chain gateway build fix

ci/scripts/common/ensure_env_version.sh

@@ -3,30 +3,38 @@ set -eu
 
 echo "[fx-pipeline] rewriting .env.version" >&2
 
+if [ -f ./.env.version ]; then
+  # shellcheck disable=SC1091
+  . ./.env.version || true
+fi
+
 if [ -n "${WOODPECKER_COMMIT:-}" ]; then
   GIT_REV="$(printf '%s' "${WOODPECKER_COMMIT}" | cut -c1-7)"
 elif command -v git >/dev/null 2>&1; then
-  GIT_REV="$(git rev-parse --short HEAD 2>/dev/null || echo dev)"
-else
-  GIT_REV="dev"
+  GIT_REV="$(git rev-parse --short HEAD 2>/dev/null || true)"
 fi
+: "${GIT_REV:=dev}"
 
 if [ -n "${WOODPECKER_BRANCH:-}" ]; then
   BUILD_BRANCH="${WOODPECKER_BRANCH}"
 elif command -v git >/dev/null 2>&1; then
-  BUILD_BRANCH="$(git rev-parse --abbrev-ref HEAD 2>/dev/null || echo local)"
-else
-  BUILD_BRANCH="local"
+  BUILD_BRANCH="$(git rev-parse --abbrev-ref HEAD 2>/dev/null || true)"
 fi
+: "${BUILD_BRANCH:=local}"
 
 if [ -f version ]; then
-  APP_V="$(cat version 2>/dev/null || echo dev)"
-else
-  APP_V="dev"
+  APP_V="$(cat version 2>/dev/null || true)"
+fi
+: "${APP_V:=dev}"
+
+if [ -z "${BUILD_DATE:-}" ]; then
+  BUILD_DATE="$(date -u +%Y-%m-%dT%H:%M:%SZ 2>/dev/null || echo unknown)"
 fi
 
-BUILD_DATE="$(date -u +%Y-%m-%dT%H:%M:%SZ 2>/dev/null || echo unknown)"
-BUILD_USER="${WOODPECKER_MACHINE:-woodpecker}"
+: "${WOODPECKER_MACHINE:=woodpecker}"
+if [ -z "${BUILD_USER:-}" ]; then
+  BUILD_USER="${WOODPECKER_MACHINE}"
+fi
 
 cat > .env.version <<EOF
 GIT_REV=${GIT_REV}