diagrams-latex: configure dependencies

[Igor Moreno Santos]

Hi,

How do I configure dependencies when using diagrams-latex?

In the tutorial, it says: "If you have definitions that should be shared among multiple diagrams (as is common), simply put the definitions in a separate Haskell module in the same directory, and import this module in each diagram block".

But my code has other dependencies. I figured I could maybe try to use the cabal sandbox but that doesn't exist anymore. Any ideas?

Thank you.

Igor

[Ryan Yates]

It has been a while, but I think one of the options described in `findSandbox` should work to get it to use the correct package-db:

https://hackage.haskell.org/package/diagrams-lib-1.4.6/docs/Diagrams-Util.html#v:findSandbox

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[Igor Moreno Santos]

Hi,

I'm not sure exactly how to use `findSandbox` to do what I need. I have code that produces a diagram inside a latex file (I'm using diagrams-latex) but this code depends on some libraries so I need to set up the dependencies of the code as I would do in a cabal or stack project.

Thank you.

Igor

[Ryan Yates]

I was able to get it to work by using the `--package-env` option for `cabal install`:

```

cabal install --lib -fpgf diagrams-builder diagrams-lib diagrams-pgf --package-env=./

```

You can list any additional packages in the list.  This makes a `.ghc.environment.x86_64-linux-9.2.4` file in the current directory which `ghci` and `diagrams-builder` find when I run `pdflatex`.

Let me know if this helps,

Ryan

On Sat, May 20, 2023 at 12:41 PM Igor Moreno Santos <igorm...@gmail.com> wrote:

Hi,

I'm not sure exactly how to use `findSandbox` to do what I need. I have code that produces a diagram inside a latex file (I'm using diagrams-latex) but this code depends on some libraries so I need to set up the dependencies of the code as I would do in a cabal or stack project.

Thank you.

Igor

On Friday, May 19, 2023 at 3:47:38 AM UTC+2 Ryan Yates wrote:

It has been a while, but I think one of the options described in `findSandbox` should work to get it to use the correct package-db:

https://hackage.haskell.org/package/diagrams-lib-1.4.6/docs/Diagrams-Util.html#v:findSandbox

On Thu, May 18, 2023 at 12:03 PM Igor Moreno Santos <igorm...@gmail.com> wrote:

Hi,

How do I configure dependencies when using diagrams-latex?

In the tutorial, it says: "If you have definitions that should be shared among multiple diagrams (as is common), simply put the definitions in a separate Haskell module in the same directory, and import this module in each diagram block".

But my code has other dependencies. I figured I could maybe try to use the cabal sandbox but that doesn't exist anymore. Any ideas?

Thank you.

Igor

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[Igor Moreno Santos]

Hi,

Thank you for your help. Indeed what you suggested works for the scenario described but the situation that I have is actually a little different from what I described. I have a codebase I'm developing with stack and this code uses diagrams. I would like to call this code from the latex code. That's why I said I wanted to add other dependencies. But the problem is that cabal doesn't let me add a folder to the list like so:

```

cabal install --lib -fpgf diagrams-builder diagrams-lib diagrams-pgf FOLDER_NAME --package-env=./

```

I could go to the folder and run cabal install

```

cd FOLDER_NAME

cabal install --lib --package-env=FOLDER_WITH_LATEX_CODE

```

but now when I compiled the latex code it doesn't work because I compiled things separately. For example if in my codebase I have

```

c :: _ => QDiagram b V2 n Any

c = circle 1

```

and then in latex I have

```

...

dia = c

```

 it complains saying

 

```

  • Couldn't match expected type: QDiagram PGF V2 Double Any
                  with actual type: diagrams-core-1.5.1:Diagrams.Core.Types.QDiagram
                                      b0 linear-1.22:Linear.V2.V2 n0 Any

```

I'm stuck...

[Ryan Yates]

Hi Igor,

I tried to match your situation a little more closely and was able to build by adding a `cabal.project` file with the path to the folder with the dependency:

```

packages: my-project/

```

In `my-project/` I have `my-project.cabal` that defines a library 'MyLib'.  I can then build with:

```

cabal install --lib -fpgf diagrams-builder diagrams-lib diagrams-pgf MyLib --package-env=./

```

And due to the `cabal.project` file it knows how to resolve `MyLib`.  I could then reference that lib in the diagrams code in the LaTeX file and it would successfully build for me.

Hope this helps!

Ryan

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[Igor Moreno Santos]

Amazing! Thank you so much :-)

Igor Moreno

ᐧ