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https://github.com/NiklasGollenstede/nixos-installer.git
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41 lines
2.0 KiB
Bash
41 lines
2.0 KiB
Bash
#!/usr/bin/env bash
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: << '```bash'
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# Installer Script Overrides (Example)
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This is an example on how to customize the default installation process.
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The [`config.installer.commands.*`](../../modules/installer.nix.md) can be used for some per-host customization, but for further reaching changes that are supposed to affect all hosts in a configuration, it may be necessary or more appropriate to extend/override the [default installer functions](../../lib/setup-scripts/).
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This file would need to be included in the configuration like this:
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```nix
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{ config.installer.scripts.my-customizations = { path = .../installer.sh.md; order = 1500; }; }
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```
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## Implementation
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```bash
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## Replace/Extend a Command or Function
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# For example, »nixos-install-cmd $mnt $topLevel« gets called to perform the last step(s) of the installation, after the »/nix/store« contents has been copied to the new filesystems.
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# Usually it just installs the bootloader, but we can hook into the function to have it do additional stuff:
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copy-function nixos-install-cmd nixos-install-cmd-default # (if we still want to call the previous implementation)
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function nixos-install-cmd {( # 1: mnt, 2: topLevel
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# ... do things beforehand ...
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nixos-install-cmd-default "$@"
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# ... do things afterwards ...
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)}
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# This schema works with any of the existing commands or functions they use.
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## Add a New COMMAND
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# Any bash function defined in any of the setup scripts can be called as »nix run .#$hostname -- COMMAND«, but a proper COMMAND should be documented as such:
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declare-command my-thing withThese coolArguments << 'EOD'
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This does my thing with these cool arguments -- duh!
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EOD
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declare-flag my-thing laser-color COLOR "Color of the laser used for my thing."
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function my-thing { # 1: withThese, 2: coolArguments
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local withThese=$1
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local coolThings=$2
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echo "I am playing $withThese to shoot $coolArguments with ${args[laser-color]:-red} lasers!"
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}
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# $ nix run .#example -- my-thing --laser-color=powerful 'friends' -- 'nothing, cuz that would be irresponsible,'
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