Add version information in help

grpc-dump/main.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"github.com/bradleyjkemp/grpc-tools/grpc-proxy"
 	"github.com/bradleyjkemp/grpc-tools/internal/proto_descriptor"
+	_ "github.com/bradleyjkemp/grpc-tools/internal/versionflag"
 	"github.com/jhump/protoreflect/desc"
 	"os"
 	"strings"

grpc-fixture/grpc-fixture.go

@@ -4,6 +4,7 @@ import (
 	"flag"
 	"fmt"
 	"github.com/bradleyjkemp/grpc-tools/grpc-proxy"
+	_ "github.com/bradleyjkemp/grpc-tools/internal/versionflag"
 	"os"
 )
 

grpc-replay/grpc-replay.go

@@ -7,6 +7,7 @@ import (
 	"github.com/bradleyjkemp/grpc-tools/internal"
 	"github.com/bradleyjkemp/grpc-tools/internal/codec"
 	"github.com/bradleyjkemp/grpc-tools/internal/marker"
+	_ "github.com/bradleyjkemp/grpc-tools/internal/versionflag"
 	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials"

grpc-view/main.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"github.com/bradleyjkemp/grpc-tools/internal"
+	_ "github.com/bradleyjkemp/grpc-tools/internal/versionflag"
 	"github.com/rivo/tview"
 	"io"
 	"os"

internal/versionflag/version.go

@@ -0,0 +1,20 @@
+package versionflag
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"runtime/debug"
+)
+
+func init() {
+	version := "non-module"
+	if info, ok := debug.ReadBuildInfo(); ok {
+		version = info.Main.Version
+	}
+
+	flag.Usage = func() {
+		fmt.Fprintf(flag.CommandLine.Output(), "Usage of %s (%s):\n", os.Args[0], version)
+		flag.PrintDefaults()
+	}
+}