summaryrefslogtreecommitdiff
path: root/nix/sources.nix
diff options
context:
space:
mode:
Diffstat (limited to 'nix/sources.nix')
-rw-r--r--nix/sources.nix134
1 files changed, 134 insertions, 0 deletions
diff --git a/nix/sources.nix b/nix/sources.nix
new file mode 100644
index 0000000..8a725cb
--- /dev/null
+++ b/nix/sources.nix
@@ -0,0 +1,134 @@
+# This file has been generated by Niv.
+
+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_tarball = pkgs: spec:
+ if spec.builtin or true then
+ builtins_fetchTarball { inherit (spec) url sha256; }
+ else
+ pkgs.fetchzip { inherit (spec) url sha256; };
+
+ fetch_git = spec:
+ builtins.fetchGit { url = spec.repo; inherit (spec) rev ref; };
+
+ fetch_builtin-tarball = spec:
+ builtins.trace
+ ''
+ WARNING:
+ The niv type "builtin-tarball" will soon be deprecated. You should
+ instead use `builtin = true`.
+
+ $ niv modify <package> -a type=tarball -a builtin=true
+ ''
+ builtins_fetchTarball { inherit (spec) url sha256; };
+
+ fetch_builtin-url = spec:
+ builtins.trace
+ ''
+ WARNING:
+ The niv type "builtin-url" will soon be deprecated. You should
+ instead use `builtin = true`.
+
+ $ niv modify <package> -a type=file -a builtin=true
+ ''
+ (builtins_fetchurl { inherit (spec) url sha256; });
+
+ #
+ # Various helpers
+ #
+
+ # The set of packages used when specs are fetched using non-builtins.
+ mkPkgs = sources:
+ let
+ sourcesNixpkgs =
+ import (builtins_fetchTarball { inherit (sources.nixpkgs) url sha256; }) {};
+ hasNixpkgsPath = builtins.any (x: x.prefix == "nixpkgs") builtins.nixPath;
+ hasThisAsNixpkgsPath = <nixpkgs> == ./.;
+ in
+ if builtins.hasAttr "nixpkgs" sources
+ then sourcesNixpkgs
+ else if hasNixpkgsPath && ! hasThisAsNixpkgsPath then
+ import <nixpkgs> {}
+ else
+ abort
+ ''
+ Please specify either <nixpkgs> (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
+ abort "ERROR: niv spec ${name} has unknown type ${builtins.toJSON spec.type}";
+
+ # Ports of functions for older nix versions
+
+ # a Nix version of mapAttrs if the built-in doesn't exist
+ mapAttrs = builtins.mapAttrs or (
+ f: set: with builtins;
+ listToAttrs (map (attr: { name = attr; value = f attr set.${attr}; }) (attrNames set))
+ );
+
+ # fetchTarball version that is compatible between all the versions of Nix
+ builtins_fetchTarball = { url, sha256 }@attrs:
+ let
+ inherit (builtins) lessThan nixVersion fetchTarball;
+ in
+ if lessThan nixVersion "1.12" then
+ fetchTarball { inherit url; }
+ else
+ fetchTarball attrs;
+
+ # fetchurl version that is compatible between all the versions of Nix
+ builtins_fetchurl = { url, sha256 }@attrs:
+ let
+ inherit (builtins) lessThan nixVersion fetchurl;
+ in
+ if lessThan nixVersion "1.12" then
+ fetchurl { inherit url; }
+ else
+ fetchurl attrs;
+
+ # Create the final "sources" from the config
+ mkSources = config:
+ mapAttrs (
+ name: spec:
+ if builtins.hasAttr "outPath" spec
+ then abort
+ "The values in sources.json should not have an 'outPath' attribute"
+ else
+ spec // { outPath = 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
+ }: rec {
+ # The sources, i.e. the attribute set of spec name to spec
+ inherit sources;
+
+ # The "pkgs" (evaluated nixpkgs) to use for e.g. non-builtin fetchers
+ inherit pkgs;
+ };
+in
+mkSources (mkConfig {}) // { __functor = _: settings: mkSources (mkConfig settings); }