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doc: separate manpage URLs from the Pandoc filter
Move the manpage-to-URL mapping to `doc/manpage-urls.json` so that we can reuse that file elsewhere, and generate the `link-manpages.lua` filter from that file. Also modify the Pandoc filter so that it doesn't wrap manpages that are already inside a link. Keeping a Lua filter is essential for speed: a Python filter would increase the runtime `md-to-db.sh` from ~20s to ~30s (but Python is not to blame; marshalling Pandoc types to and from JSON is a costly operation). Parsing in Lua seems tedious, so I went with the Nix way.
This commit is contained in:
Naïm Favier
parent
5a9a335334
commit
a8d4cf149c
@ -11,7 +11,7 @@ pandoc_commonmark_enabled_extensions = +attributes+fenced_divs+footnotes+bracket
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pandoc_flags = --extract-media=$(pandoc_media_dir) \
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--lua-filter=$(PANDOC_LUA_FILTERS_DIR)/diagram-generator.lua \
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--lua-filter=build-aux/pandoc-filters/myst-reader/roles.lua \
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--lua-filter=build-aux/pandoc-filters/link-unix-man-references.lua \
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--lua-filter=$(PANDOC_LINK_MANPAGES_FILTER) \
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--lua-filter=build-aux/pandoc-filters/docbook-writer/rst-roles.lua \
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--lua-filter=build-aux/pandoc-filters/docbook-writer/labelless-link-is-xref.lua \
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-f commonmark$(pandoc_commonmark_enabled_extensions)+smart
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28
doc/build-aux/pandoc-filters/link-manpages.nix
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28
doc/build-aux/pandoc-filters/link-manpages.nix
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@ -0,0 +1,28 @@
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{ pkgs ? import ../../.. {} }:
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let
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inherit (pkgs) lib;
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manpageURLs = builtins.fromJSON (builtins.readFile (pkgs.path + "/doc/manpage-urls.json"));
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in pkgs.writeText "link-manpages.lua" ''
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--[[
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Adds links to known man pages that aren't already in a link.
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]]
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local manpage_urls = {
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${lib.concatStringsSep "\n" (lib.mapAttrsToList (man: url:
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" [${builtins.toJSON man}] = ${builtins.toJSON url},") manpageURLs)}
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}
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traverse = 'topdown'
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-- Returning false as the second value aborts processing of child elements.
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function Link(elem)
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return elem, false
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end
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function Code(elem)
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local is_man_role = elem.classes:includes('interpreted-text') and elem.attributes['role'] == 'manpage'
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if is_man_role and manpage_urls[elem.text] ~= nil then
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return pandoc.Link(elem, manpage_urls[elem.text]), false
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end
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end
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''
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@ -1,38 +0,0 @@
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--[[
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Turns a manpage reference into a link, when a mapping is defined below.
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]]
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local man_urls = {
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["nix.conf(5)"] = "https://nixos.org/manual/nix/stable/#sec-conf-file",
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["journald.conf(5)"] = "https://www.freedesktop.org/software/systemd/man/journald.conf.html",
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["logind.conf(5)"] = "https://www.freedesktop.org/software/systemd/man/logind.conf.html",
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["networkd.conf(5)"] = "https://www.freedesktop.org/software/systemd/man/networkd.conf.html",
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["systemd.automount(5)"] = "https://www.freedesktop.org/software/systemd/man/systemd.automount.html",
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["systemd.exec(5)"] = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html",
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["systemd.link(5)"] = "https://www.freedesktop.org/software/systemd/man/systemd.link.html",
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["systemd.mount(5)"] = "https://www.freedesktop.org/software/systemd/man/systemd.mount.html",
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["systemd.netdev(5)"] = "https://www.freedesktop.org/software/systemd/man/systemd.netdev.html",
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["systemd.network(5)"] = "https://www.freedesktop.org/software/systemd/man/systemd.network.html",
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["systemd.nspawn(5)"] = "https://www.freedesktop.org/software/systemd/man/systemd.nspawn.html",
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["systemd.path(5)"] = "https://www.freedesktop.org/software/systemd/man/systemd.path.html",
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["systemd.resource-control(5)"] = "https://www.freedesktop.org/software/systemd/man/systemd.resource-control.html",
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["systemd.scope(5)"] = "https://www.freedesktop.org/software/systemd/man/systemd.scope.html",
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["systemd.service(5)"] = "https://www.freedesktop.org/software/systemd/man/systemd.service.html",
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["systemd.slice(5)"] = "https://www.freedesktop.org/software/systemd/man/systemd.slice.html",
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["systemd.socket(5)"] = "https://www.freedesktop.org/software/systemd/man/systemd.socket.html",
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["systemd.timer(5)"] = "https://www.freedesktop.org/software/systemd/man/systemd.timer.html",
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["systemd.unit(5)"] = "https://www.freedesktop.org/software/systemd/man/systemd.unit.html",
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["timesyncd.conf(5)"] = "https://www.freedesktop.org/software/systemd/man/timesyncd.conf.html",
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["tmpfiles.d(5)"] = "https://www.freedesktop.org/software/systemd/man/tmpfiles.d.html",
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["systemd.time(7)"] = "https://www.freedesktop.org/software/systemd/man/systemd.time.html",
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["systemd-fstab-generator(8)"] = "https://www.freedesktop.org/software/systemd/man/systemd-fstab-generator.html",
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["systemd-networkd-wait-online.service(8)"] = "https://www.freedesktop.org/software/systemd/man/systemd-networkd-wait-online.service.html",
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}
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function Code(elem)
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local is_man_role = elem.classes:includes('interpreted-text') and elem.attributes['role'] == 'manpage'
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if is_man_role and man_urls[elem.text] ~= nil then
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return pandoc.Link(elem, man_urls[elem.text])
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end
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end
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@ -53,7 +53,7 @@ Additional syntax extensions are available, though not all extensions can be use
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This syntax is taken from [MyST](https://myst-parser.readthedocs.io/en/latest/using/syntax.html#targets-and-cross-referencing).
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- []{#ssec-contributing-markup-inline-roles}
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If you want to link to a man page, you can use `` {manpage}`nix.conf(5)` ``, which will turn into {manpage}`nix.conf(5)`. The references will turn into links when a mapping exists in {file}`doc/build-aux/pandoc-filters/link-unix-man-references.lua`.
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If you want to link to a man page, you can use `` {manpage}`nix.conf(5)` ``, which will turn into {manpage}`nix.conf(5)`. The references will turn into links when a mapping exists in {file}`doc/manpage-urls.json`.
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A few markups for other kinds of literals are also available:
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@ -36,4 +36,5 @@ in pkgs.stdenv.mkDerivation {
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# Environment variables
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PANDOC_LUA_FILTERS_DIR = "${pkgs.pandoc-lua-filters}/share/pandoc/filters";
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PANDOC_LINK_MANPAGES_FILTER = import build-aux/pandoc-filters/link-manpages.nix { inherit pkgs; };
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}
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29
doc/manpage-urls.json
Normal file
29
doc/manpage-urls.json
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@ -0,0 +1,29 @@
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{
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"nix.conf(5)": "https://nixos.org/manual/nix/stable/#sec-conf-file",
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"journald.conf(5)": "https://www.freedesktop.org/software/systemd/man/journald.conf.html",
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"logind.conf(5)": "https://www.freedesktop.org/software/systemd/man/logind.conf.html",
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"networkd.conf(5)": "https://www.freedesktop.org/software/systemd/man/networkd.conf.html",
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"systemd.automount(5)": "https://www.freedesktop.org/software/systemd/man/systemd.automount.html",
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"systemd.exec(5)": "https://www.freedesktop.org/software/systemd/man/systemd.exec.html",
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"systemd.link(5)": "https://www.freedesktop.org/software/systemd/man/systemd.link.html",
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"systemd.mount(5)": "https://www.freedesktop.org/software/systemd/man/systemd.mount.html",
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"systemd.netdev(5)": "https://www.freedesktop.org/software/systemd/man/systemd.netdev.html",
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"systemd.network(5)": "https://www.freedesktop.org/software/systemd/man/systemd.network.html",
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"systemd.nspawn(5)": "https://www.freedesktop.org/software/systemd/man/systemd.nspawn.html",
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"systemd.path(5)": "https://www.freedesktop.org/software/systemd/man/systemd.path.html",
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"systemd.resource-control(5)": "https://www.freedesktop.org/software/systemd/man/systemd.resource-control.html",
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"systemd.scope(5)": "https://www.freedesktop.org/software/systemd/man/systemd.scope.html",
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"systemd.service(5)": "https://www.freedesktop.org/software/systemd/man/systemd.service.html",
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"systemd.slice(5)": "https://www.freedesktop.org/software/systemd/man/systemd.slice.html",
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"systemd.socket(5)": "https://www.freedesktop.org/software/systemd/man/systemd.socket.html",
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"systemd.timer(5)": "https://www.freedesktop.org/software/systemd/man/systemd.timer.html",
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"systemd.unit(5)": "https://www.freedesktop.org/software/systemd/man/systemd.unit.html",
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"systemd-system.conf(5)": "https://www.freedesktop.org/software/systemd/man/systemd-system.conf.html",
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"systemd-user.conf(5)": "https://www.freedesktop.org/software/systemd/man/systemd-user.conf.html",
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"timesyncd.conf(5)": "https://www.freedesktop.org/software/systemd/man/timesyncd.conf.html",
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"tmpfiles.d(5)": "https://www.freedesktop.org/software/systemd/man/tmpfiles.d.html",
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"systemd.time(7)": "https://www.freedesktop.org/software/systemd/man/systemd.time.html",
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"systemd-fstab-generator(8)": "https://www.freedesktop.org/software/systemd/man/systemd-fstab-generator.html",
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"systemd-networkd-wait-online.service(8)": "https://www.freedesktop.org/software/systemd/man/systemd-networkd-wait-online.service.html"
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}
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@ -41,7 +41,7 @@ pandoc_flags=(
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# - diagram-generator.lua (we do not support that in NixOS manual to limit dependencies)
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# - media extraction (was only required for diagram generator)
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# - myst-reader/roles.lua (only relevant for MyST → DocBook)
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# - link-unix-man-references.lua (links should only be added to display output)
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# - link-manpages.lua (links should only be added to display output)
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# - docbook-writer/rst-roles.lua (only relevant for → DocBook)
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# - docbook-writer/labelless-link-is-xref.lua (only relevant for → DocBook)
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"--lua-filter=$DIR/../../doc/build-aux/pandoc-filters/docbook-reader/citerefentry-to-rst-role.lua"
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@ -8,6 +8,8 @@
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DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
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pushd "$DIR"
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link_manpages_filter=$(nix-build --no-out-link "$DIR/../../../doc/build-aux/pandoc-filters/link-manpages.nix")
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# NOTE: Keep in sync with Nixpkgs manual (/doc/Makefile).
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# TODO: Remove raw-attribute when we can get rid of DocBook altogether.
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pandoc_commonmark_enabled_extensions=+attributes+fenced_divs+footnotes+bracketed_spans+definition_lists+pipe_tables+raw_attribute
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@ -17,7 +19,7 @@ pandoc_flags=(
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# - media extraction (was only required for diagram generator)
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# - docbook-reader/citerefentry-to-rst-role.lua (only relevant for DocBook → MarkDown/rST/MyST)
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"--lua-filter=$DIR/../../../doc/build-aux/pandoc-filters/myst-reader/roles.lua"
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"--lua-filter=$DIR/../../../doc/build-aux/pandoc-filters/link-unix-man-references.lua"
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"--lua-filter=$link_manpages_filter"
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"--lua-filter=$DIR/../../../doc/build-aux/pandoc-filters/docbook-writer/rst-roles.lua"
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"--lua-filter=$DIR/../../../doc/build-aux/pandoc-filters/docbook-writer/html-elements.lua"
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"--lua-filter=$DIR/../../../doc/build-aux/pandoc-filters/docbook-writer/labelless-link-is-xref.lua"
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