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Development Mode

Pedestal can operate in two different modes: production, and local development.

Local development mode changes the behavior of a handful of macros and functions to support live development at the REPL.

Development mode is enabled by setting value of JVM system property io.pedestal.dev-mode to true at startup.

From the command line, this can be accomplished by using the -J switch:

clj -J-Dio.pedestal.dev-mode=true ...

Alternately, you can update your deps.edn file, associating a JVM option with an alias:

   ...
   :aliases
     {:dev-mode
       {:jvm-opts ["-Dio.pedestal.dev-mode=true"]}
   ...

You can then reference the alias when starting a REPL session:

clj -A:dev-mode ...

The var api:dev-mode?[ns=io.pedestal.environment] stores the boolean result derived from reading the system property; there is no mechanism for turning development mode on or off during execution.

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