Implement file index provider

This powers VSCode's built-in fuzzy file finder.

package.json

@@ -430,6 +430,7 @@
         "vscode": "^1.1.21"
     },
     "dependencies": {
+        "binary-split": "^1.0.5",
         "jsonc-parser": "^2.0.0",
         "socks": "^2.2.0",
         "ssh2": "^0.6.0",

src/connect.ts

@@ -31,7 +31,7 @@ export async function calculateActualConfig(config: FileSystemConfig): Promise<F
   config.host = replaceVariables(config.host);
   const port = replaceVariables((config.port || '') + '');
   if (port) config.port = Number(port);
-  config.agent = replaceVariables(config.agent);
+  config.agent = replaceVariables(config.agent) || process.env.SSH_AUTH_SOCK;
   config.privateKeyPath = replaceVariables(config.privateKeyPath);
   if (config.putty) {
     let nameOnly = true;

src/extension.ts

@@ -27,6 +27,7 @@ export function activate(context: vscode.ExtensionContext) {
     subscribe(vscode.commands.registerCommand(command, callback, thisArg));
 
   subscribe(vscode.workspace.registerFileSystemProvider('ssh', manager, { isCaseSensitive: true }));
+  subscribe(vscode.workspace.registerFileIndexProvider('ssh', manager));
 
   async function pickAndClick(func: (name: string) => void, name?: string, activeOrNot?: boolean) {
     name = name || await pickConfig(manager, activeOrNot);

src/manager.ts

@@ -117,7 +117,7 @@ async function tryGetHome(ssh: Client): Promise<string | null> {
   return mat[1];
 }
 
-export class Manager implements vscode.FileSystemProvider, vscode.TreeDataProvider<string> {
+export class Manager implements vscode.FileSystemProvider, vscode.FileIndexProvider, vscode.TreeDataProvider<string> {
   public onDidChangeTreeData: vscode.Event<string>;
   public onDidChangeFile: vscode.Event<vscode.FileChangeEvent[]>;
   protected fileSystems: SSHFileSystem[] = [];
@@ -194,7 +194,7 @@ export class Manager implements vscode.FileSystemProvider, vscode.TreeDataProvid
         root = root.replace(/^~/, home.replace(/\/$/, ''));
       }
       const sftp = await getSFTP(client, config);
-      const fs = new SSHFileSystem(name, sftp, root, config!);
+      const fs = new SSHFileSystem(name, client, sftp, root, config!);
       try {
         const rootUri = vscode.Uri.parse(`ssh://${name}/`);
         const stat = await fs.stat(rootUri);
@@ -289,6 +289,9 @@ export class Manager implements vscode.FileSystemProvider, vscode.TreeDataProvid
     if (fs !== (await assertFs(this, newUri))) throw new Error(`Can't copy between different SSH filesystems`);
     return fs.rename(oldUri, newUri, options);
   }
+  public async provideFileIndex(options: vscode.FileSearchOptions, token: vscode.CancellationToken): Promise<vscode.Uri[]> {
+    return (await assertFs(this, options.folder)).provideFileIndex(options, token);
+  }
   /* TreeDataProvider */
   public getTreeItem(element: string): vscode.TreeItem | Thenable<vscode.TreeItem> {
     return createTreeItem(this, element);

src/sshFileSystem.ts

@@ -3,9 +3,10 @@ import * as path from 'path';
 import * as ssh2 from 'ssh2';
 import * as ssh2s from 'ssh2-streams';
 import * as vscode from 'vscode';
+import * as split from 'binary-split';
 import { FileSystemConfig } from './manager';
 
-export class SSHFileSystem implements vscode.FileSystemProvider {
+export class SSHFileSystem implements vscode.FileSystemProvider, vscode.FileIndexProvider {
   public waitForContinue = false;
   public closed = false;
   public closing = false;
@@ -13,15 +14,19 @@ export class SSHFileSystem implements vscode.FileSystemProvider {
   public onDidChangeFile: vscode.Event<vscode.FileChangeEvent[]>;
   protected onDidChangeFileEmitter = new vscode.EventEmitter<vscode.FileChangeEvent[]>();
 
-  constructor(public readonly authority: string, protected sftp: ssh2.SFTPWrapper,
-              public readonly root: string, public readonly config: FileSystemConfig) {
+  constructor(
+      public readonly authority: string,
+      protected ssh: ssh2.Client,
+      protected sftp: ssh2.SFTPWrapper,
+      public readonly root: string,
+      public readonly config: FileSystemConfig) {
     this.onDidChangeFile = this.onDidChangeFileEmitter.event;
-    this.sftp.on('end', () => this.closed = true);
+    this.ssh.on('end', () => this.closed = true);
   }
 
   public disconnect() {
     this.closing = true;
-    this.sftp.end();
+    this.ssh.end();
   }
 
   public relative(relPath: string) {
@@ -138,6 +143,39 @@ export class SSHFileSystem implements vscode.FileSystemProvider {
   public rename(oldUri: vscode.Uri, newUri: vscode.Uri, options: { overwrite: boolean; }): void | Promise<void> {
     return this.continuePromise(cb => this.sftp.rename(this.relative(oldUri.path), this.relative(newUri.path), cb));
   }
+
+  public async provideFileIndex(options: vscode.FileSearchOptions, token: vscode.CancellationToken): Promise<vscode.Uri[]> {
+    const name = this.config.label || this.config.name;
+    const command = `find ${this.relative(options.folder.path)} -print0`;
+    return new Promise<vscode.Uri[]>((resolve, reject) => {
+      const stream = this.ssh.exec(command, (err, stream) => {
+        if (err) return reject(err);
+        stream.stderr.on('data', (d) => {
+          console.log("Stderr from directory listing:", d.toString())
+        })
+        const uris: vscode.Uri[] = [];
+        stream.pipe(split("\x00")).on('data', (d) => {
+          const p = path.posix.relative(this.root, d.toString());
+          uris.push(vscode.Uri.parse(`ssh://${name}/${p}`))
+        });
+        stream.on('error', reject);
+        stream.on('close', (exitCode, signal) => {
+          if (exitCode || signal) {
+            return reject(new Error("error listing directory"));
+          }
+          resolve(uris);
+        });
+      });
+    });
+  }
+
+  public async provideTextSearchResults(
+    query: vscode.TextSearchQuery,
+    options: vscode.TextSearchOptions,
+    progress: vscode.Progress<vscode.TextSearchResult>, token: vscode.CancellationToken
+  ): Promise<void> {
+
+  }
 }
 
 export default SSHFileSystem;