v1.17.0

Official announcement: https://elixir-lang.org/blog/2024/06/12/elixir-v1-17-0-released/

1. Enhancements

Elixir

• [Access] Add Access.find/1 that mirrors Enum.find/2
• [Code] Support cursor inside fn/rescue/catch/else/after inside Code.Fragment.container_cursor_to_quoted/2
• [Date] Add Date.shift/2 to shift dates with duration and calendar-specific semantics
• [Date] Allow Date to accept years outside of -9999..9999 range
• [DateTime] Add DateTime.shift/2 to shift datetimes with duration and calendar-specific semantics
• [Duration] Add a new Duration data type
• [GenServer] Add c:GenServer.format_status/1 callback
• [Kernel] Add Kernel.get_in/1 with safe nil-handling for access and structs
• [Kernel] Add Kernel.is_non_struct_map/1 guard
• [Kernel] Add Kernel.to_timeout/1
• [Kernel] Emit warnings for undefined functions from modules defined within the same context as the caller code
• [Kernel] Support integers in uppercase sigils
• [Keyword] Add Keyword.intersect/2-3 to mirror the Map API
• [Macro] Add Macro.Env.define_alias/4, Macro.Env.define_import/4, Macro.Env.define_require/4, Macro.Env.expand_alias/4, Macro.Env.expand_import/5, and Macro.Env.expand_require/6 to aid the implementation of language servers and embedded languages
• [NaiveDateTime] Add NaiveDateTime.shift/2 to shift naive datetimes with duration and calendar-specific semantics
• [Process] Add Process.set_label/1
• [String] Add String.byte_slice/3 to slice a string to a maximum number of bytes while keeping it UTF-8 encoded
• [System] Support use_stdio: false in System.cmd/3 and System.shell/2
• [Time] Add Time.shift/2 to shift times with duration and calendar-specific semantics

ExUnit

• [ExUnit] Propagate the test process itself as a caller in start_supervised
• [ExUnit] Include max cases in ExUnit reports

IEx

• [IEx.Helpers] Warns if recompile was called and the current working directory changed
• [IEx.Helpers] Add c/0 as an alias to continue/0
• [IEx.Pry] Add IEx.Pry.annotate_quoted/3 to annotate a quoted expression with pry breakpoints

Logger

• [Logger] Format :gen_statem reports using Elixir data structures
• [Logger] Include process label in logger events

Mix

• [mix deps] Add :depth option to Mix.SCM.Git, thus supporting shallow clones of Git dependencies
• [mix deps] Warn if :optional is used in combination with :in_umbrella
• [mix deps.get] Do not add optional dependency requirements if its parent dep was skipped
• [mix deps.tree] Add --umbrella-only to mix deps.tree
• [mix profile.tprof] Add a new profiler, available on Erlang/OTP 27+, which can measure count, time, and heap usage
• [mix test] Add mix test --breakpoints that sets up a breakpoint before each test that will run
• [mix test] Add mix test --repeat-until-failure to rerun tests until a failure occurs
• [mix test] Add mix test --slowest-modules to print slowest modules based on all of the tests they hold
• [mix test] Generate cover HTML files in parallel

2. Bug fixes

Elixir

• [bin/elixir.bat] Improve handling of quotes and exclamation marks in flags
• [Code] Address a bug where AST nodes for (a -> b) were not wrapped as part of the literal encoder
• [Kernel] Resolve inconsistencies of how .. and ... are handled at the AST level
• [Kernel] Fix parsing precedence of ambiguous operators followed by containers
• [Kernel] Do not expand code in quote bind_quoted: ... twice
• [Kernel] Respect :line property when :file is given as option to quote
• [Kernel] Do not crash on Macro.escape/2 when passing a quote triplet without valid meta
• [Kernel] Avoid double tracing events when capturing a function
• [Kernel] Fix a bug where captured arguments would conflict when a capture included a macro that also used captures
• [Module] Return default value in Module.get_attribute/3 for persisted attributes which have not yet been written to

IEx

• [IEx.Helpers] Update the history size whenever history is pruned

Mix

• [mix deps] Fix error message for diverged SCM definition in sibling

3. Soft deprecations (no warnings emitted)

Elixir

• [GenServer] Deprecate c:GenServer.format_status/2 callback to align with Erlang/OTP 25+

Mix

• [mix profile.cprof] Deprecated in favor of the new mix profile.tprof
• [mix profile.eprof] Deprecated in favor of the new mix profile.tprof

4. Hard deprecations

Elixir

• [IO] Passing :all to IO.read/2 and IO.binread/2 is deprecated, pass :eof instead
• [Kernel] Single-quote charlists are deprecated, use ~c instead
• [Kernel] Deprecate escaping closing delimiter in uppercase sigils
• [Range] left..right without explicit steps inside patterns and guards is deprecated, write left..right//step instead
• [Range] Decreasing ranges, such as 10..1 without an explicit step is deprecated, write 10..1//-1 instead

ExUnit

• [ExUnit.Case] register_test/4 is deprecated in favor of register_test/6 for performance reasons