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289 lines
9.0 KiB
Markdown
289 lines
9.0 KiB
Markdown
---
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title: User's Guide for Vim in Nixpkgs
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author: Marc Weber
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date: 2016-06-25
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---
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# Vim
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Both Neovim and Vim can be configured to include your favorite plugins
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and additional libraries.
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Loading can be deferred; see examples.
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At the moment we support three different methods for managing plugins:
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- Vim packages (*recommend*)
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- VAM (=vim-addon-manager)
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- Pathogen
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- vim-plug
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## Custom configuration
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Adding custom .vimrc lines can be done using the following code:
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```nix
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vim_configurable.customize {
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# `name` specifies the name of the executable and package
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name = "vim-with-plugins";
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vimrcConfig.customRC = ''
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set hidden
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'';
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}
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```
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This configuration is used when Vim is invoked with the command specified as name, in this case `vim-with-plugins`.
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For Neovim the `configure` argument can be overridden to achieve the same:
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```nix
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neovim.override {
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configure = {
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customRC = ''
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# here your custom configuration goes!
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'';
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};
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}
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```
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If you want to use `neovim-qt` as a graphical editor, you can configure it by overriding Neovim in an overlay
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or passing it an overridden Neovimn:
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```nix
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neovim-qt.override {
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neovim = neovim.override {
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configure = {
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customRC = ''
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# your custom configuration
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'';
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};
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};
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}
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```
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## Managing plugins with Vim packages
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To store you plugins in Vim packages (the native Vim plugin manager, see `:help packages`) the following example can be used:
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```nix
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vim_configurable.customize {
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vimrcConfig.packages.myVimPackage = with pkgs.vimPlugins; {
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# loaded on launch
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start = [ youcompleteme fugitive ];
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# manually loadable by calling `:packadd $plugin-name`
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# however, if a Vim plugin has a dependency that is not explicitly listed in
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# opt that dependency will always be added to start to avoid confusion.
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opt = [ phpCompletion elm-vim ];
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# To automatically load a plugin when opening a filetype, add vimrc lines like:
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# autocmd FileType php :packadd phpCompletion
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};
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}
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```
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`myVimPackage` is an arbitrary name for the generated package. You can choose any name you like.
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For Neovim the syntax is:
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```nix
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neovim.override {
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configure = {
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customRC = ''
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# here your custom configuration goes!
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'';
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packages.myVimPackage = with pkgs.vimPlugins; {
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# see examples below how to use custom packages
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start = [ ];
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# If a Vim plugin has a dependency that is not explicitly listed in
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# opt that dependency will always be added to start to avoid confusion.
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opt = [ ];
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};
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};
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}
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```
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The resulting package can be added to `packageOverrides` in `~/.nixpkgs/config.nix` to make it installable:
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```nix
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{
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packageOverrides = pkgs: with pkgs; {
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myVim = vim_configurable.customize {
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# `name` specifies the name of the executable and package
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name = "vim-with-plugins";
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# add here code from the example section
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};
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myNeovim = neovim.override {
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configure = {
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# add here code from the example section
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};
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};
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};
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}
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```
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After that you can install your special grafted `myVim` or `myNeovim` packages.
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## Managing plugins with vim-plug
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To use [vim-plug](https://github.com/junegunn/vim-plug) to manage your Vim
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plugins the following example can be used:
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```nix
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vim_configurable.customize {
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vimrcConfig.packages.myVimPackage = with pkgs.vimPlugins; {
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# loaded on launch
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plug.plugins = [ youcompleteme fugitive phpCompletion elm-vim ];
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};
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}
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```
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For Neovim the syntax is:
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```nix
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neovim.override {
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configure = {
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customRC = ''
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# here your custom configuration goes!
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'';
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plug.plugins = with pkgs.vimPlugins; [
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vim-go
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];
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};
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}
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```
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## Managing plugins with VAM
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### Handling dependencies of Vim plugins
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VAM introduced .json files supporting dependencies without versioning
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assuming that "using latest version" is ok most of the time.
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### Example
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First create a vim-scripts file having one plugin name per line. Example:
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```
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"tlib"
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{'name': 'vim-addon-sql'}
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{'filetype_regex': '\%(vim)$', 'names': ['reload', 'vim-dev-plugin']}
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```
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Such vim-scripts file can be read by VAM as well like this:
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```vim
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call vam#Scripts(expand('~/.vim-scripts'), {})
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```
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Create a default.nix file:
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```nix
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{ nixpkgs ? import <nixpkgs> {}, compiler ? "ghc7102" }:
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nixpkgs.vim_configurable.customize { name = "vim"; vimrcConfig.vam.pluginDictionaries = [ "vim-addon-vim2nix" ]; }
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```
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Create a generate.vim file:
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```vim
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ActivateAddons vim-addon-vim2nix
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let vim_scripts = "vim-scripts"
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call nix#ExportPluginsForNix({
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\ 'path_to_nixpkgs': eval('{"'.substitute(substitute(substitute($NIX_PATH, ':', ',', 'g'), '=',':', 'g'), '\([:,]\)', '"\1"',"g").'"}')["nixpkgs"],
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\ 'cache_file': '/tmp/vim2nix-cache',
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\ 'try_catch': 0,
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\ 'plugin_dictionaries': ["vim-addon-manager"]+map(readfile(vim_scripts), 'eval(v:val)')
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\ })
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```
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Then run
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```bash
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nix-shell -p vimUtils.vim_with_vim2nix --command "vim -c 'source generate.vim'"
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```
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You should get a Vim buffer with the nix derivations (output1) and vam.pluginDictionaries (output2).
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You can add your Vim to your system's configuration file like this and start it by "vim-my":
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```
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my-vim =
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let plugins = let inherit (vimUtils) buildVimPluginFrom2Nix; in {
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copy paste output1 here
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}; in vim_configurable.customize {
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name = "vim-my";
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vimrcConfig.vam.knownPlugins = plugins; # optional
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vimrcConfig.vam.pluginDictionaries = [
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copy paste output2 here
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];
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# Pathogen would be
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# vimrcConfig.pathogen.knownPlugins = plugins; # plugins
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# vimrcConfig.pathogen.pluginNames = ["tlib"];
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};
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```
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Sample output1:
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```
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"reload" = buildVimPluginFrom2Nix { # created by nix#NixDerivation
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name = "reload";
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src = fetchgit {
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url = "git://github.com/xolox/vim-reload";
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rev = "0a601a668727f5b675cb1ddc19f6861f3f7ab9e1";
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sha256 = "0vb832l9yxj919f5hfg6qj6bn9ni57gnjd3bj7zpq7d4iv2s4wdh";
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};
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dependencies = ["nim-misc"];
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};
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[...]
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```
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Sample output2:
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```nix
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[
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''vim-addon-manager''
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''tlib''
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{ "name" = ''vim-addon-sql''; }
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{ "filetype_regex" = ''\%(vim)$$''; "names" = [ ''reload'' ''vim-dev-plugin'' ]; }
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]
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```
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## Adding new plugins to nixpkgs
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Nix expressions for Vim plugins are stored in [pkgs/misc/vim-plugins](/pkgs/misc/vim-plugins). For the vast majority of plugins, Nix expressions are automatically generated by running [`./update.py`](/pkgs/misc/vim-plugins/update.py). This creates a [generated.nix](/pkgs/misc/vim-plugins/generated.nix) file based on the plugins listed in [vim-plugin-names](/pkgs/misc/vim-plugins/vim-plugin-names). Plugins are listed in alphabetical order in `vim-plugin-names` using the format `[github username]/[repository]`. For example https://github.com/scrooloose/nerdtree becomes `scrooloose/nerdtree`.
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Some plugins require overrides in order to function properly. Overrides are placed in [overrides.nix](/pkgs/misc/vim-plugins/overrides.nix). Overrides are most often required when a plugin requires some dependencies, or extra steps are required during the build process. For example `deoplete-fish` requires both `deoplete-nvim` and `vim-fish`, and so the following override was added:
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```
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deoplete-fish = super.deoplete-fish.overrideAttrs(old: {
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dependencies = with super; [ deoplete-nvim vim-fish ];
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});
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```
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Sometimes plugins require an override that must be changed when the plugin is updated. This can cause issues when Vim plugins are auto-updated but the associated override isn't updated. For these plugins, the override should be written so that it specifies all information required to install the plugin, and running `./update.py` doesn't change the derivation for the plugin. Manually updating the override is required to update these types of plugins. An example of such a plugin is `LanguageClient-neovim`.
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To add a new plugin, run `./update.py --add "[owner]/[name]"`. **NOTE**: This script automatically commits to your git repository. Be sure to check out a fresh branch before running.
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Finally, there are some plugins that are also packaged in nodePackages because they have Javascript-related build steps, such as running webpack. Those plugins are not listed in `vim-plugin-names` or managed by `update.py` at all, and are included separately in `overrides.nix`. Currently, all these plugins are related to the `coc.nvim` ecosystem of Language Server Protocol integration with vim/neovim.
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## Updating plugins in nixpkgs
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Run the update script with a GitHub API token that has at least `public_repo` access. Running the script without the token is likely to result in rate-limiting (429 errors). For steps on creating an API token, please refer to [GitHub's token documentation](https://docs.github.com/en/free-pro-team@latest/github/authenticating-to-github/creating-a-personal-access-token).
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```sh
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GITHUB_API_TOKEN=my_token ./pkgs/misc/vim-plugins/update.py
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```
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Alternatively, set the number of processes to a lower count to avoid rate-limiting.
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```sh
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./pkgs/misc/vim-plugins/update.py --proc 1
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```
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## Important repositories
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- [vim-pi](https://bitbucket.org/vimcommunity/vim-pi) is a plugin repository
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from VAM plugin manager meant to be used by others as well used by
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- [vim2nix](https://github.com/MarcWeber/vim-addon-vim2nix) which generates the
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.nix code
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