D is dead

[rikki cattermole]

On 04/09/2018 10:27 PM, Ecstatic Coder wrote:
> On Tuesday, 4 September 2018 at 09:56:13 UTC, rikki cattermole wrote:
>> On 04/09/2018 9:40 PM, Ecstatic Coder wrote:
>>> But it seems that the latest version of "std.file.copy" now 
>>> completely ignores the "PreserveAttributes.no" argument on Windows, 
>>> which made recent Windows builds of Resync fail on read-only files.
>>
>> What???
>>
>> There is nothing in the changelog between 2.080.0 and 2.082.0 for 
>> changes to std.file.
>>
>> Version from July 2017[0]. Version from 2.082.0[1]. They look the same 
>> to me.
>>
>> [0] 
>> https://github.com/dlang/phobos/blob/d8959320e0c47a1861e32bbbf6a3ba30a019798e/std/file.d#L3430 
>>
>> [1] https://github.com/dlang/phobos/blob/v2.082.0/std/file.d#L4216
> 
> Mayb I'm wrong, but what I can say is that I've recently updated DMD and 
> compiled a windows build of Resync, and that I *HAD* to make 
> Windows-specific code that removes the "read-only" attributes only on 
> Windows.
> 
> attributes = source_file_path.getAttributes();
> source_file_path.getTimes( access_time, modification_time );
> 
> version ( Windows )
> {
>      if ( target_file_path.exists() )
>      {
>          target_file_path.setAttributes( attributes & ~1 );
>      }
> 
>      source_file_path.copy( target_file_path, PreserveAttributes.no );
>      target_file_path.setAttributes( attributes & ~1 );
>      target_file_path.setTimes( access_time, modification_time );
>      target_file_path.setAttributes( attributes );
> }
> else
> {
>      if ( target_file_path.exists() )
>      {
>          target_file_path.setAttributes( 511 );
>      }
> 
>      source_file_path.copy( target_file_path, PreserveAttributes.no );
>      target_file_path.setAttributes( attributes );
>      target_file_path.setTimes( access_time, modification_time );
> }
> 
> Honestly I don't see why I have to make this ugly fix on Windows, while 
> the Linux version has always worked fine on read-only files.

Hang on a second.

assert(preserve == Yes.preserveAttributes);

Something is smelling an awful lot here.

Up to Windows 7 CopyFileW which is used for Windows didn't copy the 
attributes over[0] but it does now.

This is a bug on our end, which should include a fallback to copying 
manually the file contents over.

[0] 
https://docs.microsoft.com/en-us/windows/desktop/api/winbase/nf-winbase-copyfilew