# Copyright 2019 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Builds the documentation page using the Rust project's 'mdBook'
# tool.
#
# Some of the documentation is pulled in and included from other
# sources.

{ fetchFromGitHub, mdbook, runCommand, rustPlatform }:

let
  # nixpkgs currently has an old version of mdBook. A new version is
  # built here, but eventually the update will be upstreamed
  # (nixpkgs#65890)
  mdbook = rustPlatform.buildRustPackage rec {
    name = "mdbook-${version}";
    version = "0.3.1";
    doCheck = false;

    src = fetchFromGitHub {
      owner = "rust-lang-nursery";
      repo = "mdBook";
      rev = "v${version}";
      sha256 = "0py69267jbs6b7zw191hcs011cm1v58jz8mglqx3ajkffdfl3ghw";
    };

    cargoSha256 = "0qwhc42a86jpvjcaysmfcw8kmwa150lmz01flmlg74g6qnimff5m";
  };

  nix-1p = fetchFromGitHub {
    owner = "tazjin";
    repo = "nix-1p";
    rev = "3cd0f7d7b4f487d04a3f1e3ca8f2eb1ab958c49b";
    sha256 = "02lpda03q580gyspkbmlgnb2cbm66rrcgqsv99aihpbwyjym81af";
  };
in runCommand "nixery-book" { } ''
  mkdir -p $out
  cp -r ${./.}/* .
  chmod -R a+w src
  cp ${nix-1p}/README.md src/nix-1p.md
  ${mdbook}/bin/mdbook build -d $out
''