Report "pool ls" quantities in human readable form by default

Mangle the items received from the api to add bin_free,
bin_used and bin_size as 3-digits+unit approximation of
the original int64 values.

Example:

{
        "bin_free": "2.12g",
        "bin_size": "30.3g",
        "bin_used": "26.6g",
}

For original values:

{
        "free": 2278817792,
        "size": 32574881792,
        "used": 28615196672,
}

core/commands/pool_ls.go

@@ -8,6 +8,8 @@ import (
 	"github.com/opensvc/om3/core/output"
 	"github.com/opensvc/om3/core/rawconfig"
 	"github.com/opensvc/om3/daemon/api"
+	"github.com/opensvc/om3/util/sizeconv"
+	"github.com/opensvc/om3/util/unstructured"
 )
 
 type (
@@ -18,6 +20,25 @@ type (
 )
 
 func (t *CmdPoolLs) Run() error {
+
+	render := func(items api.PoolItems) {
+		lines := make(unstructured.List, len(items))
+		for i, item := range items {
+			u := item.Unstructured()
+			u["bin_free"] = sizeconv.BSizeCompact(float64(item.Free))
+			u["bin_used"] = sizeconv.BSizeCompact(float64(item.Used))
+			u["bin_size"] = sizeconv.BSizeCompact(float64(item.Size))
+			lines[i] = u
+		}
+		output.Renderer{
+			DefaultOutput: "tab=NAME:name,TYPE:type,CAPABILITIES:capabilities[*],HEAD:head,VOLUME_COUNT:volume_count,BIN_SIZE:bin_size,BIN_USED:bin_used,BIN_FREE:bin_free",
+			Output:        t.Output,
+			Color:         t.Color,
+			Data:          lines,
+			Colorize:      rawconfig.Colorize,
+		}.Print()
+	}
+
 	c, err := client.New(client.WithURL(t.Server))
 	if err != nil {
 		return err
@@ -32,13 +53,7 @@ func (t *CmdPoolLs) Run() error {
 	}
 	switch resp.StatusCode() {
 	case 200:
-		output.Renderer{
-			DefaultOutput: "tab=NAME:name,TYPE:type,CAPABILITIES:capabilities[*],HEAD:head,VOLUME_COUNT:volume_count,SIZE:size,USED:used,FREE:free",
-			Output:        t.Output,
-			Color:         t.Color,
-			Data:          resp.JSON200.Items,
-			Colorize:      rawconfig.Colorize,
-		}.Print()
+		render(resp.JSON200.Items)
 	case 401:
 		return fmt.Errorf("%s", resp.JSON401)
 	case 403: