Import docker/docker/client

Signed-off-by: Daniel Nephin <dnephin@gmail.com>

client/utils.go

@@ -0,0 +1,33 @@
+package client
+
+import (
+	"github.com/docker/docker/api/types/filters"
+	"net/url"
+	"regexp"
+)
+
+var headerRegexp = regexp.MustCompile(`\ADocker/.+\s\((.+)\)\z`)
+
+// getDockerOS returns the operating system based on the server header from the daemon.
+func getDockerOS(serverHeader string) string {
+	var osType string
+	matches := headerRegexp.FindStringSubmatch(serverHeader)
+	if len(matches) > 0 {
+		osType = matches[1]
+	}
+	return osType
+}
+
+// getFiltersQuery returns a url query with "filters" query term, based on the
+// filters provided.
+func getFiltersQuery(f filters.Args) (url.Values, error) {
+	query := url.Values{}
+	if f.Len() > 0 {
+		filterJSON, err := filters.ToParam(f)
+		if err != nil {
+			return query, err
+		}
+		query.Set("filters", filterJSON)
+	}
+	return query, nil
+}