nixpkgs-suyu/doc/builders/packages/cataclysm-dda.section.md
Jan Tojnar 6ecc641d08
doc: prepare for commonmark
We are still using Pandoc’s Markdown parser, which differs from CommonMark spec slightly.

Notably:
- Line breaks in lists behave differently.
- Admonitions do not support the simpler syntax https://github.com/jgm/commonmark-hs/issues/75
- The auto_identifiers uses a different algorithm – I made the previous ones explicit.
- Languages (classes) of code blocks cannot contain whitespace so we have to use “pycon” alias instead of Python “console” as GitHub’s linguist

While at it, I also fixed the following issues:
- ShellSesssion was used
- Removed some pointless docbook tags.
2021-06-07 06:34:59 +02:00

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# Cataclysm: Dark Days Ahead {#cataclysm-dark-days-ahead}
## How to install Cataclysm DDA {#how-to-install-cataclysm-dda}
To install the latest stable release of Cataclysm DDA to your profile, execute
`nix-env -f "<nixpkgs>" -iA cataclysm-dda`. For the curses build (build
without tiles), install `cataclysmDDA.stable.curses`. Note: `cataclysm-dda` is
an alias to `cataclysmDDA.stable.tiles`.
If you like access to a development build of your favorite git revision,
override `cataclysm-dda-git` (or `cataclysmDDA.git.curses` if you like curses
build):
```nix
cataclysm-dda-git.override {
version = "YYYY-MM-DD";
rev = "YOUR_FAVORITE_REVISION";
sha256 = "CHECKSUM_OF_THE_REVISION";
}
```
The sha256 checksum can be obtained by
```sh
nix-prefetch-url --unpack "https://github.com/CleverRaven/Cataclysm-DDA/archive/${YOUR_FAVORITE_REVISION}.tar.gz"
```
The default configuration directory is `~/.cataclysm-dda`. If you prefer
`$XDG_CONFIG_HOME/cataclysm-dda`, override the derivation:
```nix
cataclysm-dda.override {
useXdgDir = true;
}
```
## Important note for overriding packages {#important-note-for-overriding-packages}
After applying `overrideAttrs`, you need to fix `passthru.pkgs` and
`passthru.withMods` attributes either manually or by using `attachPkgs`:
```nix
let
# You enabled parallel building.
myCDDA = cataclysm-dda-git.overrideAttrs (_: {
enableParallelBuilding = true;
});
# Unfortunately, this refers to the package before overriding and
# parallel building is still disabled.
badExample = myCDDA.withMods (_: []);
inherit (cataclysmDDA) attachPkgs pkgs wrapCDDA;
# You can fix it by hand
goodExample1 = myCDDA.overrideAttrs (old: {
passthru = old.passthru // {
pkgs = pkgs.override { build = goodExample1; };
withMods = wrapCDDA goodExample1;
};
});
# or by using a helper function `attachPkgs`.
goodExample2 = attachPkgs pkgs myCDDA;
in
# badExample # parallel building disabled
# goodExample1.withMods (_: []) # parallel building enabled
goodExample2.withMods (_: []) # parallel building enabled
```
## Customizing with mods {#customizing-with-mods}
To install Cataclysm DDA with mods of your choice, you can use `withMods`
attribute:
```nix
cataclysm-dda.withMods (mods: with mods; [
tileset.UndeadPeople
])
```
All mods, soundpacks, and tilesets available in nixpkgs are found in
`cataclysmDDA.pkgs`.
Here is an example to modify existing mods and/or add more mods not available
in nixpkgs:
```nix
let
customMods = self: super: lib.recursiveUpdate super {
# Modify existing mod
tileset.UndeadPeople = super.tileset.UndeadPeople.overrideAttrs (old: {
# If you like to apply a patch to the tileset for example
patches = [ ./path/to/your.patch ];
});
# Add another mod
mod.Awesome = cataclysmDDA.buildMod {
modName = "Awesome";
version = "0.x";
src = fetchFromGitHub {
owner = "Someone";
repo = "AwesomeMod";
rev = "...";
sha256 = "...";
};
# Path to be installed in the unpacked source (default: ".")
modRoot = "contents/under/this/path/will/be/installed";
};
# Add another soundpack
soundpack.Fantastic = cataclysmDDA.buildSoundPack {
# ditto
};
# Add another tileset
tileset.SuperDuper = cataclysmDDA.buildTileSet {
# ditto
};
};
in
cataclysm-dda.withMods (mods: with mods.extend customMods; [
tileset.UndeadPeople
mod.Awesome
soundpack.Fantastic
tileset.SuperDuper
])
```