Move set-git-rev to the top level flake

This allows to retain direct access to haskell.nix derivations through
the project flake output.

Author: andreabedini

flake.nix

@@ -85,9 +85,8 @@
     }@input:
     let
       inherit (nixpkgs) lib;
-      inherit (lib) head systems mapAttrs recursiveUpdate mkDefault
-        getAttrs optionalAttrs nameValuePair attrNames;
-      inherit (utils.lib) eachSystem mkApp flattenTree;
+      inherit (lib) head mapAttrs recursiveUpdate optionalAttrs;
+      inherit (utils.lib) eachSystem flattenTree;
       inherit (iohkNix.lib) prefixNamesWith;
       removeRecurse = lib.filterAttrsRecursive (n: _: n != "recurseForDerivations");
 
@@ -122,12 +121,16 @@
       ] ++ (import ops-lib.outPath {}).overlays;
 
       collectExes = project:
-        let inherit (project.pkgs.stdenv) hostPlatform;
-        in project.exes // (with project.hsPkgs; {
-          inherit (ouroboros-consensus-cardano.components.exes) db-analyser db-synthesizer db-truncater;
+        let set-git-rev = import ./nix/set-git-rev.nix { inherit (project) pkgs; };
+        in
+        # take all executables from the project local packages
+        project.exes // (with project.hsPkgs; {
+          # add some executables from other relevant packages
           inherit (bech32.components.exes) bech32;
-          inherit (cardano-cli.components.exes) cardano-cli;
-        } // lib.optionalAttrs hostPlatform.isUnix {
+          inherit (ouroboros-consensus-cardano.components.exes) db-analyser db-synthesizer db-truncater;
+          # add cardano-node and cardano-cli with their git revision stamp
+          cardano-node = set-git-rev project.exes.cardano-node;
+          cardano-cli = set-git-rev cardano-cli.components.exes.cardano-cli;
         });
 
       mkCardanoNodePackages = project: (collectExes project) // {
@@ -143,7 +146,10 @@
         project = pkgs.cardanoNodeProject;
 
         # This is used by `nix develop .` to open a devShell
-        devShells = let shell = import ./shell.nix { inherit pkgs customConfig cardano-mainnet-mirror; }; in {
+        devShells =
+        let
+          shell = import ./shell.nix { inherit pkgs customConfig cardano-mainnet-mirror; };
+        in {
           inherit (shell) devops workbench-shell;
           default = shell.dev;
           cluster = shell;
@@ -201,12 +207,12 @@
                     backendName = "supervisor";
                     useCabalRun = false;
                     cardano-node-rev =
-                      if __hasAttr "rev" self
+                      if builtins.hasAttr "rev" self
                       then pkgs.gitrev
                       else throw "Cannot get git revision of 'cardano-node', unclean checkout?";
                   }).workbench-profile-run;
           in
-          rec {
+          {
             "dockerImage/node" = pkgs.dockerImage;
             "dockerImage/submit-api" = pkgs.submitApiDockerImage;
 

nix/haskell.nix

@@ -319,7 +319,7 @@ in
 project.appendOverlays (with haskellLib.projectOverlays; [
   projectComponents
   (final: prev:
-    let inherit (final.pkgs) lib gitrev; in {
+    let inherit (final.pkgs) lib; in {
       profiled = final.appendModule {
         modules = [{
           enableLibraryProfiling = true;
@@ -361,27 +361,16 @@ project.appendOverlays (with haskellLib.projectOverlays; [
         (path: value:
           if (lib.isAttrs value) then
             lib.recursiveUpdate
-              (if lib.elemAt path 2 == "exes" && lib.elem (lib.elemAt path 3) [ "cardano-node" "cardano-cli" ] then
-              # Stamp executables with version info.
-              # Done outside the haskell.nix derivation to avoid compilation and tests depending on rev.
-                final.pkgs.buildPackages.runCommand value.name
-                  {
-                    inherit (value) exeName exePath meta passthru;
-                  } ''
-                  mkdir -p $out
-                  cp --no-preserve=timestamps --recursive ${value}/* $out/
-                  chmod -R +w $out/bin
-                  ${final.pkgs.pkgsBuildBuild.haskellBuildUtils}/bin/set-git-rev "${gitrev}" $out/bin/*
-                ''
-              else value)
+              value
               {
                 # Also add convenient passthru to some alternative compilation configurations:
                 passthru = {
                   profiled = lib.getAttrFromPath path final.profiled.hsPkgs;
                   asserted = lib.getAttrFromPath path final.asserted.hsPkgs;
                   eventlogged = lib.getAttrFromPath path final.eventlogged.hsPkgs;
                 };
-              } else value)
+              }
+          else value)
         prev.hsPkgs;
     })
 ])

nix/set-git-rev.nix

@@ -0,0 +1,11 @@
+{ pkgs }:
+drv:
+pkgs.buildPackages.runCommand drv.name
+{
+  inherit (drv) exeName exePath meta passthru;
+} ''
+  mkdir -p $out
+  cp --no-preserve=timestamps --recursive ${drv}/* $out/
+  chmod -R +w $out/bin
+  ${pkgs.pkgsBuildBuild.haskellBuildUtils}/bin/set-git-rev "${pkgs.gitrev}" $out/bin/*
+''