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modules/docs: construct docs from docs.* options
Introduce various `docs.*` options where doc pages, menu entries, etc can be defined. The options themselves are responsible for rendering this to markdown and HTML.
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‎docs/default.nix

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@@ -88,6 +88,7 @@ let
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{
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isDocs = true;
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_module.args.pkgs = lib.mkForce noPkgs;
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docs._utils.docsPkgs = lib.mkForce pkgs;
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}
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];
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};

‎modules/default.nix

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@@ -23,4 +23,9 @@
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./performance.nix
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./plugins.nix
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];
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docs.options.options = {
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enable = true;
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optionScopes = [ ];
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};
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}

‎modules/docs/_util.nix

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{
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lib,
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config,
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pkgs,
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...
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}:
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let
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inherit (config.docs.menu)
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categories
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;
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transformOptions =
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let
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root = builtins.toString ../../.;
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mkGitHubDeclaration = user: repo: branch: subpath: {
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url = "https://github.com/${user}/${repo}/blob/${branch}/${subpath}";
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name = "<${repo}/${subpath}>";
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};
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transformDeclaration =
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decl:
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if lib.hasPrefix root (builtins.toString decl) then
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mkGitHubDeclaration "nix-community" "nixvim" "main" (
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lib.removePrefix "/" (lib.strings.removePrefix root (builtins.toString decl))
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)
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else if decl == "lib/modules.nix" then
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mkGitHubDeclaration "NixOS" "nixpkgs" "master" decl
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else
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decl;
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in
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opt: opt // { declarations = builtins.map transformDeclaration opt.declarations; };
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docsPageModule =
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{ name, config, ... }:
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{
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options = {
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enable = lib.mkOption {
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type = lib.types.bool;
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description = "Whether to enable this page/menu item.";
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default = true;
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example = false;
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};
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target = lib.mkOption {
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type = lib.types.str;
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description = ''
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The target filepath, relative to the root of the docs.
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'';
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default = lib.optionalString (name != "") (name + "/") + "index.md";
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defaultText = lib.literalMD ''
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`<name>` joined with `"index.md"`. Separated by `"/"` if `<name>` is non-empty.
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'';
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};
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source = lib.mkOption {
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type = with lib.types; nullOr path;
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description = ''
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Markdown page. Set to null to create a menu entry without a corresponding file.
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'';
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};
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menu.position = lib.mkOption {
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type = with lib.types; listOf str;
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description = "The position in the menu.";
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default =
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let
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list = lib.splitString "/" config.target;
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last = lib.last list;
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rest = lib.dropEnd 1 list;
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in
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if last == "index.md" then
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rest
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else if lib.hasSuffix ".md" last then
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rest ++ [ (lib.removeSuffix ".md" last) ]
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else
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list;
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defaultText = lib.literalMD ''
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`target`, split by `"/"`, with any trailing `"index.md` or `".md"` suffixes removed.
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'';
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};
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menu.category = lib.mkOption {
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type = lib.types.enum (builtins.attrNames categories);
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description = ''
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A category defined in `docs.menu.categories`.
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Determines the menu category, section, etc.
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'';
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};
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};
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};
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in
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{
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options.docs._utils = lib.mkOption {
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type = with lib.types; lazyAttrsOf raw;
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description = "internal utils, modules, functions, etc";
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default = { };
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internal = true;
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visible = false;
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};
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config.docs._utils = {
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# Can be overridden to an externally defined pkgs,
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# because _module.args.pkgs will be stubbed when evaling for the docs
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docsPkgs = lib.mkOptionDefault pkgs;
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# A liberal type that permits any superset of docsPageModule
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docsPageLiberalType = lib.types.submodule [
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{ _module.check = false; }
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docsPageModule
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];
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mkOptionList = lib.flip lib.pipe [
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(lib.flip builtins.removeAttrs [ "_module" ])
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lib.optionAttrSetToDocList
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(builtins.map transformOptions)
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(builtins.filter (opt: opt.visible && !opt.internal))
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# TODO: consider supporting `relatedPackages`
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# See https://github.com/NixOS/nixpkgs/blob/61235d44/lib/options.nix#L103-L104
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# and https://github.com/NixOS/nixpkgs/blob/61235d44/nixos/lib/make-options-doc/default.nix#L128-L165
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];
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inherit docsPageModule;
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};
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}

‎modules/docs/all.nix

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{
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lib,
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config,
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...
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}:
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let
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inherit (config.docs._utils)
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docsPageLiberalType
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docsPkgs
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;
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in
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{
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options.docs = {
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all = lib.mkOption {
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type = with lib.types; listOf docsPageLiberalType;
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# TODO: define docs.allSources option that this option should source pages from
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description = "All enabled doc pages defined in `pages`, `platforms`, and `optiosn`";
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apply = builtins.filter (page: page.enable);
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internal = true;
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visible = false;
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};
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src = lib.mkOption {
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type = lib.types.package;
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description = "All source files for the docs.";
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internal = true;
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visible = false;
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readOnly = true;
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};
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};
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config.docs = {
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# A directory with all the files in it
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src = docsPkgs.callPackage ./src.nix {
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pages = builtins.filter (page: page.source or null != null) config.docs.all;
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};
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};
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}

‎modules/docs/default.nix

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@@ -5,4 +5,14 @@
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default = true;
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description = "Install the man pages for NixVim options.";
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};
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imports = [
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./_util.nix
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./all.nix
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./files.nix
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./mdbook
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./menu
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./options.nix
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./platforms.nix
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];
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}

‎modules/docs/files.nix

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{
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lib,
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config,
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...
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}:
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let
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inherit (config.docs._utils)
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docsPageModule
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;
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docsPageType = lib.types.submodule (
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{
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name,
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config,
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options,
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...
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}:
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let
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derivationName = builtins.replaceStrings [ "/" ] [ "-" ] name;
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in
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{
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imports = [
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docsPageModule
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];
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options.text = lib.mkOption {
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type = with lib.types; nullOr lines;
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default = null;
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description = "Text of the file.";
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};
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config.source = lib.mkIf (config.text != null) (
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lib.mkDerivedConfig options.text (builtins.toFile derivationName)
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);
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}
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);
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user-guide = ../../docs/user-guide;
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in
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{
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options.docs = {
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files = lib.mkOption {
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type = with lib.types; lazyAttrsOf docsPageType;
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description = ''
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A set of pages to include in the docs.
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The attr name defines the filepath.
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'';
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default = { };
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internal = true;
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visible = false;
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};
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};
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config.docs = {
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files =
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{
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"" = {
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menu.category = "header";
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menu.position = [ "Home" ];
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source = ../../docs/mdbook/index.md;
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};
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}
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// lib.concatMapAttrs (
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name: type:
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let
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title = lib.removeSuffix ".md" name;
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in
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lib.optionalAttrs (type == "regular") {
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"user-guide/${title}" = {
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menu.category = "user-guide";
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# TODO: define user-facing titles to show in the menu...
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menu.position = [ title ];
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source = "${user-guide}/${name}";
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};
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}
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) (builtins.readDir user-guide);
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# Copy values into `all`
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all = builtins.attrValues config.docs.files;
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};
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}

‎modules/docs/mdbook/default.nix

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{
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lib,
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config,
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...
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}:
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let
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inherit (config.docs._utils) docsPkgs;
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defaultSettings = {
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book = {
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language = "en";
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multilingual = false;
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title = "nixvim docs";
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};
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build.create-missing = false;
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output.html.site-url = "/";
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output.html.fold = {
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enable = true;
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level = 0;
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};
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preprocessor.alerts = { };
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};
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in
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{
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options.docs.html = {
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site = lib.mkOption {
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type = lib.types.package;
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description = "HTML docs rendered by mdbook.";
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internal = true;
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visible = false;
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readOnly = true;
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};
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settings = lib.mkOption {
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type = with lib.types; attrsOf anything;
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description = ''
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Freeform settings written to `book.toml`.
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See MDBook's [Configuration](https://rust-lang.github.io/mdBook/format/configuration/index.html) docs.
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'';
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defaultText = defaultSettings;
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internal = true;
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visible = false;
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};
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};
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config.docs.html = {
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site = docsPkgs.callPackage ./package.nix {
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inherit (config.docs) src;
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inherit (config.docs.html) settings;
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menu = config.docs.menu.src;
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};
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settings = defaultSettings;
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};
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}

‎modules/docs/mdbook/package.nix

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{
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writers,
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mdbook,
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mdbook-alerts,
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runCommand,
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menu,
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src,
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settings,
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}:
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runCommand "html-docs"
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{
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inherit src;
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nativeBuildInputs = [
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mdbook
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mdbook-alerts
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];
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settings = writers.writeTOML "book.toml" settings;
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menu = builtins.toFile "menu.md" (builtins.unsafeDiscardStringContext menu);
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}
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''
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mkdir src
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for input in $src/*; do
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name=$(basename "$input")
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ln -s "$input" "src/$name"
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done
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ln -s $settings book.toml
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ln -s $menu src/SUMMARY.md
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# Build the website
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mdbook build --dest-dir $out
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''

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