From c34735e6ffcf1e74ec8d955f942e7e9f339eae77 Mon Sep 17 00:00:00 2001
From: Elijah Duffy <enduffy2014@outlook.com>
Date: Sun, 7 Dec 2025 19:00:18 -0800
Subject: [PATCH] filter build targets to require a dockerfile

---
 .github/workflows/build.yml | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index dd2b44d..b64e9c8 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -33,6 +33,18 @@ jobs:
 
           # Discover lanes: immediate subdirs under docker/
           mapfile -t ALL_LANES < <(find docker -mindepth 1 -maxdepth 1 -type d | sort)
+          # Filter to only directories that contain a Dockerfile (real lanes)
+          FILTERED_LANES=()
+          SKIPPED_LANES=()
+          for _d in "${ALL_LANES[@]}"; do
+            if [[ -f "${_d}/Dockerfile" ]]; then
+              FILTERED_LANES+=("${_d}")
+            else
+              SKIPPED_LANES+=("${_d}")
+            fi
+          done
+          ALL_LANES=("${FILTERED_LANES[@]}")
+
           # Also capture lane basenames (e.g. '7.4', 'nginx') for stable naming
           ALL_NAMES=()
           for _d in "${ALL_LANES[@]}"; do