feat: Add line-streamName event to Subprocess (#439)

appium · Jul 2, 2024 · f6babc7 · f6babc7
1 parent 6689289
commit f6babc7
Showing 1 changed file with 9 additions and 2 deletions.
diff --git a/lib/subprocess.js b/lib/subprocess.js
@@ -172,8 +172,15 @@ class SubProcess extends EventEmitter {
       const handleStreamLines = (/** @type {string} */ streamName, /** @type {import('stream').Readable} */ input) => {
         const rl = createInterface({input});
         rl.on('line', (line) => {
-          this.emit(`lines-${streamName}`, [line]);
-          this.emitLines(streamName, line);
+          // This event is a legacy one
+          // It always produces a single-item array
+          if (this.listenerCount(`lines-${streamName}`)) {
+            this.emit(`lines-${streamName}`, [line]);
+          }
+          this.emit(`line-${streamName}`, line);
+          if (this.listenerCount('stream-line')) {
+            this.emitLines(streamName, line);
+          }
         });
       };