smon

smon

Is it possible to include resource files when packaging my project using Mix/escript?

Hi everyone,

I was thinking of resources like images, XML files or documents in other text formats. Is there something similar to the resources folder in Java (“src/main/resources”)? The goal would be to add files to my package that can be accessed from code on runtime.

Or is this somehow a very un-Elixir-y way of thinking? Elixir is my first functional language - so what would be the “right” way to do it?

Cheers,
smon

Marked As Solved

josevalim

josevalim

Creator of Elixir

To confirm: although priv is the appropriate place, we can’t load files from priv inside escripts. What I usually do is to load the file at compilation time and store it as a module attribute:

@external_resource "priv/foo/bar"
@bar_contents File.read! "priv/foo/bar"
def bar_contents, do: @bar_contents

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benwilson512

benwilson512

Author of Craft GraphQL APIs in Elixir with Absinthe

Hey!

That is precisely what the /priv folder is for in your project root. It’ll get packaged up along with your application when you build a release. If you have a data.xml file in your /priv directory you can get to it in your code by doing

Path.join(:code.priv_dir(:my_app), "data.xml")
13
Post #2
david

david

Erlang OTP Design Principles User’s Guide at Directory Structure

priv - Used for application specific files. For example, C executables are placed here. The function code:priv_dir/1 should be used to access this directory.

Per Jose:

“priv” is like “OTP” where its name made sense at the beginning but today it has grown beyond that. All it matters now is that we put in the “priv” directory any artifact that you need in production alongside your code.

Elixir Lang Talk - What is Priv?

smon

smon

Awesome!

Thank you very much. priv is an abbreviation of what exactly? “private”? Or am I missing some more obvious term it stands for?

Cheers,
smon

sentient-wendy

sentient-wendy

Thanks for the replies @smon and @josevalim! :grinning:

NobbZ

NobbZ

It will only affect release size. The Priv folder is only included there, not in individual modules.

Also it won’t increase module load time as it’s not included in modules as I said.

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