Fix: using %zu instead of %lu on size_t

Some systems use a 64-bit size_t data type, even though unsigned long is only
 32 bits. It's best to use the specialized format specifier %zu instead of
 assuming that size_t is the same as unsigned long.

.docker/prod.Dockerfile

@@ -8,7 +8,7 @@ ARG DEBIAN_FRONTEND=noninteractive
 COPY . /source
 RUN sh /source/.github/install-dependencies.sh
 RUN cmake -DCMAKE_BUILD_TYPE=Release -B/build /source
-RUN DESTDIR=/install cmake --build /build -- install 
+RUN DESTDIR=/install cmake --build /build -- install
 
 FROM debian:stable-slim
 

.github/workflows/container.yml

@@ -40,7 +40,7 @@ jobs:
             # set this tag to latest and stable
             echo "IS_LATEST_TAG=true" >> $GITHUB_ENV
           fi
-      - name: Setup container meta information
+      - name: 'Setup meta information (IS_VERSION_TAG: ${{ env.IS_VERSION_TAG }}, IS_LATEST_TAG: ${{ env.IS_LATEST_TAG }} )'
         id: meta
         uses: docker/metadata-action@v4
         with:

osp/osp.c

@@ -145,7 +145,7 @@ osp_connection_new (const char *host, int port, const char *cacert,
 
       if (strlen (host) >= sizeof (addr.sun_path))
         {
-          g_warning ("%s: given host / socket path too long (%lu > %lu bytes)",
+          g_warning ("%s: given host / socket path too long (%zu > %zu bytes)",
                      __func__, strlen (host), sizeof (addr.sun_path) - 1);
           return NULL;
         }