fix fetch files list issue on windows

[masato25]

Fix fetch files list issue on Windows.

sorry for the wrong pull request many times. :(

[repeatedly]

Could you remove () like above if condition?

[repeatedly]

@nurse Could you check this approach? Is this good or does Ruby have proper way?

[nurse]

@masato25 What issue do you want to solve? Could you show an example case?

[masato25]

HI @nurse , nice to talk with you.
I had tried the tail plugin to watch bunch of files in a folder on Windows OS.
ex. C:\test*.csv
But it's seems doesn't works. so I look into the source code of tail plugin.

         paths += Dir.glob(path).select { |p|
            if File.readable?(p)
              true
            else
              log.warn "#{p} unreadable. It is excluded and would be examined next time."
              false
            end
          }

and I checked Ruby Doc, the document mention

\
Escapes the next metacharacter.

Note that this means you cannot use backslash on windows as part of a glob, i.e. Dir["c:\foo*"] will not work, use Dir["c:/foo*"] instead.

I followed the doc's solutions to change "c:\test*.csv" into "c:/test/*.csv" and that is works.

I just think If fluentd can native support for automatic fixed this kind of problem will be more friendly for Winodws users, so I did this pull request.

Thanks
Masato

[nurse]

It sounds reasonable.
You can use Fluent.windows? instead of (path =~ /^\s*[C-Z]:\\/) as the begining of the file, and tr!('', '/') instead of gsub. The code should be in def configure.

[nurse]

As wrote in #919 (comment), it breaks if there's a file which has glob meta character.