fix tagging

.github/workflows/build.yml

@@ -33,6 +33,11 @@ jobs:
 
           # Discover lanes: immediate subdirs under docker/
           mapfile -t ALL_LANES < <(find docker -mindepth 1 -maxdepth 1 -type d | sort)
+          # Also capture lane basenames (e.g. '7.4', 'nginx') for stable naming
+          ALL_NAMES=()
+          for _d in "${ALL_LANES[@]}"; do
+            ALL_NAMES+=("$(basename "${_d}")")
+          done
           if [[ ${#ALL_LANES[@]} -eq 0 ]]; then
             echo "No lanes found under docker/. Nothing to do."
             echo "should_build=false" >> $GITHUB_OUTPUT
@@ -64,17 +69,19 @@ jobs:
           echo "Changed files:"
           echo "$CHANGED"
 
-          # If workflow changed, rebuild all lanes
+          # If workflow changed, rebuild all lanes (use basenames)
           if grep -qx ".github/workflows/build.yml" <<< "$CHANGED"; then
             echo "Workflow changed; rebuilding all lanes."
-            TARGET_DIRS=("${ALL_LANES[@]}")
+            TARGET_DIRS=("${ALL_NAMES[@]}")
           else
             # Build only lanes with changes under their directories
             TARGET_DIRS=()
-            for lane in "${ALL_LANES[@]}"; do
+            for idx in "${!ALL_LANES[@]}"; do
+              lane_path="${ALL_LANES[$idx]}"
+              lane_name="${ALL_NAMES[$idx]}"
               # Any change directly under lane dir counts; include Dockerfile or subpaths
-              if grep -q "^${lane}/" <<< "$CHANGED"; then
-                TARGET_DIRS+=("$lane")
+              if grep -q "^${lane_path}/" <<< "$CHANGED"; then
+                TARGET_DIRS+=("${lane_name}")
               fi
             done
           fi
@@ -127,36 +134,40 @@ jobs:
         run: |
           set -euo pipefail
           DIR="${{ matrix.dir }}"
-          # Ensure DIR is set and use basename to derive a reliable NAME
+
+          # Fail fast on ambiguous/empty matrix.dir. We require a deterministic lane.
           if [[ -z "${DIR}" || "${DIR}" == "." ]]; then
-            echo "matrix.dir is empty or '.'; treating as repo root"
-            DIR='.'
+            echo "ERROR: Ambiguous lane: matrix.dir is empty or '.'."
+            echo "Provide a specific lane directory under docker/ (e.g. '7.4' or 'nginx')."
+            exit 1
           fi
+
           NAME="$(basename "${DIR}")"                  # e.g. '7.4' or 'nginx'
           SHA=${GITHUB_SHA::7}
 
-          # Decide repository and tag scheme:
-          # - nginx lane -> gitea.auvem.com/auvem/wordpress-nginx:stable
-          # - other lanes (assumed php variants) -> gitea.auvem.com/auvem/wordpress-php-fpm:<version>-stable
+          # Decide repository and tag scheme. Must be deterministic.
           if [[ "${NAME}" == "nginx" ]]; then
             IMAGE="gitea.auvem.com/auvem/wordpress-docker/nginx"
             TAG="stable"
           else
             IMAGE="gitea.auvem.com/auvem/wordpress-docker/php-fpm"
-            # Extract version like 7.4 or 8.1 from the lane name; otherwise use lane name
-            if [[ -n "${NAME}" && "${NAME}" =~ ([0-9]+\.[0-9]+) ]]; then
+            # Accept only lanes that encode a numeric version like '7.4' or '8'.
+            if [[ "${NAME}" =~ ^([0-9]+\.[0-9]+)$ ]]; then
               VERSION="${BASH_REMATCH[1]}"
               TAG="${VERSION}-stable"
-            elif [[ -n "${NAME}" && "${NAME}" =~ ([0-9]+) ]]; then
+            elif [[ "${NAME}" =~ ^([0-9]+)$ ]]; then
               VERSION="${BASH_REMATCH[1]}"
               TAG="${VERSION}-stable"
-            elif [[ -n "${NAME}" ]]; then
-              TAG="${NAME}-stable"
             else
-              TAG="stable"
+              echo "ERROR: Cannot deterministically derive a version tag from lane name '${NAME}'."
+              echo "Expected lane names like '7.4' or '8' for php-fpm lanes."
+              exit 1
             fi
           fi
 
+          # Debug output for name resolution
+          echo "Computed values: DIR='${DIR}', NAME='${NAME}', IMAGE='${IMAGE}', TAG='${TAG}', SHA='${SHA}'"
+
           echo "image=$IMAGE" >> $GITHUB_OUTPUT
           echo "tags=$IMAGE:${TAG},$IMAGE:git-${SHA}" >> $GITHUB_OUTPUT