nix-community/nix-direnv
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Jörg Thalheim 2020-05-11 09:20:15 +01:00
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@ -10,10 +10,26 @@ Prominent features:
shell derivation in the user's `gcroots` (Life is too short to loose your shell derivation in the user's `gcroots` (Life is too short to loose your
build cache of your project if you are in a plane without internet connection) build cache of your project if you are in a plane without internet connection)
## USAGE ## Installation via nix
```console Since 20.03 you can install nix-direnv via nix:
$ git clone https://github.com/nix-community/nix-direnv $HOME/.nix-direnv
### NixOS
In `/etc/nixos/configuration.nix`:
```
{ pkgs, ... }: {
environment.systemPackages = with pkgs; [ nix-direnv ];
# nix options for derivations to persist garbage collection
nix.extraOptions = ''
keep-outputs = true
keep-derivations = true
'';
environment.pathsToLink = [
"/share/nix-direnv"
];
}
``` ```
Then source the direnvrc from this repository in your own `.direnvrc` Then source the direnvrc from this repository in your own `.direnvrc`
@ -21,15 +37,77 @@ Then source the direnvrc from this repository in your own `.direnvrc`
```bash ```bash
# put this in ~/.direnvrc # put this in ~/.direnvrc
source $HOME/.nix-direnv/direnvrc source $HOME/.nix-direnv/direnvrc
if [ -f /run/current-system/sw/share/nix-direnv/direnvrc ]; then
source /run/current-system/sw/share/nix-direnv/direnvrc
fi
``` ```
For derivations to persist garbage collection, set the following in nix.conf: ### Home-manager
In `$HOME/.config/nixpkgs/home.nix` add
```
{ pkgs, ... }:
home.packages = with pkgs; [
nix-direnv
];
```
Then add the following lines to your direnvrc:
```
if [ -f ~/.nix-profile/share/nix-direnv/direnvrc ]; then
source ~/.nix-profile/share/nix-direnv/direnvrc
fi
```
Optional: To protect your nix-shell against garbage collection you also need to add these options to your nix configuration
If you are on NixOS also add the following lines to your `/etc/nixos/configuration.nix`:
```
{ pkgs, ... }: {
nix.extraOptions = ''
keep-outputs = true
keep-derivations = true
'';
}
```
On other systems with nix add the following configuration to your `/etc/nix/nix.conf`:
``` ```
keep-derivations = true keep-derivations = true
keep-outputs = true keep-outputs = true
``` ```
## Installation via nix-env
As **non-root** user do the following:
```console
nix-env -f '<nixpkgs>' -iA nix-direnv
```
Than follow the home-manager installation except for the `$HOME/.config/nixpkgs/home.nix` changes.
## Installation from source
Clone the repository to some directory
```console
$ git clone https://github.com/nix-community/nix-direnv $HOME/nix-direnv
```
Then source the direnvrc from this repository in your own `.direnvrc`
```bash
# put this in ~/.direnvrc
source $HOME/nix-direnv/direnvrc
```
## Storing .direnv outside the project directory ## Storing .direnv outside the project directory
`.direnv` might interact badly with backups (i.e. Dropbox) or IDEs. `.direnv` might interact badly with backups (i.e. Dropbox) or IDEs.