fix(cli): tolerate empty Jikkou config file#769
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Treat an empty or whitespace-only ~/.jikkou/config file as if it did not exist, falling back to the default context instead of crashing with "Couldn't read configuration file". Malformed JSON still surfaces as an error.
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Summary
~/.jikkou/configexists but is empty (or whitespace-only). It now falls back to the default context instead of crashing withCouldn't read configuration file.ConfigurationContext.isExists()so every existing fallback branch handles the empty-file case the same way it handles the missing-file case. No changes to callers.Test plan
ConfigurationContextTestcovers: empty file, whitespace-only file, and malformed JSON (regression guard)./mvnw -pl cli -Dtest=ConfigurationContextTest test— 3/3 passing