Initial project import

node_modules/concurrently/dist/lib/output-writer.js

@@ -0,0 +1,63 @@
+import Rx from 'rxjs';
+import { fromSharedEvent } from './observables.js';
+/**
+ * Class responsible for actually writing output onto a writable stream.
+ */
+export class OutputWriter {
+    outputStream;
+    group;
+    buffers;
+    activeCommandIndex = 0;
+    error;
+    get errored() {
+        return this.outputStream.errored;
+    }
+    constructor({ outputStream, group, commands, }) {
+        this.outputStream = outputStream;
+        this.ensureWritable();
+        this.error = fromSharedEvent(this.outputStream, 'error');
+        this.group = group;
+        this.buffers = commands.map(() => []);
+        if (this.group) {
+            Rx.merge(...commands.map((c) => c.close)).subscribe((command) => {
+                if (command.index !== this.activeCommandIndex) {
+                    return;
+                }
+                for (let i = command.index + 1; i < commands.length; i++) {
+                    this.activeCommandIndex = i;
+                    this.flushBuffer(i);
+                    // TODO: Should errored commands also flush buffer?
+                    if (commands[i].state !== 'exited') {
+                        break;
+                    }
+                }
+            });
+        }
+    }
+    ensureWritable() {
+        if (this.errored) {
+            throw new TypeError('outputStream is in errored state', { cause: this.errored });
+        }
+    }
+    write(command, text) {
+        this.ensureWritable();
+        if (this.group && command) {
+            if (command.index <= this.activeCommandIndex) {
+                this.outputStream.write(text);
+            }
+            else {
+                this.buffers[command.index].push(text);
+            }
+        }
+        else {
+            // "global" logs (command=null) are output out of order
+            this.outputStream.write(text);
+        }
+    }
+    flushBuffer(index) {
+        if (!this.errored) {
+            this.buffers[index].forEach((t) => this.outputStream.write(t));
+        }
+        this.buffers[index] = [];
+    }
+}