   sh %{rm -rf ~/.ruby_inline}
   ruby %{-Ilib/inline.rb -w tutorial/example2.rb}
end

produces valid output of:

[761 cc1@earwig ~/install/RubyInline-3.0.1]$ rake examples
(in /.autofs/home/s/c/cc1/install/RubyInline-3.0.1)
rm -rf ~/.ruby_inline
ruby -Ilib/inline.rb -w bench/example.rb
Type = Inline C , Iter = 1000000, T = 1.59424400 sec, 0.00000159 sec / iter
rm -rf ~/.ruby_inline
ruby -Ilib/inline.rb -w bench/example2.rb
hello
rm -rf ~/.ruby_inline
ruby -Ilib/inline.rb -w tutorial/example1.rb
......
rm -rf ~/.ruby_inline
ruby -Ilib/inline.rb -w tutorial/example2.rb
......

but

task :examples do
   rm_rf %{~/.ruby_inline}
   ruby %{-Ilib/inline.rb -w bench/example.rb}
   rm_rf %{~/.ruby_inline}
   ruby %{-Ilib/inline.rb -w bench/example2.rb}
   rm_rf %{~/.ruby_inline}
   ruby %{-Ilib/inline.rb -w tutorial/example1.rb}
   rm_rf %{~/.ruby_inline}
   ruby %{-Ilib/inline.rb -w tutorial/example2.rb}
end

produces:

[762 cc1@earwig ~/install/RubyInline-3.0.1]$ rake examples
(in /.autofs/home/s/c/cc1/install/RubyInline-3.0.1)
rm -rf ~/.ruby_inline
ruby -Ilib/inline.rb -w bench/example.rb
Type = Inline C , Iter = 1000000, T = 1.83316400 sec, 0.00000183 sec / iter
rm -rf ~/.ruby_inline
ruby -Ilib/inline.rb -w bench/example2.rb
bench/example2.rb:29: undefined method `hello' for #<MyTest:0x4007fa00> (NoMethodError)
rake aborted!
Command Failed: [ruby -Ilib/inline.rb -w bench/example2.rb]
../Rakefile:61

both of these tests are using:

ruby 1.8.2 (2004-06-04) [i686-linux]

My assumption is that FileUtils.rm_rf is not actually doing it's job. This is validated by the fact that ~/.ruby_inline does not appear to be correctly deleted in the second example.

So why is it FileUtils.rm_rf is not doing it's job when it should just call through to rm -rf?

Charles Comstock

2

Hi,

At Sat, 19 Jun 2004 17:38:20 +0900,
Charles Comstock wrote in [ruby-talk:104116]:

task :examples do
   rm_rf %{~/.ruby_inline}

     rm_rf File.expand_path(%{~/.ruby_inline})

FileUtils itself doesn't do tilde-expansion.

···

--
Nobu Nakada

3

Ah. Hmm. Is there a way to force it to do tilde expansion if the functionality is available? The application won't work without posix support anyway, so isn't this something we could assume? Or is that an unfair assumption? What is the preferred way to deal with this?

Charles Comstock

···

nobu.nokada@softhome.net wrote:

Hi,

At Sat, 19 Jun 2004 17:38:20 +0900,
Charles Comstock wrote in [ruby-talk:104116]:

task :examples do
  rm_rf %{~/.ruby_inline}

     rm_rf File.expand_path(%{~/.ruby_inline})

FileUtils itself doesn't do tilde-expansion.

4

Hi,

At Sat, 19 Jun 2004 19:03:20 +0900,
Charles Comstock wrote in [ruby-talk:104118]:

>>task :examples do
>> rm_rf %{~/.ruby_inline}
>
>
> rm_rf File.expand_path(%{~/.ruby_inline})
>
> FileUtils itself doesn't do tilde-expansion.
>

Ah. Hmm. Is there a way to force it to do tilde expansion if the
functionality is available? The application won't work without posix
support anyway, so isn't this something we could assume? Or is that an
unfair assumption? What is the preferred way to deal with this?

Which application do you mention about, Rake?

Including this module may work, instead of FileUtils:

  module Tilde
    module_function
    def rm_rf(*args)
      args.collect!{|n|File.expand_path(n) rescue break}
      FileUtils.rm_rf(*args)
    end
  end

···

--
Nobu Nakada