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# This file has been generated by Niv. |
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let |
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# |
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# The fetchers. fetch_<type> fetches specs of type <type>. |
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# |
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fetch_file = pkgs: spec: |
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if spec.builtin or true then |
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builtins_fetchurl { inherit (spec) url sha256; } |
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else |
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pkgs.fetchurl { inherit (spec) url sha256; }; |
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fetch_tarball = pkgs: spec: |
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if spec.builtin or true then |
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builtins_fetchTarball { inherit (spec) url sha256; } |
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else |
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pkgs.fetchzip { inherit (spec) url sha256; }; |
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fetch_git = spec: |
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builtins.fetchGit { url = spec.repo; inherit (spec) rev ref; }; |
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fetch_builtin-tarball = spec: |
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builtins.trace |
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'' |
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WARNING: |
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The niv type "builtin-tarball" will soon be deprecated. You should |
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instead use `builtin = true`. |
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$ niv modify <package> -a type=tarball -a builtin=true |
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'' |
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builtins_fetchTarball { inherit (spec) url sha256; }; |
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fetch_builtin-url = spec: |
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builtins.trace |
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'' |
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WARNING: |
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The niv type "builtin-url" will soon be deprecated. You should |
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instead use `builtin = true`. |
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$ niv modify <package> -a type=file -a builtin=true |
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'' |
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(builtins_fetchurl { inherit (spec) url sha256; }); |
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# |
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# Various helpers |
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# |
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# The set of packages used when specs are fetched using non-builtins. |
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mkPkgs = sources: |
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let |
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sourcesNixpkgs = |
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import (builtins_fetchTarball { inherit (sources.nixpkgs) url sha256; }) {}; |
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hasNixpkgsPath = builtins.any (x: x.prefix == "nixpkgs") builtins.nixPath; |
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hasThisAsNixpkgsPath = <nixpkgs> == ./.; |
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in |
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if builtins.hasAttr "nixpkgs" sources |
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then sourcesNixpkgs |
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else if hasNixpkgsPath && ! hasThisAsNixpkgsPath then |
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import <nixpkgs> {} |
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else |
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abort |
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'' |
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Please specify either <nixpkgs> (through -I or NIX_PATH=nixpkgs=...) or |
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add a package called "nixpkgs" to your sources.json. |
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''; |
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# The actual fetching function. |
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fetch = pkgs: name: spec: |
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if ! builtins.hasAttr "type" spec then |
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abort "ERROR: niv spec ${name} does not have a 'type' attribute" |
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else if spec.type == "file" then fetch_file pkgs spec |
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else if spec.type == "tarball" then fetch_tarball pkgs spec |
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else if spec.type == "git" then fetch_git spec |
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else if spec.type == "builtin-tarball" then fetch_builtin-tarball spec |
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else if spec.type == "builtin-url" then fetch_builtin-url spec |
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else |
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abort "ERROR: niv spec ${name} has unknown type ${builtins.toJSON spec.type}"; |
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# Ports of functions for older nix versions |
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# a Nix version of mapAttrs if the built-in doesn't exist |
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mapAttrs = builtins.mapAttrs or ( |
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f: set: with builtins; |
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listToAttrs (map (attr: { name = attr; value = f attr set.${attr}; }) (attrNames set)) |
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); |
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# fetchTarball version that is compatible between all the versions of Nix |
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builtins_fetchTarball = { url, sha256 }@attrs: |
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let |
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inherit (builtins) lessThan nixVersion fetchTarball; |
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in |
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if lessThan nixVersion "1.12" then |
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fetchTarball { inherit url; } |
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else |
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fetchTarball attrs; |
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# fetchurl version that is compatible between all the versions of Nix |
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builtins_fetchurl = { url, sha256 }@attrs: |
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let |
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inherit (builtins) lessThan nixVersion fetchurl; |
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in |
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if lessThan nixVersion "1.12" then |
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fetchurl { inherit url; } |
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else |
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fetchurl attrs; |
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# Create the final "sources" from the config |
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mkSources = config: |
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mapAttrs ( |
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name: spec: |
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if builtins.hasAttr "outPath" spec |
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then abort |
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"The values in sources.json should not have an 'outPath' attribute" |
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else |
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spec // { outPath = fetch config.pkgs name spec; } |
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) config.sources; |
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# The "config" used by the fetchers |
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mkConfig = |
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{ sourcesFile ? ./sources.json |
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, sources ? builtins.fromJSON (builtins.readFile sourcesFile) |
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, pkgs ? mkPkgs sources |
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}: rec { |
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# The sources, i.e. the attribute set of spec name to spec |
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inherit sources; |
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# The "pkgs" (evaluated nixpkgs) to use for e.g. non-builtin fetchers |
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inherit pkgs; |
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}; |
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in |
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mkSources (mkConfig {}) // { __functor = _: settings: mkSources (mkConfig settings); } |
