diff options
Diffstat (limited to 'util/nix/sources.nix')
| -rw-r--r-- | util/nix/sources.nix | 174 | 
1 files changed, 174 insertions, 0 deletions
| diff --git a/util/nix/sources.nix b/util/nix/sources.nix new file mode 100644 index 0000000000..1938409ddd --- /dev/null +++ b/util/nix/sources.nix @@ -0,0 +1,174 @@ +# This file has been generated by Niv. + +let + +  # +  # The fetchers. fetch_<type> fetches specs of type <type>. +  # + +  fetch_file = pkgs: name: spec: +    let +      name' = sanitizeName name + "-src"; +    in +      if spec.builtin or true then +        builtins_fetchurl { inherit (spec) url sha256; name = name'; } +      else +        pkgs.fetchurl { inherit (spec) url sha256; name = name'; }; + +  fetch_tarball = pkgs: name: spec: +    let +      name' = sanitizeName name + "-src"; +    in +      if spec.builtin or true then +        builtins_fetchTarball { name = name'; inherit (spec) url sha256; } +      else +        pkgs.fetchzip { name = name'; inherit (spec) url sha256; }; + +  fetch_git = name: spec: +    let +      ref = +        if spec ? ref then spec.ref else +          if spec ? branch then "refs/heads/${spec.branch}" else +            if spec ? tag then "refs/tags/${spec.tag}" else +              abort "In git source '${name}': Please specify `ref`, `tag` or `branch`!"; +    in +      builtins.fetchGit { url = spec.repo; inherit (spec) rev; inherit ref; }; + +  fetch_local = spec: spec.path; + +  fetch_builtin-tarball = name: throw +    ''[${name}] The niv type "builtin-tarball" is deprecated. You should instead use `builtin = true`. +        $ niv modify ${name} -a type=tarball -a builtin=true''; + +  fetch_builtin-url = name: throw +    ''[${name}] The niv type "builtin-url" will soon be deprecated. You should instead use `builtin = true`. +        $ niv modify ${name} -a type=file -a builtin=true''; + +  # +  # Various helpers +  # + +  # https://github.com/NixOS/nixpkgs/pull/83241/files#diff-c6f540a4f3bfa4b0e8b6bafd4cd54e8bR695 +  sanitizeName = name: +    ( +      concatMapStrings (s: if builtins.isList s then "-" else s) +        ( +          builtins.split "[^[:alnum:]+._?=-]+" +            ((x: builtins.elemAt (builtins.match "\\.*(.*)" x) 0) name) +        ) +    ); + +  # The set of packages used when specs are fetched using non-builtins. +  mkPkgs = sources: system: +    let +      sourcesNixpkgs = +        import (builtins_fetchTarball { inherit (sources.nixpkgs) url sha256; }) { inherit system; }; +      hasNixpkgsPath = builtins.any (x: x.prefix == "nixpkgs") builtins.nixPath; +      hasThisAsNixpkgsPath = <nixpkgs> == ./.; +    in +      if builtins.hasAttr "nixpkgs" sources +      then sourcesNixpkgs +      else if hasNixpkgsPath && ! hasThisAsNixpkgsPath then +        import <nixpkgs> {} +      else +        abort +          '' +            Please specify either <nixpkgs> (through -I or NIX_PATH=nixpkgs=...) or +            add a package called "nixpkgs" to your sources.json. +          ''; + +  # The actual fetching function. +  fetch = pkgs: name: spec: + +    if ! builtins.hasAttr "type" spec then +      abort "ERROR: niv spec ${name} does not have a 'type' attribute" +    else if spec.type == "file" then fetch_file pkgs name spec +    else if spec.type == "tarball" then fetch_tarball pkgs name spec +    else if spec.type == "git" then fetch_git name spec +    else if spec.type == "local" then fetch_local spec +    else if spec.type == "builtin-tarball" then fetch_builtin-tarball name +    else if spec.type == "builtin-url" then fetch_builtin-url name +    else +      abort "ERROR: niv spec ${name} has unknown type ${builtins.toJSON spec.type}"; + +  # If the environment variable NIV_OVERRIDE_${name} is set, then use +  # the path directly as opposed to the fetched source. +  replace = name: drv: +    let +      saneName = stringAsChars (c: if isNull (builtins.match "[a-zA-Z0-9]" c) then "_" else c) name; +      ersatz = builtins.getEnv "NIV_OVERRIDE_${saneName}"; +    in +      if ersatz == "" then drv else +        # this turns the string into an actual Nix path (for both absolute and +        # relative paths) +        if builtins.substring 0 1 ersatz == "/" then /. + ersatz else /. + builtins.getEnv "PWD" + "/${ersatz}"; + +  # Ports of functions for older nix versions + +  # a Nix version of mapAttrs if the built-in doesn't exist +  mapAttrs = builtins.mapAttrs or ( +    f: set: with builtins; +    listToAttrs (map (attr: { name = attr; value = f attr set.${attr}; }) (attrNames set)) +  ); + +  # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/lists.nix#L295 +  range = first: last: if first > last then [] else builtins.genList (n: first + n) (last - first + 1); + +  # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L257 +  stringToCharacters = s: map (p: builtins.substring p 1 s) (range 0 (builtins.stringLength s - 1)); + +  # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L269 +  stringAsChars = f: s: concatStrings (map f (stringToCharacters s)); +  concatMapStrings = f: list: concatStrings (map f list); +  concatStrings = builtins.concatStringsSep ""; + +  # https://github.com/NixOS/nixpkgs/blob/8a9f58a375c401b96da862d969f66429def1d118/lib/attrsets.nix#L331 +  optionalAttrs = cond: as: if cond then as else {}; + +  # fetchTarball version that is compatible between all the versions of Nix +  builtins_fetchTarball = { url, name ? null, sha256 }@attrs: +    let +      inherit (builtins) lessThan nixVersion fetchTarball; +    in +      if lessThan nixVersion "1.12" then +        fetchTarball ({ inherit url; } // (optionalAttrs (!isNull name) { inherit name; })) +      else +        fetchTarball attrs; + +  # fetchurl version that is compatible between all the versions of Nix +  builtins_fetchurl = { url, name ? null, sha256 }@attrs: +    let +      inherit (builtins) lessThan nixVersion fetchurl; +    in +      if lessThan nixVersion "1.12" then +        fetchurl ({ inherit url; } // (optionalAttrs (!isNull name) { inherit name; })) +      else +        fetchurl attrs; + +  # Create the final "sources" from the config +  mkSources = config: +    mapAttrs ( +      name: spec: +        if builtins.hasAttr "outPath" spec +        then abort +          "The values in sources.json should not have an 'outPath' attribute" +        else +          spec // { outPath = replace name (fetch config.pkgs name spec); } +    ) config.sources; + +  # The "config" used by the fetchers +  mkConfig = +    { sourcesFile ? if builtins.pathExists ./sources.json then ./sources.json else null +    , sources ? if isNull sourcesFile then {} else builtins.fromJSON (builtins.readFile sourcesFile) +    , system ? builtins.currentSystem +    , pkgs ? mkPkgs sources system +    }: rec { +      # The sources, i.e. the attribute set of spec name to spec +      inherit sources; + +      # The "pkgs" (evaluated nixpkgs) to use for e.g. non-builtin fetchers +      inherit pkgs; +    }; + +in +mkSources (mkConfig {}) // { __functor = _: settings: mkSources (mkConfig settings); } | 
