Cleaned up niv sources

nix/sources.json

@@ -5,34 +5,22 @@
         "homepage": "https://github.com/nmattia/niv",
         "owner": "nmattia",
         "repo": "niv",
-        "rev": "c25268460b72cea5b7294354ab019997530a6f3d",
+        "rev": "f73bf8d584148677b01859677a63191c31911eae",
-        "sha256": "1fgq1nkycm54f431h6wflh6rr7xsq3q2fq9drbgra2fnrsyn65ll",
+        "sha256": "0jlmrx633jvqrqlyhlzpvdrnim128gc81q5psz2lpp2af8p8q9qs",
         "type": "tarball",
-        "url": "https://github.com/nmattia/niv/archive/c25268460b72cea5b7294354ab019997530a6f3d.tar.gz",
+        "url": "https://github.com/nmattia/niv/archive/f73bf8d584148677b01859677a63191c31911eae.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nixpkgs": {
-        "branch": "nixos-19.09",
+        "branch": "nixos-20.03",
         "description": "A read-only mirror of NixOS/nixpkgs tracking the released channels. Send issues and PRs to",
         "homepage": "https://github.com/NixOS/nixpkgs",
         "owner": "NixOS",
         "repo": "nixpkgs-channels",
-        "rev": "e1843646b04fb564abf6330a9432a76df3269d2f",
+        "rev": "5adf2a6c11646898742b0c08f7e94101620ba707",
-        "sha256": "1h1nv7bb6j0ccx8v0sz3gcwl1jqz3v2bb13ham0ky0rg9cvdv91h",
+        "sha256": "0wf7pwma2qyfak39b242mcq8z7cdj65sds7hcjxchy0448shapzi",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs-channels/archive/e1843646b04fb564abf6330a9432a76df3269d2f.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs-channels/archive/5adf2a6c11646898742b0c08f7e94101620ba707.tar.gz",
-        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
-    },
-    "ops-lib": {
-        "branch": "master",
-        "description": "NixOps deployment configuration library for IOHK devops ",
-        "homepage": null,
-        "owner": "input-output-hk",
-        "repo": "ops-lib",
-        "rev": "a280a769e911fbdc6e5c40794b15dd8570c39063",
-        "sha256": "085ad6mdccbpz8zndsz8nfm8r0zn2h7pp5r42wslqwm9x3c2h7nm",
-        "type": "tarball",
-        "url": "https://github.com/input-output-hk/ops-lib/archive/a280a769e911fbdc6e5c40794b15dd8570c39063.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }

nix/sources.nix

@@ -1,130 +1,134 @@
 # This file has been generated by Niv.
 
-# A record, from name to path, of the third-party packages
+let
-with rec
-{
-  pkgs =
-    if hasNixpkgsPath
-    then
-        if hasThisAsNixpkgsPath
-        then import (builtins_fetchTarball { inherit (sources_nixpkgs) url sha256; }) {}
-        else import <nixpkgs> {}
-    else
-        import (builtins_fetchTarball { inherit (sources_nixpkgs) url sha256; }) {};
 
-  sources_nixpkgs =
+  #
+  # 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 sources.nixpkgs
+      then sourcesNixpkgs
-    else abort
+      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.
           '';
 
-  sources_gitignore =
+  # The actual fetching function.
-    if builtins.hasAttr "gitignore" sources
+  fetch = pkgs: name: spec:
-    then sources.gitignore
-    else abort
-    ''
-        Please add "gitignore" to your sources.json:
-        niv add hercules-ci/gitignore
-    '';
 
-  inherit (import (builtins_fetchTarball { inherit (sources_gitignore) url sha256; }) {
+    if ! builtins.hasAttr "type" spec then
-    inherit (pkgs) lib;
+      abort "ERROR: niv spec ${name} does not have a 'type' attribute"
-  }) gitignoreSource;
+    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 =
+  builtins_fetchTarball = { url, sha256 }@attrs:
-      { url, sha256 ? null }@attrs:
     let
       inherit (builtins) lessThan nixVersion fetchTarball;
     in
-        if sha256 == null || lessThan nixVersion "1.12" then
+      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 =
+  builtins_fetchurl = { url, sha256 }@attrs:
-      { url, sha256 ? null }@attrs:
     let
       inherit (builtins) lessThan nixVersion fetchurl;
     in
-        if sha256 == null || lessThan nixVersion "1.12" then
+      if lessThan nixVersion "1.12" then
         fetchurl { inherit url; }
       else
         fetchurl attrs;
 
-  # A wrapper around pkgs.fetchzip that has inspectable arguments,
+  # Create the final "sources" from the config
-  # annoyingly this means we have to specify them
+  mkSources = config:
-  fetchzip = { url, sha256  ? null }@attrs: if sha256 == null
+    mapAttrs (
-    then builtins.fetchTarball { inherit url; }
+      name: spec:
-    else pkgs.fetchzip attrs;
-
-  # A wrapper around pkgs.fetchurl that has inspectable arguments,
-  # annoyingly this means we have to specify them
-  fetchurl = { url, sha256 }@attrs: pkgs.fetchurl attrs;
-
-  hasNixpkgsPath = (builtins.tryEval <nixpkgs>).success;
-  hasThisAsNixpkgsPath =
-    (builtins.tryEval <nixpkgs>).success && <nixpkgs> == ./.;
-
-  sources = builtins.fromJSON (builtins.readFile ./sources.json);
-
-  mapAttrs = builtins.mapAttrs or
-    (f: set: with builtins;
-      listToAttrs (map (attr: { name = attr; value = f attr set.${attr}; }) (attrNames set)));
-
-  # borrowed from nixpkgs
-  functionArgs = f: f.__functionArgs or (builtins.functionArgs f);
-  callFunctionWith = autoArgs: f: args:
-    let auto = builtins.intersectAttrs (functionArgs f) autoArgs;
-    in f (auto // args);
-
-  getFetcher = spec:
-    let fetcherName =
-      if builtins.hasAttr "type" spec
-      then builtins.getAttr "type" spec
-      else "builtin-tarball";
-    in builtins.getAttr fetcherName {
-      "tarball" = fetchzip;
-      "builtin-tarball" = builtins_fetchTarball;
-      "file" = fetchurl;
-      "builtin-url" = builtins_fetchurl;
-    };
-};
-# NOTE: spec must _not_ have an "outPath" attribute
-mapAttrs (name: spec:
         if builtins.hasAttr "outPath" spec
         then abort
           "The values in sources.json should not have an 'outPath' attribute"
         else
-    let
+          spec // { outPath = fetch config.pkgs name spec; }
-      host = if (name == "nixpkgs") then "custom_nixpkgs" else name;
+    ) config.sources;
-      tryFromPath = builtins.tryEval (builtins.findFile builtins.nixPath host);
+
-      defaultSpec = (if builtins.hasAttr "url" spec && builtins.hasAttr "sha256" spec
+  # The "config" used by the fetchers
-        then spec //
+  mkConfig =
-            { outPath = callFunctionWith spec (getFetcher spec) { }; }
+    { sourcesFile ? ./sources.json
-        else spec) // (if tryFromPath.success
+    , sources ? builtins.fromJSON (builtins.readFile sourcesFile)
-          then let path = tryFromPath.value;
+    , pkgs ? mkPkgs sources
-          in {
+    }: rec {
-            outPath = builtins.trace "using search host <${host}>" (
+      # The sources, i.e. the attribute set of spec name to spec
-              if pkgs.lib.hasPrefix "/nix/store" (builtins.toString path)
+      inherit sources;
-              then path else gitignoreSource path);
+
-          }
+      # The "pkgs" (evaluated nixpkgs) to use for e.g. non-builtin fetchers
-          else {});
+      inherit pkgs;
-    in if builtins.hasAttr "rev" spec && builtins.hasAttr "url" spec then
+    };
-      defaultSpec //
+in
-        { revOverride = rev: if (rev == null) then defaultSpec else
+mkSources (mkConfig {}) // { __functor = _: settings: mkSources (mkConfig settings); }
-              let
-                spec' = removeAttrs (spec // {
-                  rev = rev;
-                  url = builtins.replaceStrings [defaultSpec.rev] [rev] defaultSpec.url;
-                }) [ "sha256" ];
-              in
-                spec' //
-                { outPath = callFunctionWith spec' (getFetcher spec') { };  };
-        }
-      else defaultSpec
-  ) sources