repl: add autocomplete for filesystem modules

PR-URL: https://github.com/nodejs/node/pull/26648
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

1 files changed, 23 insertions, 0 deletions

diff --git a/lib/repl.js b/lib/repl.js
index a7eb22e396..d439d205a4 100644
--- a/lib/repl.js
+++ b/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