feat: :RustLsp openDocs command (#326)

Co-authored-by: Github Actions <actions@github>

Author: mrcjkb

CHANGELOG.md

@@ -6,6 +6,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [4.18.0] - 2024-03-27
+
+### Added
+
+- `:RustLsp openDocs` command [[#325](https://github.com/mrcjkb/rustaceanvim/issues/325)].
+
 ## [4.17.0] - 2024-03-26
 
 ### Added

README.md

@@ -452,6 +452,21 @@ vim.keymap.set(
   ```
 </details>
 
+<details>
+  <summary>
+	<b>Open docs.rs documentation</b>
+  </summary>
+
+  Open docs.rs documentation for the symbol under the cursor.
+  
+  ```vimscript
+  :RustLsp openDocs
+  ```
+  ```lua
+  vim.cmd.RustLsp('openDocs')
+  ```
+</details>
+
 <details>
   <summary>
 	<b>Parent Module</b>

doc/rustaceanvim.txt

@@ -43,6 +43,7 @@ It accepts the following subcommands:
  'renderDiagnostic' - Display a hover window with the rendered diagnostic,
                       as displayed during `cargo build`.
  'openCargo' - Open the Cargo.toml file for the current package.
+ 'openDocs' - Open docs.rs documentation for the symbol under the cursor.
  'parentModule' - Open the current module's parent module.
  'workspaceSymbol {onlyTypes?|allSymbols?} {query?}'
                   Filtered workspace symbol search.

lua/rustaceanvim/commands/init.lua

@@ -139,6 +139,11 @@ local rustlsp_command_tbl = {
       require('rustaceanvim.commands.open_cargo_toml')()
     end,
   },
+  openDocs = {
+    impl = function(_)
+      require('rustaceanvim.commands.external_docs')()
+    end,
+  },
   parentModule = {
     impl = function(_)
       require('rustaceanvim.commands.parent_module')()

lua/rustaceanvim/init.lua

@@ -36,6 +36,7 @@
 --- 'renderDiagnostic' - Display a hover window with the rendered diagnostic,
 ---                      as displayed during `cargo build`.
 --- 'openCargo' - Open the Cargo.toml file for the current package.
+--- 'openDocs' - Open docs.rs documentation for the symbol under the cursor.
 --- 'parentModule' - Open the current module's parent module.
 --- 'workspaceSymbol {onlyTypes?|allSymbols?} {query?}'
 ---                  Filtered workspace symbol search.