postgresql_12: init at 12.0

Release notes: https://www.postgresql.org/docs/12/release-12.html

pkgs/servers/sql/postgresql/default.nix

@@ -81,8 +81,8 @@ let
     postInstall =
       ''
         moveToOutput "lib/pgxs" "$out" # looks strange, but not deleting it
-        moveToOutput "lib/libpgcommon.a" "$out"
-        moveToOutput "lib/libpgport.a" "$out"
+        moveToOutput "lib/libpgcommon*.a" "$out"
+        moveToOutput "lib/libpgport*.a" "$out"
         moveToOutput "lib/libecpg*" "$out"
 
         # Prevent a retained dependency on gcc-wrapper.
@@ -200,4 +200,12 @@ in self: {
     inherit self;
   };
 
+  postgresql_12 = self.callPackage generic {
+    version = "12.0";
+    psqlSchema = "12";
+    sha256 = "1ijm13gx1d9ai09n26nbdc77n9b8akh6pj21yy9vfn7p2mr3k8nd";
+    this = self.postgresql_12;
+    inherit self;
+  };
+
 }

pkgs/top-level/all-packages.nix

@@ -15080,6 +15080,7 @@ in
     postgresql_9_6
     postgresql_10
     postgresql_11
+    postgresql_12
   ;
   postgresql = postgresql_11.override { this = postgresql; };
   postgresqlPackages = recurseIntoAttrs postgresql.pkgs;