.github/workflows/01-make-dist.yml: introduce "make distcheck-completeness" to verify that our dist archives exactly reproduce themselves [networkupstools#2829]

Signed-off-by: Jim Klimov <jimklimov+nut@gmail.com>

Author: jimklimov

.github/workflows/01-make-dist.yml

@@ -215,6 +215,16 @@ jobs:
         ( ${{env.compiler}} ; echo "=== CC: $CC => `command -v $CC` =>" ; $CC --version ; echo "=== CXX: $CXX => `command -v $CXX` =>" ; $CXX --version ) || true
         make -s -j 8 distcheck
 
+    - name: NUT CI Build to verify "dist" tarball build self-reproducibility
+      env:
+        compiler: 'CC=gcc CXX=g++'
+      run: |
+        PATH="/usr/lib/ccache:$PATH" ; export PATH
+        CCACHE_COMPRESS=true; export CCACHE_COMPRESS
+        ccache --version || true
+        ( ${{env.compiler}} ; echo "=== CC: $CC => `command -v $CC` =>" ; $CC --version ; echo "=== CXX: $CXX => `command -v $CXX` =>" ; $CXX --version ) || true
+        make -s -j 8 distcheck-completeness
+
     - name: CCache stats after distcheck
       run: ccache -sv || ccache -s || echo "FAILED to read ccache info, oh well"