r-lib/mirai: mirai 2.5.0

Behavioural Changes

• Behavioural changes for daemons():
  • Returns invisibly logical TRUE when creating daemons and FALSE when resetting, for simplicity and consistency (#384).
  • Creating new daemons resets any existing daemons for the compute profile rather than error. This means that an explicit daemons(0) is no longer required before applying new settings (thanks @eliocamp, #383).
  • Calling without supplying any arguments now errors rather than return the value of status().

New Features

• Complete observability of mirai requests by emitting OpenTelemetry traces when tracing is enabled by the otelsdk package (#394).
• Adds info() as an alternative to status() for retrieving more succinct information statistics, more convenient for programmatic use (thanks @wlandau, #410).
• Adds with_daemons() and local_daemons() helper functions for using a particular compute profile. These work with daemons that are already set up unlike the existing with.miraiDaemons() method, which creates a new scope and tears it down when finished (#360).
• A mirai now has an attribute id, which is a monotonically increasing integer identifier unique to each session.

Updates

• stop_mirai() is more efficient and responsive, especially for 'mirai_map' objects (#417).
• miraiError enhancements:
  • The original condition classes are preserved as $condition.class (thanks @sebffischer, #400).
  • The print method includes the customary additional line break (thanks @sebffischer, #399).
• Fixes daemons(n) failing to launch local daemons if mirai was installed in a custom user library set by an explicit .libPaths() call in '.Rprofile' (thanks @erydit and @dpastoor, #390).
• Improved behaviour for serial_config() custom serialization. If the serialization hook function errors or otherwise fails to return a raw vector, this will error out rather than be silently ignored (thanks @dipterix, #378).
• as.promise() method for mirai made robust for high-throughput scenarios (#377).
• mirai_map() now supports Arrow Tables and Polars DataFrames (#366).
• require_daemons() arguments are swapped so that .compute comes before call for ease of use. Previous usage will work for the time being, although is deprecated and will be defunct in a future version.
• Enhancements to everywhere():
  • Consecutive everywhere() calls are permissible again when using dispatcher (behaviour update in v2.4.1) (#354).
  • No longer has any effect on the RNG stream when using a reproducible seed value at daemons() (#356).
• A mirai() evaluated on an ephemeral daemon returns invisibly, consistent with other cases (#351).
• daemon() gains a tlscert argument for custom TLS certificates. The change in argument name lets this be passed when making a daemons() call (#344).
• The tls argument at daemon(), launch_local() and launch_remote() is deprecated.
• Requires nanonext >= 1.7.0.