feat: add ascii-banners on long-running processes to help debugging

go.mod

@@ -59,7 +59,9 @@ require (
 	gopkg.in/yaml.v2 v2.3.0 // indirect
 	gopkg.in/yaml.v3 v3.0.0-20200506231410-2ff61e1afc86
 	honnef.co/go/tools v0.0.1-2020.1.4 // indirect
+	moul.io/banner v1.0.1
 	moul.io/godev v1.6.0
+	moul.io/motd v1.0.0
 	moul.io/roundtripper v1.0.0
 	moul.io/srand v1.4.0
 	moul.io/zapgorm v1.0.0

go/cmd/pathwar/main.go

@@ -31,7 +31,9 @@ import (
 	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
 	"golang.org/x/oauth2"
+	"moul.io/banner"
 	"moul.io/godev"
+	"moul.io/motd"
 	"moul.io/srand"
 	"pathwar.land/pathwar/v2/go/pkg/errcode"
 	"pathwar.land/pathwar/v2/go/pkg/pwagent"
@@ -257,6 +259,9 @@ func main() {
 			FlagSet:   serverFlags,
 			Options:   []ff.Option{ff.WithEnvVarNoPrefix()},
 			Exec: func(args []string) error {
+				fmt.Println(motd.Default())
+				fmt.Println(banner.Inline("api server"))
+
 				err := globalPreRun()
 				if err != nil {
 					return err
@@ -824,6 +829,10 @@ func main() {
 			if err := globalPreRun(); err != nil {
 				return err
 			}
+
+			fmt.Println(motd.Default())
+			fmt.Println(banner.Inline("agent"))
+
 			cleanup, err := initSentryFromEnv("starting agent")
 			if err != nil {
 				return err

go/cmd/pwinit/main.go

@@ -13,6 +13,7 @@ import (
 	"syscall"
 
 	"github.com/peterbourgon/ff/ffcli"
+	"moul.io/banner"
 	"pathwar.land/pathwar/v2/go/pkg/errcode"
 	"pathwar.land/pathwar/v2/go/pkg/pwinit"
 )
@@ -26,6 +27,12 @@ func main() {
 		Exec: func(args []string) error {
 			// FIXME: lock to block other commands
 
+			if len(args) < 1 {
+				return flag.ErrHelp
+			}
+
+			fmt.Println(banner.Inline("pwinit"))
+
 			_, err := os.Stat("/pwinit/config.json")
 			if err != nil {
 				log.Printf("no such config file, skipping on-init hook (%v)", err)
@@ -117,11 +124,14 @@ func main() {
 		Usage:       "pwinit <subcommand> [flags] [args...]",
 		LongHelp:    "More info here: https://github.com/pathwar/pathwar/wiki/CLI#pwinit",
 		Subcommands: []*ffcli.Command{entrypoint, env, config, passphrase},
-		Exec:        func([]string) error { return flag.ErrHelp },
+		Exec: func([]string) error {
+			fmt.Println(banner.Inline("pwinit"))
+			return flag.ErrHelp
+		},
 	}
 
 	args := os.Args[1:]
-	if args[0] == "entrypoint" && len(args) > 1 && args[1] != "--" {
+	if len(args) > 0 && args[0] == "entrypoint" && len(args) > 1 && args[1] != "--" {
 		args = append([]string{"entrypoint", "--"}, args[1:]...)
 	}
 	if err := root.Run(args); err != nil {