Support set logging level with variable.

Author: Junfeng Li

doc/LanguageClient.txt

@@ -165,6 +165,13 @@ Whether to load language server settings.
 Default: 0
 Valid options: 1 | 0
 
+2.13 g:LanguageClient_loggingLevel           *g:LanguageClient_loggingLevel*
+
+Logging level.
+
+Default: 'WARN'
+Valid options: 'DEBUG' | 'INFO' | 'WARN' | 'ERROR'
+
 ==============================================================================
 3. Commands                                           *LanguageClientCommands*
 

min-init.vim

@@ -9,3 +9,4 @@ autocmd BufReadPost *.rs setlocal filetype=rust
 let g:LanguageClient_serverCommands = {
     \ 'rust': ['rustup', 'run', 'nightly', 'rls'],
     \ }
+let g:LanguageClient_loggingLevel = 'DEBUG'

src/languageclient.rs

@@ -435,13 +435,14 @@ impl ILanguageClient for Arc<Mutex<State>> {
     }
 
     fn sync_settings(&self) -> Result<()> {
-        let (autoStart, serverCommands, mut selectionUI, trace, settingsPath, loadSettings): (
+        let (autoStart, serverCommands, mut selectionUI, trace, settingsPath, loadSettings, loggingLevel): (
             u64,
             HashMap<String, Vec<String>>,
             String,
             String,
             String,
             u64,
+            String,
         ) = self.eval(
             &[
                 "!!get(g:, 'LanguageClient_autoStart', 1)",
@@ -450,6 +451,7 @@ impl ILanguageClient for Arc<Mutex<State>> {
                 "get(g:, 'LanguageClient_trace', 'Off')",
                 "get(g:, 'LanguageClient_settingsPath', '.vim/settings.json')",
                 "!!get(g:, 'LanguageClient_loadSettings', 1)",
+                "get(g:, 'LanguageClient_loggingLevel', 'WARN')",
             ][..],
         )?;
         // vimscript use 1 for true, 0 for false.
@@ -475,6 +477,12 @@ impl ILanguageClient for Arc<Mutex<State>> {
             _ => return Err(format_err!("Unknown selectionUI option: {:?}", selectionUI)),
         };
 
+        let logger = LOGGER
+            .deref()
+            .as_ref()
+            .or_else(|_| Err(format_err!("No logger")))?;
+        logger::set_logging_level(logger, &loggingLevel)?;
+
         let (diagnosticsEnable, diagnosticsList, diagnosticsDisplay, windowLogMessageLevel): (
             u64,
             DiagnosticsList,

tests/data/vimrc

@@ -10,6 +10,7 @@ let $LANGUAGECLIENT_DEBUG = 1
 let g:LanguageClient_serverCommands = {
     \ 'javascript': ['javascript-typescript-stdio'],
     \ }
-let g:LanguageClient_selectionUI = "location-list"
+let g:LanguageClient_selectionUI = 'location-list'
+let g:LanguageClient_loggingLevel = 'DEBUG'
 
 autocmd BufReadPost *.rs setlocal filetype=rust