``` git grep -lz 'Copyright.txt or https://cmake.org/licensing ' | while IFS= read -r -d $'\0' f ; do sed -i '/Copyright.txt or https:\/\/cmake.org\/licensing / { s/Copyright.txt/LICENSE.rst/ }' "$f" ; done ```
This presents value semantics for a stack of constant values. Internally it shares ownership to avoid copies. Previously this was implemented by `cmListFileBacktrace` explicitly, but the approach can be re-used for other kinds of stacks.