cmd/sips, cmd/sipsctl: fix signal handling in Docker (#7)

* internal/cli: add $GOOS-specific signal lists

* cmd/sips, cmd/sipsctl: use the new signal lists from `internal/cli`

cmd/sips/sips.go

@@ -92,7 +92,7 @@ func run(ctx context.Context) error {
 }
 
 func main() {
-	ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt)
+	ctx, cancel := signal.NotifyContext(context.Background(), cli.Signals...)
 	defer cancel()
 
 	err := run(ctx)

cmd/sipsctl/sipsctl.go

@@ -3,15 +3,15 @@ package main
 
 import (
 	"context"
-	"os"
 	"os/signal"
 
 	"github.com/DeedleFake/sips/cmd/sipsctl/cmd"
+	"github.com/DeedleFake/sips/internal/cli"
 	"github.com/DeedleFake/sips/internal/log"
 )
 
 func main() {
-	ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt)
+	ctx, cancel := signal.NotifyContext(context.Background(), cli.Signals...)
 	defer cancel()
 
 	err := cmd.ExecuteContext(ctx)

internal/cli/cli_posix.go

@@ -0,0 +1,14 @@
+// +build linux unix darwin netbsd openbsd freebsd
+
+package cli
+
+import (
+	"os"
+
+	"golang.org/x/sys/unix"
+)
+
+var Signals = []os.Signal{
+	os.Interrupt,
+	unix.SIGTERM,
+}

internal/cli/cli_windows.go

@@ -0,0 +1,12 @@
+package cli
+
+import (
+	"os"
+
+	"golang.org/x/sys/windows"
+)
+
+var Signals = []os.Signal{
+	os.Interrupt,
+	windows.SIGTERM,
+}