Changelog for Elixir v1.9

v1.9.0-dev

1. Enhancements

EEx

[EEx] Allow more complex mixed expression when tokenizing

Elixir

[CLI] Add support for --boot, --boot-var, --erl-config, --pipe-to, --rpc-eval, and --vm-args options
[File] Add File.rename!/2
[Kernel] Optimize generated code for with with a catch-all clause
[Protocol] Improve Protocol.UndefinedError messages to also include the type that was attempted to dispatch on
[System] Add System.restart/0 and System.pid/0
[System] Support SOURCE_DATE_EPOCH for reproducible builds

ExUnit

[ExUnit.DocTest] No longer wrap doctest errors in custom exceptions. They ended-up hiding more information than showing

Logger

[Logger] Use a descentralized mode computation for Logger which allows overloads to be detect more quickly

Mix

[mix release] Add support for releases

2. Bug fixes

Elixir

[Kernel] Properly merge and handle docs for callbacks with multiple clauses
[Kernel] Guarantee reproducible builds on modules with dozens of specs
[Kernel] Resolve __MODULE__ accordingly in nested defmodule to avoid double nesting

ExUnit

[ExUnit] Raise error if attempting to run single line tests on multiple files

IEx

[IEx] Automatically shut down IEx if we receive EOF

3. Soft-deprecations (no warnings emitted)

4. Hard-deprecations

Elixir

[CLI] Deprecate --detached option, use --erl "-detached" instead

Mix

[Mix.Project] Deprecate Mix.Project.load_paths/1 in favor of Mix.Project.compile_path/1

v1.8

The CHANGELOG for v1.8 releases can be found in the v1.8 branch.