Update nix (haskell#1699)

* Update nix

* genChangelogs -> gen-hls-changelogs

Author: berberman

docs/releases.md

@@ -11,6 +11,7 @@ when added to the path.
 ## Minimal checklist
 
 * [ ] generate the list of pull requests finished since the last release using the [haskell script](https://github.com/haskell/haskell-language-server/blob/master/GenChangelogs.hs) in the project root.
+  Nix users should run command `gen-hls-changelogs` (a wrapper of the script) in nix-shell instead.
 * [ ] add that list to the actual [Changelog](https://github.com/haskell/haskell-language-server/blob/master/ChangeLog.md) with a description of the release.
 * [ ] bump up versions of changed packages. All are optional but [haskell-language-server itself](https://github.com/haskell/haskell-language-server/blob/master/haskell-language-server.cabal).
 * [ ] create the tag and make an initial prerelease to trigger the ci workflow (see details below)

nix/default.nix

@@ -48,16 +48,20 @@ let
         inherit gitignoreSource;
         inherit ourSources;
 
-        # tracy-0.7.6 is broken on macOS
-        tracy = pkgs.tracy.overrideAttrs (_old: rec {
-          version = "0.7.5";
-          src = pkgs.fetchFromGitHub {
-            owner = "wolfpld";
-            repo = "tracy";
-            rev = "v${version}";
-            sha256 = "0qfb30k6a8vi8vn65vv927wd9nynwwvc9crbmi7a55kp20hzg06r";
-          };
-        });
+        gen-hls-changelogs = with pkgs;
+          let myGHC = haskellPackages.ghcWithPackages (p: with p; [ github ]);
+          in runCommand "gen-hls-changelogs" {
+              passAsFile = [ "text" ];
+              preferLocalBuild = true;
+              allowSubstitutes = false;
+              buildInputs = [ git myGHC ];
+            } ''
+              dest=$out/bin/gen-hls-changelogs
+              mkdir -p $out/bin
+              echo "#!${runtimeShell}" >> $dest
+              echo "${myGHC}/bin/runghc ${../GenChangelogs.hs}" >> $dest
+              chmod +x $dest
+            '';
 
         ourHaskell = pkgs.haskell // {
             packages = pkgs.haskell.packages // {

nix/sources.json

@@ -29,10 +29,10 @@
         "homepage": "https://github.com/NixOS/nixpkgs",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "c5147860e23ed75ce9d40298c66b416c00be1167",
-        "sha256": "104mw4rfbzyrfkxq468dlk38drrjx92dgyvkazgci67a6cx3n6nx",
+        "rev": "6fc2b7ecc2a167ce6a6902d5417daf1fa5cac777",
+        "sha256": "0bcf8yr8scgk7kdjhbrvv7l1d1yv8fnb1d7k3vgnd9qrjnl2fbcf",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/c5147860e23ed75ce9d40298c66b416c00be1167.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/6fc2b7ecc2a167ce6a6902d5417daf1fa5cac777.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }

shell.nix

@@ -37,6 +37,8 @@ haskellPackagesForProject.shellFor {
     capstone
     tracy
 
+    gen-hls-changelogs
+
     haskellPackages.cabal-install
     haskellPackages.hlint
     haskellPackages.ormolu