How can I create a Standalone Bundle Portable file application using Dlang?

[evilrat]

On Tuesday, 19 January 2021 at 11:10:25 UTC, Marcone wrote:
> On Tuesday, 19 January 2021 at 06:25:31 UTC, Imperatorn wrote:
>> On Monday, 18 January 2021 at 19:42:22 UTC, Marcone wrote:
>>> How can I create a Standalone Bundle Portable file 
>>> application using Dlang?
>>
>> Could you describe what you mean with "Bundle portable file 
>> application"?
>
> All dependencies inside an exe file. Like Python Pyinstaller.

One possible way is to use import() operator to embed file into 
resulting artifact, then write it to disk in main or module ctor 
and load as usual.
note however you need to tell compiler about file lookup path (-J 
flag) or use dub string import path respectively.

   // compile time
   enum myEmbeddedFile = import("path/to/file");

   // pseudocode
   void main()
   {
     // write file at runtime
     write(cast(ubyte[]) myEmbeddedFile, "./myfile.ext");

     // or use directly from memory
     writeln(myEmbeddedFile)
   }

this however not possible with implicit dynamic linking, though 
you still can use this approach if you do use LoadLibrary/dlopen 
yourself.