fix inspect format result

Currently `docker inspect -f` use json.Unmarshal() unmarshal
to interface, it will store all JSON numbers in float64, so
we use `docker inspect 4f0d73b75a0d | grep Memory` and
`docker inspect -f {{.HostConfig.Memory}} 4f0d73b75a0d` will
get different values.

Signed-off-by: Qiang Huang <h.huangqiang@huawei.com>

api/client/inspect.go

@@ -57,9 +57,14 @@ func (cli *DockerCli) CmdInspect(args ...string) error {
 				continue
 			}
 		} else {
-			// Has template, will render
 			var value interface{}
-			if err := json.Unmarshal(obj, &value); err != nil {
+
+			// Do not use `json.Unmarshal()` because unmarshal JSON into
+			// an interface value, Unmarshal stores JSON numbers in
+			// float64, which is different from `json.Indent()` does.
+			dec := json.NewDecoder(bytes.NewReader(obj))
+			dec.UseNumber()
+			if err := dec.Decode(&value); err != nil {
 				fmt.Fprintf(cli.err, "%s\n", err)
 				status = 1
 				continue