Multi-level variable replacements sometimes fail

[lukasjarosch]

Describe the bug If a variable is replaced with another variable, it is not always properly replaced.

For example: a key: foo.bar has the value test and another key bar.baz has the value ${foo:bar)_even_more Sometimes the key bar.baz will be test_even_more and sometimes ${foo:bar}_even_more.

This has to do with the order in which the variables are replaced. It is based on a range loop, which has a non-deterministic order.

After all variables have been replaced, it might be a good idea to scan for variables again, until no variables are discovered. Alternative approaches possible.

[lukasjarosch]

Additionally, this is even more confusing if calls are involved.

• target name is test
• foo.bar is %{alphanum:${target_name}}
• bar.baz is ${foo:bar}_BAZ
• bar.baz can be either test_BAZ or targetname_BAZ