I have written a simple D script that helps me rename files in a dataset to the following format: prefix_id.extension.

I am using foreach loop and std.file.rename for this purpose. After a few tests I have discovered that it deletes files. For example, 186 => 177 => 91 => etc...

I traced the problem down to foreach loop, but I still can't figure out what is wrong. Is it a side effect of foreach loop?

How can I fix this?

Here is the code:

foreach(i, file; list[0..n]) {
    // retrieve extension, oldName, newName
    immutable extension = (file.canFind(".") ? ("." ~ file.split(".")[$-1]) : "");
    immutable oldName = dir.buildPath(file);
    immutable newName = dir.buildPath(prefix ~ i.to!string ~ extension);

    writeln("extension: ", extension);
    writeln("oldName: ", oldName);
    writeln("newName: ", newName);

    oldName.rename(newName);
}

Any help is greatly appreciated.

Thanks in advance.
Ki

On Thursday, 26 August 2021 at 03:46:37 UTC, Ki Rill wrote:

I found the error. It is name clashing; overrides files with existing names.