Allow installing Nix without editing `/etc/bashrc` or `/etc/zshrc` · NixOS/nix#12134

2025-01-03T09:56:25.000Z

## Platform - [ ] Linux: - [x] macOS - [ ] WSL ## Additional information I use fish so those changes don't affect me anyway, and I don't like unnecessary changes to system files. ## Checklist - [x] checked [latest Nix manual] \([source]) - [x] checked [open installer issues and pull requests] for possible duplicates --- Add :+1: to [issues you find important](https://github.com/NixOS/nix/issues?q=is%3Aissue+is%3Aopen+sort%3Areactions-%2B1-desc).

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good first issueidea approvedinstaller

説明

Platform

Linux:
macOS
WSL

Additional information

I use fish so those changes don't affect me anyway, and I don't like unnecessary changes to system files.

Checklist

checked [latest Nix manual] ([source])
checked [open installer issues and pull requests] for possible duplicates

Add :+1: to issues you find important.

コントリビューターガイド

技術スタック: cppshell
領域: devops
Issue 種別: feature
難度: 3
推定時間: 1-2 days
活動状況: fresh
明確さ: clear
前提条件: basic shell scriptingunderstanding of Nix installer scripts
初心者向け度: 70
調査方針: Examine the Nix installer script (likely `scripts/install nix.sh` or `install.in`) to locate where `/etc/bashrc` and `/etc/zshrc` are modified. Look for existing environment variables or flags controlling such modifications. The goal is to introduce a new flag (e.g., ` no mods`) that skips writing to those system files. The implementation should check for the flag before each file modification and skip accordingly.