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IronRuby 4.0.2

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@github-actions github-actions released this 28 Oct 14:14
· 19 commits to master since this release
v4.0.2
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Learn about vigilant mode.

IronRuby 4.0.2 runs a Rails 8.1 app with SQLite on Windows, is about 1.2 times as fast
across IronRuby's micro benchmarks and starts in 1.25 s instead of 1.86 s, serves TLS through
net/http and Puma, and calls .NET the way Ruby 4 code is written. The legacy parser and the
Ruby 1.9 library are gone. The interpreter is now called ironruby, as JRuby's is jruby,
and every download comes with a signed build provenance attestation.

Download

Self-contained: unpack one and run ./ironruby, ./irb.sh and ./igem.sh - on Windows
ironruby.cmd, irb.cmd and igem.cmd. No .NET to install. ir.sh and ir.cmd still
work.

  • Windows x64: ironruby-4.0.2-win-x64.zip, with Windows Forms, WPF, ironrubyw.exe
    and Samples\Notepad\notepad.cmd
  • Linux x64: ironruby-4.0.2-linux-x64.tar.gz
  • macOS arm64: ironruby-4.0.2-osx-arm64.tar.gz, built in CI, not tested there

SHA256SUMS lists the checksums. Each archive and SHA256SUMS has a signed build
provenance attestation, which says which workflow built it, from which commit, in which run:

gh attestation verify ironruby-4.0.2-linux-x64.tar.gz --repo Largo/ironruby

New

  • Rails 8.1 with SQLite on Windows (#34). gem install rails, rails new,
    bundle install, a scaffold, migrations, importmap with Turbo and Stimulus, and
    bin/rails server on Puma and sqlite3, as a Windows user would run them. It took
    File#flock on Windows, IO readiness without libc, Bundler's platforms: for IronRuby,
    binstubs that start IronRuby, and a dozen more fixes, listed in
    Docs/rails-on-windows.md.
    In a sweep of popular gems on Windows, 81 give the same output as CRuby byte for byte,
    among them rubocop, standard, rspec, pry, prawn, sprockets and listen.
  • Faster (#22). IronRuby's 50 micro benchmarks run in 11.2 s instead of 26.1 s (geometric
    mean 1.21x): switching fibers is 7.1x as fast, raise/rescue 5.5x, keyword arguments
    about 9x, near CRuby's time. ironruby -e 1 starts in about 1.25 s instead of 1.86 s.
  • TLS (#28, #32, #33). OpenSSL::SSL::SSLSocket is non-blocking, so net/http's open,
    read and write timeouts work unmodified, for RubyGems too; certificates are verified
    against the context's CAs, with verify_callback. Puma serves ssl://.
  • Calling .NET (#26, #31, #25). Keyword arguments bind to parameters by name, a block
    goes to the trailing delegate parameter (list.Sort { |a, b| b <=> a }, Task.Run { }),
    and the split .NET libraries load on demand, so System::Console just works. super in
    initialize runs the .NET base constructor. Stores into a boxed struct's field stick,
    zlib works on Windows, and so do Process.kill and File::NULL.
  • Ruby 4.0 (#23, #30). Many core classes now behave as CRuby 4.0's, found by running
    IronRuby and CRuby side by side and by ruby/spec. Rational and Complex are ports of
    CRuby 4.0's, and Pathname is CRuby 4.0's own.
  • prism 2.0 (#27). IronRuby follows ruby/prism's new serialization, and deeply nested
    code runs instead of overflowing the stack.

Changed

  • The interpreter is ironruby (#35), and so is RbConfig's ruby_install_name: the
    binstubs Bundler and Rails write start #!/usr/bin/env ironruby, a line Ruby runs as
    Ruby. ir, ir.sh and ir.cmd stay as its short name. On Windows, ironrubyw.exe is
    the same interpreter without a console window, as rubyw.exe is CRuby's; the Notepad
    sample starts with it.
  • ironruby with no script reads the program from stdin (#35), as ruby does, at a terminal
    too, and $0 is "-". It used to start the DLR's interactive console; irb is irb or
    iirb.
  • Prism is the only parser (#34). -X:UsePrism is still accepted and does nothing.
  • Gems written for prism 1.x or bigdecimal 2.x and 3.x activate with the built-in
    prism 2.0 and bigdecimal 4.0 (#34): rubocop, standard, minitest 6 and prawn among them.
  • Windows: file names, ENV, ARGV and the default external encoding are UTF-8, as in
    CRuby; Dir.pwd keeps a short 8.3 path as it was given; Dir.home uses /; local time
    follows daylight saving time (#19).
  • The Ruby 1.9 library is removed (#29, #30), including its cgi code with known
    vulnerabilities and a win32/sspi that wrote past its buffers on 64-bit Windows.

Security and auditing

  • Signed build provenance for every published file, made by GitHub's actions/attest in
    the job that built it (#36).
  • The repository holds no programs any more: 18 test fixtures and sample DLLs from 2016,
    which nothing built or shipped, are gone, and CI fails if one comes back (#36). The
    upstream checkouts the build uses are pinned (#29).

Thanks

@khasinski for File#flock on macOS (#17) and for
ir -S <gem executable> finding RubyGems' binstubs (#18).

Known limits

  • The release targets .NET 8, whose support ends on 10 November 2026.
  • macOS is built, not tested. The full status is in the
    README.

What's Changed

  • prism: follow ruby/prism cd76b0d1 (attach_comments) - fixes red CI by @Largo in #21
  • Time: follow daylight saving time on Windows by @Largo in #19
  • ir.cmd: put RubyGems' bindir on RUBYPATH, so ir -S <gem executable> finds its binstub by @Largo in #20
  • File#flock: offer flock(2) on macOS, where the rest of Posix is not by @khasinski in #17
  • ir.sh: put RubyGems' bindir on RUBYPATH, so ir -S <gem executable> finds its binstub by @khasinski in #18
  • Speedup: method JIT, calls, blocks, exceptions and library fast paths by @Largo in #22
  • Align IronRuby with Ruby 4.0 behavior: core class fixes, CI prism pin, loader fix by @Largo in #23
  • Windows and CLR interop fixes: boxed struct fields, zlib, File::NULL, Process.kill, JSON control characters by @Largo in #25
  • Test: a symbol in a prism-skimmed method body by @Largo in #24
  • prism: follow ruby/prism 30a25553 (post-order serialization); run deeply nested code by @Largo in #27
  • Dependency audit: pin upstream checkouts, drop obsolete and vulnerable 1.9-era code by @Largo in #29
  • net/http over TLS: non-blocking SSLSocket, timeouts, and the context's CAs by @Largo in #28
  • Replace the Ruby 1.9 library tree with Ruby 4.0 implementations by @Largo in #30
  • CLR interop gaps: super into CLR constructors, CLR constants, strings for Object parameters by @Largo in #31
  • CLR interop for modern Ruby: keywords, blocks and delegates, pattern matching, on-demand BCL loading by @Largo in #26
  • puma: serve TLS - Puma::MiniSSL::Engine on SslStream by @Largo in #32
  • SSLSocket#write_nonblock: hand over up to 1 MB, convert only that (flaky NetHttp_Tls1) by @Largo in #33
  • Remove the legacy parser; run Rails 8.1 + SQLite and popular gems on Windows by @Largo in #34
  • Call the interpreter ironruby, as JRuby's is jruby; ir stays its short name by @Largo in #35
  • Release: signed build provenance for every published file by @Largo in #36
  • IronRuby 4.0.2 by @Largo in #37

New Contributors

Full Changelog: v4.0.1...v4.0.2

Contributors

Largo and khasinski
Assets 6
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