improve CLI usability (#4670)

closes #3308
2021-02-22 07:27:03 +00:00
parent 55b59407e4
commit 960668ccdb
2 changed files with 11 additions and 7 deletions
--- a/bin/uglifyjs
+++ b/bin/uglifyjs
@@ -260,9 +260,14 @@ if (paths.length) {
    });
    run();
 } else {
+    var timerId = process.stdin.isTTY && process.argv.length < 3 && setTimeout(function() {
+        print_error("Waiting for input... (use `--help` to print usage information)");
+    }, 1500);
    var chunks = [];
    process.stdin.setEncoding("utf8");
-    process.stdin.on("data", function(chunk) {
+    process.stdin.once("data", function() {
+        clearTimeout(timerId);
+    }).on("data", function(chunk) {
        chunks.push(chunk);
    }).on("end", function() {
        files = { STDIN: chunks.join("") };