ci: fix warnings about $K8S_USER (#1133)

A follow-up to a103361

Author: michalrus

.envrc

@@ -5,8 +5,8 @@ source "$(
 	fetchurl "https://raw.githubusercontent.com/paisano-nix/direnv/main/lib" "sha256-IgQhKK7UHL1AfCUntJO2KCaIDJQotRnK2qC4Daxk+wI="
 )"
 
-use envreload //local/envs/main
-
 export K8S_USER=eks-devs
 
+use envreload //local/envs/main
+
 source_env_if_exists .envrc.local

.github/workflows/std.yml

@@ -151,6 +151,8 @@ jobs:
           ssh_known_hosts_entry: ${{ env.DISCOVERY_KNOWN_HOSTS_ENTRY }}
       - name: Generate the Diff
         run: |
+          echo 'export K8S_USER=eks-devs' >.envrc.local
+
           nix develop .#x86_64-linux.local.envs.main -L --command bash -c '
             set -euo pipefail
 
@@ -217,6 +219,8 @@ jobs:
           ssh_known_hosts_entry: ${{ env.DISCOVERY_KNOWN_HOSTS_ENTRY }}
       - name: Deploy to K8s
         run: |
+          echo 'export K8S_USER=eks-devs' >.envrc.local
+
           nix develop .#x86_64-linux.local.envs.main -L --command bash -c '
             set -euo pipefail
 

nix/local/envs.nix

@@ -57,7 +57,7 @@ in {
     ];
 
     devshell.startup.setup.text = ''
-      source $PRJ_ROOT/.envrc.local
+      [ -e $PRJ_ROOT/.envrc.local ] && source $PRJ_ROOT/.envrc.local
       kubectl config use-context $K8S_USER
       chmod 600 $PRJ_ROOT/.kube/*
     '';