5 lines
336 B
Markdown
5 lines
336 B
Markdown
Added a new builtin function `getenv` in the rule engine and variform expression to access the environment variables with below limitations.
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- Prefix `EMQXVAR_` is added before reading from OS environment variables. i.e. `getenv('FOO_BAR')` is to read `EMQXVAR_FOO_BAR`.
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- The values are immutable once loaded from the OS environment.
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