• New feature
  • Add Logger metadata in MuonTrap.Daemon. See the :logger_metadata option. (@bjyoungblood)

• Bug fixes
  • Support logging output to all Elixir logger levels. Previously the "new" set
    that includes emergency, critical, warning, etc. would fail the option check
  • Default the log_transform option to replace invalid UTF8 characters so
    they don't crash the Logger. This fixes an annoyance where a program would
    do this and there'd be log crash spam. It's still overridable, so users
    using custom loggers that already handle this can pass
    Function.identity/1 to disable. (@jjcarstens)

• New feature
  • Add a timeout option to MuonTrap.cmd/3. OS processes that take too long
    will be killed and a :timeout return status returned. This is backwards
    compatible. Thanks to @bjyoungblood for adding this feature.

• Bug fixes

  • Fix issue where lots of prints from a child process when the Erlang process
    side is killed can cause MuonTrap to not clean up the child process. There
    are some potential variations on this that were also fixed even though they
    were unseen. Thanks to @bjyoungblood for figuring this out.

• Improvements

  • Improve debug logging so that when enabled, fatal errors are written to the
    log as well and not to stderr.

• Bug fixes
  • Fix C compiler error when building with older versions of gcc. This fixes an
    compile error with Ubuntu 20.04, for example.

• Bug fixes
  • Fix regression in v1.3.0 where stderr would be printed when stderr_to_stdout: true
    was specified and logging disabled.

• New feature

  • Add flow control to stdout (and stderr if capturing it) to prevent
    out-of-memory VM crashes from programs that can spam stdout. The output
    would accumulate in the process mailbox waiting to be processed. The flow
    control implementation will push back and slow down output generation. The
    number of bytes in flight defaults to 10 KB and is set with the new
    :stdio_window parameter. (@jjcarstens)

• Bug fixes

  • Fix various minor issues preventing unit tests from passing on MacOS.
    (@jjcarstens)

• New feature
  • Added :exit_status_to_reason to the Daemon to be able to change how the
    Daemon GenServer exits based on the exit status of the program being run.
    (@erauer)

• New features
  • Support transforming output from programs before sending to the log. See the
    new :log_transform option. (@brunoro)

This release only changes the version number. It has no code changes.