From 24c5e41124c79aeb2a56b3d386c00ed16230a329 Mon Sep 17 00:00:00 2001
From: adisbladis <adisbladis@gmail.com>
Date: Tue, 14 Jun 2022 18:54:18 +0800
Subject: [PATCH] buildGoApplication: Introduce ldflags argument

Previously it was not possible to define multiple ldflags, since only
the last definition applies, and there's some quoting issues with
`buildFlagsArray`. With the new `ldflags` argument it's possible to do
this, e.g.

    ldflags = drv.ldflags or [] ++ [
      "-X main.Version=1.0"
    ]

can now properly append a flag without clearing all previous ldflags.

This is a port of https://github.com/NixOS/nixpkgs/commit/155ae682a5122960aed61724b4ed8c9711b53e99
---
 builder/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/builder/default.nix b/builder/default.nix
index 170d32b..2310fa5 100644
--- a/builder/default.nix
+++ b/builder/default.nix
@@ -260,7 +260,7 @@ let
             echo "$d" | grep -q "\(/_\|examples\|Godeps\|testdata\)" && return 0
             [ -n "$excludedPackages" ] && echo "$d" | grep -q "$excludedPackages" && return 0
             local OUT
-            if ! OUT="$(go $cmd $buildFlags "''${buildFlagsArray[@]}" -v -p $NIX_BUILD_CORES $d 2>&1)"; then
+            if ! OUT="$(go $cmd $buildFlags "''${buildFlagsArray[@]}" ''${ldflags:+-ldflags="$ldflags"} -v -p $NIX_BUILD_CORES $d 2>&1)"; then
               if echo "$OUT" | grep -qE 'imports .*?: no Go files in'; then
                 echo "$OUT" >&2
                 return 1