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-rw-r--r--nix/sources.json26
-rw-r--r--nix/sources.nix148
2 files changed, 174 insertions, 0 deletions
diff --git a/nix/sources.json b/nix/sources.json
new file mode 100644
index 0000000..37bfdee
--- /dev/null
+++ b/nix/sources.json
@@ -0,0 +1,26 @@
1{
2 "niv": {
3 "branch": "master",
4 "description": "Easy dependency management for Nix projects",
5 "homepage": "https://github.com/nmattia/niv",
6 "owner": "nmattia",
7 "repo": "niv",
8 "rev": "20c899271f288d33114760bc298838575fc6c7f9",
9 "sha256": "07zswk6dhlydihl9g6skmy52grjvqpra8r98f2dmbgwzc1yhjhxq",
10 "type": "tarball",
11 "url": "https://github.com/nmattia/niv/archive/20c899271f288d33114760bc298838575fc6c7f9.tar.gz",
12 "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
13 },
14 "nixpkgs": {
15 "branch": "20.03",
16 "description": "Nix Packages collection",
17 "homepage": "",
18 "owner": "NixOS",
19 "repo": "nixpkgs",
20 "rev": "5272327b81ed355bbed5659b8d303cf2979b6953",
21 "sha256": "0182ys095dfx02vl2a20j1hz92dx3mfgz2a6fhn31bqlp1wa8hlq",
22 "type": "tarball",
23 "url": "https://github.com/NixOS/nixpkgs/archive/5272327b81ed355bbed5659b8d303cf2979b6953.tar.gz",
24 "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
25 }
26}
diff --git a/nix/sources.nix b/nix/sources.nix
new file mode 100644
index 0000000..b64b8f8
--- /dev/null
+++ b/nix/sources.nix
@@ -0,0 +1,148 @@
1# This file has been generated by Niv.
2
3let
4
5 #
6 # The fetchers. fetch_<type> fetches specs of type <type>.
7 #
8
9 fetch_file = pkgs: spec:
10 if spec.builtin or true then
11 builtins_fetchurl { inherit (spec) url sha256; }
12 else
13 pkgs.fetchurl { inherit (spec) url sha256; };
14
15 fetch_tarball = pkgs: name: spec:
16 let
17 ok = str: ! builtins.isNull (builtins.match "[a-zA-Z0-9+-._?=]" str);
18 # sanitize the name, though nix will still fail if name starts with period
19 name' = stringAsChars (x: if ! ok x then "-" else x) "${name}-src";
20 in
21 if spec.builtin or true then
22 builtins_fetchTarball { name = name'; inherit (spec) url sha256; }
23 else
24 pkgs.fetchzip { name = name'; inherit (spec) url sha256; };
25
26 fetch_git = spec:
27 builtins.fetchGit { url = spec.repo; inherit (spec) rev ref; };
28
29 fetch_local = spec: spec.path;
30
31 fetch_builtin-tarball = name: throw
32 ''[${name}] The niv type "builtin-tarball" is deprecated. You should instead use `builtin = true`.
33 $ niv modify ${name} -a type=tarball -a builtin=true'';
34
35 fetch_builtin-url = name: throw
36 ''[${name}] The niv type "builtin-url" will soon be deprecated. You should instead use `builtin = true`.
37 $ niv modify ${name} -a type=file -a builtin=true'';
38
39 #
40 # Various helpers
41 #
42
43 # The set of packages used when specs are fetched using non-builtins.
44 mkPkgs = sources:
45 let
46 sourcesNixpkgs =
47 import (builtins_fetchTarball { inherit (sources.nixpkgs) url sha256; }) {};
48 hasNixpkgsPath = builtins.any (x: x.prefix == "nixpkgs") builtins.nixPath;
49 hasThisAsNixpkgsPath = <nixpkgs> == ./.;
50 in
51 if builtins.hasAttr "nixpkgs" sources
52 then sourcesNixpkgs
53 else if hasNixpkgsPath && ! hasThisAsNixpkgsPath then
54 import <nixpkgs> {}
55 else
56 abort
57 ''
58 Please specify either <nixpkgs> (through -I or NIX_PATH=nixpkgs=...) or
59 add a package called "nixpkgs" to your sources.json.
60 '';
61
62 # The actual fetching function.
63 fetch = pkgs: name: spec:
64
65 if ! builtins.hasAttr "type" spec then
66 abort "ERROR: niv spec ${name} does not have a 'type' attribute"
67 else if spec.type == "file" then fetch_file pkgs spec
68 else if spec.type == "tarball" then fetch_tarball pkgs name spec
69 else if spec.type == "git" then fetch_git spec
70 else if spec.type == "local" then fetch_local spec
71 else if spec.type == "builtin-tarball" then fetch_builtin-tarball name
72 else if spec.type == "builtin-url" then fetch_builtin-url name
73 else
74 abort "ERROR: niv spec ${name} has unknown type ${builtins.toJSON spec.type}";
75
76 # If the environment variable NIV_OVERRIDE_${name} is set, then use
77 # the path directly as opposed to the fetched source.
78 replace = name: drv:
79 let
80 saneName = stringAsChars (c: if isNull (builtins.match "[a-zA-Z0-9]" c) then "_" else c) name;
81 ersatz = builtins.getEnv "NIV_OVERRIDE_${saneName}";
82 in
83 if ersatz == "" then drv else ersatz;
84
85 # Ports of functions for older nix versions
86
87 # a Nix version of mapAttrs if the built-in doesn't exist
88 mapAttrs = builtins.mapAttrs or (
89 f: set: with builtins;
90 listToAttrs (map (attr: { name = attr; value = f attr set.${attr}; }) (attrNames set))
91 );
92
93 # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/lists.nix#L295
94 range = first: last: if first > last then [] else builtins.genList (n: first + n) (last - first + 1);
95
96 # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L257
97 stringToCharacters = s: map (p: builtins.substring p 1 s) (range 0 (builtins.stringLength s - 1));
98
99 # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L269
100 stringAsChars = f: s: concatStrings (map f (stringToCharacters s));
101 concatStrings = builtins.concatStringsSep "";
102
103 # fetchTarball version that is compatible between all the versions of Nix
104 builtins_fetchTarball = { url, name, sha256 }@attrs:
105 let
106 inherit (builtins) lessThan nixVersion fetchTarball;
107 in
108 if lessThan nixVersion "1.12" then
109 fetchTarball { inherit name url; }
110 else
111 fetchTarball attrs;
112
113 # fetchurl version that is compatible between all the versions of Nix
114 builtins_fetchurl = { url, sha256 }@attrs:
115 let
116 inherit (builtins) lessThan nixVersion fetchurl;
117 in
118 if lessThan nixVersion "1.12" then
119 fetchurl { inherit url; }
120 else
121 fetchurl attrs;
122
123 # Create the final "sources" from the config
124 mkSources = config:
125 mapAttrs (
126 name: spec:
127 if builtins.hasAttr "outPath" spec
128 then abort
129 "The values in sources.json should not have an 'outPath' attribute"
130 else
131 spec // { outPath = replace name (fetch config.pkgs name spec); }
132 ) config.sources;
133
134 # The "config" used by the fetchers
135 mkConfig =
136 { sourcesFile ? if builtins.pathExists ./sources.json then ./sources.json else null
137 , sources ? if isNull sourcesFile then {} else builtins.fromJSON (builtins.readFile sourcesFile)
138 , pkgs ? mkPkgs sources
139 }: rec {
140 # The sources, i.e. the attribute set of spec name to spec
141 inherit sources;
142
143 # The "pkgs" (evaluated nixpkgs) to use for e.g. non-builtin fetchers
144 inherit pkgs;
145 };
146
147in
148mkSources (mkConfig {}) // { __functor = _: settings: mkSources (mkConfig settings); }