repl: add autocomplete for filesystem modules

PR-URL: #26648 Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

Author: antsmartian

lib/repl.js

@@ -1118,7 +1118,30 @@ function complete(line, callback) {
  }
 
  completionGroupsLoaded();
+ } else if (match = line.match(/fs\.\s*[a-z][a-zA-Z]+\(\s*["'](.*)/)) {
 
+ let filePath = match[1];
+ let fileList;
+ filter = '';
+
+ try {
+ fileList = fs.readdirSync(filePath, { withFileTypes: true });
+ completionGroups.push(fileList.map((dirent) => dirent.name));
+ completeOn = '';
+ } catch {
+ try {
+ const baseName = path.basename(filePath);
+ filePath = path.dirname(filePath);
+ fileList = fs.readdirSync(filePath, { withFileTypes: true });
+ const filteredValue = fileList.filter((d) =>
+ d.name.startsWith(baseName))
+ .map((d) => d.name);
+ completionGroups.push(filteredValue);
+ completeOn = filePath;
+ } catch {}
+ }
+
+ completionGroupsLoaded();
  // Handle variable member lookup.
  // We support simple chained expressions like the following (no function
  // calls, etc.). That is for simplicity and also because we *eval* that

test/fixtures/test-repl-tab-completion/.hiddenfiles

@@ -0,0 +1 @@
+This is hidden

test/fixtures/test-repl-tab-completion/hellorandom.txt

@@ -0,0 +1 @@
+Random txt

test/fixtures/test-repl-tab-completion/helloworld.js

@@ -0,0 +1 @@
+console.log("hello world");

test/parallel/test-repl-tab-complete.js

@@ -397,6 +397,45 @@ testMe.complete('obj.', common.mustCall((error, data) => {
  assert(data[0].includes('obj.key'));
 }));
 
+// Tab completion for files/directories
+{
+ putIn.run(['.clear']);
+ process.chdir(__dirname);
+
+ const readFileSync = 'fs.readFileSync("';
+ const fixturePath = `${readFileSync}../fixtures/test-repl-tab-completion`;
+ if (!common.isWindows) {
+ testMe.complete(fixturePath, common.mustCall((err, data) => {
+ assert.strictEqual(err, null);
+ assert.ok(data[0][0].includes('.hiddenfiles'));
+ assert.ok(data[0][1].includes('hellorandom.txt'));
+ assert.ok(data[0][2].includes('helloworld.js'));
+ }));
+
+ testMe.complete(`${fixturePath}/hello`,
+ common.mustCall((err, data) => {
+ assert.strictEqual(err, null);
+ assert.ok(data[0][0].includes('hellorandom.txt'));
+ assert.ok(data[0][1].includes('helloworld.js'));
+ })
+ );
+
+ testMe.complete(`${fixturePath}/.h`,
+ common.mustCall((err, data) => {
+ assert.strictEqual(err, null);
+ assert.ok(data[0][0].includes('.hiddenfiles'));
+ })
+ );
+
+ testMe.complete(`${readFileSync}./xxxRandom/random`,
+ common.mustCall((err, data) => {
+ assert.strictEqual(err, null);
+ assert.strictEqual(data[0].length, 0);
+ })
+ );
+ }
+}
+
 [
  Array,
  Buffer,