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Detect if nix is installed (#51)

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* Add Nix installed detection

* Call nix-env --version instead
This commit is contained in:
Ana Hobden 2022-11-15 08:22:51 -08:00 committed by GitHub
parent 2dcda0a801
commit 6f64bb0092
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1 changed files with 12 additions and 0 deletions
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12
src/planner/linux/multi.rs
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@ -30,6 +30,16 @@ impl Planner for LinuxMulti {
return Err(Error::NixOs.into());
}
// For now, we don't try to repair the user's Nix install or anything special.
if let Ok(_) = tokio::process::Command::new("nix-env")
.arg("--version")
.stdin(std::process::Stdio::null())
.status()
.await
{
return Err(Error::NixExists.into());
}
Ok(InstallPlan {
planner: Box::new(self.clone()),
actions: vec![
@ -74,6 +84,8 @@ impl Into<BuiltinPlanner> for LinuxMulti {
enum Error {
#[error("NixOS already has Nix installed")]
NixOs,
#[error("`nix` is already a valid command, so it is installed")]
NixExists,
#[error("Error planning action")]
Action(
#[source]