nix(refactor): Move withPostgresqlVersions and withAllVersions to new withTools

nix/withtools.nix

@@ -0,0 +1,80 @@
+{ buildEnv
+, checkedShellScript
+, lib
+, postgresqlVersions
+}:
+let
+  # Wrap the `test/with_tmp_db` script with the required dependencies from Nix.
+  withTmpDb =
+    { name, postgresql }:
+    checkedShellScript
+      {
+        name = "postgrest-with-${name}";
+        docs = "Run the given command in a temporary database with ${name}";
+        inRootDir = true;
+        redirectTixFiles = false;
+      }
+      ''
+        # avoid starting multiple layers of with_tmp_db
+        if test ! -v PGRST_DB_URI; then
+          export PATH=${postgresql}/bin:"$PATH"
+
+          exec test/with_tmp_db "$@"
+        else
+          "$@"
+        fi
+      '';
+
+  # Helper script for running a command against all PostgreSQL versions.
+  withAll =
+    let
+      runners =
+        builtins.map
+          (pg:
+            ''
+              cat << EOF
+
+              Running against ${pg.name}...
+
+              EOF
+
+              trap 'echo "Failed on ${pg.name}"' exit
+
+              ${withTmpDb pg} "$@"
+
+              trap "" exit
+
+              cat << EOF
+
+              Done running against ${pg.name}.
+
+              EOF
+            '')
+          postgresqlVersions;
+    in
+    checkedShellScript
+      {
+        name = "postgrest-with-all";
+        docs = "Run command against all supported PostgreSQL versions.";
+        inRootDir = true;
+      }
+      (lib.concatStringsSep "\n\n" runners);
+
+  # Create a `postgrest-with-postgresql-` for each PostgreSQL version
+  withVersions = builtins.map withTmpDb postgresqlVersions;
+
+in
+buildEnv
+  {
+    name =
+      "postgrest-with";
+
+    paths =
+      [
+        withAll.bin
+      ] ++ (builtins.map (v: v.bin) withVersions);
+  }
+  # make withTools.latest available for other nix files
+  // {
+  latest = withTmpDb (builtins.head postgresqlVersions);
+}