Add experimental Nix flake

1 files changed, 68 insertions, 0 deletions

diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..bedd3af
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,68 @@
+{
+  description = "Run the PostgreSQL server off a temporary data directory";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    flake-parts.url = "github:hercules-ci/flake-parts";
+  };
+
+  outputs =
+    inputs@{
+      self,
+      nixpkgs,
+      flake-parts,
+      ...
+    }:
+    flake-parts.lib.mkFlake { inherit inputs; } {
+      systems = [
+        "x86_64-linux"
+        "aarch64-linux"
+        "aarch64-darwin"
+      ];
+
+      perSystem =
+        {
+          self',
+          pkgs,
+          lib,
+          ...
+        }:
+        let
+          version = builtins.head (lib.splitString "\n" (builtins.readFile ./version));
+          revision = lib.toString (self.shortRev or self.dirtyShortRev or "unknown");
+        in
+        {
+          packages.default = self'.packages.temp-postgres;
+
+          packages.temp-postgres = pkgs.stdenv.mkDerivation {
+            name = "temp-postgres-${version}-${revision}";
+            version = "${version}-${revision}";
+            src = lib.cleanSource (
+              builtins.path {
+                path = ./.;
+                name = "temp-postgres";
+              }
+            );
+            nativeBuildInputs = [ pkgs.makeBinaryWrapper ];
+            installPhase = ''
+              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 : ${lib.makeBinPath [ pkgs.postgresql ]}
+            '';
+          };
+
+          formatter = pkgs.nixfmt-tree;
+
+          devShells.default = pkgs.mkShell {
+            nativeBuildInputs = with pkgs; [
+              postgresql
+            ];
+            shellHook = ''
+              export FLAKE=${self}
+            '';
+          };
+        };
+    };
+}