#!/bin/sh

NIX_EXTRA_FEATURE_ARGS="--extra-experimental-features nix-command --extra-experimental-features flakes"

## check if nix is found in the PATH
command -V nix || ( echo '"nix" is required for htldoc, but was not found in your PATH.'; echo "nix install instructions: https://nixos.org/download/"; exit 1)

if [ -f "htldoc.nix" ]; then
	htldocUrl=$(nix $NIX_EXTRA_FEATURE_ARGS eval --expr 'let config = (import ./htldoc.nix {}); in if builtins.hasAttr "htldocVersion" config then config.htldocVersion else "github:c2vi/htldoc/master"' --impure --raw)
	echo running htldoc version: $htldocUrl >&2
	exec nix $NIX_EXTRA_FEATURE_ARGS run $htldocUrl -- $@


else 
	exec nix $NIX_EXTRA_FEATURE_ARGS run github:c2vi/htldoc/master -- $@
fi