From 46a3d2ba70decd1931e13c190bfa49217e57718d Mon Sep 17 00:00:00 2001
From: Stefan Kreutz <mail@skreutz.com>
Date: Thu, 30 Apr 2026 10:10:46 +0200
Subject: Rewrite in async Rust

---
 flake.nix | 73 ++++++++++++++++++++++++++++++++++++++++++++-------------------
 1 file changed, 51 insertions(+), 22 deletions(-)

(limited to 'flake.nix')

diff --git a/flake.nix b/flake.nix
index 2076939..1ca32d2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -4,6 +4,7 @@
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
     flake-parts.url = "github:hercules-ci/flake-parts";
+    crane.url = "github:ipetkov/crane";
   };
 
   outputs =
@@ -11,6 +12,7 @@
       self,
       nixpkgs,
       flake-parts,
+      crane,
       ...
     }:
     flake-parts.lib.mkFlake { inherit inputs; } {
@@ -28,9 +30,35 @@
           ...
         }:
         let
-          version = builtins.head (lib.splitString "\n" (builtins.readFile ./version));
-          revision = lib.toString (self.shortRev or self.dirtyShortRev or "unknown");
-          mkPackage =
+          craneLib = crane.mkLib pkgs;
+          src = craneLib.cleanCargoSource ./.;
+          commonArgs = {
+            inherit src;
+            strictDeps = true;
+          };
+          cargoArtifacts = craneLib.buildDepsOnly commonArgs;
+          crate = craneLib.buildPackage (
+            commonArgs
+            // {
+              inherit cargoArtifacts;
+              nativeBuildInputs = [
+                pkgs.coreutils
+                pkgs.postgresql
+              ];
+              meta.mainProgram = "temp-postgres";
+              VERGEN_GIT_SHA =
+                if self ? shortRev then
+                  self.shortRev
+                else if self ? dirtyShortRev then
+                  lib.strings.removeSuffix "-dirty" self.dirtyShortRev
+                else
+                  "unknown";
+              VERGEN_GIT_DIRTY = if self ? dirtyShortRev then "true" else "false";
+            }
+          );
+          version = crate.version;
+          revision = self.shortRev or self.dirtyShortRev or "unknown";
+          wrap =
             {
               postgresql,
               suffix ? "",
@@ -38,19 +66,11 @@
             pkgs.stdenv.mkDerivation {
               name = "temp-postgres-${version}-${revision}${suffix}";
               version = "${version}-${revision}";
-              src = lib.cleanSource (
-                builtins.path {
-                  path = ./.;
-                  name = "temp-postgres";
-                }
-              );
               nativeBuildInputs = [ pkgs.makeBinaryWrapper ];
-              installPhase = ''
+              buildCommand = ''
                 mkdir -p $out/bin
-                cp temp-postgres.sh $out/bin/temp-postgres
-                mkdir -p $out/man/man1
-                cp temp-postgres.1 $out/man/man1/temp-postgres.1
-                wrapProgram $out/bin/temp-postgres --prefix PATH : ${lib.makeBinPath [ postgresql ]}
+                makeWrapper ${crate}/bin/temp-postgres $out/bin/temp-postgres \
+                  --prefix PATH : ${lib.makeBinPath [ postgresql ]}
               '';
             };
           postgresqlVersions = lib.mapAttrs' (
@@ -58,7 +78,7 @@
             let
               postgresqlVersion = lib.removePrefix "postgresql_" name;
             in
-            lib.nameValuePair "temp-postgres_${postgresqlVersion}" (mkPackage {
+            lib.nameValuePair "temp-postgres_${postgresqlVersion}" (wrap {
               postgresql = drv;
               suffix = "_${postgresqlVersion}";
             })
@@ -67,24 +87,33 @@
         {
           packages = {
             default = self'.packages.temp-postgres;
-            temp-postgres = mkPackage { postgresql = pkgs.postgresql; };
+            temp-postgres = wrap { postgresql = pkgs.postgresql; };
+            temp-postgres-unwrapped = crate;
           }
           // postgresqlVersions;
 
-          formatter = pkgs.nixfmt-tree;
-
           devShells.default = pkgs.mkShell {
             nativeBuildInputs = with pkgs; [
-              gnumake
-              gzip
-              mandoc
+              cargo
+              cargo-audit
+              cargo-deny
+              cargo-edit
+              clippy
+              just
+              nixfmt
               postgresql
-              shellcheck
+              rust-analyzer
+              rustc
+              rustfmt
+              taplo
+              watchexec
             ];
             shellHook = ''
               export FLAKE=${self}
             '';
           };
+
+          formatter = pkgs.nixfmt-tree;
         };
     };
 }
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