chore: add Apache License 2.0 and ignore build directory

src/app/run.go

@@ -0,0 +1,61 @@
+// Package app coordinates capture, transcription, and caption presentation.
+package app
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"io"
+
+	"tea.chunkbyte.com/kato/captioneer/src/captions"
+	"tea.chunkbyte.com/kato/captioneer/src/capture"
+	"tea.chunkbyte.com/kato/captioneer/src/config"
+	"tea.chunkbyte.com/kato/captioneer/src/models"
+	"tea.chunkbyte.com/kato/captioneer/src/output"
+)
+
+func Run(ctx context.Context, settings config.Settings, sink output.Sink, diagnostics io.Writer) error {
+	if err := capture.ValidatePrograms(); err != nil {
+		return err
+	}
+	resources, err := models.New(settings)
+	if err != nil {
+		return err
+	}
+	defer resources.Close()
+
+	ctx, cancel := context.WithCancel(ctx)
+	defer cancel()
+
+	monitorSource, err := capture.DefaultMonitorSource(ctx)
+	if err != nil {
+		return fmt.Errorf("find default output monitor: %w", err)
+	}
+	fmt.Fprintf(diagnostics, "Capturing from: %s\n", monitorSource)
+	fmt.Fprintln(diagnostics, "Press Ctrl+C to stop.")
+
+	packets, waitCapture, err := capture.Packets(ctx, monitorSource)
+	if err != nil {
+		return fmt.Errorf("start system-audio capture: %w", err)
+	}
+
+	processor := captions.New(settings, resources, sink.Publish)
+	var processErr error
+	for packet := range packets {
+		if err := processor.Accept(packet); err != nil {
+			processErr = fmt.Errorf("publish caption: %w", err)
+			cancel()
+			break
+		}
+	}
+	if processErr == nil {
+		processErr = processor.Flush()
+	}
+	captureErr := waitCapture()
+	if captureErr != nil && ctx.Err() == nil {
+		captureErr = fmt.Errorf("audio capture stopped unexpectedly: %w", captureErr)
+	} else {
+		captureErr = nil
+	}
+	return errors.Join(processErr, captureErr)
+}