initial

1 files changed, 48 insertions, 0 deletions

diff --git a/cmd/hopper/main.go b/cmd/hopper/main.go
new file mode 100644
index 0000000..cc58d0d
--- /dev/null
+++ b/cmd/hopper/main.go
@@ -0,0 +1,48 @@
+package main
+
+import (
+	"context"
+	"os"
+	"os/signal"
+	"strconv"
+	"sync/atomic"
+	"syscall"
+
+	"tsne.dev/hopper/internal/cli"
+	"tsne.dev/hopper/internal/log"
+)
+
+func main() {
+	log.Init(os.Stdout, os.Stderr)
+
+	sigch := make(chan os.Signal, 1)
+	signal.Notify(sigch, syscall.SIGINT, syscall.SIGTERM)
+
+	ctx, cancel := context.WithCancelCause(context.Background())
+	defer cancel(nil)
+
+	var receivedSignal int64
+	go func() {
+		sig := (<-sigch).(syscall.Signal)
+		atomic.StoreInt64(&receivedSignal, int64(sig))
+
+		var signame string
+		switch sig {
+		case syscall.SIGINT:
+			signame = "SIGINT"
+		case syscall.SIGTERM:
+			signame = "SIGTERM"
+		default:
+			signame = "signal " + strconv.Itoa(int(sig))
+		}
+
+		log.Print("received %s", signame)
+		cancel(cli.CancellationError("operation aborted (" + signame + ")"))
+	}()
+
+	code := cli.Run(ctx, os.Args[1:])
+	if sig := atomic.LoadInt64(&receivedSignal); sig != 0 {
+		code = 128 + int(sig)
+	}
+	os.Exit(code)
+}