• solidstate1991 (61/61) Mar 04 2017 My graphics engine contains two subpackages currently:
• solidstate1991 (3/3) Mar 04 2017 Replaced all the ~> with ==, now I'm getting error from dub
• Mike Parker (28/43) Mar 04 2017 I don't see anything in your config that jumps out at me as a
• Samwise (20/21) Mar 07 2017 I was getting the same problem and created on issue on this

solidstate1991 <laszloszeremi outlook.com> writes:

My graphics engine contains two subpackages currently:

-PixelPerfectEngine (the engine itself)

-PixelPerfectEditor (the editor/converter, uses the engine itself 
to display screen data)

However, after I wrote the dub.json and try to compile it as a 
test, I get this output:

Building package pixelperfectengine in 
G:\Developing\PixelPerfectEngine\
Performing "debug" build using dmd for x86.
pixelperfectengine ~master: building configuration "library"...
source\PixelPerfectEditor\app.d(15,8): Error: module sdl is in 
file 'derelict\sdl2\sdl.d' which cannot be read
import path[0] = source
import path[1] = C:\D\dmd2\windows\bin\..\..\src\phobos
import path[2] = C:\D\dmd2\windows\bin\..\..\src\druntime\import
dmd failed with exit code 1.

Here's the json file:

{
	
	"name": "pixelperfectengine",
	
	"authors": [
		"Laszlo Szeremi"
	],
	
	"description": "A 2D game engine for retro styled games",

	"copyright": "Copyright 2015-2017 by Laszlo Szeremi under Boost 
license",

	"license": "Boost",
	"subPackages": [
	{
		"name": "pixelperfectengine",
		"sourcePath": "source/pixelperfectengine",
		"importPath": "source",
		"targetpath": "lib",
		"dependencies":
			{
		
			"derelict-sdl2": "~>2.1.0",

			"derelict-util": "~>2.1.0"
	
			},

	},
	{
		"name": "pixelperfecteditor",
		"sourcePath": "source/pixelperfecteditor",
		"importPath": "source",
		"targetpath": "bin/pixelperfecteditor",
		"dependencies":
			{
			"pixelperfectengine:pixelperfectengine": "*",
			"derelict-sdl2": "~>2.1.0",

			"derelict-util": "~>2.1.0"
,
			"derelict-fi": "~>3.0.0-alpha.1"
			},
	}
	],
}

The dependencies compile by themselves (as I don't like to use 
dub because of things like this), I don't know what's the problem.

solidstate1991 <laszloszeremi outlook.com> writes:

Replaced all the ~> with ==, now I'm getting error from dub 
wanting to use the alpha versions of the derelict libraries, 
which have minor compatibility issues with my project.

Mike Parker <aldacron gmail.com> writes:

On Saturday, 4 March 2017 at 21:14:23 UTC, solidstate1991 wrote:

 However, after I wrote the dub.json and try to compile it as a 
 test, I get this output:

I don't see anything in your config that jumps out at me as a 
potential cause of your problem (though, see below). Do you have 
the project in a git repository somewhere so I can troubleshoot?


 			{
 			"pixelperfectengine:pixelperfectengine": "*",
 			"derelict-sdl2": "~>2.1.0",

 			"derelict-util": "~>2.1.0"
 ,
 			"derelict-fi": "~>3.0.0-alpha.1"
 			},
 	}
 	],
 }

Two things, neither of which (probably) is going to cure your 
problem:

- You don't need the derelict-util dependency. All of the 
derelict packages are configured to use it. That's how dub works 
-- each package defines its own dependencies so you don't have to 
worry about them. Besides which, all of the derelict packages are 
configured to use derelict-util 2.0.x, not 2.1. Leave it out and 
dub will pull in the appropriate version.

- Don't mix the alpha versions of any of the Derelict packages 
with any of the non-alpha versions. I realize this isn't 
documented anywhere yet, but all of the alpha versions require 
derelict-util 3.0 alpha, which is binary incompatible with 
earlier versions of derelict-util. You should be using ~>2.0.3 
for derelict-fi. When all of the alpha versions are finally 
finished, I'll document which versions are compatible.

 The dependencies compile by themselves (as I don't like to use 
 dub because of things like > this), I don't know what's the 
 problem.

Don't let things like this turn you off of dub. It's an excellent 
tool. I was reluctant to use it at first because such tools had 
come and gone in the D community before. But once I did, I never 
looked back. I rarely have issues with it and when I do it's 
almost always because of user error.

One thing you might try is to delete the dub.selections.json that 
was created in your project directory (and the .dub directory for 
good measure), update the dependencies as I said above, and try 
again.

Samwise <mggmugginsmc gmail.com> writes:

On Sunday, 5 March 2017 at 01:54:22 UTC, Mike Parker wrote:
 ...

I was getting the same problem and created on issue on this 
project's repository 
(https://github.com/ZILtoid1991/pixelperfectengine), which I 
think (although I don't know) was the reason this thread was 
created. Using the dub.json that I added in that PR will compile. 
However, since I didn't actually write any code, I doubt that if 
I imported anything from pixelperfect that it would still work. 
This is an issue I saw somewhere else...

Anyway, building "pixelperfectengine:pixelperfectengine": "*" 
works with the hello world app.d, although like I said, probably 
will not if I try to import anything from pixelperfect. Building 
"pixelperfectengine": "~>0.9.1-rc2" does not work, it still gives 
me the linker error from the top of this thread.

I like dub too. It has worked well for me and seems to be much 
lighter and less of a mess than at least some IDE's. Right now I 
finished fixing the d-struct package for the atom text editor, 
which adds dub support for that, so I don't have to use the 
command line hardly at all :P. In any case, dub is a great tool, 
and works well most of the time.