sources.nix (6670B)
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); }