Update core.sh

[CohenCyril]

cache-install/src/core.sh

Line 57 in 138361d

echo "File at `nix_file` does not exist"

Using ` ` causes shell evaluation of nix_file and leads to a weird error...

This error hides a more problematic one: where does the shell variable INPUT_NIX_FILE come from?

[rikhuijzer]

The INPUT_NIX_FILE comes from a GitHub Action specific convention. The variables available to the action are set in action.yml. There, you can see that nix_file should be defined by the user. Then, GitHub Actions converts nix_file into the environment variable INPUT_NIX_FILE.

[CohenCyril]

The INPUT_NIX_FILE comes from a GitHub Action specific convention. The variables available to the action are set in action.yml. There, you can see that nix_file should be defined by the user. Then, GitHub Actions converts nix_file into the environment variable INPUT_NIX_FILE.

Thanks for this explanation!
I wonder what went wrong, because I did provide the nix_file. I will try again later a bit more carefully and report it to you with a proper example if the issue persists.

[CohenCyril]

I guess there still is a discrepancy between the this and the documentation which says the variable is not required and defaults to default.nix.

[rikhuijzer]

I guess there still is a discrepancy between the this and the documentation which says the variable is not required and defaults to default.nix.

I don't see where the discrepancy could be introduced. Maybe, you run a different version? Could you explicitly try v1.0.7?

Do you have a public repository? Then, I could take a look there.

[CohenCyril]

I guess there still is a discrepancy between the this and the documentation which says the variable is not required and defaults to default.nix.

I don't see where the discrepancy could be introduced. Maybe, you run a different version? Could you explicitly try v1.0.7?

Do you have a public repository? Then, I could take a look there.

Sure, thank you!
Here are two PR which fail, with v1.0.7 and where there is a default.nix at the root of the repo.

• Without explicit nix_file set: retry cache install math-comp/math-comp-nix#17
• With explicit nix_file set to default.nix: retry cache install with nix_file math-comp/math-comp-nix#18