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possible way to expose devshell.toml's path?聽#95
Description
Issue
I wanted to add a feature to the git.hooks module to allow specifying a path to a hook. I got all the logic wired in and working, but the issue is that I have to specify a full path 馃槥
nix doesn't seem to have the ability to convert a string with a relative path to a full path, and since toml doesn't have a native notion of a path, I'm kinda stuck. builtins.toPath is depricated and doesn't really do anything.
The only work around I can think of is if we define a variable somewhere containing the current devshell.toml's path. Then I can specify a path relative to the location of the devshell.toml to the git.hook source file. I'm sure this will come in handy for similar reasons in other modules.
I guess the alternative would be to leave it as a nix only option, but setting from toml would be ideal.
Context
my devshell.toml is not at the root of the project, otherwise I probably would have thought to use DEVSHELL_ROOT
Activity
zimbatm commentedon Feb 17, 2021
Do you want the file to be added to the /nix/store or just point to its location in the repo?
Where is that path being used?
nrdxp commentedon Feb 17, 2021
Whatever you believe would be the best solution, if indeed we find a good solution
Here is a draft pr so you can see the implementation. #96
The directory containting the devshell.toml. The pre-commit file I would like to specify is also there. The nix specific parts are in the default.nix.
blaggacao commentedon Feb 17, 2021
A couple of days ago, I also had a thought on relative-to-toml file paths in the context of wanting to load per-repo devshell modules (without resorting to
.nix)zimbatm commentedon Feb 28, 2021
The module has a _file attribute that exposes its location. Ideally, it would be possible to set the type of attribute to
types.pathand have it be resolved if it starts with./. @infinisil do you know if that would be possible?Otherwise, we will have to revert to something less ideal like a post-processing step. Or install
config.resolveRoot = builtins.dirOf filewhen the user usesimportTOMLimp: pathType resolves strings that look like relpaths to `file`