diff options
Diffstat (limited to 'command.go')
| -rw-r--r-- | command.go | 19 |
1 files changed, 13 insertions, 6 deletions
@@ -1,7 +1,6 @@ +// Handler to make management of subcommands easier. package main -// handle the command infrastructure - import ( "fmt" "flag" @@ -14,13 +13,14 @@ type ( Short string // a short description to display Long string // a long help text Example string // an example string - Run func(*Command, []string) + Run func(*Command, []string) // the command to run - flagSet *flag.FlagSet - commands []*Command + flagSet *flag.FlagSet // internal flagset with all flags + commands []*Command // the list of subcommands } ) +// This function adds a new sub command. func (c *Command) AddCommand(cmds... *Command) { res := c.commands for _, cmd := range cmds { @@ -29,6 +29,7 @@ func (c *Command) AddCommand(cmds... *Command) { c.commands = res } +// Evaluate the arguments and call either the subcommand or parse it as flags. func (c *Command) eval(args []string) error { var name string = "" var rest []string = []string{} @@ -59,15 +60,20 @@ func (c *Command) eval(args []string) error { return nil } +// Execute the command. It will fetch os.Args[1:] itself. func (c *Command) Execute() error { return c.eval(os.Args[1:]) } +// Return the flagset currently in use. func (c *Command) Flags() *flag.FlagSet { - if c.flagSet == nil { c.flagSet = flag.NewFlagSet(c.Use, flag.ContinueOnError) } + if c.flagSet == nil { + c.flagSet = flag.NewFlagSet(c.Use, flag.ContinueOnError) + } return c.flagSet } +// Print the help for the current command or a subcommand. func (c *Command) Help(args []string) { if len(args) > 0 { for _, cmd := range c.commands { @@ -81,6 +87,7 @@ func (c *Command) Help(args []string) { c.Usage() } +// Print the usage information. func (c *Command) Usage() { usage := "" if c.Use != "" { |