How can you send `revision` to Appsignal from a Phoenix app?

Phoenix Forum Questions / Help
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1

With Appsignal, you can use deploy markers to flag when a bug happened in the git timeline.

In my appsignal.exs file I have:

use Mix.Config

config :appsignal, :config,
  otp_app: :my_app,
  name: "my_app",
  push_api_key: "my_key",
  env: Mix.env(),
  revision: System.get_env("RENDER_GIT_COMMIT")

However I don’t think it’s pulling the right value during compilation using mix release.

Does anyone have experience with this?

2

I’m using that setting on a project of mine and it works fine – though not using render for that one.

3

Interesting, do you mind pasting your appsignal.exs file here to compare? I also tried changing to import Config at the top of the file and it doesn’t seem to grab the revision flag.

4

It looks the same as the code you posted besides a different system env variable name.

5

Very weird… I wonder if the ENV var is just not there.

6

This worked fine:

import Config

config :appsignal, :config,
  otp_app: :my_app,
  name: "my_app",
  push_api_key: "my_key",
  env: Mix.env(),
  revision: "jan-10-2023-test"

I wonder why the ENV value isn’t being loaded in properly…

7

I got it to work.

For posterity, I delete the appsignal.exs file that Appsignal recommends.

Instead I put the appsignal configuration in runtime.exs where I know System.get_env works fine.

if config_env() == :prod do
  config :appsignal, :config,
    otp_app: :my_app,
    name: "my_app",
    push_api_key: "my_key",
    env: :prod,
    revision: System.get_env("RENDER_GIT_COMMIT")

And now I can see the deploy marker.

image

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