diff --git a/nix/sources.nix b/nix/sources.nix index 718ea6f..b796fff 100644 --- a/nix/sources.nix +++ b/nix/sources.nix @@ -6,83 +6,100 @@ let # The fetchers. fetch_ fetches specs of type . # - fetch_file = pkgs: spec: - if spec.builtin or true then - builtins_fetchurl { inherit (spec) url sha256; } - else - pkgs.fetchurl { inherit (spec) url sha256; }; + fetch_file = pkgs: name: spec: + let + name' = sanitizeName name + "-src"; + in + if spec.builtin or true then + builtins_fetchurl { inherit (spec) url sha256; name = name'; } + else + pkgs.fetchurl { inherit (spec) url sha256; name = name'; }; - fetch_tarball = pkgs: spec: - if spec.builtin or true then - builtins_fetchTarball { inherit (spec) url sha256; } - else - pkgs.fetchzip { inherit (spec) url sha256; }; + fetch_tarball = pkgs: name: spec: + let + name' = sanitizeName name + "-src"; + in + if spec.builtin or true then + builtins_fetchTarball { name = name'; inherit (spec) url sha256; } + else + pkgs.fetchzip { name = name'; inherit (spec) url sha256; }; - fetch_git = spec: - builtins.fetchGit { url = spec.repo; inherit (spec) rev ref; }; + fetch_git = name: spec: + let + ref = + if spec ? ref then spec.ref else + if spec ? branch then "refs/heads/${spec.branch}" else + if spec ? tag then "refs/tags/${spec.tag}" else + abort "In git source '${name}': Please specify `ref`, `tag` or `branch`!"; + in + builtins.fetchGit { url = spec.repo; inherit (spec) rev; inherit ref; }; - fetch_builtin-tarball = spec: - builtins.trace - '' - WARNING: - The niv type "builtin-tarball" will soon be deprecated. You should - instead use `builtin = true`. + fetch_local = spec: spec.path; - $ niv modify -a type=tarball -a builtin=true - '' - builtins_fetchTarball { inherit (spec) url sha256; }; + fetch_builtin-tarball = name: throw + ''[${name}] The niv type "builtin-tarball" is deprecated. You should instead use `builtin = true`. + $ niv modify ${name} -a type=tarball -a builtin=true''; - fetch_builtin-url = spec: - builtins.trace - '' - WARNING: - The niv type "builtin-url" will soon be deprecated. You should - instead use `builtin = true`. - - $ niv modify -a type=file -a builtin=true - '' - (builtins_fetchurl { inherit (spec) url sha256; }); + fetch_builtin-url = name: throw + ''[${name}] The niv type "builtin-url" will soon be deprecated. You should instead use `builtin = true`. + $ niv modify ${name} -a type=file -a builtin=true''; # # Various helpers # + # https://github.com/NixOS/nixpkgs/pull/83241/files#diff-c6f540a4f3bfa4b0e8b6bafd4cd54e8bR695 + sanitizeName = name: + ( + concatMapStrings (s: if builtins.isList s then "-" else s) + ( + builtins.split "[^[:alnum:]+._?=-]+" + ((x: builtins.elemAt (builtins.match "\\.*(.*)" x) 0) name) + ) + ); + # The set of packages used when specs are fetched using non-builtins. - mkPkgs = sources: - if hasNixpkgsPath - then - if hasThisAsNixpkgsPath - then import (builtins_fetchTarball { inherit (mkNixpkgs sources) url sha256; }) {} - else import {} - else - import (builtins_fetchTarball { inherit (mkNixpkgs sources) url sha256; }) {}; - - mkNixpkgs = sources: - if builtins.hasAttr "nixpkgs" sources - then sources.nixpkgs - else abort - '' - Please specify either (through -I or NIX_PATH=nixpkgs=...) or - add a package called "nixpkgs" to your sources.json. - ''; - - hasNixpkgsPath = (builtins.tryEval ).success; - hasThisAsNixpkgsPath = - (builtins.tryEval ).success && == ./.; + mkPkgs = sources: system: + let + sourcesNixpkgs = + import (builtins_fetchTarball { inherit (sources.nixpkgs) url sha256; }) { inherit system; }; + hasNixpkgsPath = builtins.any (x: x.prefix == "nixpkgs") builtins.nixPath; + hasThisAsNixpkgsPath = == ./.; + in + if builtins.hasAttr "nixpkgs" sources + then sourcesNixpkgs + else if hasNixpkgsPath && ! hasThisAsNixpkgsPath then + import {} + else + abort + '' + Please specify either (through -I or NIX_PATH=nixpkgs=...) or + add a package called "nixpkgs" to your sources.json. + ''; # The actual fetching function. fetch = pkgs: name: spec: if ! builtins.hasAttr "type" spec then abort "ERROR: niv spec ${name} does not have a 'type' attribute" - else if spec.type == "file" then fetch_file pkgs spec - else if spec.type == "tarball" then fetch_tarball pkgs spec - else if spec.type == "git" then fetch_git spec - else if spec.type == "builtin-tarball" then fetch_builtin-tarball spec - else if spec.type == "builtin-url" then fetch_builtin-url spec + else if spec.type == "file" then fetch_file pkgs name spec + else if spec.type == "tarball" then fetch_tarball pkgs name spec + else if spec.type == "git" then fetch_git name spec + else if spec.type == "local" then fetch_local spec + else if spec.type == "builtin-tarball" then fetch_builtin-tarball name + else if spec.type == "builtin-url" then fetch_builtin-url name else abort "ERROR: niv spec ${name} has unknown type ${builtins.toJSON spec.type}"; + # If the environment variable NIV_OVERRIDE_${name} is set, then use + # the path directly as opposed to the fetched source. + replace = name: drv: + let + saneName = stringAsChars (c: if isNull (builtins.match "[a-zA-Z0-9]" c) then "_" else c) name; + ersatz = builtins.getEnv "NIV_OVERRIDE_${saneName}"; + in + if ersatz == "" then drv else ersatz; + # Ports of functions for older nix versions # a Nix version of mapAttrs if the built-in doesn't exist @@ -91,23 +108,37 @@ let listToAttrs (map (attr: { name = attr; value = f attr set.${attr}; }) (attrNames set)) ); + # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/lists.nix#L295 + range = first: last: if first > last then [] else builtins.genList (n: first + n) (last - first + 1); + + # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L257 + stringToCharacters = s: map (p: builtins.substring p 1 s) (range 0 (builtins.stringLength s - 1)); + + # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L269 + stringAsChars = f: s: concatStrings (map f (stringToCharacters s)); + concatMapStrings = f: list: concatStrings (map f list); + concatStrings = builtins.concatStringsSep ""; + + # https://github.com/NixOS/nixpkgs/blob/8a9f58a375c401b96da862d969f66429def1d118/lib/attrsets.nix#L331 + optionalAttrs = cond: as: if cond then as else {}; + # fetchTarball version that is compatible between all the versions of Nix - builtins_fetchTarball = { url, sha256 }@attrs: + builtins_fetchTarball = { url, name ? null, sha256 }@attrs: let inherit (builtins) lessThan nixVersion fetchTarball; in if lessThan nixVersion "1.12" then - fetchTarball { inherit url; } + fetchTarball ({ inherit url; } // (optionalAttrs (!isNull name) { inherit name; })) else fetchTarball attrs; # fetchurl version that is compatible between all the versions of Nix - builtins_fetchurl = { url, sha256 }@attrs: + builtins_fetchurl = { url, name ? null, sha256 }@attrs: let inherit (builtins) lessThan nixVersion fetchurl; in if lessThan nixVersion "1.12" then - fetchurl { inherit url; } + fetchurl ({ inherit url; } // (optionalAttrs (!isNull name) { inherit name; })) else fetchurl attrs; @@ -119,18 +150,22 @@ let then abort "The values in sources.json should not have an 'outPath' attribute" else - spec // { outPath = fetch config.pkgs name spec; } + spec // { outPath = replace name (fetch config.pkgs name spec); } ) config.sources; # The "config" used by the fetchers mkConfig = - { sourcesFile ? ./sources.json + { sourcesFile ? if builtins.pathExists ./sources.json then ./sources.json else null + , sources ? if isNull sourcesFile then {} else builtins.fromJSON (builtins.readFile sourcesFile) + , system ? builtins.currentSystem + , pkgs ? mkPkgs sources system }: rec { # The sources, i.e. the attribute set of spec name to spec - sources = builtins.fromJSON (builtins.readFile sourcesFile); + inherit sources; + # The "pkgs" (evaluated nixpkgs) to use for e.g. non-builtin fetchers - pkgs = mkPkgs sources; + inherit pkgs; }; + in -mkSources (mkConfig {}) // - { __functor = _: settings: mkSources (mkConfig settings); } +mkSources (mkConfig {}) // { __functor = _: settings: mkSources (mkConfig settings); }