Improve logging

src/logging.ts

@@ -29,6 +29,13 @@ export interface LoggingOptions {
    * Defaults to 0 meaning no offset.
    */
   callStacktraceOffset: number;
+  /** Used when the "message" to be logged is an Error object with a stack.
+   * 0: Don't output the stack
+   * -1: Output the whole stack
+   * N: Only output the first N lines
+   * The stack gets stringified in the first logger, so child loggers don't inherit, it uses the default (which is 0)
+   */
+  maxErrorStack: number;
 }
 
 export const LOGGING_NO_STACKTRACE: Partial<LoggingOptions> = { callStacktrace: 0 };
@@ -42,6 +49,7 @@ class Logger {
     reportedFromLevel: 0,
     callStacktrace: 0,
     callStacktraceOffset: 0,
+    maxErrorStack: 0,
   };
   public overriddenTypeOptions: { [type in LoggerDefaultLevels]?: Partial<LoggingOptions> } = {
     warning: { callStacktrace: 3, reportedFromLevel: 2 },
@@ -79,15 +87,21 @@ class Logger {
   }
   protected print(type: string, message: string | Error, partialOptions?: Partial<LoggingOptions>) {
     const options: LoggingOptions = { ...this.defaultLoggingOptions, ...this.overriddenTypeOptions[type], ...partialOptions };
-    // Format errors with stacktraces to display the stacktrace
+    // Format errors with stacktraces to display the JSON and the stacktrace if needed
     if (message instanceof Error && message.stack) {
-      let json: string = '';
+      let msg = message.message;
       try {
-        json = JSON.stringify(message);
-      } finally {
-        json = json ? `\nJSON: ${json}` : '';
-        message = `${message.message}${json}\n${message.stack}`;
+        msg += `\nJSON: ${JSON.stringify(message)}`;
+      } finally { }
+      const { maxErrorStack } = options;
+      if (message.stack && maxErrorStack) {
+        let { stack } = message;
+        if (maxErrorStack > 0) {
+          stack = stack.split(/\n/g).slice(0, maxErrorStack).join('\n');
+        }
+        msg += '\n' + stack;
       }
+      message = msg;
     }
     // Do we need to also output a stacktrace?
     const { callStacktrace, callStacktraceOffset = 0 } = options;

src/sshFileSystem.ts

@@ -6,7 +6,23 @@ import * as vscode from 'vscode';
 import { FileSystemConfig } from './fileSystemConfig';
 import { Logger, Logging, LOGGING_NO_STACKTRACE, LOGGING_SINGLE_LINE_STACKTRACE, withStacktraceOffset } from './logging';
 
-const LOGGING_HANDLE_ERROR = withStacktraceOffset(1, LOGGING_SINGLE_LINE_STACKTRACE);
+// This makes it report a single line of the stacktrace of where the e.g. logger.info() call happened
+// while also making it that if we're logging an error, only the first 4 lines of the stack (including the error message) are shown
+// (usually the errors we report on happen deep inside ssh2 or ssh2-streams, we don't really care that much about it)
+const LOGGING_HANDLE_ERROR = withStacktraceOffset(1, { ...LOGGING_SINGLE_LINE_STACKTRACE, maxErrorStack: 4 });
+
+// All absolute paths (relative to the FS root)
+// If it ends with /, .startsWith is used, otherwise a raw equal
+const IGNORE_NOT_FOUND: string[] = [
+  '/.vscode',
+  '/.vscode/',
+  '/.git/',
+  '/node_modules',
+  '/pom.xml',
+];
+function shouldIgnoreNotFound(path: string) {
+  return IGNORE_NOT_FOUND.some(entry => entry === path || entry.endsWith('/') && path.startsWith(entry));
+}
 
 export class SSHFileSystem implements vscode.FileSystemProvider {
   public waitForContinue = false;
@@ -142,6 +158,12 @@ export class SSHFileSystem implements vscode.FileSystemProvider {
   }
   // Helper function to handle/report errors with proper (and minimal) stacktraces and such
   protected handleError(uri: vscode.Uri, e: Error & { code?: any }, doThrow: (boolean | ((error: any) => void)) = false): any {
+    if (e.code === 2 && shouldIgnoreNotFound(uri.path)) {
+      // Whenever a workspace opens, VSCode (and extensions) (indirectly) stat a bunch of files
+      // (.vscode/tasks.json etc, .git/, node_modules for NodeJS, pom.xml for Maven, ...)
+      this.logging.debug(`Ignored FileNotFound error for: ${uri}`, LOGGING_NO_STACKTRACE);
+      if (doThrow === true) throw e; else if (doThrow) return doThrow(e); else return;
+    }
     Logging.error(`Error handling uri: ${uri}`, LOGGING_NO_STACKTRACE);
     Logging.error(e, LOGGING_HANDLE_ERROR);
     // Convert SSH2Stream error codes into VS Code errors