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path: root/nix/build_index.nix
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{ path ? "/../aws-list.txt", }:

with import ./common.nix;
let
  pkgs = import pkgsSrc { };
  lib = pkgs.lib;

  /* Converts a key list and a value list to a set

     Example:
       listToSet [ "name" "version" ] [ "latex" "3.14" ]
       => { name = "latex"; version = "3.14"; }
  */
  listToSet = keys: values:
    builtins.listToAttrs (lib.zipListsWith (a: b: {
      name = a;
      value = b;
    }) keys values);

  /* Says if datetime a is more recent than datetime b

     Example:
       cmpDate { date = "2021-09-10"; time = "22:12:15"; } { date = "2021-02-03"; time = "23:54:12"; }
       => true
  */
  cmpDate = a: b:
    let
      da = (builtins.head a.builds).date;
      db = (builtins.head b.builds).date;
    in if da == db then
      (builtins.head a.builds).time > (builtins.head b.builds).time
    else
      da > db;

  # Pretty platforms
  prettyPlatform = name:
    if name == "aarch64-unknown-linux-musl" then
      "linux/arm64"
    else if name == "armv6l-unknown-linux-musleabihf" then
      "linux/arm"
    else if name == "x86_64-unknown-linux-musl" then
      "linux/amd64"
    else if name == "i686-unknown-linux-musl" then
      "linux/386"
    else
      name;

  # Parsing
  list = builtins.readFile (./. + path);
  entries = lib.splitString "\n" list;

  elems = builtins.filter (e: (builtins.length e) == 4)
    (map (x: builtins.filter (e: e != "") (lib.splitString " " x)) entries);

  keys = [ "date" "time" "size" "path" ];
  parsed = map (entry: listToSet keys entry) elems;

  subkeys = [ "root" "version" "platform" "binary" ];
  builds = map (entry:
    entry // listToSet subkeys (lib.splitString "/" entry.path) // {
      url = "https://garagehq.deuxfleurs.fr/" + entry.path;
    }) parsed;

  # Aggregation
  builds_per_version = lib.foldl (acc: v:
    acc // {
      ${v.version} = if builtins.hasAttr v.version acc then
        acc.${v.version} ++ [ v ]
      else
        [ v ];
    }) { } builds;

  versions = builtins.attrNames builds_per_version;
  versions_release = builtins.filter
    (x: builtins.match "v[0-9]+.[0-9]+.[0-9]+(.[0-9]+)?" x != null) versions;
  versions_commit =
    builtins.filter (x: builtins.match "[0-9a-f]{40}" x != null) versions;
  versions_extra =
    lib.subtractLists (versions_release ++ versions_commit) versions;

  sorted_builds = [
    {
      name = "Release";
      hide = false;
      type = "tag";
      description =
        "Release builds are the official builds, they are tailored for productions and are the most tested.";
      builds = builtins.sort (a: b: a.version > b.version) (map (x: {
        version = x;
        builds = builtins.getAttr x builds_per_version;
      }) versions_release);
    }
    {
      name = "Extra";
      hide = true;
      type = "tag";
      description =
        "Extra builds are built on demand to test a specific feature or a specific need.";
      builds = builtins.sort cmpDate (map (x: {
        version = x;
        builds = builtins.getAttr x builds_per_version;
      }) versions_extra);
    }
    {
      name = "Development";
      hide = true;
      type = "commit";
      description =
        "Development builds are built periodically. Use them if you want to test a specific feature that is not yet released.";
      builds = builtins.sort cmpDate (map (x: {
        version = x;
        builds = builtins.getAttr x builds_per_version;
      }) versions_commit);
    }
  ];

  json =
    pkgs.writeTextDir "share/_releases.json" (builtins.toJSON sorted_builds);
  html = pkgs.writeTextDir "share/_releases.html" ''
    <!doctype html>
    <html>
      <head>
        <meta charset="utf-8" />
        <title>Garage releases</title>
        <style>
          html, body { margin:0; padding: 0 }
          body { font-family: 'Helvetica', Sans; }
          section { margin: 1rem; }
          ul { padding:0; margin: 0.2rem }
          li {
            border-radius: 0.2rem;
            display: inline; 
            border: 2px #0b5d83 solid; 
            padding: 0.5rem; 
            line-height: 3rem;
            color: #0b5d83;
          }
          li:hover { background-color: #0b5d83; color: #fff; }
          li a, li a:hover { color: inherit; text-decoration: none }
        </style>
      </head>
      <body>
       ${
         builtins.toString (lib.forEach sorted_builds (r: ''
           <section>
             <h2>${r.name} builds</h2>

             <p>${r.description}</p>

             ${
               if r.hide then
                 "<details><summary>Show ${r.name} builds</summary>"
               else
                 ""
             }
             ${
               builtins.toString (lib.forEach r.builds (x: ''
                 <h3> ${x.version} (${(builtins.head x.builds).date}) </h3>
                 <p>See this build on</p>
                 <p> Binaries:
                 <ul>
                 ${builtins.toString (lib.forEach x.builds (b: ''
                   <li><a href="/${b.path}">${
                     prettyPlatform b.platform
                   }</a></li>
                 ''))}
                 </ul></p>
                 <p> Sources:
                 <ul>
                  <li><a href="https://git.deuxfleurs.fr/Deuxfleurs/garage/src/${r.type}/${x.version}">gitea</a></li>
                  <li><a href="https://git.deuxfleurs.fr/Deuxfleurs/garage/archive/${x.version}.zip">.zip</a></li>
                  <li><a href="https://git.deuxfleurs.fr/Deuxfleurs/garage/archive/${x.version}.tar.gz">.tar.gz</a></li>
                 </ul></p>
               ''))
             }
             ${
               if builtins.length r.builds == 0 then
                 "<em>There is no build for this category</em>"
               else
                 ""
             }
             ${if r.hide then "</details>" else ""}
           </section>
         ''))
       }
      </body>
    </html>
  '';
in pkgs.symlinkJoin {
  name = "releases";
  paths = [ json html ];
}