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help.go
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help.go
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package commands
import (
"errors"
"strings"
"github.com/cloudfoundry/cli/cf/commandregistry"
"github.com/cloudfoundry/cli/cf/configuration/pluginconfig"
"github.com/cloudfoundry/cli/cf/flags"
"github.com/cloudfoundry/cli/cf/help"
"github.com/cloudfoundry/cli/cf/requirements"
"github.com/cloudfoundry/cli/cf/terminal"
. "github.com/cloudfoundry/cli/cf/i18n"
)
type Help struct {
ui terminal.UI
config pluginconfig.PluginConfiguration
}
func init() {
commandregistry.Register(&Help{})
}
func (cmd *Help) MetaData() commandregistry.CommandMetadata {
return commandregistry.CommandMetadata{
Name: "help",
ShortName: "h",
Description: T("Show help"),
Usage: []string{
T("CF_NAME help [COMMAND]"),
},
}
}
func (cmd *Help) Requirements(requirementsFactory requirements.Factory, fc flags.FlagContext) []requirements.Requirement {
reqs := []requirements.Requirement{}
return reqs
}
func (cmd *Help) SetDependency(deps commandregistry.Dependency, pluginCall bool) commandregistry.Command {
cmd.ui = deps.UI
cmd.config = deps.PluginConfig
return cmd
}
func (cmd *Help) Execute(c flags.FlagContext) error {
if len(c.Args()) == 0 {
help.ShowHelp(cmd.ui.Writer(), help.GetHelpTemplate())
} else {
cmdName := c.Args()[0]
if commandregistry.Commands.CommandExists(cmdName) {
cmd.ui.Say(commandregistry.Commands.CommandUsage(cmdName))
} else {
//check plugin commands
found := false
for _, meta := range cmd.config.Plugins() {
for _, c := range meta.Commands {
if c.Name == cmdName || c.Alias == cmdName {
output := T("NAME:") + "\n"
output += " " + c.Name + " - " + c.HelpText + "\n"
if c.Alias != "" {
output += "\n" + T("ALIAS:") + "\n"
output += " " + c.Alias + "\n"
}
output += "\n" + T("USAGE:") + "\n"
output += " " + c.UsageDetails.Usage + "\n"
if len(c.UsageDetails.Options) > 0 {
output += "\n" + T("OPTIONS:") + "\n"
//find longest name length
l := 0
for n := range c.UsageDetails.Options {
if len(n) > l {
l = len(n)
}
}
for n, f := range c.UsageDetails.Options {
output += " -" + n + strings.Repeat(" ", 7+(l-len(n))) + f + "\n"
}
}
cmd.ui.Say(output)
found = true
}
}
}
if !found {
return errors.New("'" + cmdName + "' is not a registered command. See 'cf help'")
}
}
}
return nil
}