@@ -0,0 +1,171 @@
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_${saneName}";
100+ in
101+ if ersatz == "" then drv else ersatz;
102+
103+ # Ports of functions for older nix versions
104+
105+ # a Nix version of mapAttrs if the built-in doesn't exist
106+ mapAttrs = builtins.mapAttrs or (
107+ f: set: with builtins;
108+ listToAttrs (map (attr: { name = attr; value = f attr set.${attr}; }) (attrNames set))
109+ );
110+
111+ # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/lists.nix#L295
112+ range = first: last: if first > last then [] else builtins.genList (n: first + n) (last - first + 1);
113+
114+ # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L257
115+ stringToCharacters = s: map (p: builtins.substring p 1 s) (range 0 (builtins.stringLength s - 1));
116+
117+ # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L269
118+ stringAsChars = f: s: concatStrings (map f (stringToCharacters s));
119+ concatMapStrings = f: list: concatStrings (map f list);
120+ concatStrings = builtins.concatStringsSep "";
121+
122+ # https://github.com/NixOS/nixpkgs/blob/8a9f58a375c401b96da862d969f66429def1d118/lib/attrsets.nix#L331
123+ optionalAttrs = cond: as: if cond then as else {};
124+
125+ # fetchTarball version that is compatible between all the versions of Nix
126+ builtins_fetchTarball = { url, name ? null, sha256 }@attrs:
127+ let
128+ inherit (builtins) lessThan nixVersion fetchTarball;
129+ in
130+ if lessThan nixVersion "1.12" then
131+ fetchTarball ({ inherit url; } // (optionalAttrs (!isNull name) { inherit name; }))
132+ else
133+ fetchTarball attrs;
134+
135+ # fetchurl version that is compatible between all the versions of Nix
136+ builtins_fetchurl = { url, name ? null, sha256 }@attrs:
137+ let
138+ inherit (builtins) lessThan nixVersion fetchurl;
139+ in
140+ if lessThan nixVersion "1.12" then
141+ fetchurl ({ inherit url; } // (optionalAttrs (!isNull name) { inherit name; }))
142+ else
143+ fetchurl attrs;
144+
145+ # Create the final "sources" from the config
146+ mkSources = config:
147+ mapAttrs (
148+ name: spec:
149+ if builtins.hasAttr "outPath" spec
150+ then abort
151+ "The values in sources.json should not have an 'outPath' attribute"
152+ else
153+ spec // { outPath = replace name (fetch config.pkgs name spec); }
154+ ) config.sources;
155+
156+ # The "config" used by the fetchers
157+ mkConfig =
158+ { sourcesFile ? if builtins.pathExists ./sources.json then ./sources.json else null
159+ , sources ? if isNull sourcesFile then {} else builtins.fromJSON (builtins.readFile sourcesFile)
160+ , system ? builtins.currentSystem
161+ , pkgs ? mkPkgs sources system
162+ }: rec {
163+ # The sources, i.e. the attribute set of spec name to spec
164+ inherit sources;
165+
166+ # The "pkgs" (evaluated nixpkgs) to use for e.g. non-builtin fetchers
167+ inherit pkgs;
168+ };
169+
170+in
171+mkSources (mkConfig {}) // { __functor = _: settings: mkSources (mkConfig settings); }