diff options
Diffstat (limited to 'Biz/Bild/Sources.nix')
| -rw-r--r-- | Biz/Bild/Sources.nix | 80 |
1 files changed, 58 insertions, 22 deletions
diff --git a/Biz/Bild/Sources.nix b/Biz/Bild/Sources.nix index 8da4974..1938409 100644 --- a/Biz/Bild/Sources.nix +++ b/Biz/Bild/Sources.nix @@ -6,25 +6,33 @@ let # The fetchers. fetch_<type> fetches specs of type <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: name: spec: let - ok = str: ! builtins.isNull (builtins.match "[a-zA-Z0-9+-._?=]" str); - # sanitize the name, though nix will still fail if name starts with period - name' = stringAsChars (x: if ! ok x then "-" else x) "${name}-src"; + name' = sanitizeName name + "-src"; in if spec.builtin or true then builtins_fetchTarball { name = name'; inherit (spec) url sha256; } else pkgs.fetchzip { name = name'; inherit (spec) url sha256; }; - fetch_git = spec: - builtins.fetchGit { url = spec.repo; inherit (spec) rev ref; }; + fetch_git = name: spec: + let + ref = + if spec ? ref then spec.ref else + if spec ? branch then "refs/heads/${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_local = spec: spec.path; @@ -40,11 +48,21 @@ let # 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: + mkPkgs = sources: system: let sourcesNixpkgs = - import (builtins_fetchTarball { inherit (sources.nixpkgs) url sha256; }) {}; + import (builtins_fetchTarball { inherit (sources.nixpkgs) url sha256; }) { inherit system; }; hasNixpkgsPath = builtins.any (x: x.prefix == "nixpkgs") builtins.nixPath; hasThisAsNixpkgsPath = <nixpkgs> == ./.; in @@ -64,15 +82,27 @@ let 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 == "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 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_${saneName}"; + in + if ersatz == "" then drv else + # this turns the string into an actual Nix path (for both absolute and + # relative paths) + if builtins.substring 0 1 ersatz == "/" then /. + ersatz else /. + builtins.getEnv "PWD" + "/${ersatz}"; + # Ports of functions for older nix versions # a Nix version of mapAttrs if the built-in doesn't exist @@ -89,25 +119,29 @@ let # 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, name, sha256 }@attrs: + builtins_fetchTarball = { url, name ? null, sha256 }@attrs: let inherit (builtins) lessThan nixVersion fetchTarball; in if lessThan nixVersion "1.12" then - fetchTarball { inherit name 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; @@ -119,14 +153,15 @@ 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 - , sources ? builtins.fromJSON (builtins.readFile sourcesFile) - , pkgs ? mkPkgs sources + { 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 inherit sources; @@ -134,5 +169,6 @@ let # The "pkgs" (evaluated nixpkgs) to use for e.g. non-builtin fetchers inherit pkgs; }; + in mkSources (mkConfig {}) // { __functor = _: settings: mkSources (mkConfig settings); } |