Reimplement gitignore filter with formatFiles.useGitIgnore setting

src/ext/queries/file-query-api.ts

@@ -4,6 +4,7 @@ import * as path from 'path';
 import * as mm from 'micromatch';
 import { Config } from '../utilities/config';
 import { Logger } from '../utilities/logger';
+import { Git } from '../utilities/git';
 
 type FilterFn = (path: string, isDirectory: boolean) => boolean;
 
@@ -25,6 +26,7 @@ type WithGlobOptions = {
 export class FileQueryApi {
   private _config = Config.instance;
   private _logger = new Logger('files-api');
+  private _git = new Git();
 
   private constructor(
     public readonly workspaceFolder: WorkspaceFolder,
@@ -109,6 +111,19 @@ export class FileQueryApi {
     };
   }
 
+  private getGitIgnoreFilter(): FilterFn | undefined {
+    if (!this._config.useGitIgnore) {
+      return;
+    }
+
+    this._logger.info(`\tgetting git ignore filter`);
+
+    return (file): boolean => {
+      const ignored = this._git.isIgnored(Uri.file(file));
+      return !ignored;
+    };
+  }
+
   private async execute(): Promise<Uri[]> {
     this._logger.info(`searching for files in workspace ${this.workspaceFolder.uri.fsPath}`);
 
@@ -124,6 +139,11 @@ export class FileQueryApi {
       builder = builder.filter(excludeFilter);
     }
 
+    const gitIgnoreFilter = this.getGitIgnoreFilter();
+    if (gitIgnoreFilter) {
+      builder = builder.filter(gitIgnoreFilter);
+    }
+
     if (this._config.excludedFolders.length) {
       const excludedFolders = this._config.excludedFolders.map(folder => path.resolve(this.workspaceFolder.uri.fsPath, folder));
       builder = builder.exclude((_directoryName, directoryPath) => {