Unreleased

Features

Tag "unused code" and "deprecated" warnings, allowing clients to better display them. (#848)

Fixes

Respect showDocument capabilities. Do not offer commands or code actions that rely on this request without client support. (#836)
Fix signatureHelp on .mll files: avoid "Document.dune" exceptions

1.13.1

Fixes

Fix cwd when executing ppx (#805)

1.13.0

Features

Code actions for jumping to related files (.ml, .mli, etc.) (#795)

1.12.4

Allow cancellation of workspace symbols requests (#777)
Fix unintentionally interleaved jsonrpc IO that would corrupt the session (#786)
Ignore SIGPIPE . (#788)

1.12.3

Fixes

Fix a bad interaction between inferred interfaces and promotion code actions in watch mode (#753)
Fix URI parsing (#739 fixes #471 and #459)

1.12.2

Fixes

Fix shutting down an already closed socket (#740)

1.12.1

Fixes

Fix preprocessing, ppx, and reason support (#735 fixes #696, #706)
Support include in folding ranges (#730)

1.12.0

Features

Fix cancellation mechanism for all requests (#707)
Allow cancellation of formatting requests (#707)
Add --fallback-read-dot-merlin to the LSP Server (#705). If ocamllsp is started with this new flag, it will fall back to looking for Merlin configuration in .merlin files rather than calling dune ocaml-merlin. (#705)
Support folding more ranges (#692)

1.11.6

Fixes

Stop leaking file descriptors like a sieve (#701)

1.11.5

Fix process termination. Once the lsp server is stepped, the process will gracefully terminate (#697, fixes #694)
Forward stderr from dune's merlin configuration to the lsp server's stderr (#697)

1.11.4

Fixes

Fix bug with large buffers being resized incorrectly in Lev
Add folding ranges for more AST types (#680)

1.11.3

Fixes

Enable dune rpc integration by default (#691, fixes #690)

1.11.2

Fixes

Fix running external processes on Windows

1.11.1

Fixes

Fix Uri handling on Windows
Fix build on MSVC 2015

1.11.0

Features

Add support for dune in watch mode. The lsp server will now display build errors in the diagnostics and offer promotion code actions.
Re-introduce ocamlformat-rpc (#599, fixes #495)

Fixes

Fix workspace symbols that could have a wrong path in some cases (#675)

1.10.6

Fixes

Compatiblity with OCaml 4.14.0

1.10.5

Fixes

Patch merlin to remove the result module

1.10.4

Fixes

Use newer versions of ocamlformat-rpc-lib (fixes #697)

1.10.3

Fixes

Fix more debouncing bugs (#629)

1.10.2

Fixes

Catch merlin desturct exceptions (#626)
Fix broken debouncing (#627)

1.10.1

Fixes

Fix executing ppx executables

1.10.0

Features

Add better support for code folding: more folds and more precise folds

Fixes

Fix infer interface code action crash when implementation source does not exist (#597)
Improve error message when the reason plugin for merlin is absent (#608)
Fix chdir races when running ppx (#550)
More accurate completion kinds. New completion kinds for variants and fields. Removed inaccurate completion kinds for constructors and types. (#510)
Fix handling request cancellation (#616)

1.9.1

Fixes

Disable functionality reliant on ocamlformat-rpc for now (#555)
4.13 compatiblity

1.9.0 (11/21/2021)

Fixes

Ppx processes are now executed correctly (#513)

Breaking Change

ocamllsp drops support for .merlin files, and as a consequence no longer depends on dot-merlin-reader. (#523)

Features

New code action to automatically remove values, types, opens (#502)

1.8.3 (09/26/2021)

Fix debouncing of document updates. It was essentially completely broken in all but the most trivial cases. (#509 fixes #504)
Fix completion when passing named and functional arguments (#512)

1.8.2 (09/14/2021)

Disable experimental dune support. It was accidentally left enabled.

1.8.1 (09/12/2021)

Update to latest merlin.

1.8.0 (08/19/2021)

Fixes

Handle workspace change notifications. Previously, the server would only use the set of workspaces given at startup to search for workspace symbols. After this change, workspace folders that are added later will also be considered. (#498)

Features

Add a new code action Add missing rec keyword, which is available when adding a rec keyword can fix Unbound value ... error, e.g.,
```
let fact n = if n = 0 then 1 else n * fact (n - 1)
                                   (* ^^^^ Unbound value fact *)
```
Adding rec to the definition of fact will fix the problem. The new code action offers adding rec.
Use ocamlformat to properly format type snippets. This feature requires the ocamlformat-rpc opam package to be installed. (#386)
Add completion support for polymorphic variants, when it is possible to pin down the precise type. Examples (<|> stands for the cursor) when completion will work (#473)

Function application:
```
let foo (a: [`Alpha | `Beta]) = ()

foo `A<|>
```
Type explicitly shown:
```
let a : [`Alpha | `Beta] = `B<|>
```
Note: this is actually a bug fix, since we were ignoring the backtick when constructing the prefix for completion.
Parse merlin errors (best effort) into a more structured form. This allows reporting all locations as "related information" (#475)
Add support for Merlin Construct command as completion suggestions, i.e., show complex expressions that could complete the typed hole. (#472)
Add a code action Construct an expression that is shown when the cursor is at the end of the typed hole, i.e., _|, where | is the cursor. The code action simply triggers the client (currently only VS Code is supported) to show completion suggestions. (#472)
Change the formatting-on-save error notification to a warning notification (#472)
Code action to qualify ("put module name in identifiers") and unqualify ("remove module name from identifiers") module names in identifiers (#399)

Starting from:
```
open Unix

let times = Unix.times ()
let f x = x.Unix.tms_stime, x.Unix.tms_utime
```
Calling "remove module name from identifiers" with the cursor on the open statement will produce:
```
open Unix

let times = times ()
let f x = x.tms_stime, x.tms_utime
```
Calling "put module name in identifiers" will restore:
```
open Unix

let times = Unix.times ()
let f x = x.Unix.tms_stime, x.Unix.tms_utime
```

Fixes

Do not show "random" documentation on hover
- fixed by merlin#1364
- fixes duplicate:
  - ocaml-lsp#344
  - vscode-ocaml-platform#111
Correctly rename a variable used as a named/optional argument (#478)
When reporting an error at the beginning of the file, use the first line not the second (#489)

1.7.0 (07/28/2021)

Features

Add sub-errors as "related" information in diagnostics (#457)
Add support for navigating to a symbol inside a workspace (#398)
Show typed holes as errors

Merlin has a concept of "typed holes" that are syntactically represented as _. Files that incorporate typed holes are not considered valid OCaml, but Merlin and OCaml-LSP support them. One example when such typed holes can occur is when on "destructs" a value, e.g., destructing (Some 1) will generate code match Some 1 with Some _ -> _ | None -> _. While the first underscore is a valid "match-all"/wildcard pattern, the rest of underscores are typed holes.

1.6.1 (05/17/2020)

Fixes

Switch verbosity from 1 to 0. This is the same default that merlin uses. The old value for verbosity (#433)
Get fresh diagnostics (warning and error messages) on a file save (#438)

Note: If you want the fresh diagnostics to take into account changes in other files, you likely need to rebuild your project. An easy way to get automatic rebuilds is to run dune in a watching mode, e.g.,[dune build --watch].

1.6.0 (04/30/2020)

Features

Code action to annotate a value with its type (#397)

Fixes

Fix interface/implementation switching on Windows (#427)
Correctly parse project paths with spaces and other special characters that must be escaped.
Print types with -short-paths even if the project wasn't built yet

1.5.0 (03/18/2020)

Support 4.12 and drop support for all earlier versions
Update to the latest version of merlin

1.4.1 (03/16/2020)

Fixes

Backport fixes from merlin (#382, #383)
Encode request & notification params in a list. This is required by the spec. (#351)

1.4.0 (12/17/2020)

Features

Support cancellation notifications when possible. (#323)
Implement signature help request for functions (#324)
Server LSP requests & notifications concurrently. Requests that require merlin are still serialized. (#330)

1.3.0 (11/23/2020)

Features

Code action to insert inferred module interface (#308)
Filter keywords by context (#307)

1.2.0 (11/16/2020)

Features

Add keyword completion
Add go to declaration functionality to jump to a value's specification in a .mli file (#294)

Fixes

#245: correctly use mutexes on OpenBSD (#264)
#268: Do not use vendored libraries when building the lsp package (#260)
#271: Clear diagnostics when files are closed
Disable non-prefix completion. There's no reliably way to trigger it and it can be slow.

1.1.0 (10/14/2020)

Features

Implement a command to switch between module interfaces and implementations (#254)

Fixes

Do not crash on invalid positions (#248)
add missing record fields to list of completions (#253)
do not offer destruct as a code action in interface files (#255)

1.0.0 (08/28/2020)

Initial Release