Merge #4252

4252: Mainnet CI prerequisites, round II (final) r=disassembler a=deepfire

1. `iohk-nix` bumped to version compatible with latest `cardano-byron-proxy`
1. `network-transport-tcp` bumped to version which fixes IntersectMBO/cardano-node#296
1. Convenience shells in some component dirs.

Co-authored-by: Kosyrev Serge <serge.kosyrev@iohk.io>
Co-authored-by: Alexander Vieth <aovieth@gmail.com>
Co-authored-by: Samuel Leathers <samuel.leathers@iohk.io>

crypto/shell.nix

@@ -0,0 +1,6 @@
+let
+  self = import ../. {};
+in (self.nix-tools.shellFor {
+  name = "cardano-sl-crypto";
+  packages = ps: [ ps.cardano-sl-crypto ps.cabal-install ];
+})

lib.nix

@@ -1,30 +1,23 @@
 let
-  # Allow overriding pinned nixpkgs for debugging purposes via cardano_pkgs
-  # Imports the iohk-nix library.
-  # The version can be overridden for debugging purposes by setting
-  # NIX_PATH=iohk_nix=/path/to/iohk-nix
-  iohkNix = import (
-    let try = builtins.tryEval <iohk_nix>;
-    in if try.success
-    then builtins.trace "using host <iohk_nix>" try.value
-    else
-      let
-        spec = builtins.fromJSON (builtins.readFile ./nix/iohk-nix-src.json);
-      in builtins.fetchTarball {
-        url = "${spec.url}/archive/${spec.rev}.tar.gz";
-        inherit (spec) sha256;
-      }) {};
-  # Gets the value of an environment variable, with a default if it's
-  # unset or empty.
+  sources = import ./nix/sources.nix;
+  pkgs' = import sources.nixpkgs {};
+  haskellNixJson = let
+    src = sources."haskell.nix";
+  in __toJSON {
+    inherit (sources."haskell.nix") rev sha256;
+    url = "https://github.com/${src.owner}/${src.repo}";
+  };
+  iohkNix = import sources.iohk-nix { haskellNixJsonOverride = pkgs'.writeText "haskell-nix.json" haskellNixJson; };
+  pkgs = iohkNix.pkgs;
+  lib = pkgs.lib;
+  niv = (import sources.niv {}).niv;
   maybeEnv = env: default:
     let
       result = builtins.getEnv env;
     in if result != ""
        then result
        else default;
 
-  pkgs = iohkNix.pkgs;
-  lib = pkgs.lib;
   environments = iohkNix.cardanoLib.environments // {
     demo = {
         confKey = "dev";
@@ -36,7 +29,7 @@ let
     (name: env: f (env // { inherit name; }))
     environments;
 in lib // iohkNix.cardanoLib // iohkNix // {
-  inherit environments forEnvironments;
+  inherit environments forEnvironments niv iohkNix;
   utf8LocaleSetting = ''
     export LC_ALL=en_GB.UTF-8
     export LANG=en_GB.UTF-8

networking/cardano-sl-networking.cabal

@@ -17,8 +17,6 @@ flag benchmarks
 Library
   exposed-modules:      Network.QDisc.Fair
 
-                        Network.Discovery.Abstract
-
                         Network.Broadcast.OutboundQueue
                         Network.Broadcast.OutboundQueue.Types
                         Network.Broadcast.OutboundQueue.ConcurrentMultiQueue

nix/sources.json

@@ -0,0 +1,62 @@
+{
+    "gitignore": {
+        "branch": "master",
+        "description": "Nix function for filtering local git sources",
+        "homepage": "",
+        "owner": "hercules-ci",
+        "repo": "gitignore",
+        "rev": "f9e996052b5af4032fe6150bba4a6fe4f7b9d698",
+        "sha256": "0jrh5ghisaqdd0vldbywags20m2cxpkbbk5jjjmwaw0gr8nhsafv",
+        "type": "tarball",
+        "url": "https://github.com/hercules-ci/gitignore/archive/f9e996052b5af4032fe6150bba4a6fe4f7b9d698.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    },
+    "haskell.nix": {
+        "branch": "master",
+        "description": "Alternative Haskell Infrastructure for Nixpkgs",
+        "homepage": "https://input-output-hk.github.io/haskell.nix",
+        "owner": "input-output-hk",
+        "repo": "haskell.nix",
+        "rev": "3ae2303b14bdebd00437b0e995af2d0eb21abafe",
+        "sha256": "0dk6541kwfyc5sp5h1vfk6zl4ghln4i2zqkaijbjwv8bnixnm6wl",
+        "type": "tarball",
+        "url": "https://github.com/input-output-hk/haskell.nix/archive/3ae2303b14bdebd00437b0e995af2d0eb21abafe.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    },
+    "iohk-nix": {
+        "branch": "master",
+        "description": "nix scripts shared across projects",
+        "homepage": null,
+        "owner": "input-output-hk",
+        "repo": "iohk-nix",
+        "rev": "f854c957a65295639d2062867552b65c7dc227a6",
+        "sha256": "1jl07ng2nx6lgj9rrqzl242r263505llzzxb592fn81h0dq6jx1r",
+        "type": "tarball",
+        "url": "https://github.com/input-output-hk/iohk-nix/archive/f854c957a65295639d2062867552b65c7dc227a6.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    },
+    "niv": {
+        "branch": "iohk",
+        "description": "Easy dependency management for Nix projects",
+        "homepage": "https://github.com/nmattia/niv",
+        "owner": "input-output-hk",
+        "repo": "niv",
+        "rev": "c25268460b72cea5b7294354ab019997530a6f3d",
+        "sha256": "1fgq1nkycm54f431h6wflh6rr7xsq3q2fq9drbgra2fnrsyn65ll",
+        "type": "tarball",
+        "url": "https://github.com/input-output-hk/niv/archive/c25268460b72cea5b7294354ab019997530a6f3d.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    },
+    "nixpkgs": {
+        "branch": "iohk-19.03",
+        "description": "Nix Packages collection",
+        "homepage": null,
+        "owner": "input-output-hk",
+        "repo": "nixpkgs",
+        "rev": "5bd4c4ea6804b54683ef2b802d970ae473e1b658",
+        "sha256": "12gah6y1lkkgvvdgswyzsqyvxvsvljn61vpy606sy37yfgkc1a63",
+        "type": "tarball",
+        "url": "https://github.com/input-output-hk/nixpkgs/archive/5bd4c4ea6804b54683ef2b802d970ae473e1b658.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    }
+}