Variable substitution for non-existent key #4594
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fivium-twilliams
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When Flux doesn't find a matching key for a variable substitution it just sets it to a empty value. Is there a way to detect when this has happened? It catches us out quite a bit as it's not immediately obvious. There are no errors or warnings logged that I can see.
For example, if the CLUSTER_NAME key exists but a user typos and references it as ${CLUSTER_NAM}, it silently substitutes it with nothing.
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