feat!: Error diagnostics

CHANGELOG.md

@@ -18,6 +18,11 @@ Changelog structure reference:
 
 ## [Unreleased]
 
+### Added
+
+#### Error diagnostics (NEW)
+- Basic diagnostics info from LSP (mostly just trivial syntax errors)
+
 ## [0.3.1]
 
 ### Added

README.md

@@ -15,6 +15,7 @@ Feature tracker:
   - Code completion
   - Code folding
   - Syntax highlighting
+  - Basic error diagnostics
   - Go to definition
   - Rename symbol
   - Hover documentation

src/main/java/com/falsepattern/zigbrains/lsp/ZLSServerDefinition.java

@@ -0,0 +1,19 @@
+package com.falsepattern.zigbrains.lsp;
+
+import org.eclipse.lsp4j.InitializeParams;
+import org.eclipse.lsp4j.PublishDiagnosticsCapabilities;
+import org.wso2.lsp4intellij.client.languageserver.serverdefinition.RawCommandServerDefinition;
+
+public class ZLSServerDefinition extends RawCommandServerDefinition {
+    public ZLSServerDefinition(String[] command) {
+        super("zig", command);
+    }
+
+    @Override
+    public void customizeInitializeParams(InitializeParams params) {
+        var textCaps = params.getCapabilities().getTextDocument();
+        if (textCaps.getPublishDiagnostics() == null) {
+            textCaps.setPublishDiagnostics(new PublishDiagnosticsCapabilities());
+        }
+    }
+}

src/main/java/com/falsepattern/zigbrains/lsp/ZLSStartupActivity.java

@@ -88,8 +88,7 @@ public class ZLSStartupActivity implements StartupActivity {
                         }
                     }
                 }
-                IntellijLanguageClient.addServerDefinition(
-                        new RawCommandServerDefinition("zig", cmd.toArray(String[]::new)));
+                IntellijLanguageClient.addServerDefinition(new ZLSServerDefinition(cmd.toArray(String[]::new)));
             } finally {
                 lock.unlock();
             }