bazel: move .bazelrc back to the repo root (#596)

It turns out that bazel still loads the .bazelrc file even if an
explicit --bazelrc argument is passed to it.

build.ps1

@@ -12,7 +12,7 @@ function bazel() {
     $global:lastexitcode = 0
     $backupErrorActionPreference = $script:ErrorActionPreference
     $script:ErrorActionPreference = "Continue"
-    & bazel.exe --bazelrc=.\nix\bazelrc @args 2>&1 | %{ "$_" }
+    & bazel.exe @args 2>&1 | %{ "$_" }
     $script:ErrorActionPreference = $backupErrorActionPreference
     if ($global:lastexitcode -ne 0 -And $args[0] -ne "shutdown") {
         Write-Output "<< bazel $args (failed, exit code: $global:lastexitcode)"

nix/packages.nix

@@ -193,6 +193,8 @@ in rec {
 
     # Build tools
 
+    # wrap the .bazelrc to automate the configuration of
+    # `build --config <kernel>`
     bazelrc =
       let
         kernel =
@@ -202,7 +204,6 @@ in rec {
       in
         pkgs.writeText "daml-bazelrc" ''
           build --config ${kernel}
-          ${builtins.readFile ./bazelrc}
         '';
 
     bazel = pkgs.writeScriptBin "bazel" (''