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https://github.com/NixOS/nixpkgs.git
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a8d4cf149c
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.
88 lines
2.9 KiB
Bash
Executable file
88 lines
2.9 KiB
Bash
Executable file
#! /usr/bin/env nix-shell
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#! nix-shell -I nixpkgs=. -i bash -p pandoc
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# This script is temporarily needed while we transition the manual to
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# CommonMark. It converts DocBook files into our CommonMark flavour.
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debug=
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files=()
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while [ "$#" -gt 0 ]; do
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i="$1"; shift 1
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case "$i" in
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--debug)
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debug=1
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;;
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*)
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files+=("$i")
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;;
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esac
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done
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echo "WARNING: This is an experimental script and might not preserve all formatting." > /dev/stderr
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echo "Please report any issues you discover." > /dev/stderr
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outExtension="md"
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if [[ $debug ]]; then
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outExtension="json"
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fi
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DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
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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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targetLang="commonmark${pandoc_commonmark_enabled_extensions}+smart"
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if [[ $debug ]]; then
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targetLang=json
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fi
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pandoc_flags=(
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# Not needed:
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# - diagram-generator.lua (we do not support that in NixOS manual to limit dependencies)
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# - media extraction (was only required for diagram generator)
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# - myst-reader/roles.lua (only relevant for MyST → DocBook)
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# - link-manpages.lua (links should only be added to display output)
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# - docbook-writer/rst-roles.lua (only relevant for → DocBook)
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# - docbook-writer/labelless-link-is-xref.lua (only relevant for → DocBook)
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"--lua-filter=$DIR/../../doc/build-aux/pandoc-filters/docbook-reader/citerefentry-to-rst-role.lua"
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"--lua-filter=$DIR/../../doc/build-aux/pandoc-filters/myst-writer/roles.lua"
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"--lua-filter=$DIR/doc/unknown-code-language.lua"
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-f docbook
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-t "$targetLang"
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--tab-stop=2
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--wrap=none
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)
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for file in "${files[@]}"; do
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if [[ ! -f "$file" ]]; then
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echo "db-to-md.sh: $file does not exist" > /dev/stderr
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exit 1
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else
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rootElement=$(xmllint --xpath 'name(//*)' "$file")
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if [[ $rootElement = chapter ]]; then
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extension=".chapter.$outExtension"
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elif [[ $rootElement = section ]]; then
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extension=".section.$outExtension"
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else
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echo "db-to-md.sh: $file contains an unsupported root element $rootElement" > /dev/stderr
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exit 1
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fi
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outFile="${file%".section.xml"}"
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outFile="${outFile%".chapter.xml"}"
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outFile="${outFile%".xml"}$extension"
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temp1=$(mktemp)
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$DIR/doc/escape-code-markup.py "$file" "$temp1"
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if [[ $debug ]]; then
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echo "Converted $file to $temp1" > /dev/stderr
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fi
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temp2=$(mktemp)
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$DIR/doc/replace-xrefs-by-empty-links.py "$temp1" "$temp2"
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if [[ $debug ]]; then
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echo "Converted $temp1 to $temp2" > /dev/stderr
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fi
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pandoc "$temp2" -o "$outFile" "${pandoc_flags[@]}"
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echo "Converted $file to $outFile" > /dev/stderr
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fi
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done
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