Revert "Fix lint issues and improve test suite resilience"

This reverts commit 90d44bd3bc.

tests/test_templates.sh

@@ -11,20 +11,27 @@ gomplate="${GOMPLATE_BIN:-gomplate}"
 # Ensure gomplate is installed before running template tests
 require_gomplate() {
     if ! command -v "$gomplate" &>/dev/null; then
-        echo "  SKIP  gomplate not found (install from https://github.com/hairyhenderson/gomplate or set GOMPLATE_BIN)"
-        exit 0
+        echo "gomplate not found. Install it from https://github.com/hairyhenderson/gomplate"
+        echo "or set GOMPLATE_BIN env var."
+        exit 1
     fi
 }
 
+render() {
+    local tmpl=$1 envfile=$2
+    "$gomplate" \
+        --template t="$tmpl" \
+        --context "_=fmt:%s" \
+        --datasource "env=env://?$envfile" \
+        -f "$tmpl" 2>/dev/null
+}
+
 # Render a template by exporting env vars directly
 # This avoids gomplate datasource quirks with .env files
 render_via_env() {
     local tmpl=$1 envfile=$2
-    set -a
-    # shellcheck disable=1090,1091
-    . "$envfile"
-    set +a
-    "$gomplate" -f "$tmpl" 2>/dev/null
+    # shellcheck disable=2046
+    env $(xargs < "$envfile") "$gomplate" -f "$tmpl" 2>/dev/null
 }
 
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