@@ -0,0 +1,174 @@
1+# This file has been generated by Niv.
2+
3+let
4+
5+ #
6+ # The fetchers. fetch_<type> fetches specs of type <type>.
7+ #
8+
9+ fetch_file = pkgs: name: spec:
10+ let
11+ name' = sanitizeName name + "-src";
12+ in
13+ if spec.builtin or true then
14+ builtins_fetchurl { inherit (spec) url sha256; name = name'; }
15+ else
16+ pkgs.fetchurl { inherit (spec) url sha256; name = name'; };
17+
18+ fetch_tarball = pkgs: name: spec:
19+ let
20+ name' = sanitizeName name + "-src";
21+ in
22+ if spec.builtin or true then
23+ builtins_fetchTarball { name = name'; inherit (spec) url sha256; }
24+ else
25+ pkgs.fetchzip { name = name'; inherit (spec) url sha256; };
26+
27+ fetch_git = name: spec:
28+ let
29+ ref =
30+ if spec ? ref then spec.ref else
31+ if spec ? branch then "refs/heads/${spec.branch}" else
32+ if spec ? tag then "refs/tags/${spec.tag}" else
33+ abort "In git source '${name}': Please specify `ref`, `tag` or `branch`!";
34+ in
35+ builtins.fetchGit { url = spec.repo; inherit (spec) rev; inherit ref; };
36+
37+ fetch_local = spec: spec.path;
38+
39+ fetch_builtin-tarball = name: throw
40+ ''[${name}] The niv type "builtin-tarball" is deprecated. You should instead use `builtin = true`.
41+ $ niv modify ${name} -a type=tarball -a builtin=true'';
42+
43+ fetch_builtin-url = name: throw
44+ ''[${name}] The niv type "builtin-url" will soon be deprecated. You should instead use `builtin = true`.
45+ $ niv modify ${name} -a type=file -a builtin=true'';
46+
47+ #
48+ # Various helpers
49+ #
50+
51+ # https://github.com/NixOS/nixpkgs/pull/83241/files#diff-c6f540a4f3bfa4b0e8b6bafd4cd54e8bR695
52+ sanitizeName = name:
53+ (
54+ concatMapStrings (s: if builtins.isList s then "-" else s)
55+ (
56+ builtins.split "[^[:alnum:]+._?=-]+"
57+ ((x: builtins.elemAt (builtins.match "\\.*(.*)" x) 0) name)
58+ )
59+ );
60+
61+ # The set of packages used when specs are fetched using non-builtins.
62+ mkPkgs = sources: system:
63+ let
64+ sourcesNixpkgs =
65+ import (builtins_fetchTarball { inherit (sources.nixpkgs) url sha256; }) { inherit system; };
66+ hasNixpkgsPath = builtins.any (x: x.prefix == "nixpkgs") builtins.nixPath;
67+ hasThisAsNixpkgsPath = <nixpkgs> == ./.;
68+ in
69+ if builtins.hasAttr "nixpkgs" sources
70+ then sourcesNixpkgs
71+ else if hasNixpkgsPath && ! hasThisAsNixpkgsPath then
72+ import <nixpkgs> {}
73+ else
74+ abort
75+ ''
76+ Please specify either <nixpkgs> (through -I or NIX_PATH=nixpkgs=...) or
77+ add a package called "nixpkgs" to your sources.json.
78+ '';
79+
80+ # The actual fetching function.
81+ fetch = pkgs: name: spec:
82+
83+ if ! builtins.hasAttr "type" spec then
84+ abort "ERROR: niv spec ${name} does not have a 'type' attribute"
85+ else if spec.type == "file" then fetch_file pkgs name spec
86+ else if spec.type == "tarball" then fetch_tarball pkgs name spec
87+ else if spec.type == "git" then fetch_git name spec
88+ else if spec.type == "local" then fetch_local spec
89+ else if spec.type == "builtin-tarball" then fetch_builtin-tarball name
90+ else if spec.type == "builtin-url" then fetch_builtin-url name
91+ else
92+ abort "ERROR: niv spec ${name} has unknown type ${builtins.toJSON spec.type}";
93+
94+ # If the environment variable NIV_OVERRIDE_${name} is set, then use
95+ # the path directly as opposed to the fetched source.
96+ replace = name: drv:
97+ let
98+ saneName = stringAsChars (c: if isNull (builtins.match "[a-zA-Z0-9]" c) then "_" else c) name;
99+ ersatz = builtins.getEnv "NIV_OVERRIDE_${saneName}";
100+ in
101+ if ersatz == "" then drv else
102+ # this turns the string into an actual Nix path (for both absolute and
103+ # relative paths)
104+ if builtins.substring 0 1 ersatz == "/" then /. + ersatz else /. + builtins.getEnv "PWD" + "/${ersatz}";
105+
106+ # Ports of functions for older nix versions
107+
108+ # a Nix version of mapAttrs if the built-in doesn't exist
109+ mapAttrs = builtins.mapAttrs or (
110+ f: set: with builtins;
111+ listToAttrs (map (attr: { name = attr; value = f attr set.${attr}; }) (attrNames set))
112+ );
113+
114+ # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/lists.nix#L295
115+ range = first: last: if first > last then [] else builtins.genList (n: first + n) (last - first + 1);
116+
117+ # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L257
118+ stringToCharacters = s: map (p: builtins.substring p 1 s) (range 0 (builtins.stringLength s - 1));
119+
120+ # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L269
121+ stringAsChars = f: s: concatStrings (map f (stringToCharacters s));
122+ concatMapStrings = f: list: concatStrings (map f list);
123+ concatStrings = builtins.concatStringsSep "";
124+
125+ # https://github.com/NixOS/nixpkgs/blob/8a9f58a375c401b96da862d969f66429def1d118/lib/attrsets.nix#L331
126+ optionalAttrs = cond: as: if cond then as else {};
127+
128+ # fetchTarball version that is compatible between all the versions of Nix
129+ builtins_fetchTarball = { url, name ? null, sha256 }@attrs:
130+ let
131+ inherit (builtins) lessThan nixVersion fetchTarball;
132+ in
133+ if lessThan nixVersion "1.12" then
134+ fetchTarball ({ inherit url; } // (optionalAttrs (!isNull name) { inherit name; }))
135+ else
136+ fetchTarball attrs;
137+
138+ # fetchurl version that is compatible between all the versions of Nix
139+ builtins_fetchurl = { url, name ? null, sha256 }@attrs:
140+ let
141+ inherit (builtins) lessThan nixVersion fetchurl;
142+ in
143+ if lessThan nixVersion "1.12" then
144+ fetchurl ({ inherit url; } // (optionalAttrs (!isNull name) { inherit name; }))
145+ else
146+ fetchurl attrs;
147+
148+ # Create the final "sources" from the config
149+ mkSources = config:
150+ mapAttrs (
151+ name: spec:
152+ if builtins.hasAttr "outPath" spec
153+ then abort
154+ "The values in sources.json should not have an 'outPath' attribute"
155+ else
156+ spec // { outPath = replace name (fetch config.pkgs name spec); }
157+ ) config.sources;
158+
159+ # The "config" used by the fetchers
160+ mkConfig =
161+ { sourcesFile ? if builtins.pathExists ./sources.json then ./sources.json else null
162+ , sources ? if isNull sourcesFile then {} else builtins.fromJSON (builtins.readFile sourcesFile)
163+ , system ? builtins.currentSystem
164+ , pkgs ? mkPkgs sources system
165+ }: rec {
166+ # The sources, i.e. the attribute set of spec name to spec
167+ inherit sources;
168+
169+ # The "pkgs" (evaluated nixpkgs) to use for e.g. non-builtin fetchers
170+ inherit pkgs;
171+ };
172+
173+in
174+mkSources (mkConfig {}) // { __functor = _: settings: mkSources (mkConfig settings); }