Hello!

I'm trying out some things in D (with tango) and tried to build a *very* primitive indexing program. One function requires to run through a directory (without recursion) and get me all the files/folders in there.

So after reading the documentation I found that tango.io.FileScan basically does what I need. It's just that I can't get it to work. All examples there use some filter, but I don't need one. And the other stuff I tried (and which compiled) gives me either a wrong number of files in my debug output, or none at all.

Here's (part of) my code:

FileScan scan = new FileScan();
// only one of those was used at a time, the others are commented
// dir is a char[] with an existing (absolute) directory:
scan(dir, "*");
scan(dir, ".*");
scan(dir, "*.*");
scan(dir, "");
scan = scan.sweep(dir, false);


FilePath[] myFolders = scan.folders();
FilePath[] myFiles = scan.files();
char[][] err = scan.errors();
Stdout("found folders: ")(myFolders.length)("\n")();
Stdout("found files  : ")(myFiles.length)("\n")();
Stdout("errors:\n")();
foreach (char[] e; err)
  Stdout(e)("\n")();


The result was always:

found folders: 0
found files  : 0
errors:
% _

I think I'm doing something very wrong here. And it's possibly because I don't understand the documentation.

Can you help me get this to work?



Regards
qwesx

I suspect there is a bug.
You could use FilePath.toList() as an alternative for now.

foreach(path; FilePath(".").toList())
{
  if(path.isFolder)
    folder_counter++;
  else
    file_counter++;
}

On Thu, 14 Oct 2010 15:31:47 +0000, qwesx wrote:

> Hello!
> 
> I'm trying out some things in D (with tango) and tried to build a *very* primitive indexing program. One function requires to run through a directory (without recursion) and get me all the files/folders in there.
> 
> So after reading the documentation I found that tango.io.FileScan basically does what I need. It's just that I can't get it to work. All examples there use some filter, but I don't need one. And the other stuff I tried (and which compiled) gives me either a wrong number of files in my debug output, or none at all.
> 
> Here's (part of) my code:
> 
> FileScan scan = new FileScan();
> // only one of those was used at a time, the others are commented // dir
> is a char[] with an existing (absolute) directory: scan(dir, "*");
> scan(dir, ".*");
> scan(dir, "*.*");
> scan(dir, "");
> scan = scan.sweep(dir, false);
> 
> 
> FilePath[] myFolders = scan.folders(); FilePath[] myFiles =
> scan.files();
> char[][] err = scan.errors();
> Stdout("found folders: ")(myFolders.length)("\n")(); Stdout("found files
>  : ")(myFiles.length)("\n")(); Stdout("errors:\n")();
> foreach (char[] e; err)
>   Stdout(e)("\n")();
> 
> 
> The result was always:
> 
> found folders: 0
> found files  : 0
> errors:
> % _
> 
> I think I'm doing something very wrong here. And it's possibly because I don't understand the documentation.
> 
> Can you help me get this to work?
> 
> 
> 
> Regards
> qwesx

Here is the bug report (patch proposal included):

http://dsource.org/projects/tango/ticket/2003

On Thu, 14 Oct 2010 15:31:47 +0000, qwesx wrote:

> Hello!
> 
> I'm trying out some things in D (with tango) and tried to build a *very* primitive indexing program. One function requires to run through a directory (without recursion) and get me all the files/folders in there.
> 
> So after reading the documentation I found that tango.io.FileScan basically does what I need. It's just that I can't get it to work. All examples there use some filter, but I don't need one. And the other stuff I tried (and which compiled) gives me either a wrong number of files in my debug output, or none at all.
> 
> Here's (part of) my code:
> 
> FileScan scan = new FileScan();
> // only one of those was used at a time, the others are commented // dir
> is a char[] with an existing (absolute) directory: scan(dir, "*");
> scan(dir, ".*");
> scan(dir, "*.*");
> scan(dir, "");
> scan = scan.sweep(dir, false);
> 
> 
> FilePath[] myFolders = scan.folders(); FilePath[] myFiles =
> scan.files();
> char[][] err = scan.errors();
> Stdout("found folders: ")(myFolders.length)("\n")(); Stdout("found files
>  : ")(myFiles.length)("\n")(); Stdout("errors:\n")();
> foreach (char[] e; err)
>   Stdout(e)("\n")();
> 
> 
> The result was always:
> 
> found folders: 0
> found files  : 0
> errors:
> % _
> 
> I think I'm doing something very wrong here. And it's possibly because I don't understand the documentation.
> 
> Can you help me get this to work?
> 
> 
> 
> Regards
> qwesx

Ok,

as I've found out, FileScan is only for locating a set of files. the preferred way is to use the virtual file system (VFS):

http://dsource.org/projects/tango/wiki/ChapterVFS

Examples: http://www.dsource.org/projects/tango/wiki/VfsZipAndLinesExample http://dsource.org/projects/tango/browser/trunk/doc/example/vfs/vfscan.d http://dsource.org/projects/tango/browser/trunk/doc/example/vfs

But I think FilePath.toList()
is enough for your plans.


On Thu, 14 Oct 2010 15:31:47 +0000, qwesx wrote:

> Hello!
> 
> I'm trying out some things in D (with tango) and tried to build a *very* primitive indexing program. One function requires to run through a directory (without recursion) and get me all the files/folders in there.
> 
> So after reading the documentation I found that tango.io.FileScan basically does what I need. It's just that I can't get it to work. All examples there use some filter, but I don't need one. And the other stuff I tried (and which compiled) gives me either a wrong number of files in my debug output, or none at all.
> 
> Here's (part of) my code:
> 
> FileScan scan = new FileScan();
> // only one of those was used at a time, the others are commented // dir
> is a char[] with an existing (absolute) directory: scan(dir, "*");
> scan(dir, ".*");
> scan(dir, "*.*");
> scan(dir, "");
> scan = scan.sweep(dir, false);
> 
> 
> FilePath[] myFolders = scan.folders(); FilePath[] myFiles =
> scan.files();
> char[][] err = scan.errors();
> Stdout("found folders: ")(myFolders.length)("\n")(); Stdout("found files
>  : ")(myFiles.length)("\n")(); Stdout("errors:\n")();
> foreach (char[] e; err)
>   Stdout(e)("\n")();
> 
> 
> The result was always:
> 
> found folders: 0
> found files  : 0
> errors:
> % _
> 
> I think I'm doing something very wrong here. And it's possibly because I don't understand the documentation.
> 
> Can you help me get this to work?
> 
> 
> 
> Regards
> qwesx

On Thu, 14 Oct 2010 18:07:20 +0000, Moritz Warning wrote:

> Ok,
> 
> as I've found out, FileScan is only for locating a set of files. the preferred way is to use the virtual file system (VFS):
> 
> http://dsource.org/projects/tango/wiki/ChapterVFS
> 
> Examples: http://www.dsource.org/projects/tango/wiki/VfsZipAndLinesExample http://dsource.org/projects/tango/browser/trunk/doc/example/vfs/vfscan.d http://dsource.org/projects/tango/browser/trunk/doc/example/vfs
> 
> But I think FilePath.toList()
> is enough for your plans.


I'll take a look at it.
Thank all three of you, I got it working with toList()
:-)


Regards
qwesx