nixpkgs/pkgs/development/tools/pandoc/default.nix
sternenseemann e0e903c391 haskellPackages.cabal2nix-unstable: 2024-01-02 -> 2024-01-04
pandoc: install man pages from pandoc-cli tarball

The pandoc man pages moved from pandoc to pandoc-cli, so we need to
install them elsewhere. The install script for this was emitted by
cabal2nix which we now stop doing for pandoc >= 3.1.10 (so
haskellPackages.pandoc still has man pages). Instead we manually add an
override where it matters to us, namely
pkgs.pandoc (haskellPackages.pandoc-cli is lacking them now, not sure if
we need to care).
2024-01-04 16:57:20 +01:00

58 lines
2.7 KiB
Nix

{ stdenv, lib, haskellPackages, haskell, removeReferencesTo, installShellFiles }:
let
# Since pandoc 3.0 the pandoc binary resides in the pandoc-cli package.
static = haskell.lib.compose.justStaticExecutables haskellPackages.pandoc-cli;
in
(haskell.lib.compose.overrideCabal (drv: {
# pandoc-cli's pandoc executable report the libraries version via --version, match that,
inherit (static.scope.pandoc) version;
# but prevent haskellPackages.mkDerivation from recomputing the src tarball based on that.
inherit (static) src;
# Make it possible to recover the cli version if necessary.
passthru = drv.passthru or {} // {
cliVersion = static.version;
};
configureFlags = drv.configureFlags or [] ++ ["-fembed_data_files"];
buildDepends = drv.buildDepends or [] ++ [haskellPackages.file-embed];
buildTools = (drv.buildTools or []) ++ [
removeReferencesTo
installShellFiles
];
# Normally, the static linked executable shouldn't refer to any library or the compiler.
# This is not always the case when the dependency has Paths_* module generated by Cabal,
# where bindir, datadir, and libdir contain the path to the library, and thus make the
# executable indirectly refer to GHC. However, most Haskell programs only use Paths_*.version for
# getting the version at runtime, so it's safe to remove the references to them.
# This is true so far for pandoc-types and warp.
# For details see: https://github.com/NixOS/nixpkgs/issues/34376
postInstall = drv.postInstall or "" + ''
remove-references-to \
-t ${haskellPackages.pandoc-types} \
$out/bin/pandoc
remove-references-to \
-t ${haskellPackages.warp} \
$out/bin/pandoc
remove-references-to \
-t ${haskellPackages.pandoc_3_1_11} \
$out/bin/pandoc
'' + lib.optionalString (stdenv.buildPlatform == stdenv.hostPlatform) ''
mkdir -p $out/share/bash-completion/completions
$out/bin/pandoc --bash-completion > $out/share/bash-completion/completions/pandoc
'' + ''
installManPage man/*
'';
}) static).overrideAttrs (drv: {
# These libraries are still referenced, because they generate
# a `Paths_*` module for figuring out their version.
# The `Paths_*` module is generated by Cabal, and contains the
# version, but also paths to e.g. the data directories, which
# lead to a transitive runtime dependency on the whole GHC distribution.
# This should ideally be fixed in haskellPackages (or even Cabal),
# but a minimal pandoc is important enough to patch it manually.
disallowedReferences = [ haskellPackages.pandoc-types haskellPackages.warp haskellPackages.pandoc_3_1_11 ];
})