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----
-title: "Development environments with Nix"
-permalink: /development-environments-with-nix.html
-date: 2023-06-25T16:38:10+02:00
-layout: post
-type: note
-draft: false
-tags: [random]
----
-
-Nix is amazing for making reproducible cross OS development environment.
-
-First you need to [install Nix package
-manager](https://nixos.org/download.html).
-
-- Create a file `shell.nix` in your project folder.
-- In the section that has `python3` etc add programs you want to use. These can
-  be CLI or GUI applications. It doesn't matter to Nix.
-
-```nix
-{ pkgs ? import <nixpkgs> {} }:
-  pkgs.mkShell {
-    nativeBuildInputs = with pkgs.buildPackages; [
-          python3
-          tinycc
-        ];
-}
-```
-
-And then run it `nix-shell`. By default it will look for `shell.nix` file. If
-you want to specify a different file use `nix-shell file.nix`. That is about it.
-
-When the shell is spawned it could happen that your `PS1` prompt will be
-overwritten and your prompt will look differently. In that case you need to
-either do `NIX_SHELL_PRESERVE_PROMPT=1 nix shell` or add
-`NIX_SHELL_PRESERVE_PROMPT` variable to your `bashrc` or `zshrc` file and set it
-to `1`.
-
-I also have a modified `PS1` prompt for Bash that I use and it also catches the
-usage of Nix shell.
-
-```sh
-NIX_SHELL_PRESERVE_PROMPT=1
-
-parse_git_branch() {
-        git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/ (\1)/'
-}
-
-is_inside_nix_shell() {
-        nix_shell_name="$(basename "$IN_NIX_SHELL" 2>/dev/null)"
-        if [[ -n "$nix_shell_name" ]]; then
-                echo " \e[0;36m(nix-shell)\e[0m"
-        fi
-}
-
-export PS1="[\033[38;5;9m\]\u@\h\[$(tput sgr0)\]]$(is_inside_nix_shell)\[\033[33m\]\$(parse_git_branch)\[\033[00m\] \w\[$(tput sgr0)\] \n$ "
-```
-
-And this is what it looks like when you are in a Nix shell. Otherwise that part
-of prompt is omitted
-
-![PS1 Prompt](/assets/notes/ps1-prompt.png){:loading="lazy"}
-
-More resources:
-
-- https://nixos.wiki/wiki/Development_environment_with_nix-shell
-- https://nixos.wiki/wiki/Main_Page
-- https://itsfoss.com/why-use-nixos/
-- https://mynixos.com/