sources.nix (4219B)
1 # This file has been generated by Niv. 2 let 3 # 4 # The fetchers. fetch_<type> fetches specs of type <type>. 5 # 6 7 fetch_file = pkgs: spec: 8 if spec.builtin or true then 9 builtins_fetchurl { inherit (spec) url sha256; } 10 else 11 pkgs.fetchurl { inherit (spec) url sha256; }; 12 13 fetch_tarball = pkgs: spec: 14 if spec.builtin or true then 15 builtins_fetchTarball { inherit (spec) url sha256; } 16 else 17 pkgs.fetchzip { inherit (spec) url sha256; }; 18 19 fetch_git = spec: 20 builtins.fetchGit { url = spec.repo; inherit (spec) rev ref; }; 21 22 fetch_builtin-tarball = spec: 23 builtins.trace 24 '' 25 WARNING: 26 The niv type "builtin-tarball" will soon be deprecated. You should 27 instead use `builtin = true`. 28 29 $ niv modify <package> -a type=tarball -a builtin=true 30 '' 31 builtins_fetchTarball { inherit (spec) url sha256; }; 32 33 fetch_builtin-url = spec: 34 builtins.trace 35 '' 36 WARNING: 37 The niv type "builtin-url" will soon be deprecated. You should 38 instead use `builtin = true`. 39 40 $ niv modify <package> -a type=file -a builtin=true 41 '' 42 (builtins_fetchurl { inherit (spec) url sha256; }); 43 44 # 45 # Various helpers 46 # 47 48 # The set of packages used when specs are fetched using non-builtins. 49 mkPkgs = sources: 50 let 51 sourcesNixpkgs = 52 import (builtins_fetchTarball { inherit (sources.nixpkgs) url sha256; }) { }; 53 hasNixpkgsPath = builtins.any (x: x.prefix == "nixpkgs") builtins.nixPath; 54 hasThisAsNixpkgsPath = <nixpkgs> == ./.; 55 in 56 if builtins.hasAttr "nixpkgs" sources 57 then sourcesNixpkgs 58 else if hasNixpkgsPath && ! hasThisAsNixpkgsPath then 59 import <nixpkgs> { } 60 else 61 abort 62 '' 63 Please specify either <nixpkgs> (through -I or NIX_PATH=nixpkgs=...) or 64 add a package called "nixpkgs" to your sources.json. 65 ''; 66 67 # The actual fetching function. 68 fetch = pkgs: name: spec: 69 70 if ! builtins.hasAttr "type" spec then 71 abort "ERROR: niv spec ${name} does not have a 'type' attribute" 72 else if spec.type == "file" then fetch_file pkgs spec 73 else if spec.type == "tarball" then fetch_tarball pkgs spec 74 else if spec.type == "git" then fetch_git spec 75 else if spec.type == "builtin-tarball" then fetch_builtin-tarball spec 76 else if spec.type == "builtin-url" then fetch_builtin-url spec 77 else 78 abort "ERROR: niv spec ${name} has unknown type ${builtins.toJSON spec.type}"; 79 80 # Ports of functions for older nix versions 81 82 # a Nix version of mapAttrs if the built-in doesn't exist 83 mapAttrs = builtins.mapAttrs or ( 84 f: set: with builtins; 85 listToAttrs (map (attr: { name = attr; value = f attr set.${attr}; }) (attrNames set)) 86 ); 87 88 # fetchTarball version that is compatible between all the versions of Nix 89 builtins_fetchTarball = { url, sha256 }@attrs: 90 let 91 inherit (builtins) lessThan nixVersion fetchTarball; 92 in 93 if lessThan nixVersion "1.12" then 94 fetchTarball { inherit url; } 95 else 96 fetchTarball attrs; 97 98 # fetchurl version that is compatible between all the versions of Nix 99 builtins_fetchurl = { url, sha256 }@attrs: 100 let 101 inherit (builtins) lessThan nixVersion fetchurl; 102 in 103 if lessThan nixVersion "1.12" then 104 fetchurl { inherit url; } 105 else 106 fetchurl attrs; 107 108 # Create the final "sources" from the config 109 mkSources = config: 110 mapAttrs 111 ( 112 name: spec: 113 if builtins.hasAttr "outPath" spec 114 then abort 115 "The values in sources.json should not have an 'outPath' attribute" 116 else 117 spec // { outPath = fetch config.pkgs name spec; } 118 ) 119 config.sources; 120 121 # The "config" used by the fetchers 122 mkConfig = 123 { sourcesFile ? ./sources.json 124 , sources ? builtins.fromJSON (builtins.readFile sourcesFile) 125 , pkgs ? mkPkgs sources 126 }: rec { 127 # The sources, i.e. the attribute set of spec name to spec 128 inherit sources; 129 130 # The "pkgs" (evaluated nixpkgs) to use for e.g. non-builtin fetchers 131 inherit pkgs; 132 }; 133 in 134 mkSources (mkConfig { }) // { __functor = _: settings: mkSources (mkConfig settings); }