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nixos/doc/manual/configuration/configuration.md

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nixos/doc/manual/configuration/mattermost.chapter.md

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       # Mattermost {#sec-mattermost}

     

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       The NixOS Mattermost module lets you build [Mattermost](https://mattermost.com)

     

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       instances for collaboration over chat, optionally with custom builds of plugins

     

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       specific to your instance.

     

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       To enable Mattermost using Postgres, use a config like this:

     

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       ```nix

     

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       {

     

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         services.mattermost = {

     

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           enable = true;

     

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           # You can change this if you are reverse proxying.

     

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           host = "0.0.0.0";

     

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           port = 8065;

     

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           # Allow modifications to the config from Mattermost.

     

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           mutableConfig = true;

     

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           # Override modifications to the config with your NixOS config.

     

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           preferNixConfig = true;

     

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           socket = {

     

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             # Enable control with the `mmctl` socket.

     

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             enable = true;

     

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             # Exporting the control socket will add `mmctl` to your PATH, and export

     

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             # MMCTL_LOCAL_SOCKET_PATH systemwide. Otherwise, you can get the socket

     

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             # path out of `config.mattermost.socket.path` and set it manually.

     

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             export = true;

     

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           };

     

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           # For example, to disable auto-installation of prepackaged plugins.

     

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           settings.PluginSettings.AutomaticPrepackagedPlugins = false;

     

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         }

     

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       }

     

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       ```

     

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       As of NixOS 25.05, Mattermost uses peer authentication with Postgres or

     

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       MySQL by default. If you previously used password auth on localhost,

     

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       this will automatically be configured if your `stateVersion` is set to at least

     

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       `25.05`.

     

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       ## Using the Mattermost derivation {#sec-mattermost-derivation}

     

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       The nixpkgs `mattermost` derivation runs the entire test suite during the

     

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       `checkPhase`. This test suite is run with a live MySQL and Postgres database

     

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       instance in the sandbox. If you are building Mattermost, this can take a while,

     

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       especially if it is building on a resource-constrained system.

     

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       The following passthrus are designed to assist with enabling or disabling

     

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       the `checkPhase`:

     

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       - `mattermost.withTests`

     

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       - `mattermost.withoutTests`

     

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       The default (`mattermost`) is an alias for `mattermost.withTests`.

     

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       ## Using Mattermost plugins {#sec-mattermost-plugins}

     

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       You can configure Mattermost plugins by either using prebuilt binaries or by

     

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       building your own. We test building and using plugins in the NixOS test suite.

     

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       Mattermost plugins are tarballs containing a system-specific statically linked

     

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       Go binary and webapp resources.

     

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       Here is an example with a prebuilt plugin tarball:

     

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       ```nix

     

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       {

     

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         services.mattermost = {

     

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           plugins = with pkgs; [

     

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             /*

     

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              * todo

     

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              * 0.7.1

     

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              * https://github.com/mattermost/mattermost-plugin-todo/releases/tag/v0.7.1

     

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              */

     

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             (fetchurl {

     

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               # Note: Don't unpack the tarball; the NixOS module will repack it for you.

     

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               url = "https://github.com/mattermost-community/mattermost-plugin-todo/releases/download/v0.7.1/com.mattermost.plugin-todo-0.7.1.tar.gz";

     

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               hash = "sha256-P+Z66vqE7FRmc2kTZw9FyU5YdLLbVlcJf11QCbfeJ84=";

     

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             })

     

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           ];

     

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         };

     

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       }

     

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       ```

     

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       Once the plugin is installed and the config rebuilt, you can enable this plugin

     

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       in the System Console.

     

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       ## Building Mattermost plugins {#sec-mattermost-plugins-build}

     

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       The `mattermost` derivation includes the `buildPlugin` passthru for building

     

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       plugins that use the "standard" Mattermost plugin build template at

     

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       [mattermost-plugin-demo](https://github.com/mattermost/mattermost-plugin-demo).

     

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       Since this is a "de facto" standard for building Mattermost plugins that makes

     

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       assumptions about the build environment, the `buildPlugin` helper tries to fit

     

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       these assumptions the best it can.

     

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       Here is how to build the above Todo plugin. Note that we rely on

     

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       package-lock.json being assembled correctly, so must use a version where it is!

     

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       If there is no lockfile or the lockfile is incorrect, Nix cannot fetch NPM build

     

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       and runtime dependencies for a sandbox build.

     

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       ```nix

     

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       {

     

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         services.mattermost = {

     

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           plugins = with pkgs; [

     

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             (mattermost.buildPlugin {

     

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               pname = "mattermost-plugin-todo";

     

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               version = "0.8-pre";

     

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               src = fetchFromGitHub {

     

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                 owner = "mattermost-community";

     

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                 repo = "mattermost-plugin-todo";

     

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                 # 0.7.1 didn't work, seems to use an older set of node dependencies.

     

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                 rev = "f25dc91ea401c9f0dcd4abcebaff10eb8b9836e5";

     

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                 hash = "sha256-OM+m4rTqVtolvL5tUE8RKfclqzoe0Y38jLU60Pz7+HI=";

     

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               };

     

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               vendorHash = "sha256-5KpechSp3z/Nq713PXYruyNxveo6CwrCSKf2JaErbgg=";

     

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               npmDepsHash = "sha256-o2UOEkwb8Vx2lDWayNYgng0GXvmS6lp/ExfOq3peyMY=";

     

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               extraGoModuleAttrs = {

     

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                 npmFlags = [ "--legacy-peer-deps" ];

     

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               };

     

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             })

     

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           ];

     

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         };

     

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       }

     

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       ```

     

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       See `pkgs/by-name/ma/mattermost/build-plugin.nix` for all the options.

     

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       As in the previous example, once the plugin is installed and the config rebuilt,

     

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       you can enable this plugin in the System Console.

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nixos/doc/manual/redirects.json

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         "sec-mattermost": [

     

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           "index.html#sec-mattermost"

     

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         ],

     

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         "sec-mattermost-derivation": [

     

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           "index.html#sec-mattermost-derivation"

     

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         ],

     

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         "sec-mattermost-plugins": [

     

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           "index.html#sec-mattermost-plugins"

     

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         ],

     

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         "sec-mattermost-plugins-build": [

     

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           "index.html#sec-mattermost-plugins-build"

     

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         ],

     

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