docs/commands/ls.go

184 lines
4.0 KiB
Go

package commands
import (
"fmt"
"os"
"strings"
"text/tabwriter"
"github.com/codegangsta/cli"
"github.com/docker/machine/libmachine"
"github.com/docker/machine/log"
)
// FilterOptions -
type FilterOptions struct {
SwarmName []string
DriverName []string
State []string
}
func cmdLs(c *cli.Context) {
quiet := c.Bool("quiet")
filters, err := parseFilters(c.StringSlice("filter"))
if err != nil {
log.Fatal(err)
}
provider := getDefaultProvider(c)
hostList, err := provider.List()
if err != nil {
log.Fatal(err)
}
hostList = filterHosts(hostList, filters)
// Just print out the names if we're being quiet
if quiet {
for _, host := range hostList {
fmt.Println(host.Name)
}
return
}
swarmMasters := make(map[string]string)
swarmInfo := make(map[string]string)
w := tabwriter.NewWriter(os.Stdout, 5, 1, 3, ' ', 0)
fmt.Fprintln(w, "NAME\tACTIVE\tDRIVER\tSTATE\tURL\tSWARM")
for _, host := range hostList {
swarmOptions := host.HostOptions.SwarmOptions
if swarmOptions.Master {
swarmMasters[swarmOptions.Discovery] = host.Name
}
if swarmOptions.Discovery != "" {
swarmInfo[host.Name] = swarmOptions.Discovery
}
}
items := libmachine.GetHostListItems(hostList)
sortHostListItemsByName(items)
for _, item := range items {
activeString := ""
if item.Active {
activeString = "*"
}
swarmInfo := ""
if item.SwarmOptions.Discovery != "" {
swarmInfo = swarmMasters[item.SwarmOptions.Discovery]
if item.SwarmOptions.Master {
swarmInfo = fmt.Sprintf("%s (master)", swarmInfo)
}
}
fmt.Fprintf(w, "%s\t%s\t%s\t%s\t%s\t%s\n",
item.Name, activeString, item.DriverName, item.State, item.URL, swarmInfo)
}
w.Flush()
}
func parseFilters(filters []string) (FilterOptions, error) {
options := FilterOptions{}
for _, f := range filters {
kv := strings.SplitN(f, "=", 2)
key, value := kv[0], kv[1]
switch key {
case "swarm":
options.SwarmName = append(options.SwarmName, value)
case "driver":
options.DriverName = append(options.DriverName, value)
case "state":
options.State = append(options.State, value)
default:
return options, fmt.Errorf("Unsupported filter key '%s'", key)
}
}
return options, nil
}
func filterHosts(hosts []*libmachine.Host, filters FilterOptions) []*libmachine.Host {
if len(filters.SwarmName) == 0 &&
len(filters.DriverName) == 0 &&
len(filters.State) == 0 {
return hosts
}
filteredHosts := []*libmachine.Host{}
swarmMasters := getSwarmMasters(hosts)
for _, h := range hosts {
if filterHost(h, filters, swarmMasters) {
filteredHosts = append(filteredHosts, h)
}
}
return filteredHosts
}
func getSwarmMasters(hosts []*libmachine.Host) map[string]string {
swarmMasters := make(map[string]string)
for _, h := range hosts {
swarmOptions := h.HostOptions.SwarmOptions
if swarmOptions != nil && swarmOptions.Master {
swarmMasters[swarmOptions.Discovery] = h.Name
}
}
return swarmMasters
}
func filterHost(host *libmachine.Host, filters FilterOptions, swarmMasters map[string]string) bool {
swarmMatches := matchesSwarmName(host, filters.SwarmName, swarmMasters)
driverMatches := matchesDriverName(host, filters.DriverName)
stateMatches := matchesState(host, filters.State)
return swarmMatches && driverMatches && stateMatches
}
func matchesSwarmName(host *libmachine.Host, swarmNames []string, swarmMasters map[string]string) bool {
if len(swarmNames) == 0 {
return true
}
for _, n := range swarmNames {
if host.HostOptions.SwarmOptions != nil {
if n == swarmMasters[host.HostOptions.SwarmOptions.Discovery] {
return true
}
}
}
return false
}
func matchesDriverName(host *libmachine.Host, driverNames []string) bool {
if len(driverNames) == 0 {
return true
}
for _, n := range driverNames {
if host.DriverName == n {
return true
}
}
return false
}
func matchesState(host *libmachine.Host, states []string) bool {
if len(states) == 0 {
return true
}
for _, n := range states {
s, err := host.Driver.GetState()
if err != nil {
log.Warn(err)
}
if n == s.String() {
return true
}
}
return false
}