nixpkgs/doc/doc-support/package.nix
Philip Taron 587f64a264
nixpkgs-manual: use injected revision only
`lib.trivial.revisionWithDefault` will change with every Git commit, which causes the manual to be rebuilt on every since PR.

Using `nixpkgs.rev` (or the dummy value "master" if it's not present) means that the manual will contain the revision if built on Hydra, but will not otherwise.

Why?

1. https://hydra.nixos.org/jobset/nixos/trunk-combined#tabs-configuration shows that `pkgs/top-level/release.nix` is passed the `nixpkgs` attrset, which is a "Git checkout".
2. Git checkouts come from [`builtins.fetchGit`](https://nix.dev/manual/nix/2.18/language/builtins#builtins-fetchGit) and include the `rev` attribute.
3. The `rev` attribute is what `lib.trivial.revisionWithDefault` would have returned.

So, using `nixpkgs.rev or "master"` exclusively will cause the rebuilds on every commit to cease, but will allow "official" nixpkgs manual built on Hydra to continue to reference a specific commit.
2024-07-29 11:29:15 -07:00

107 lines
3.0 KiB
Nix

# This file describes the Nixpkgs manual, which happens to use module docs infra originally
# developed for NixOS. To build this derivation, run `nix-build -A nixpkgs-manual`.
#
{
lib,
stdenvNoCC,
callPackage,
documentation-highlighter,
nixos-render-docs,
nixpkgs ? { },
}:
stdenvNoCC.mkDerivation (
finalAttrs:
let
inherit (finalAttrs.finalPackage.optionsDoc) optionsJSON;
inherit (finalAttrs.finalPackage) epub lib-docs pythonInterpreterTable;
in
{
name = "nixpkgs-manual";
nativeBuildInputs = [ nixos-render-docs ];
src = lib.fileset.toSource {
root = ../.;
fileset = lib.fileset.unions [
(lib.fileset.fileFilter (file: file.hasExt "md" || file.hasExt "md.in") ../.)
../style.css
../anchor-use.js
../anchor.min.js
../manpage-urls.json
];
};
postPatch = ''
ln -s ${optionsJSON}/share/doc/nixos/options.json ./config-options.json
'';
buildPhase = ''
substituteInPlace ./languages-frameworks/python.section.md \
--subst-var-by python-interpreter-table "$(<"${pythonInterpreterTable}")"
cat \
./functions/library.md.in \
${lib-docs}/index.md \
> ./functions/library.md
substitute ./manual.md.in ./manual.md \
--replace-fail '@MANUAL_VERSION@' '${lib.version}'
mkdir -p out/media
mkdir -p out/highlightjs
cp -t out/highlightjs \
${documentation-highlighter}/highlight.pack.js \
${documentation-highlighter}/LICENSE \
${documentation-highlighter}/mono-blue.css \
${documentation-highlighter}/loader.js
cp -t out ./style.css ./anchor.min.js ./anchor-use.js
nixos-render-docs manual html \
--manpage-urls ./manpage-urls.json \
--revision ${nixpkgs.rev or "master"} \
--stylesheet style.css \
--stylesheet highlightjs/mono-blue.css \
--script ./highlightjs/highlight.pack.js \
--script ./highlightjs/loader.js \
--script ./anchor.min.js \
--script ./anchor-use.js \
--toc-depth 1 \
--section-toc-depth 1 \
manual.md \
out/index.html
'';
installPhase = ''
dest="$out/share/doc/nixpkgs"
mkdir -p "$(dirname "$dest")"
mv out "$dest"
mv "$dest/index.html" "$dest/manual.html"
cp ${epub} "$dest/nixpkgs-manual.epub"
mkdir -p $out/nix-support/
echo "doc manual $dest manual.html" >> $out/nix-support/hydra-build-products
echo "doc manual $dest nixpkgs-manual.epub" >> $out/nix-support/hydra-build-products
'';
passthru = {
lib-docs = callPackage ./lib-function-docs.nix { inherit nixpkgs; };
epub = callPackage ./epub.nix { };
optionsDoc = callPackage ./options-doc.nix { };
pythonInterpreterTable = callPackage ./python-interpreter-table.nix { };
shell = callPackage ../../pkgs/tools/nix/web-devmode.nix {
buildArgs = "./.";
open = "/share/doc/nixpkgs/manual.html";
};
tests.manpage-urls = callPackage ../tests/manpage-urls.nix { };
};
}
)