Print start-up timings as human-readable approximation

Signed-off-by: Han Verstraete <welteki@pm.me>

cmd/up.go

@@ -16,6 +16,7 @@ import (
 	"github.com/spf13/cobra"
 	flag "github.com/spf13/pflag"
 
+	units "github.com/docker/go-units"
 	"github.com/openfaas/faasd/pkg"
 )
 
@@ -68,7 +69,7 @@ func runUp(cmd *cobra.Command, _ []string) error {
 		return err
 	}
 
-	log.Printf("Supervisor created in: %s\n", time.Since(start).String())
+	log.Printf("Supervisor created in: %s\n", units.HumanDuration(time.Since(start)))
 
 	start = time.Now()
 	if err := supervisor.Start(services); err != nil {
@@ -76,7 +77,7 @@ func runUp(cmd *cobra.Command, _ []string) error {
 	}
 	defer supervisor.Close()
 
-	log.Printf("Supervisor init done in: %s\n", time.Since(start).String())
+	log.Printf("Supervisor init done in: %s\n", units.HumanDuration(time.Since(start)))
 
 	shutdownTimeout := time.Second * 1
 	timeout := time.Second * 60

go.mod

@@ -13,6 +13,7 @@ require (
 	github.com/docker/distribution v2.8.0+incompatible
 	github.com/docker/docker v17.12.0-ce-rc1.0.20191113042239-ea84732a7725+incompatible // indirect
 	github.com/docker/docker-credential-helpers v0.6.3 // indirect
+	github.com/docker/go-units v0.4.0
 	github.com/gorilla/mux v1.8.0
 	github.com/morikuni/aec v1.0.0
 	github.com/opencontainers/runtime-spec v1.0.3-0.20200929063507-e6143ca7d51d

pkg/supervisor.go

@@ -24,6 +24,7 @@ import (
 	"github.com/pkg/errors"
 
 	"github.com/containerd/containerd/namespaces"
+	units "github.com/docker/go-units"
 	"github.com/opencontainers/runtime-spec/specs-go"
 )
 
@@ -112,7 +113,7 @@ func (s *Supervisor) Start(svcs []Service) error {
 		}
 		images[svc.Name] = img
 		size, _ := img.Size(ctx)
-		fmt.Printf("Prepare done for: %s, %d bytes\n", svc.Image, size)
+		fmt.Printf("Prepare done for: %s, %s\n", svc.Image, units.HumanSize(float64(size)))
 	}
 
 	for _, svc := range svcs {

vendor/modules.txt

@@ -151,6 +151,7 @@ github.com/docker/go-connections/nat
 # github.com/docker/go-events v0.0.0-20190806004212-e31b211e4f1c
 github.com/docker/go-events
 # github.com/docker/go-units v0.4.0
+## explicit
 github.com/docker/go-units
 # github.com/gogo/googleapis v1.4.0
 github.com/gogo/googleapis/google/rpc