Summary:
Hermes is enabled by default. We set `USE_HERMES` envvar to `false` to explicilty disable Hermes. The only valid way to check it would be to compare it against `false`. Everything else will produce invalid results if `USE_HERMES` is not defined. For example `$USE_HERMES != true` will turn into `'' != true`, which evaluates to `true`.
Due to this bug source maps were not generated by default.
Changelog:
[iOS][Fixed] - USE_HERMES envvar check fixed in react-native-xcode.sh. Now source maps are generated by default.
Reviewed By: cipolleschi
Differential Revision: D38571971
fbshipit-source-id: bc6b505c225c56d62ee773b401b66d821965e106
Dmitry Rykun
03de19745e