package trace-tef

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val collector : 
  out:[ `File of string | `Stderr | `Stdout ] ->
  unit ->
  Trace.collector

Make a collector that writes into the given output. See setup for more details.

type output = [

]

Output for tracing.

val setup : ?out:[ output | `Env ] -> unit -> unit

setup () installs the collector depending on out.

parameter out
can take different values:
- regular output value to specify where events go
- `Env will enable tracing if the environment variable "TRACE" is set.
If it's set to anything but "1", the value is taken to be the file path into which to write. If it's set to "1", then the file is "trace.json".

val with_setup : ?out:[ output | `Env ] -> (unit -> 'a) -> 'a

Setup, and make sure to shutdown before exiting