182 lines
7 KiB
Nix
182 lines
7 KiB
Nix
/* Generate JSON, XML and DocBook documentation for given NixOS options.
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Minimal example:
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{ pkgs, }:
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let
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eval = import (pkgs.path + "/nixos/lib/eval-config.nix") {
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baseModules = [
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../module.nix
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];
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modules = [];
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};
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in pkgs.nixosOptionsDoc {
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options = eval.options;
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}
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*/
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{ pkgs
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, lib
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, options
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, transformOptions ? lib.id # function for additional transformations of the options
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, documentType ? "appendix" # TODO deprecate "appendix" in favor of "none"
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# and/or rename function to moduleOptionDoc for clean slate
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# If you include more than one option list into a document, you need to
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# provide different ids.
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, variablelistId ? "configuration-variable-list"
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# String to prefix to the option XML/HTML id attributes.
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, optionIdPrefix ? "opt-"
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, revision ? "" # Specify revision for the options
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# a set of options the docs we are generating will be merged into, as if by recursiveUpdate.
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# used to split the options doc build into a static part (nixos/modules) and a dynamic part
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# (non-nixos modules imported via configuration.nix, other module sources).
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, baseOptionsJSON ? null
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# instead of printing warnings for eg options with missing descriptions (which may be lost
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# by nix build unless -L is given), emit errors instead and fail the build
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, warningsAreErrors ? true
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# allow docbook option docs if `true`. only markdown documentation is allowed when set to
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# `false`, and a different renderer may be used with different bugs and performance
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# characteristics but (hopefully) indistinguishable output.
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, allowDocBook ? true
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# whether lib.mdDoc is required for descriptions to be read as markdown.
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# !!! when this is eventually flipped to true, `lib.doRename` should also default to emitting Markdown
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, markdownByDefault ? false
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}:
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let
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rawOpts = lib.optionAttrSetToDocList options;
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transformedOpts = map transformOptions rawOpts;
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filteredOpts = lib.filter (opt: opt.visible && !opt.internal) transformedOpts;
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optionsList = lib.flip map filteredOpts
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(opt: opt
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// lib.optionalAttrs (opt ? relatedPackages && opt.relatedPackages != []) { relatedPackages = genRelatedPackages opt.relatedPackages opt.name; }
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);
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# Generate DocBook documentation for a list of packages. This is
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# what `relatedPackages` option of `mkOption` from
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# ../../../lib/options.nix influences.
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#
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# Each element of `relatedPackages` can be either
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# - a string: that will be interpreted as an attribute name from `pkgs` and turned into a link
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# to search.nixos.org,
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# - a list: that will be interpreted as an attribute path from `pkgs` and turned into a link
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# to search.nixos.org,
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# - an attrset: that can specify `name`, `path`, `comment`
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# (either of `name`, `path` is required, the rest are optional).
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#
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# NOTE: No checks against `pkgs` are made to ensure that the referenced package actually exists.
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# Such checks are not compatible with option docs caching.
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genRelatedPackages = packages: optName:
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let
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unpack = p: if lib.isString p then { name = p; }
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else if lib.isList p then { path = p; }
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else p;
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describe = args:
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let
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title = args.title or null;
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name = args.name or (lib.concatStringsSep "." args.path);
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in ''
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- [${lib.optionalString (title != null) "${title} aka "}`pkgs.${name}`](
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https://search.nixos.org/packages?show=${name}&sort=relevance&query=${name}
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)${
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lib.optionalString (args ? comment) "\n\n ${args.comment}"
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}
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'';
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in lib.concatMapStrings (p: describe (unpack p)) packages;
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optionsNix = builtins.listToAttrs (map (o: { name = o.name; value = removeAttrs o ["name" "visible" "internal"]; }) optionsList);
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in rec {
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inherit optionsNix;
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optionsAsciiDoc = pkgs.runCommand "options.adoc" {
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nativeBuildInputs = [ pkgs.nixos-render-docs ];
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} ''
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nixos-render-docs -j $NIX_BUILD_CORES options asciidoc \
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--manpage-urls ${pkgs.path + "/doc/manpage-urls.json"} \
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--revision ${lib.escapeShellArg revision} \
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${optionsJSON}/share/doc/nixos/options.json \
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$out
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'';
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optionsCommonMark = pkgs.runCommand "options.md" {
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nativeBuildInputs = [ pkgs.nixos-render-docs ];
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} ''
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nixos-render-docs -j $NIX_BUILD_CORES options commonmark \
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--manpage-urls ${pkgs.path + "/doc/manpage-urls.json"} \
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--revision ${lib.escapeShellArg revision} \
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${optionsJSON}/share/doc/nixos/options.json \
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$out
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'';
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optionsJSON = pkgs.runCommand "options.json"
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{ meta.description = "List of NixOS options in JSON format";
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nativeBuildInputs = [
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pkgs.brotli
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pkgs.python3Minimal
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];
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options = builtins.toFile "options.json"
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(builtins.unsafeDiscardStringContext (builtins.toJSON optionsNix));
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# merge with an empty set if baseOptionsJSON is null to run markdown
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# processing on the input options
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baseJSON =
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if baseOptionsJSON == null
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then builtins.toFile "base.json" "{}"
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else baseOptionsJSON;
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}
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''
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# Export list of options in different format.
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dst=$out/share/doc/nixos
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mkdir -p $dst
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TOUCH_IF_DB=$dst/.used-docbook \
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python ${./mergeJSON.py} \
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${lib.optionalString warningsAreErrors "--warnings-are-errors"} \
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${if allowDocBook then "--warn-on-docbook" else "--error-on-docbook"} \
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$baseJSON $options \
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> $dst/options.json
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brotli -9 < $dst/options.json > $dst/options.json.br
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mkdir -p $out/nix-support
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echo "file json $dst/options.json" >> $out/nix-support/hydra-build-products
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echo "file json-br $dst/options.json.br" >> $out/nix-support/hydra-build-products
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'';
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optionsUsedDocbook = pkgs.runCommand "options-used-docbook" {} ''
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if [ -e ${optionsJSON}/share/doc/nixos/.used-docbook ]; then
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echo 1
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else
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echo 0
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fi >"$out"
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'';
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optionsDocBook = pkgs.runCommand "options-docbook.xml" {
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nativeBuildInputs = [
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pkgs.nixos-render-docs
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];
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} ''
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nixos-render-docs -j $NIX_BUILD_CORES options docbook \
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--manpage-urls ${pkgs.path + "/doc/manpage-urls.json"} \
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--revision ${lib.escapeShellArg revision} \
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--document-type ${lib.escapeShellArg documentType} \
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--varlist-id ${lib.escapeShellArg variablelistId} \
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--id-prefix ${lib.escapeShellArg optionIdPrefix} \
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${lib.optionalString markdownByDefault "--markdown-by-default"} \
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${optionsJSON}/share/doc/nixos/options.json \
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options.xml
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if grep /nixpkgs/nixos/modules options.xml; then
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echo "The manual appears to depend on the location of Nixpkgs, which is bad"
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echo "since this prevents sharing via the NixOS channel. This is typically"
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echo "caused by an option default that refers to a relative path (see above"
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echo "for hints about the offending path)."
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exit 1
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fi
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${pkgs.libxslt.bin}/bin/xsltproc \
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-o "$out" ${./postprocess-option-descriptions.xsl} options.xml
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'';
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}
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