OCaml Changelog

• Fix deadlock on Windows (dune#8044, @nojb)
• When using sendfile to copy files on Linux, fall back to the portable version if it fails at runtime for some reason (NFS, etc). (dune#8049, fixes dune#8041, @emillon)

Added

• Adopt the OCaml Code of Conduct (#473, @rikusilvola)
• Added support for projects that have their OPAM files in the opam/ subdirectory. (#466, @Leonidas-from-XIV)

Changed

• Running dune-release check now attempts to discover and parse the change log, and a new flag --skip-change-log disables this behaviour. (#458, @gridbugs)
• List the main package and amount of subpackages when creating the PR to avoid very long package lists in PRs (#465, @emillon)

Fixed

• Avoid collision between branch and tag name. Tag detection got confused when branch was named the same as tag. Now it searches only for tag refs, instead of all refs. (#452, @3Rafal)
• Fix project name detection from dune-project. The parser could get confused when opam file generation is used. Now it only considers the first (name X) in the file. (#445, @emillon)

Removed

• Remove support for delegates. Previous users of this feature should now use dune-release delegate-info and wrap dune-release calls in a script. See #188 for details. (#428, @NathanReb)
• Removed support for the OPAM 1.2.2 client. This means dune-release expects the opam binary to be version 2.0 at least. (#406, #411, @Leonidas-from-XIV)

Fixes

• Fix file permissions used when specifying output files of pp and ppx. (ocaml-lsp#1153)

Features

• Add "Remove type annotation" code action. (#1039)
• Support settings through didChangeConfiguration notification (#1103)
• Add "Extract local" and "Extract function" code actions. (#870)
• Depend directly on merlin-lib 4.9 (#1070)

Fixes

• Support building with OCaml 5.0 and 5.1 (#1150)

• Disable code lens by default. The support can be re-enabled by explicitly setting it in the configuration. (#1134)

• Fix initilization of ocamlformat-rpc in some edge cases when ocamlformat is initialized concurrently (#1132)

• Kill unnecessary $ dune ocaml-merlin with SIGTERM rather than SIGKILL (#1124)

• Refactor comment parsing to use odoc-parser and cmarkit instead of octavius and omd (#1088)

  This allows users who migrated to omd 2.X to install ocaml-lsp-server in the same opam switch.

  We also slightly improved markdown generation support and fixed a couple in the generation of inline heading and module types.

• Allow opening documents that were already open. This is a workaround for neovim's lsp client (#1067)

• Disable type annotation for functions (#1054)

• Respect codeActionLiteralSupport capability (#1046)

• Fix a document syncing issue when utf-16 is the position encoding (#1004)

• Disable "Type-annotate" action for code that is already annotated. (#1037, fixes #1036)

• Fix semantic highlighting of long identifiers when using preprocessors (#1049, fixes #1034)

• Fix the type of DocumentSelector in cram document registration (#1068)

• Accept the --clientProcessId command line argument. (#1074)

• Accept --port as a synonym for --socket. (#1075)

• Fix connecting to dune rpc on Windows. (#1080)

• Switch back to threaded console for all systems; fix unresponsive console on Windows (dune#7906, @nojb)
• Respect -p / --only-packages for melange.emit artifacts (dune#7849, @anmonteiro)
• Fix scanning of Coq installed files (@ejgallego, reported by @palmskog, dune#7895 , fixes dune#7893)
• Fix RPC buffer corruption issues due to multi threading. This issue was only reproducible with large RPC payloads (dune#7418)
• Fix printing errors from excerpts whenever character offsets span multiple lines (dune#7950, fixes dune#7905, @rgrinberg)

• Fix a crash when using a version of Coq < 8.13 due to the native compiler config variable being missing. We now explicitly default to (mode vo) for these older versions of Coq. (dune#7847, fixes dune#7846, @Alizter)
• Duplicate installed Coq theories are now allowed with the first appearing in COQPATH being preferred. This is inline with Coq's loadpath semantics. This fixes an issue with install layouts based on COQPATH such as those found in nixpkgs. (dune#7790, @Alizter)
• Revert dune#7415 and dune#7450 (Resolve ppx_runtime_libraries in the target context when cross compiling) (dune#7887, fixes dune#7875, @emillon)

• [BUG] Variables are now expanded in build-env (as for setenv) [#5352 @dra27]
• Correctly handle empty environment variable additions [#5350 @dra27]
• Skip empty environment variable additions [#5350 @dra27]
• [BUG] Fix passing archive-mirrors field from init config file to config [#5315 @hannesm]
• git, hg: Use the full SHA1 revision instead of just the 8 first characters [#5342 @reynir]
• [BUG] Fix opam installing packages without checking their checksum when the local cache is corrupted in some case [#5538 @kit-ty-kate]

• merlin binary
  • Allow monadic IO in dot protocol (#1581)
  • Add a scope option to the occurrences command in preparation for the upcoming project-wide-occurrences feature (#1596)
  • Construct bool-typed holes as false instead of true in the construct command, for consistency (#1599).
  • Add a hook to configure system command for spawning ppxes when Merlin is used as a library. (#1585)
  • Implement an all-or-nothing cache for the PPX phase (#1584)
  • Cleanup functors caches when backtracking, to avoid memory leaks (#1609, fixes #1529 and ocaml-lsp#1032)
  • Fix construct results ordering for sum types sand poly variants (#1603)
  • Fix object method completion not working (#1606, fixes #1575)
  • Improve context detection for package types (#1608, fixes #1607)
  • Fix incorrect locations for string literals (#1574)
  • Fixed an issue that caused errors to erroneously alert about missing cmi files (#1577)
  • Prevent destruct from crashing on closed variant types (#1602, fixes #1601)
  • Improve longident parsing (#1612, fixes #945)
• editor modes
  • emacs: call the user's configured completion UI in merlin-construct (#1598)
• test suite
  • Add missing dependency to a test using ppxlib (#1583)
  • Add tests for the new PPX phase cache (#1584)
  • Add and update tests for construct ordering (#1603)

Added

• Introduce mdx stanza 0.4 requiring mdx >= 2.3.0 which updates the default list of files to include *.mld files (#7582, @Leonidas-from-XIV)

• Allow (stdlib ...) to be used with (wrapped false) in library stanzas (#7139, @anmonteiro).

• Allow the main module of a library with (stdlib ...) to depend on other libraries (#7154, @anmonteiro).

• Support (link_flags ...) in (cinaps ...) stanza. (#7423, fixes #7416, @nojb)

• Allow (package ...) in any position within (rule ...) stanza (#7445, @Leonidas-from-XIV)

• Added a new user action (concurrent ) which is like (progn ) but runs the actions concurrently. (#6933, @Alizter)

• Accept the Ordered Set Language for the modes field in library stanzas (#6611, @anmonteiro).

• Allow parallel execution of inline tests partitions (#7012, @hhugo)

• Add the --display-separate-messages flag to separate the error messages produced by commands with a blank line. (#6823, fixes #6158, @esope)

• Add --watch-exclusions to Dune build options (#7216, @jonahbeckford)

• Adds support for loading plugins in toplevels (#6082, fixes #6081, @ivg, @richardlford)

• Introduce a public_headers field on libraries. This field is like install_c_headers, but it allows to choose the extension and choose the paths for the installed headers. (#7512, @rgrinberg)

• Dune can now detect Coq theories from outside the workspace. This allows for composition with installed theories (not necessarily installed with Dune). (#7047, @Alizter, @ejgallego)

• Added a --no-build option to dune coq top for avoiding rebuilds (#7380, fixes #7355, @Alizter)

• Add a coqdoc_flags field to the coq.theory stanza allowing the user to pass extra arguments to coqdoc. (#7676, fixes #7954 @Alizter)

• Preliminary support for Coq compiled intefaces (.vos files) enabled via (mode vos) in coq.theory stanzas. This can be used in combination with dune coq top to obtain fast re-building of dependencies (with no checking of proofs) prior to stepping into a file. (#7406, @rlepigre)

• Read pkg-config arguments from the PKG_CONFIG_ARGN environment variable (#1492, #7734, @anmonteiro)

• Use $PKG_CONFIG, when set, to find the pkg-config binary (#7469, fixes #2572, @anmonteiro)

Changed

• Bootstrap: remove reliance on shell. Previously, we'd use the shell to get the number of processors. (#7274, @rgrinberg)

• Non-user proccesses such as version control or config checking are now run silently. (#6994, fixes #4066, @Alizter)

• Bytecode executables built for JSOO are linked with -noautolink and no longer depend on the shared stubs of their dependent libraries (#7156, @nojb)

• Always include opam files in the generated .install file. Previously, it would not be included whenever (generate_opam_files true) was set and the .install file wasn't yet generated. (#7547, @rgrinberg)

Deprecated

• Modules that were declared in (modules_without_implementation), (private_modules) or (virtual_modules) but not declared in (modules) will cause Dune to emit a warning which will become an error in 3.9. (#7608, fixes #7026, @Alizter)

• Coq language versions less 0.8 are deprecated, and will be removed in an upcoming Dune version. All users are required to migrate to (coq lang 0.8) which provides the right semantics for theories that have been globally installed, such as those coming from opam (@ejgallego, @Alizter)

Fixed

• Find pps dependencies in the host context when cross-compiling, (#7415, fixes #4156, @anmonteiro)

• Fix plugin loading with findlib. The functionality was broken in 3.7.0. (#7556, @anmonteiro)

• Load the host context findlib.conf when cross-compiling (#7428, fixes #1701, @rgrinberg, @anmonteiro)

• Allow overriding the ocaml binary with findlib configuration (#7648, @rgrinberg)

• Resolve ppx_runtime_libraries in the target context when cross compiling (#7450, fixes #2794, @anmonteiro)

• Fix dune install when cross compiling (#7410, fixes #6191, @anmonteiro, @rizo)

• Fix string quoting in the json file written by --trace-file (#7773, @rleshchinskiy)

• Correctly set MANPATH in dune exec. Previously, we would use the bin/ directory of the context. (#7655, @rgrinberg)

• merlin: ignore instrumentation settings for preprocessing. (#7606, fixes #7465, @Alizter)

• When a rule's action is interrupted, delete any leftover directory targets. This is consistent with how we treat file targets. (#7564, @rgrinberg)

• Fix dune crashing on MacOS in watch mode whenever $PATH contains $PWD (#7441, fixes #6907, @rgrinberg)

• Dune in watch mode no longer builds concurrent rules in serial (#7395 @rgrinberg, @jchavarri)

• dune coq top now correctly respects the project root when called from a subdirectory. However, absolute filenames passed to dune coq top are no longer supported (due to being buggy) (#7357, fixes #7344, @rlepigre and @Alizter)

• RPC: Ignore SIGPIPE when clients suddenly disconnect (#7299, #7319, fixes #6879, @rgrinberg)

• Always clean up the UI on exit. (#7271, fixes #7142 @rgrinberg)

• Bootstrap: correctly detect the number of processors by allowing nproc to be looked up in $PATH (#7272, @Alizter)

• Speed up file copying on macos by using clonefile when available (@rgrinberg, #7210)

• Support commands that output 8-bit and 24-bit colors in the terminal (#7188, @Alizter)

• Speed up rule generation for libraries and executables with many modules (#7187, @jchavarri)

• Do not re-render UI on every frame if the UI doesn't change (#7186, fix #7184, @rgrinberg)

• Make coq_db creation in scope lazy (@ejgallego, #7133)

• dune install now respects --display quiet mode (#7116, fixes #4573, fixes #7106, @Alizter)

• Stub shared libraries (dllXXX_stubs.so) in Dune-installed libraries could not be used as dependencies of libraries in the workspace (eg when compiling to bytecode and/or Javascript). This is now fixed. (#7151, @nojb)

• Fix regression where Merlin was unable to handle filenames with uppercase letters under Windows. (#7577, @nojb)

• On nix+macos, pass -f to the codesign hook to avoid errors when the binary is already signed (#7183, fixes #6265, @greedy)

• Fix bug where RPC clients built with dune-rpc-lwt would crash when closing their connection to the server (#7581, @gridbugs)

• Fix RPC server on Windows (used for OCaml-LSP). (#7666, @nojb)

• Fix regression with unit qualification when a Unit module is in scope with no () constructor (fix regression with unit qualification ocaml-community/utop#429, fixes regression with qualifying () ocaml-community/utop#428, @emillon)
• emacs: add completion-at-point implementation (Add completion-at-point implementation ocaml-community/utop#261 ocaml-community/utop#406, fixes utop emacs completion-at-point-functions support? ocaml-community/utop#261, @j-shilling)

• Add support for OCaml 5.1 (#421, @emillon)

• Mark prompt_continue, prompt_comment, smart_accept, new_prompt_hooks, at_new_prompt as deprecated (they have been documented as such since 2012 and most of them are ignored) (#415, @emillon)

• Qualify () constructor in generated expressions. (#418, fixes #417, @emillon)

Added

• Added support for mld files (#423, @jonludlam)

Changed

• Switch to using the parser that toplevel uses (found in a mutable ref, instead of always the official OCaml parser). This allows Camlp5's parser to be used with MDX. (#417, @chetmurthy)

• Fix segfault on MacOS when dune was being shutdown while in watch mode. (#7312, fixes #6151, @gridbugs, @emillon)

• Fix preludes not being recorded as dependencies in the (mdx) stanza (#7109, fixes #7077, @emillon).

• Pass correct flags when compiling stdlib.ml. (#7241, @emillon)

• Handle "Too many links" errors when using Dune cache on Windows. The fix in 3.7.0 for this same issue was not effective due to a typo. (#7472, @nojb)

Library

• The declaration of options is a regular module instead of a functor. (#2193, @EmileTrotignon)

Bug fixes

• Fix indentation when ocamlformat is disabled on an expression (#2129, @gpetiot)
• Reset max-indent when the max-indent option is not set (#2131, @hhugo, @gpetiot)
• Add missing parentheses around immediate objects having attributes attached in 4.14 (#2144, @gpetiot)
• Fix dropped comment attached to the identifier of an open-expression (#2155, @gpetiot)
• Correctly format chunks of file in presence of enable/disable floating attributes (#2156, @gpetiot)
• Remove abusive normalization in docstrings references (#2159, #2162, @EmileTrotignon)
• Fix parentheses around symbols in if-then-else branches (#2169, @gpetiot)
• Preserve position of comments around variant identifiers (#2179, @gpetiot)
• Fix parentheses around symbol identifiers (#2185, @gpetiot)
• Fix alignment inconsistency between let-binding and let-open (#2187, @gpetiot)
• Fix reporting of operational settings origin in presence of profiles (#2188, @EmileTrotignon)
• Fix alignment inconsistency of if-then-else in apply (#2203, @gpetiot)
• Fix automated Windows build (#2205, @nojb)
• Fix spacing between recursive module bindings and recursive module declarations (#2217, @gpetiot)
• ocamlformat-rpc: use binary mode for stdin/stdout (#2218, @rgrinberg)
• Fix interpretation of glob pattern in .ocamlformat-ignore under Windows (#2206, @nojb)
• Remove conf mutability, and correctly display the conventional profile when using print-config (#2233, @EmileTrotignon)
• Preserve position of comments around type alias (#2239, @EmileTrotignon)
• Preserve position of comments around constructor record (#2237, @EmileTrotignon)
• Preserve position of comments around external declaration strings (#2238, @EmileTrotignon, @gpetiot)
• Preserve position of comments around module pack expressions (#2234, @EmileTrotignon, @gpetiot)
• Correctly parenthesize array literals with attributes in argument positions (#2250, @ccasin)
• Janestreet: Fix indentation of functions passed as labelled argument (#2259, @Julow)

Changes

• Indent 2 columns after initializer keyword (#2145, @gpetiot)
• Preserve syntax of generative modules ((struct end) vs ()) (#2135, #2146, @trefis, @gpetiot)
• Preserve syntax of module unpack with type constraint (((module X) : (module Y)) vs (module X : Y)) (#2136, @trefis, @gpetiot)
• Normalize location format for warning and error messages (#2139, @gpetiot)
• Preserve syntax and improve readability of indexop-access expressions (#2150, @trefis, @gpetiot)
  • Break sequences containing indexop-access assignments
  • Remove unnecessary parentheses around indices
• Mute warnings for odoc code blocks whose syntax is not specified (#2151, @gpetiot)
• Improve formatting of odoc links (#2152, @gpetiot)
• Preserve sugared extension node attached to an if carrying attributes (#2167, @trefis, @gpetiot)
• Remove unnecessary parentheses around partially applied infix operators with attributes (#2198, @gpetiot)
• JaneStreet profile: doesn't align infix ops with open paren (#2204, @gpetiot)
• Re-use the type let_binding from the parser instead of value_binding, improve the spacing of let-bindings regarding of having extension or comments (#2219, @gpetiot)
• The ocamlformat package now only contains the binary, the library is available through the ocamlformat-lib package (#2230, @gpetiot)

New features

• Add a break-colon option to decide whether to break before or after the : symbol in value binding declarations and type constraints. This behavior is no longer ensured by ocp-indent-compat. (#2149, @gpetiot)
• Format .mld files as odoc documentation files (#2008, @gpetiot)
• New value vertical for option if-then-else (#2174, @gpetiot)
• New value vertical for option break-cases (#2176, @gpetiot)
• New value wrap-or-vertical for option break-infix that only wraps high precedence infix ops (#1865, @gpetiot)

• merlin binary
  • Update internal typer to match OCaml 4.14.1 release (#1557)
  • Improve type-enclosing behaviour when used on records' labels (#1565, fixes #1564)
  • Restore compatibility with some OCaml compiler's debug flags that were incorrectly rejected by Merlin (#1556)
  • Traverse aliases when jumping to declaration. This matches jump-to-definition's behavior (#1563)
  • Improve locate's behavior in various ill-typed expressions (#1546, fixes #1567 and partially #1543)
  • Correctly traverse patterns when looking for docs in the typedtree (#1572)
  • Get documentation when the declaration or definition is selected (#1542, fixes #1540)
  • On Windows, change to a harmless directory when launching server to avoid locking down current directory (#1569, fixes #1474)
• test suite
  • Add multiple tests for locate over ill-typed expressions (#1546)
  • Add non-regression tests for other fixes in this release

dune executable

Added

• Allow running $ dune exec in watch mode (with the -w flag). In watch mode, $ dune exec the executed binary whenever it is recompiled. (#6966, @gridbugs)

• Add a dune cache size command for displaying the size of the cache (#6638, @Alizter)

• Allow $ dune ocaml dump-dot-merlin to run in watch mode. Also this command shouldn't print "Entering Directory" mesages. (#6497, @rgrinberg)

• Add native support for polling mode on Windows (#7010, @yams-yams, @nojb, review by @Rucikir and @jbeckford)

• Auto-detect dune-workspace files as dune files in Emacs (#7061, @ilankri)

• Allow $ dune utop to load libraries defined in data only directories defined using (subdir ..) (#6631, @rgrinberg)

Changed

• Make dune describe workspace return consistent dependencies for executables and for libraries. By default, compile-time dependencies towards PPX-rewriters are from now not taken into account (but runtime dependencies always are). Compile-time dependencies towards PPX-rewriters can be taken into account by providing the --with-pps flag. (#6727, fixes #6486, @esope)

• Use colored output with MDX when Dune colors are enabled. (#6462, @MisterDA)

• Use colored output with GCC and Clang when compiling C stubs. The flag -fdiagnostics-color=always is added to the :standard set of flags. (#4083, @MisterDA)

• Move $ dune ocaml-merlin -dump-config=$dir to $ dune ocaml merlin dump-config $dir. (#6547, @rgrinberg)

Fixed

• Fix parsing of OCaml errors that contain code excerpts with ... in them. (#7008, @rgrinberg)

• Fix --trace-file output. Dune now emits a single complete event for every executed process. Unterminated async events are no longer written. (#6892, @rgrinberg)

• Print missing newline after $ dune exec. (#6821, fixes #6700, @rgrinberg, @Alizter)

• Fix binary corruption when installing or promoting in parallel (#6669, fixes #6668, @edwintorok)

• Report an error if dune init ... would create a "dune" file in a location which already contains a "dune" directory (#6705, @gridbugs)

• Fix the parsing of alerts. They will now show up in diagnostics correctly. (#6678, @rginberg)

• Print "Leaving Directory" whenever "Entering Directory" is printed. (#6419, fixes #138, @cpitclaudel, @rgrinberg)

• Remove "Entering Directory" messages for $ dune install. (#6513, @rgrinberg)

• dune clean should no longer fail under Windows due to the inability to remove the .lock file. Also, bring the implementation of the global lock under Windows closer to that of Unix. (#6523, @nojb)

• Fix missing dependencies when detecting the kind of C compiler we're using (#6610, fixes #6415, @emillon)

• Remove spurious build dir created when running dune init proj ... (#6707, fixes #5429, @gridbugs)

• Validate the command line arguments for $ dune ocaml top-module. This command requires one positional argument (#6796, fixes #6793, @rgrinberg)

• Fix dependency cycle when installing files to the bin section with glob_files (#6764, fixes #6708, @gridbugs)

• Handle "Too many links" errors when using Dune cache on Windows (#6993, @nojb)

• Pre-emptively clear screen in watch mode (#6987, fixes #6884, @rgrinberg)

• Allow --sandbox to affect ocamldep invocations. Previously, they were wrongly marked as incompatible (#6749, @rgrinberg)

dune language

Added

• Allow (include_subdirs qualified) for OCaml projects. (#6594, fixes #1084, @rgrinberg)

• Format dune files when they are named dune-file. This occurs when we enable the alternative file names project option. (#6566, @rgrinberg)

• Add map_workspace_root dune-project stanza to allow disabling of mapping of workspace root to /workspace_root. (#6988, fixes #6929, @richardlford)

• Allow the cinaps stanza to set a custom alias. By default, if the alias is not set then the cinaps actions will be attached to both @cinaps and @runtest (#6991, @rgrinberg)

• Add (using ctypes 0.3). When used, paths in (ctypes) are interpreted relative to where the stanza is defined. (#6883, fixes #5325, @emillon)

Changed

• Stop passing -q flag in dune coq top, which allows for .coqrc to be loaded. (#6848, fixes #6847, @Alizter)

• Coq native mode is now automatically detected by Dune starting with Coq lang 0.7. (mode native) has been deprecated in favour of detection from the configuration of Coq. (#6409, @Alizter)

• Accurately determine merlin configuration for all sources selected with copy# and copy_files#. The old heuristic of looking for a module in parent directories is removed (#6594, @rgrinberg)

Fixed

• Fix parsing of the <= operator in blang expressions of dune files. Previously, the operator would be interpreted as <. (#6928, @tatchi)

• Fix preprocessing with staged_pps (#6748, fixes #6644, @rgrinberg)

• Fix the parsing of decimal and hexadecimal escape literals in dune, dune-package, and other dune s-expression based files (#6710, @shym)

• Fix cross compilation configuration when a context with targets is itself a host of another context (#6958, fixes #6843, @rgrinberg)

• Allow compilation rules to be impacted by (env ..) stanzas that modify the environment or set binaries. (#6527, @rgrinberg)

• Fix handling of support files generated by odoc. (#6913, @jonludlam)

• Fix the compilation of modules generated at link time when implicit_transitive_deps is enabled (#6642, @rgrinberg)

• Fix inline tests with js_of_ocaml and whole program compilation mode enabled (#6645, @hhugo)

• Fix js_of_ocaml separate compilation rules when --enable=effects ,--enable=use-js-string or --toplevel is used. (#6714, #6828, #6920, @hhugo)

• Fix js_of_ocaml separate compilation in presence of linkall (#6832, #6916, @hhugo)

• coqdep is now called once per theory, instead of one time per Coq file. This should significantly speed up some builds, as coqdep startup time is often heavy (#7048, @Alizter, @ejgallego)

• Fix configurator when using the MSVC compiler (#6538, fixes #6537, @nojb)

• Fix running the RPC server on windows (#6721 fixes #6720, @rgrinberg)

Fixed

• Undid the change to the pipe code to restore compatibility with Windows (#403, @MisterDA)

Fixes

• Fix race condition when a document was being edited and dune in watch mode was running (#1005, fixes #941, #1003)

Added

• Report all parsing errors in Markdown files (#389, @NathanReb)

Changed

• Preserve indentation in multiline OCaml blocks in .mli files (#395, @panglesd)
• Rename the Normal syntax to Markdown to better explain what the syntax is and moved it to Mdx.Syntax (#412, @Leonidas-from-XIV)

Fixed

• Fixed compatibility with Cmdliner 1.1.0 (#371, @Leonidas-from-XIV)
• Report errors and exit codes of toplevel directives (#382, @talex5, @Leonidas-from-XIV)
• Fix block locations in error reporting (#389, @NathanReb)
• Include the content of the line that features the part-end MDX directive in the output, before that line would've been dropped (#374, #387, @Leonidas-from-XIV)
• Handle EINTR signal on waitpid call by restarting the syscall. (#409, @tmcgilchrist)
• Fix parsing of multiline toplevel phrases in .mli files (#394, #397, @Leonidas-from-XIV)

Removed

• Removed warning about missing semicolons added in MDX 1.11.0 and the automatic insertion of semicolons in the corrected files introduced in MDX 2.0.0. (#398, @Leonidas-from-XIV)

Features

• Enable semantic highlighting support by default (#933)

• Support connecting over pipes and socket. Pipes on Windows aren't yet supported (#946)

  More about communication channels in LSP specification.

• Re-enable ocamlformat-rpc for formatting code snippets (but not files and not on Windows) (#920, #939)

  One needs to have installed either ocamlformat package version > 0.21.0 or, otherwise, ocamlformat-rpc package. Note that previously ocamlformat-rpc came in a standalone OPAM package, but since ocamlformat version > 0.21.0, it comes within ocamlformat package.

• Add custom ocamllsp/hoverExtended request (#561)

• Support utf-8 position encoding clients (#919)

  More about position encoding in LSP specification.

• Show unwrapped module alias types on hovering over module names. This is due to upgrading to merlin 4.7 and using merlin's verbosity=smart by default (#942)

Fixes

• Respect the client's completion item resolve and preSelect capabilities (#925, #936)

• Disable polling for dune's watch mode on Windows and OCaml 4.14.0 (#935)

• Fix semantic highlighting of "long identifiers," e.g., Foo.Bar.x (#932)

• Fix syncing of document contents:

  • For ranges that span an entire line (#927)
  • Previously, whole line edits would incorrectly eat the newline characters (#971)

• Bump the compatibility to 4.08+ (#393 @emillon)
• Load @toplevel_printer annotated printers for functors (#378 @metavinek)
• Do not display a backtrace when exiting normally (#399 #398 @emillon)

Oops, we went looking but didn't find the changelog for this release 🙈

• Add support for OCaml 5.0. Dose3 >= 6.1 and base64 >= 3.1.0 are now required [#5357 @kit-ty-kate @dra27 - fix #5354]
• [BUG] Fix all empty conflict explanation messages [#5378 @kit-ty-kate - partial fix #4373]

Additions

• New unstable option --as-json for the HTML renderer that emits HTML fragments (preamble, content) together with metadata (table of contents, breadcrumbs, whether katex is used) in JSON format. (@sabine, #908)
• New maths support via {m ... } and {math ... } tags. (@giltho, @gpetiot, #886)
• Various optimisations (@jonludlam, #870, #883)
• Better handling of alerts and deprecation notices. (@panglesd, #828)
• Handle language tags on code blocks (@julow, #848)

Bugfixes

• Shadowing issues (@jonludlam, #853)
• Layout fixes and improvements (@panglesd, #832, #839, #847)
• Handle comments on class constraints and inherit (@julow, #844)
• Disable the missing root warning (@jonludlam, #881)

Oops, we went looking but didn't find the changelog for this release 🙈

• merlin binary
  • Replace custom "holes" AST nodes by extensions. This restores binary compatibility and fixes issues with PPXs when using typed-holes. (#1503)
  • Do not change temporarily Merlin's cwd when starting a PPX (#1521, fixes #1420)
  • Fix a parsing issue when declaring the (??) custom prefix operator. (#1507, fixes #1506)
  • Fix variant constructors' comments grouping (#1516, @mheiber, fixes #1513)
  • Filter-out duplicates from the enclosing command result (#1512)
  • Add a new verbosity=smart mode for type enclosing that only expand modules' types (#1374, @ulugbekna)
  • Improve locate for labels' declarations in the current buffer. (#1505, fixes #1524)
  • Fix locate on module without implementation (#1522, fixes #1519)
  • Allow program name customization when merlin is used as a library. (#1532)
• editor modes
  • vim: load the plugin when necessary if it wasn't loaded before (#1511)
  • emacs: xref works from context menus; better highlighting of xref matches; xref recognises operators and binding operators at the cursor position; bad locations are filtered out (#1385, fixes #1410)
  • emacs: update CI for newer releases and fix some warnings (#1454, @mattiase)
• test suite
  • Add tests for constructors' documentation (#1511)
  • Add test cases for label comment documentation (#1526, @mheiber)
  • Add a test for the enclosing command (#1512)
  • Add tests for interactions between locate and record labels (#1505)
  • Add test showing an issue with locate and implicit transitive deps

• Fix status line enabled when ANSI colors are forced. (#6503, @MisterDA)

• Fix build with MSVC compiler (#6517, @nojb)

• Do not shadow library interface modules (#6549, fixes #6545, @rgrinberg)

dune executable

This lists features of the “dune” executable itself. Upgrading dune will bring in these changes. We consider these changes safe, but it is difficult to define what a breaking change is for a command-line tool (for example, some error messages change). It is important to note that just upgrading the dune executable is not supposed to change how dune interprets existing projects. If just upgrading dune breaks compilation, it is a bug in dune, please report it!

Added

• Introduce a $ dune ocaml top-module subcommand to load modules directly without sealing them behind the signature. (#5940, @rgrinberg)
• Revive $ dune external-lib-deps under $ dune describe external-lib-deps. (#6045, @moyodiallo)
• Extend the promotion CLI to a dune promotion group: dune promote is moved to dune promotion apply (the former still works) and the new dune promotion diff command can be used to just display the promotion without applying it. (#6160, fixes #5368, @emillon)
• Build progress status now shows number of failed jobs (#6242, @Alizter)
• Allow promoting into source directories specified by subdir (#6404, fixes #3502, @rgrinberg)
• Support CLICOLOR and CLICOLOR_FORCE to enable/disable/force ANSI colors. (#6340, fixes #6323, @MisterDA).
• Create a fake socket file _build/.rpc/dune on windows to allow rpc clients to connect using the build directory. (#6329, @rgrinberg)

Fixed

• Forbid multiple instances of dune running concurrently in the same workspace. (#6360, fixes #236, @rgrinberg)
• Make dune describe workspace return the correct root path (#6380, fixes #6379, @esope)
• Fix running inline tests in bytecode mode (#5622, fixes #5515, @dariusf)

(lang dune 3.6)

This lists changes if you opt into the new (lang dune 3.6) version in your dune-project file. For this too, these are changes that we consider safe, but they can require changes to your dune files. For example, sandboxing is enabled in more places, which means that you might have to be more precise in expressing your dependencies. Please reach out on the issue tracker if you have trouble fixing your dune file or if something does not seem to be possible anymore.

Added

• Add (glob_files <glob>) and (glob_files_rec <glob>) terms to the files field of the install stanza (#6250, closes #6018, @gridbugs)
• Allow Byte_complete binaries to be installable (#4837, @AltGr, @rgrinberg)
• Allow :standard in the (modules) field of the coq.pp stanza (#6229, fixes #2414, @Alizter)

Fixed

• Allow absolute build directories to find public executables. For example, those specified with (deps %{bin:...}) (#6326, @anmonteiro)
• [ctypes] do not mangle user written names in the ctypes stanza (#6374, fixes #5561, @rgrinberg)
• Forbid private libraries with (package ..) set from depending on private libraries that don't belong to a package (#6385, fixes #6153, @rgrinberg)
• [ctypes] always re-run pkg-config because we aren't tracking its external dependencies (#6052, @rgrinberg)
• [ctypes] remove dependency on configurator in the generated rules (#6052, @rgrinberg)
• Fix passing of flags to dune coq top (#6369, fixes #6366, @Alizter)
• Prevent crash if absolute paths are used in the install stanza and in recursive globs. These cases now result in a user error. (#6331, @gridbugs)